Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied
12:39 p.m.
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I debugged vdsm with PyCharm, And I logged on my Centos 7.2 with root, and
get an error as follows:
Problem:
Traceback (most recent call last):
File "/usr/share/vdsm/vdsm", line 149, in run
serve_clients(log)
File "/usr/share/vdsm/vdsm", line 104, in serve_clients
cif = clientIF.getInstance(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 204, in getInstance
cls._instance = clientIF(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 106, in __init__
secret.clear()
File "/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line 92, in
clear
con = libvirtconnection.get()
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line
163, in get
password)
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line
99, in open_connection
return utils.retry(libvirtOpen, timeout=10, sleep=0.2)
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in retry
return func()
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in
openAuth
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: Failed to connect socket to '/var/run/libvirt/libvirt-sock':
Permission denied
Investitate:
According to the traceback above, the code in libvirt.py as below, and
os.geteuid() get '0' which shows the current user is root;
def openAuth(uri, auth, flags=0):
#print os.geteuid()
ret = libvirtmod.virConnectOpenAuth(uri, auth, flags)
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
return virConnect(_obj=ret)
[root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock
srwxrwx---. 1 root qemu 0 Jul 19 23:43 /var/run/libvirt/libvirt-sock
According that, root should not get an Permission denied error ? But why?
And I setenforce=0 , and still show Perssion denied error.
What's the reason? And how to solve it?
Thank you.
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link=3Dblue =
vlink=3Dpurple style=3D'text-justify-trim:punctuation'><div =
class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US>I debugged =
vdsm with PyCharm, And I logged on my Centos 7.2 with root, and =
get an error as follows:<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>Problem:<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>Traceback (most recent call
last):<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US> File =
"/usr/share/vdsm/vdsm", line 149, in =
run<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US> =
serve_clients(log)<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> File "/usr/share/vdsm/vdsm", line 104, in =
serve_clients<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> cif =3D clientIF.getInstance(irs, log, =
scheduler)<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> File "/usr/share/vdsm/clientIF.py", line =
204, in getInstance<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> cls._instance =3D clientIF(irs, log, =
scheduler)<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> File "/usr/share/vdsm/clientIF.py", line =
106, in __init__<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>
secret.clear()<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US> File =
"/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92, in clear<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> con =3D =
libvirtconnection.get()<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>
password)<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US> return =
utils.retry(libvirtOpen, timeout=3D10, =
sleep=3D0.2)<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> File =
"/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in =
retry<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US> return
func()<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US> File =
"/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth<o:p></o:p></span></p><p class=3DMsoNormal><span
=
lang=3DEN-US> if ret is None:raise =
libvirtError('virConnectOpenAuth()
failed')<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>libvirtError: Failed to connect =
socket to '/var/run/libvirt/libvirt-sock': Permission =
denied<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>Investitate:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>According to the traceback above, =
the code in libvirt.py as below, and os.geteuid() get =
‘0’ which shows the current user is =
root;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>def openAuth(uri, auth,
flags=3D0):<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US>
#print =
os.geteuid()<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US> ret =3D =
libvirtmod.virConnectOpenAuth(uri, auth,
flags)<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US> if ret is =
None:raise libvirtError('virConnectOpenAuth() =
failed')<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'text-indent:21.0pt'><span lang=3DEN-US>return =
virConnect(_obj=3Dret)<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>[root@server117 libvirt]# ll =
/var/run/libvirt/libvirt-sock<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>srwxrwx---. 1 root qemu 0 Jul 19 =
23:43 /var/run/libvirt/libvirt-sock<o:p></o:p></span></p><p =
class=3DMsoNormal><span
lang=3DEN-US><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>According that, root should not get =
an Permission denied error ? But why?<o:p></o:p></span></p><p
=
class=3DMsoNormal><span
lang=3DEN-US><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>And I setenforce=3D0 , and still =
show Perssion denied error.<o:p></o:p></span></p><p =
class=3DMsoNormal><span
lang=3DEN-US><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>What’s the reason? And how to =
solve it?<o:p></o:p></span></p><p class=3DMsoNormal><span
=
lang=3DEN-US><o:p> </o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US>Thank
you.<o:p></o:p></span></p></div></body></html>
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10:50 p.m.
Adding some people from virt team.
Il 23/Lug/2016 11:44, "lifuqiong" <lifuqiong(a)cncloudsec.com> ha scritto:
I debugged vdsm with PyCharm, And I logged on my Centos 7.2 with root,
and get an
error as follows:
Problem:
Traceback (most recent call last):
File "/usr/share/vdsm/vdsm", line 149, in run
serve_clients(log)
File "/usr/share/vdsm/vdsm", line 104, in serve_clients
cif = clientIF.getInstance(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 204, in getInstance
cls._instance = clientIF(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 106, in __init__
secret.clear()
File "/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line 92,
in clear
con = libvirtconnection.get()
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line
163, in get
password)
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line
99, in open_connection
return utils.retry(libvirtOpen, timeout=10, sleep=0.2)
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in
retry
return func()
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in
openAuth
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: Failed to connect socket to
'/var/run/libvirt/libvirt-sock':
Permission denied
Investitate:
According to the traceback above, the code in libvirt.py as below, and
os.geteuid() get ‘0’ which shows the current user is root;
def openAuth(uri, auth, flags=0):
#print os.geteuid()
ret = libvirtmod.virConnectOpenAuth(uri, auth, flags)
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
return virConnect(_obj=ret)
[root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock
srwxrwx---. 1 root qemu 0 Jul 19 23:43 /var/run/libvirt/libvirt-sock
According that, root should not get an Permission denied error ? But why?
And I setenforce=0 , and still show Perssion denied error.
What’s the reason? And how to solve it?
Thank you.
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--Apple-Mail-D1347541-AC09-4E82-BD2E-44566BA8A20C--
9:02 a.m.
New subject: 答复: Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied
This is a multipart message in MIME format.
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charset="utf-8"
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=20
I do make a mistake because I just print os.getuid() show the user root; =
but os.geteuid() show the current user is still vdsm;
=20
Anyway , I still don=E2=80=99t know how to debug vdsm, I cann=E2=80=99t =
log in to centos with user VDSM, because I don=E2=80=99t know the passwd =
of user vdsm and if I changed the password, the service vdsmd will =
cann=E2=80=99t start.
=20
You told me =E2=80=9Cshould follow the devel setup wiki=E2=80=9D , =
what=E2=80=99s the true link of vdsm devel setup wiki ? I can=E2=80=99t =
get useful information in ovirt.org or google.
=20
=20
Thank you
=20
=E5=8F=91=E4=BB=B6=E4=BA=BA: Michal Skrivanek =
[mailto:mskrivan@redhat.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2016=E5=B9=B47=E6=9C=8826=E6=97=A5 =
5:00
=E6=94=B6=E4=BB=B6=E4=BA=BA: lifuqiong
=E6=8A=84=E9=80=81: users; devel
=E4=B8=BB=E9=A2=98: Re: [ovirt-devel] Debug vdsm 4.0.0 report error: =
libvirt: XML-RPC error : Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
=20
On 25 Jul 2016, at 21:50, Sandro Bonazzola <sbonazzo(a)redhat.com> wrote:
Adding some people from virt team.
Il 23/Lug/2016 11:44, "lifuqiong" <lifuqiong(a)cncloudsec.com> ha scritto:
I debugged vdsm with PyCharm, And I logged on my Centos 7.2 with root, =
and get
an error as follows:
=20
Problem:
=20
Traceback (most recent call last):
File "/usr/share/vdsm/vdsm", line 149, in run
serve_clients(log)
File "/usr/share/vdsm/vdsm", line 104, in serve_clients
cif =3D clientIF.getInstance(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 204, in getInstance
cls._instance =3D clientIF(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 106, in __init__
secret.clear()
File "/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92,
in clear
con =3D libvirtconnection.get()
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get
password)
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection
return utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in =
retry
return func()
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
Investitate:
According to the traceback above, the code in libvirt.py as below, and =
os.geteuid() get =E2=80=980=E2=80=99 which shows the current user is =
root;
=20
vdsm is not supposed to be run under root user. For debugging you should =
follow the devel setup wiki and not change a regular host.=20
Depends what you modified, it's impossible to say from what you =
described....but a general advice is you simply don't do that:)
=20
def openAuth(uri, auth, flags=3D0):
#print os.geteuid()
ret =3D libvirtmod.virConnectOpenAuth(uri, auth, flags)
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
return virConnect(_obj=3Dret)
=20
[root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock
srwxrwx---. 1 root qemu 0 Jul 19 23:43 /var/run/libvirt/libvirt-sock
=20
According that, root should not get an Permission denied error ? But =
why?
=20
And I setenforce=3D0 , and still show Perssion denied error.
=20
What=E2=80=99s the reason? And how to solve it?
=20
Thank you.
_______________________________________________
Devel mailing list
Devel(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/devel
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link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
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class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I do make a mistake because I just print os.getuid() show the user =
root; but os.geteuid() show the current user is still =
vdsm;<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Anyway , I still don=E2=80=99t know how to debug vdsm, I =
cann=E2=80=99t log in to centos with user VDSM, because I don=E2=80=99t =
know the passwd of user vdsm and if I changed the password, the service =
vdsmd will cann=E2=80=99t start.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You told me =E2=80=9C</span><span lang=3DEN-US>should follow the =
devel setup wiki</span><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9D , what=E2=80=99s the true link of vdsm devel setup wiki =
?=C2=A0 I can=E2=80=99t get useful information in ovirt.org or =
google.<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> Michal Skrivanek =
[mailto:mskrivan@redhat.com] <br></span><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> 2016</span><span =
style=3D'font-size:10.0pt'>=E5=B9=B4<span =
lang=3DEN-US>7</span>=E6=9C=88<span
lang=3DEN-US>26</span>=E6=97=A5<span =
lang=3DEN-US> 5:00<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span
=
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
lifuqiong<br></span><b>=E6=8A=84=E9=80=81<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> users; =
devel<br></span><b>=E4=B8=BB=E9=A2=98<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> Re: [ovirt-devel] Debug
=
vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to connect =
socket to '/var/run/libvirt/libvirt-sock': Permission =
denied<o:p></o:p></span></span></p></div></div><p
=
class=3DMsoNormal><span
lang=3DEN-US><o:p> </o:p></span></p><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p></div><div><p
class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span lang=3DEN-US><br>On 25 Jul
2016, at =
21:50, Sandro Bonazzola <<a =
href=3D"mailto:sbonazzo@redhat.com">sbonazzo@redhat.com</a>> =
wrote:<o:p></o:p></span></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p><span =
lang=3DEN-US>Adding some people from virt =
team.<o:p></o:p></span></p><p><span lang=3DEN-US>Il
23/Lug/2016 11:44, =
"lifuqiong" <<a =
href=3D"mailto:lifuqiong@cncloudsec.com">lifuqiong@cncloudsec.com</a>>=
ha scritto:<br>><br>> I debugged vdsm with PyCharm, And I
logged =
on my Centos 7.2 with root, and get an error as =
follows:<br>><br>>
<br>><br>>
Problem:<br>><br>> =
<br>><br>> Traceback (most recent call =
last):<br>><br>> File
"/usr/share/vdsm/vdsm", =
line 149, in run<br>><br>> =
serve_clients(log)<br>><br>> File =
"/usr/share/vdsm/vdsm", line 104, in =
serve_clients<br>><br>> cif =3D
=
clientIF.getInstance(irs, log, scheduler)<br>><br>>
File =
"/usr/share/vdsm/clientIF.py", line 204, in =
getInstance<br>><br>>
cls._instance =3D =
clientIF(irs, log, scheduler)<br>><br>> File =
"/usr/share/vdsm/clientIF.py", line 106, in =
__init__<br>><br>> =
secret.clear()<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92, in clear<br>><br>> con =3D =
libvirtconnection.get()<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get<br>><br>> =
password)<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection<br>><br>>
return =
utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)<br>><br>> =
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", =
line 546, in retry<br>><br>>
return =
func()<br>><br>> File =
"/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth<br>><br>> if ret is
None:raise =
libvirtError('virConnectOpenAuth() failed')<br>><br>> =
libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission
denied<br>><br>> =
<br>><br>>
Investitate:<br>><br>> According to the =
traceback above, the code in libvirt.py as below, and os.geteuid() =
get =E2=80=980=E2=80=99 which shows the current user is =
root;<o:p></o:p></span></p></div></blockquote><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p></div><p
=
class=3DMsoNormal><span lang=3DEN-US>vdsm is not supposed to be run =
under root user. For debugging you should follow the devel setup wiki =
and not change a regular
host. <o:p></o:p></span></p><div><p =
class=3DMsoNormal><span lang=3DEN-US>Depends what you modified, it's =
impossible to say from what you described....but a general advice is you =
simply don't do
that:)<br><br><o:p></o:p></span></p><div><p><span
=
lang=3DEN-US>><br>> <br>><br>>
def openAuth(uri, auth, =
flags=3D0):<br>><br>> =
#print =
os.geteuid()<br>><br>> ret =3D =
libvirtmod.virConnectOpenAuth(uri, auth, flags)<br>><br>> =
if ret is None:raise =
libvirtError('virConnectOpenAuth() failed')<br>><br>>
return =
virConnect(_obj=3Dret)<br>><br>>
<br>><br>> =
[root@server117 libvirt]# ll =
/var/run/libvirt/libvirt-sock<br>><br>> srwxrwx---. 1 root qemu
0 =
Jul 19 23:43 /var/run/libvirt/libvirt-sock<br>><br>> =
<br>><br>> According that, root should not get an
Permission =
denied error ? But why?<br>><br>>
<br>><br>> And I =
setenforce=3D0 , and still show Perssion denied error.<br>><br>>
=
<br>><br>> What=E2=80=99s the reason? And how to solve
=
it?<br>><br>> <br>><br>>
Thank =
you.<br>><br>><br>> =
_______________________________________________<br>> Devel mailing =
list<br>> <a =
href=3D"mailto:Devel@ovirt.org">Devel@ovirt.org</a><br>>
<a =
href=3D"http://lists.ovirt.org/mailman/listinfo/devel">http:...
.org/mailman/listinfo/devel</a><o:p></o:p></span></p></div></div></div></=
body></html>
------=_NextPart_000_00C9_01D1E746.5B825490--
9:06 a.m.
--Apple-Mail=_A58705BB-94F0-41B3-912E-C81871820D95
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=utf-8
On 26 Jul 2016, at 08:02, lifuqiong <lifuqiong(a)cncloudsec.com>
wrote:
=20
=20
I do make a mistake because I just print os.getuid() show the user =
root; but
os.geteuid() show the current user is still vdsm;
=20
Anyway , I still don=E2=80=99t know how to debug vdsm, I cann=E2=80=99t =
log in to
centos with user VDSM, because I don=E2=80=99t know the passwd =
of user vdsm and if I changed the password, the service vdsmd will =
cann=E2=80=99t start.
the vdsm account is intentionally disabled for interactive login
=20
You told me =E2=80=9Cshould follow the devel setup wiki=E2=80=9D , =
what=E2=80=99s
the true link of vdsm devel setup wiki ? I can=E2=80=99t =
get useful information in ovirt.org <http://ovirt.org/> or google.
http://www.ovirt.org/develop/developer-guide/vdsm/developers/ =
<http://www.ovirt.org/develop/developer-guide/vdsm/developers/> has tips =
how to build from source and what packages are needed
Anything specific you=E2=80=99re troubleshooting?
Thanks,
michal
=20
=20
Thank you
=20
=E5=8F=91=E4=BB=B6=E4=BA=BA: Michal Skrivanek =
[mailto:mskrivan@redhat.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:
2016=E5=B9=B47=E6=9C=8826=E6=97=A5=
5:00
=E6=94=B6=E4=BB=B6=E4=BA=BA: lifuqiong
=E6=8A=84=E9=80=81: users; devel
=E4=B8=BB=E9=A2=98: Re: [ovirt-devel] Debug vdsm 4.0.0 report error: =
libvirt:
XML-RPC error : Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
=20
=20
On 25 Jul 2016, at 21:50, Sandro Bonazzola <sbonazzo(a)redhat.com =
<mailto:sbonazzo@redhat.com>> wrote:
=20
Adding some people from virt team.
=20
Il 23/Lug/2016 11:44, "lifuqiong" <lifuqiong(a)cncloudsec.com =
<mailto:lifuqiong@cncloudsec.com>> ha scritto:
>
> I debugged vdsm with PyCharm, And I logged on my Centos 7.2 with =
root, and
get an error as follows:
>
> =20
>
> Problem:
>
> =20
>
> Traceback (most recent call last):
>
> File "/usr/share/vdsm/vdsm", line 149, in run
>
> serve_clients(log)
>
> File "/usr/share/vdsm/vdsm", line 104, in serve_clients
>
> cif =3D clientIF.getInstance(irs, log, scheduler)
>
> File "/usr/share/vdsm/clientIF.py", line 204, in getInstance
>
> cls._instance =3D clientIF(irs, log, scheduler)
>
> File "/usr/share/vdsm/clientIF.py", line 106, in __init__
>
> secret.clear()
>
> File "/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92, in clear
>
> con =3D libvirtconnection.get()
>
> File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get
>
> password)
>
> File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection
>
> return utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)
>
> File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, =
in retry
>
> return func()
>
> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth
>
> if ret is None:raise libvirtError('virConnectOpenAuth() failed')
>
> libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
>
> =20
>
> Investitate:
>
> According to the traceback above, the code in libvirt.py as below, =
and
os.geteuid() get =E2=80=980=E2=80=99 which shows the current user =
is root;
=20
=20
vdsm is not supposed to be run under root user. For debugging you =
should follow
the devel setup wiki and not change a regular host.=20
Depends what you modified, it's impossible to say from what you =
described....but a general advice is you simply don't do that:)
=20
>
> =20
>
> def openAuth(uri, auth, flags=3D0):
>
> #print os.geteuid()
>
> ret =3D libvirtmod.virConnectOpenAuth(uri, auth, flags)
>
> if ret is None:raise libvirtError('virConnectOpenAuth() failed')
>
> return virConnect(_obj=3Dret)
>
> =20
>
> [root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock
>
> srwxrwx---. 1 root qemu 0 Jul 19 23:43 /var/run/libvirt/libvirt-sock
>
> =20
>
> According that, root should not get an Permission denied error ? But =
why?
>
> =20
>
> And I setenforce=3D0 , and still show Perssion denied error.
>
> =20
>
> What=E2=80=99s the reason? And how to solve it?
>
> =20
>
> Thank you.
>
>
> _______________________________________________
> Devel mailing list
> Devel(a)ovirt.org <mailto:Devel@ovirt.org>
> http://lists.ovirt.org/mailman/listinfo/devel =
<http://lists.ovirt.org/mailman/listinfo/devel>
--Apple-Mail=_A58705BB-94F0-41B3-912E-C81871820D95
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
charset=utf-8
<html><head><meta http-equiv=3D"Content-Type"
content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><br class=3D""><div><blockquote
type=3D"cite" class=3D""><div =
class=3D"">On 26 Jul 2016, at 08:02, lifuqiong <<a =
href=3D"mailto:lifuqiong@cncloudsec.com" =
class=3D"">lifuqiong(a)cncloudsec.com</a>&gt;
wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div
=
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
style=3D"font-size: 10.5pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">I do make a =
mistake because I just print os.getuid() show the user root; but =
os.geteuid() show the current user is still vdsm;<o:p =
class=3D""></o:p></span></div><div style=3D"margin:
0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Anyway , I =
still don=E2=80=99t know how to debug vdsm, I cann=E2=80=99t log in to =
centos with user VDSM, because I don=E2=80=99t know the passwd of user =
vdsm and if I changed the password, the service vdsmd will cann=E2=80=99t =
start.</span></div></div></div></blockquote><div><br
class=3D""></div>the =
vdsm account is intentionally disabled for interactive =
login</div><div><br class=3D""><blockquote
type=3D"cite" class=3D""><div =
class=3D""><div class=3D"WordSection1" style=3D"page:
WordSection1; =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><div style=3D"margin: 0cm 0cm 0.0001pt;
=
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""></o:p></span></div><div style=3D"margin:
0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">You told me =
=E2=80=9C</span><span lang=3D"EN-US" class=3D"">should
follow the devel =
setup wiki</span><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
=
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"
class=3D"">=E2=
=80=9D , what=E2=80=99s the true link of vdsm devel setup wiki ? I =
can=E2=80=99t get useful information in<span =
class=3D"Apple-converted-space"> </span><a
href=3D"http://ovirt.org/"=
style=3D"color: purple; text-decoration: underline;" =
class=3D"">ovirt.org</a><span =
class=3D"Apple-converted-space"> </span>or =
google.</span></div></div></div></blockquote><div><br
class=3D""></div><a =
href=3D"http://www.ovirt.org/develop/developer-guide/vdsm/developers... =
class=3D"">http://www.ovirt.org/develop/developer-guide/vdsm...
a> has tips how to build from source and what packages are =
needed</div><div>Anything specific you=E2=80=99re =
troubleshooting?</div><div><br =
class=3D""></div><div>Thanks,</div><div>michal</div><div><br
=
class=3D""><blockquote type=3D"cite"
class=3D""><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
style=3D"font-size: 10.5pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D""><o:p
class=3D""></o:p></span></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
style=3D"font-size: =
10.5pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p
class=3D""> </o:p></span></div><div
style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Thank
you<o:p =
class=3D""></o:p></span></div><div style=3D"margin:
0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div><div
class=3D""><div =
style=3D"border-style: solid none none; border-top-color: rgb(181, 196, =
223); border-top-width: 1pt; padding: 3pt 0cm 0cm;" class=3D""><div
=
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><b class=3D""><span
style=3D"font-size: =
10pt;" class=3D"">=E5=8F=91=E4=BB=B6=E4=BA=BA<span
lang=3D"EN-US" =
class=3D"">:</span></span></b><span
lang=3D"EN-US" style=3D"font-size: =
10pt;" class=3D""><span =
class=3D"Apple-converted-space"> </span>Michal Skrivanek
[<a =
href=3D"mailto:mskrivan@redhat.com" =
class=3D"">mailto:mskrivan@redhat.com</a>]<span =
class=3D"Apple-converted-space"> </span><br
class=3D""></span><b =
class=3D""><span style=3D"font-size: 10pt;"
class=3D"">=E5=8F=91=E9=80=81=E6=
=97=B6=E9=97=B4<span lang=3D"EN-US"
class=3D"">:</span></span></b><span =
lang=3D"EN-US" style=3D"font-size: 10pt;"
class=3D""><span =
class=3D"Apple-converted-space"> </span>2016</span><span
=
style=3D"font-size: 10pt;" class=3D"">=E5=B9=B4<span
lang=3D"EN-US" =
class=3D"">7</span>=E6=9C=88<span lang=3D"EN-US" =
class=3D"">26</span>=E6=97=A5<span lang=3D"EN-US"
class=3D""><span =
class=3D"Apple-converted-space"> </span>5:00<br
class=3D""></span><b =
class=3D"">=E6=94=B6=E4=BB=B6=E4=BA=BA<span lang=3D"EN-US" =
class=3D"">:</span></b><span lang=3D"EN-US"
class=3D""><span =
class=3D"Apple-converted-space"> </span>lifuqiong<br =
class=3D""></span><b
class=3D"">=E6=8A=84=E9=80=81<span lang=3D"EN-US" =
class=3D"">:</span></b><span lang=3D"EN-US"
class=3D""><span =
class=3D"Apple-converted-space"> </span>users; devel<br =
class=3D""></span><b
class=3D"">=E4=B8=BB=E9=A2=98<span lang=3D"EN-US" =
class=3D"">:</span></b><span lang=3D"EN-US"
class=3D""><span =
class=3D"Apple-converted-space"> </span>Re: [ovirt-devel]
Debug =
vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to connect =
socket to '/var/run/libvirt/libvirt-sock': Permission denied<o:p =
class=3D""></o:p></span></span></div></div></div><div
style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D""><o:p
=
class=3D""> </o:p></span></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D""><o:p
=
class=3D""> </o:p></span></div></div><div
class=3D""><p =
class=3D"MsoNormal" style=3D"margin: 0cm 0cm 12pt; font-size: 12pt; =
font-family: =E5=AE=8B=E4=BD=93;"><span lang=3D"EN-US"
class=3D""><br =
class=3D"">On 25 Jul 2016, at 21:50, Sandro Bonazzola <<a =
href=3D"mailto:sbonazzo@redhat.com" style=3D"color: purple; =
text-decoration: underline;"
class=3D"">sbonazzo(a)redhat.com</a>&gt; =
wrote:<o:p
class=3D""></o:p></span></p></div><blockquote =
style=3D"margin-top: 5pt; margin-bottom: 5pt;" class=3D""><div
=
class=3D""><p style=3D"margin-right: 0cm; margin-left: 0cm;
font-size: =
12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D"">Adding some people from virt team.<o:p =
class=3D""></o:p></span></p><p
style=3D"margin-right: 0cm; margin-left: =
0cm; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;"
class=3D""><span =
lang=3D"EN-US" class=3D"">Il 23/Lug/2016 11:44,
"lifuqiong" <<a =
href=3D"mailto:lifuqiong@cncloudsec.com" style=3D"color: purple; =
text-decoration: underline;"
class=3D"">lifuqiong(a)cncloudsec.com</a>&gt; =
ha scritto:<br class=3D"">><br class=3D"">>
I debugged vdsm with =
PyCharm, And I logged on my Centos 7.2 with root, and get an error =
as follows:<br class=3D"">><br class=3D"">>
<br =
class=3D"">><br class=3D"">> Problem:<br
class=3D"">><br =
class=3D"">> <br class=3D"">><br
class=3D"">> Traceback =
(most recent call last):<br class=3D"">><br
class=3D"">> =
File "/usr/share/vdsm/vdsm", line 149, in run<br
class=3D"">><br =
class=3D"">> serve_clients(log)<br
=
class=3D"">><br class=3D"">> File
"/usr/share/vdsm/vdsm", =
line 104, in serve_clients<br class=3D"">><br
class=3D"">> =
cif =3D clientIF.getInstance(irs, log, scheduler)<br =
class=3D"">><br class=3D"">> File =
"/usr/share/vdsm/clientIF.py", line 204, in getInstance<br =
class=3D"">><br class=3D"">>
cls._instance =3D =
clientIF(irs, log, scheduler)<br class=3D"">><br
class=3D"">> =
File "/usr/share/vdsm/clientIF.py", line 106, in __init__<br =
class=3D"">><br class=3D"">>
secret.clear()<br =
class=3D"">><br class=3D"">> File =
"/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line 92, in =
clear<br class=3D"">><br class=3D"">>
con =3D =
libvirtconnection.get()<br class=3D"">><br
class=3D"">> =
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line =
163, in get<br class=3D"">><br class=3D"">>
=
password)<br class=3D"">><br class=3D"">>
File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 99, =
in open_connection<br class=3D"">><br
class=3D"">> =
return utils.retry(libvirtOpen, timeout=3D10, =
sleep=3D0.2)<br class=3D"">><br class=3D"">>
File =
"/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in retry<br =
class=3D"">><br class=3D"">>
return func()<br =
class=3D"">><br class=3D"">> File =
"/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth<br class=3D"">><br class=3D"">>
if ret =
is None:raise libvirtError('virConnectOpenAuth() failed')<br =
class=3D"">><br class=3D"">> libvirtError:
Failed to connect =
socket to '/var/run/libvirt/libvirt-sock': Permission denied<br =
class=3D"">><br class=3D"">> <br
class=3D"">><br =
class=3D"">> Investitate:<br class=3D"">><br
class=3D"">> =
According to the traceback above, the code in libvirt.py as below, and =
os.geteuid() get =E2=80=980=E2=80=99 which shows the current user =
is root;<o:p
class=3D""></o:p></span></p></div></blockquote><div
=
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D""><o:p
class=3D""> </o:p></span></div></div><div
=
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
class=3D"">vdsm is =
not supposed to be run under root user. For debugging you should follow =
the devel setup wiki and not change a regular host. <o:p =
class=3D""></o:p></span></div><div
class=3D""><div style=3D"margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D"">Depends
what you modified, =
it's impossible to say from what you described....but a general advice =
is you simply don't do that:)<br class=3D""><br
class=3D""><o:p =
class=3D""></o:p></span></div><div
class=3D""><p style=3D"margin-right: =
0cm; margin-left: 0cm; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US"
class=3D"">><br class=3D"">> =
<br class=3D"">><br class=3D"">>
def openAuth(uri, auth, =
flags=3D0):<br class=3D"">><br class=3D"">>
=
#print
os.geteuid()<br =
class=3D"">><br class=3D"">>
ret =3D =
libvirtmod.virConnectOpenAuth(uri, auth, flags)<br
class=3D"">><br =
class=3D"">> if ret is None:raise =
libvirtError('virConnectOpenAuth() failed')<br
class=3D"">><br =
class=3D"">> return virConnect(_obj=3Dret)<br
class=3D"">><br =
class=3D"">> <br class=3D"">><br
class=3D"">> =
[root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock<br =
class=3D"">><br class=3D"">> srwxrwx---. 1 root
qemu 0 Jul 19 =
23:43 /var/run/libvirt/libvirt-sock<br class=3D"">><br
class=3D"">> =
<br class=3D"">><br class=3D"">>
According that, root should =
not get an Permission denied error ? But why?<br class=3D"">><br
=
class=3D"">> <br class=3D"">><br
class=3D"">> And I =
setenforce=3D0 , and still show Perssion denied error.<br =
class=3D"">><br class=3D"">> <br
class=3D"">><br =
class=3D"">> What=E2=80=99s the reason? And how to solve it?<br =
class=3D"">><br class=3D"">> <br
class=3D"">><br =
class=3D"">> Thank you.<br class=3D"">><br
class=3D"">><br =
class=3D"">> _______________________________________________<br =
class=3D"">> Devel mailing list<br
class=3D"">><span =
class=3D"Apple-converted-space"> </span><a =
href=3D"mailto:Devel@ovirt.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">Devel(a)ovirt.org</a><br
class=3D"">><span =
class=3D"Apple-converted-space"> </span><a =
href=3D"http://lists.ovirt.org/mailman/listinfo/devel" style=3D"color: =
purple; text-decoration: underline;" =
class=3D"">http://lists.ovirt.org/mailman/listinfo/devel<...
iv></div></div></div></blockquote></div><br
class=3D""></body></html>=
--Apple-Mail=_A58705BB-94F0-41B3-912E-C81871820D95--
9:50 a.m.
New subject: 答复: Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied
This is a multipart message in MIME format.
------=_NextPart_000_00D7_01D1E74D.001CF1D0
Content-Type: text/plain;
charset="utf-8"
Content-Transfer-Encoding: quoted-printable
=20
On 26 Jul 2016, at 08:02, lifuqiong <lifuqiong(a)cncloudsec.com> wrote:
=20
=20
I do make a mistake because I just print os.getuid() show the user root; =
but os.geteuid() show the current user is still vdsm;
=20
Anyway , I still don=E2=80=99t know how to debug vdsm, I cann=E2=80=99t =
log in to centos with user VDSM, because I don=E2=80=99t know the passwd =
of user vdsm and if I changed the password, the service vdsmd will =
cann=E2=80=99t start.
=20
the vdsm account is intentionally disabled for interactive login
=20
You told me =E2=80=9Cshould follow the devel setup wiki=E2=80=9D , =
what=E2=80=99s the true link of vdsm devel setup wiki ? I can=E2=80=99t =
get useful information in <http://ovirt.org/> ovirt.org or google.
=20
http://www.ovirt.org/develop/developer-guide/vdsm/developers/ has tips =
how to build from source and what packages are needed
Anything specific you=E2=80=99re troubleshooting?
=20
I do build the source from this instruction , but I want to set =
breakpoint to view each step and variable value to understand the =
vdsm=E2=80=99s code using python IDE such as Pycharm ,=20
=20
You know that we can implement this debug requirement in ovirt engine =
easily, but I can=E2=80=99t implement local debug in vdsm easily, =
because vdsm didn=E2=80=99t allow root to run or debug.
=20
Is there any debug instruction ?
=20
Thank you
Mark
=20
Thanks,
michal
=20
=20
Thank you
=20
=E5=8F=91=E4=BB=B6=E4=BA=BA: Michal Skrivanek =
[mailto:mskrivan@redhat.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2016=E5=B9=B47=E6=9C=8826=E6=97=A5 =
5:00
=E6=94=B6=E4=BB=B6=E4=BA=BA: lifuqiong
=E6=8A=84=E9=80=81: users; devel
=E4=B8=BB=E9=A2=98: Re: [ovirt-devel] Debug vdsm 4.0.0 report error: =
libvirt: XML-RPC error : Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
=20
On 25 Jul 2016, at 21:50, Sandro Bonazzola < =
<mailto:sbonazzo@redhat.com> sbonazzo(a)redhat.com> wrote:
Adding some people from virt team.
Il 23/Lug/2016 11:44, "lifuqiong" < <mailto:lifuqiong@cncloudsec.com>
=
lifuqiong(a)cncloudsec.com> ha scritto:
I debugged vdsm with PyCharm, And I logged on my Centos 7.2 with root, =
and get
an error as follows:
=20
Problem:
=20
Traceback (most recent call last):
File "/usr/share/vdsm/vdsm", line 149, in run
serve_clients(log)
File "/usr/share/vdsm/vdsm", line 104, in serve_clients
cif =3D clientIF.getInstance(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 204, in getInstance
cls._instance =3D clientIF(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 106, in __init__
secret.clear()
File "/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92,
in clear
con =3D libvirtconnection.get()
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get
password)
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection
return utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in =
retry
return func()
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
Investitate:
According to the traceback above, the code in libvirt.py as below, and =
os.geteuid() get =E2=80=980=E2=80=99 which shows the current user is =
root;
=20
vdsm is not supposed to be run under root user. For debugging you should =
follow the devel setup wiki and not change a regular host.=20
Depends what you modified, it's impossible to say from what you =
described....but a general advice is you simply don't do that:)
=20
def openAuth(uri, auth, flags=3D0):
#print os.geteuid()
ret =3D libvirtmod.virConnectOpenAuth(uri, auth, flags)
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
return virConnect(_obj=3Dret)
=20
[root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock
srwxrwx---. 1 root qemu 0 Jul 19 23:43 /var/run/libvirt/libvirt-sock
=20
According that, root should not get an Permission denied error ? But =
why?
=20
And I setenforce=3D0 , and still show Perssion denied error.
=20
What=E2=80=99s the reason? And how to solve it?
=20
Thank you.
_______________________________________________
Devel mailing list
<mailto:Devel@ovirt.org> Devel(a)ovirt.org
<http://lists.ovirt.org/mailman/listinfo/devel> =
http://lists.ovirt.org/mailman/listinfo/devel
=20
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link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><div><blockquote
=
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal><span lang=3DEN-US>On 26 Jul 2016, at 08:02, lifuqiong =
<<a =
href=3D"mailto:lifuqiong@cncloudsec.com">lifuqiong@cncloudsec.com</a>>=
wrote:<o:p></o:p></span></p></div><p
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I do make a mistake because I just print os.getuid() show the user =
root; but os.geteuid() show the current user is still vdsm;</span><span =
lang=3DEN-US><o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Anyway , I still don=E2=80=99t know how to debug vdsm, I =
cann=E2=80=99t log in to centos with user VDSM, because I don=E2=80=99t =
know the passwd of user vdsm and if I changed the password, the service =
vdsmd will cann=E2=80=99t start.</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div></blockquote><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p></div><p
=
class=3DMsoNormal><span lang=3DEN-US>the vdsm account is intentionally =
disabled for interactive
login<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US><br><br><o:p></o:p></span></p><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You told me =E2=80=9C</span><span lang=3DEN-US>should follow the =
devel setup wiki</span><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9D , what=E2=80=99s the true link of vdsm devel setup wiki =
? I can=E2=80=99t get useful information in<span =
class=3Dapple-converted-space> </span><a =
href=3D"http://ovirt.org/"><span =
style=3D'color:purple'>ovirt.org</span></a><span =
class=3Dapple-converted-space> </span>or google.</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p></div><p
=
class=3DMsoNormal><span lang=3DEN-US><a =
href=3D"http://www.ovirt.org/develop/developer-guide/vdsm/developers...
tp://www.ovirt.org/develop/developer-guide/vdsm/developers/</a>&... =
tips how to build from source and what packages are =
needed<o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US>Anything specific you=E2=80=99re =
troubleshooting?<o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'><o:p> </o:p></span></p><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 I do build the =
source from this instruction , but I want to set breakpoint to view each =
step and variable value to understand the vdsm=E2=80=99s code using =
python IDE such as Pycharm , <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You know that we can implement this debug requirement in ovirt engine =
easily, but I can=E2=80=99t implement local debug in vdsm easily, =
because vdsm didn=E2=80=99t allow root to run or =
debug.<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Is there any debug instruction
?<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you<o:p></o:p></span></p><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Mark<o:p></o:p></span></p><p
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US>Thanks,<o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US>michal<o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><br><br><o:p></o:p></span></p><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you</span><span =
lang=3DEN-US><o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><div
=
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><div><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></span></b><span =
class=3Dapple-converted-space><span lang=3DEN-US =
style=3D'font-size:10.0pt'> </span></span><span
lang=3DEN-US =
style=3D'font-size:10.0pt'>Michal Skrivanek [<a =
href=3D"mailto:mskrivan@redhat.com">mailto:mskrivan@redhat.com</a>]<span
=
class=3Dapple-converted-space> </span><br></span><b><span
=
style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span =
lang=3DEN-US>:</span></span></b><span =
class=3Dapple-converted-space><span lang=3DEN-US =
style=3D'font-size:10.0pt'> </span></span><span
lang=3DEN-US =
style=3D'font-size:10.0pt'>2016</span><span =
style=3D'font-size:10.0pt'>=E5=B9=B4<span =
lang=3DEN-US>7</span>=E6=9C=88<span
lang=3DEN-US>26</span>=E6=97=A5<span =
class=3Dapple-converted-space><span =
lang=3DEN-US> </span></span><span =
lang=3DEN-US>5:00<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span
=
lang=3DEN-US> </span></span><span =
lang=3DEN-US>lifuqiong<br></span><b>=E6=8A=84=E9=80=81<span =
lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span
=
lang=3DEN-US> </span></span><span lang=3DEN-US>users; =
devel<br></span><b>=E4=B8=BB=E9=A2=98<span =
lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span
=
lang=3DEN-US> </span></span><span lang=3DEN-US>Re:
[ovirt-devel] =
Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to =
connect socket to '/var/run/libvirt/libvirt-sock': Permission =
denied</span></span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div></div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div></div><div><p
=
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
lang=3DEN-US><br>On 25 Jul 2016, at 21:50, Sandro Bonazzola <<a =
href=3D"mailto:sbonazzo@redhat.com"><span =
style=3D'color:purple'>sbonazzo@redhat.com</span></a>> =
wrote:<o:p></o:p></span></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>Adding some people from virt
team.<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>Il 23/Lug/2016 11:44, "lifuqiong" <<a =
href=3D"mailto:lifuqiong@cncloudsec.com"><span =
style=3D'color:purple'>lifuqiong@cncloudsec.com</span></a>>
ha =
scritto:<br>><br>> I debugged vdsm with PyCharm, And I logged on
=
my Centos 7.2 with root, and get an error as =
follows:<br>><br>>
<br>><br>>
Problem:<br>><br>> =
<br>><br>> Traceback (most recent call =
last):<br>><br>> File
"/usr/share/vdsm/vdsm", =
line 149, in run<br>><br>> =
serve_clients(log)<br>><br>> File =
"/usr/share/vdsm/vdsm", line 104, in =
serve_clients<br>><br>> cif =3D
=
clientIF.getInstance(irs, log, scheduler)<br>><br>>
File =
"/usr/share/vdsm/clientIF.py", line 204, in =
getInstance<br>><br>>
cls._instance =3D =
clientIF(irs, log, scheduler)<br>><br>> File =
"/usr/share/vdsm/clientIF.py", line 106, in =
__init__<br>><br>> =
secret.clear()<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92, in clear<br>><br>> con =3D =
libvirtconnection.get()<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get<br>><br>> =
password)<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection<br>><br>>
return =
utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)<br>><br>> =
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", =
line 546, in retry<br>><br>>
return =
func()<br>><br>> File =
"/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth<br>><br>> if ret is
None:raise =
libvirtError('virConnectOpenAuth() failed')<br>><br>> =
libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission
denied<br>><br>> =
<br>><br>>
Investitate:<br>><br>> According to the =
traceback above, the code in libvirt.py as below, and os.geteuid() =
get </span>=E2=80=98<span lang=3DEN-US>0</span>=E2=80=99<span =
lang=3DEN-US> which shows the current user is =
root;<o:p></o:p></span></p></div></blockquote><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US>vdsm is not supposed to be run =
under root user. For debugging you should follow the devel setup wiki =
and not change a regular =
host. <o:p></o:p></span></p></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US>Depends what you modified, it's =
impossible to say from what you described....but a general advice is you =
simply don't do
that:)<br><br><br><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>><br>> <br>><br>>
def openAuth(uri, auth, =
flags=3D0):<br>><br>> =
#print =
os.geteuid()<br>><br>> ret =3D =
libvirtmod.virConnectOpenAuth(uri, auth, flags)<br>><br>> =
if ret is None:raise =
libvirtError('virConnectOpenAuth() failed')<br>><br>>
return =
virConnect(_obj=3Dret)<br>><br>>
<br>><br>> =
[root@server117 libvirt]# ll =
/var/run/libvirt/libvirt-sock<br>><br>> srwxrwx---. 1 root qemu
0 =
Jul 19 23:43 /var/run/libvirt/libvirt-sock<br>><br>> =
<br>><br>> According that, root should not get an
Permission =
denied error ? But why?<br>><br>>
<br>><br>> And I =
setenforce=3D0 , and still show Perssion denied error.<br>><br>>
=
<br>><br>> What</span>=E2=80=99<span
lang=3DEN-US>s the =
reason? And how to solve it?<br>><br>>
<br>><br>> =
Thank you.<br>><br>><br>> =
_______________________________________________<br>> Devel mailing =
list<br>><span
class=3Dapple-converted-space> </span><a =
href=3D"mailto:Devel@ovirt.org"><span =
style=3D'color:purple'>Devel@ovirt.org</span></a><br>><span
=
class=3Dapple-converted-space> </span><a =
href=3D"http://lists.ovirt.org/mailman/listinfo/devel"><span =
style=3D'color:purple'>http://lists.ovirt.org/mailman/listinfo...
n></a><o:p></o:p></span></p></div></div></div></div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p></div></body></html>
------=_NextPart_000_00D7_01D1E74D.001CF1D0--
10:37 a.m.
--Apple-Mail=_3CB844CF-51EF-43B2-815F-81DB2C6581E5
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=utf-8
On 26 Jul 2016, at 08:50, lifuqiong <lifuqiong(a)cncloudsec.com>
wrote:
=20
=20
On 26 Jul 2016, at 08:02, lifuqiong <lifuqiong(a)cncloudsec.com =
<mailto:lifuqiong@cncloudsec.com>> wrote:
=20
=20
I do make a mistake because I just print os.getuid() show the user =
root; but
os.geteuid() show the current user is still vdsm;
=20
Anyway , I still don=E2=80=99t know how to debug vdsm, I cann=E2=80=99t =
log in to
centos with user VDSM, because I don=E2=80=99t know the passwd =
of user vdsm and if I changed the password, the service vdsmd will =
cann=E2=80=99t start.
=20
the vdsm account is intentionally disabled for interactive login
=20
=20
=20
You told me =E2=80=9Cshould follow the devel setup wiki=E2=80=9D , =
what=E2=80=99s
the true link of vdsm devel setup wiki ? I can=E2=80=99t =
get useful information in ovirt.org <http://ovirt.org/> or google.
<http://www.ovirt.org/develop/developer-guide/vdsm/developers/> has tips =
how to build from source and what packages are needed
Anything specific you=E2=80=99re troubleshooting?
=20
I do build the source from this instruction , but I want to =
set
breakpoint to view each step and variable value to understand the =
vdsm=E2=80=99s code using python IDE such as Pycharm ,=20
=20
You know that we can implement this debug requirement in ovirt engine =
easily, but
I can=E2=80=99t implement local debug in vdsm easily, =
because vdsm didn=E2=80=99t allow root to run or debug.
=20
Is there any debug instruction ?
I don=E2=80=99t think it=E2=80=99s possible to debug it from PyCharm, or =
any IDE for that matter, easily.=20
It=E2=80=99s a multithreaded application, you can=E2=80=99t really set a =
breakpoint without affecting other functionality since some of the =
threads need to keep running
Best advice is to add a debugging/logging code in places you need, =
printing variables you=E2=80=99re interested in.
Thanks,
michal
=20
Thank you
Mark
=20
Thanks,
michal
=20
=20
=20
=20
Thank you
=20
=E5=8F=91=E4=BB=B6=E4=BA=BA: Michal Skrivanek =
[mailto:mskrivan@redhat.com
<mailto:mskrivan@redhat.com>]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:
2016=E5=B9=B47=E6=9C=8826=E6=97=A5=
5:00
=E6=94=B6=E4=BB=B6=E4=BA=BA: lifuqiong
=E6=8A=84=E9=80=81: users; devel
=E4=B8=BB=E9=A2=98: Re: [ovirt-devel] Debug vdsm 4.0.0 report error: =
libvirt:
XML-RPC error : Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
=20
=20
On 25 Jul 2016, at 21:50, Sandro Bonazzola <sbonazzo(a)redhat.com =
<mailto:sbonazzo@redhat.com>> wrote:
=20
Adding some people from virt team.
Il 23/Lug/2016 11:44, "lifuqiong" <lifuqiong(a)cncloudsec.com =
<mailto:lifuqiong@cncloudsec.com>> ha scritto:
>
> I debugged vdsm with PyCharm, And I logged on my Centos 7.2 with =
root, and
get an error as follows:
>
> =20
>
> Problem:
>
> =20
>
> Traceback (most recent call last):
>
> File "/usr/share/vdsm/vdsm", line 149, in run
>
> serve_clients(log)
>
> File "/usr/share/vdsm/vdsm", line 104, in serve_clients
>
> cif =3D clientIF.getInstance(irs, log, scheduler)
>
> File "/usr/share/vdsm/clientIF.py", line 204, in getInstance
>
> cls._instance =3D clientIF(irs, log, scheduler)
>
> File "/usr/share/vdsm/clientIF.py", line 106, in __init__
>
> secret.clear()
>
> File "/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92, in clear
>
> con =3D libvirtconnection.get()
>
> File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get
>
> password)
>
> File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection
>
> return utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)
>
> File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, =
in retry
>
> return func()
>
> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth
>
> if ret is None:raise libvirtError('virConnectOpenAuth() failed')
>
> libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
>
> =20
>
> Investitate:
>
> According to the traceback above, the code in libvirt.py as below, =
and
os.geteuid() get =E2=80=980=E2=80=99 which shows the current user =
is root;
=20
vdsm is not supposed to be run under root user. For debugging you =
should follow
the devel setup wiki and not change a regular host.=20
Depends what you modified, it's impossible to say from what you =
described....but a general advice is you simply don't do that:)
=20
=20
>
> =20
>
> def openAuth(uri, auth, flags=3D0):
>
> #print os.geteuid()
>
> ret =3D libvirtmod.virConnectOpenAuth(uri, auth, flags)
>
> if ret is None:raise libvirtError('virConnectOpenAuth() failed')
>
> return virConnect(_obj=3Dret)
>
> =20
>
> [root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock
>
> srwxrwx---. 1 root qemu 0 Jul 19 23:43 /var/run/libvirt/libvirt-sock
>
> =20
>
> According that, root should not get an Permission denied error ? But =
why?
>
> =20
>
> And I setenforce=3D0 , and still show Perssion denied error.
>
> =20
>
> What=E2=80=99s the reason? And how to solve it?
>
> =20
>
> Thank you.
>
>
> _______________________________________________
> Devel mailing list
> Devel(a)ovirt.org <mailto:Devel@ovirt.org>
> http://lists.ovirt.org/mailman/listinfo/devel =
<http://lists.ovirt.org/mailman/listinfo/devel>
--Apple-Mail=_3CB844CF-51EF-43B2-815F-81DB2C6581E5
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
charset=utf-8
<html><head><meta http-equiv=3D"Content-Type"
content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><br class=3D""><div><blockquote
type=3D"cite" class=3D""><div =
class=3D"">On 26 Jul 2016, at 08:50, lifuqiong <<a =
href=3D"mailto:lifuqiong@cncloudsec.com" =
class=3D"">lifuqiong(a)cncloudsec.com</a>&gt;
wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div
=
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D""><o:p
class=3D""> </o:p></span></div><div =
class=3D""><blockquote style=3D"margin-top: 5pt; margin-bottom:
5pt;" =
class=3D""><div class=3D""><div style=3D"margin: 0cm
0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" class=3D"">On 26 Jul 2016, at 08:02, lifuqiong
<<a =
href=3D"mailto:lifuqiong@cncloudsec.com" style=3D"color: purple; =
text-decoration: underline;"
class=3D"">lifuqiong(a)cncloudsec.com</a>&gt; =
wrote:<o:p
class=3D""></o:p></span></div></div><div
style=3D"margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D""><o:p
=
class=3D""> </o:p></span></div><div
class=3D""><div class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
style=3D"font-size: =
10.5pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""> </span><span lang=3D"EN-US"
class=3D""><o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">I do make a =
mistake because I just print os.getuid() show the user root; but =
os.geteuid() show the current user is still vdsm;</span><span =
lang=3D"EN-US" class=3D""><o:p
class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
style=3D"font-size: 10.5pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D""> </span><span
lang=3D"EN-US" =
class=3D""><o:p
class=3D""></o:p></span></div></div><div
class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
style=3D"font-size: =
10.5pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Anyway , I still don=E2=80=99t know how to debug vdsm, I =
cann=E2=80=99t log in to centos with user VDSM, because I don=E2=80=99t =
know the passwd of user vdsm and if I changed the password, the service =
vdsmd will cann=E2=80=99t start.</span><span lang=3D"EN-US" =
class=3D""><o:p =
class=3D""></o:p></span></div></div></div></blockquote><div
=
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D""><o:p
class=3D""> </o:p></span></div></div><div
=
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
class=3D"">the vdsm =
account is intentionally disabled for interactive login<o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D""><br
class=3D""><br =
class=3D""><o:p
class=3D""></o:p></span></div><div
class=3D""><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
style=3D"font-size: 10.5pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D""> </span><span
lang=3D"EN-US" =
class=3D""><o:p
class=3D""></o:p></span></div></div><div
class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
style=3D"font-size: =
10.5pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">You told me =E2=80=9C</span><span
lang=3D"EN-US" =
class=3D"">should follow the devel setup wiki</span><span
lang=3D"EN-US" =
style=3D"font-size: 10.5pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">=E2=80=9D , what=E2=80=99s the true link
=
of vdsm devel setup wiki ? I can=E2=80=99t get useful information =
in<span class=3D"apple-converted-space"> </span><a =
href=3D"http://ovirt.org/" style=3D"color: purple; text-decoration: =
underline;" class=3D""><span style=3D"color: purple;" =
class=3D"">ovirt.org</span></a><span =
class=3D"apple-converted-space"> </span>or
google.</span><span =
lang=3D"EN-US" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div
class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
class=3D""><o:p =
class=3D""> </o:p></span></div></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D""><a =
href=3D"http://www.ovirt.org/develop/developer-guide/vdsm/developers... =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">http://www.ovirt.org/develop/developer-guide/vdsm...
a> has tips how to build from source and what packages are =
needed<o:p
class=3D""></o:p></span></div></div><div
class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
class=3D"">Anything =
specific you=E2=80=99re troubleshooting?<o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"color: rgb(31, 73,
125);" =
class=3D""><o:p
class=3D""> </o:p></span></div><div
style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">
I do build =
the source from this instruction , but I want to set breakpoint to view =
each step and variable value to understand the vdsm=E2=80=99s code using =
python IDE such as Pycharm ,<span =
class=3D"Apple-converted-space"> </span><o:p =
class=3D""></o:p></span></div><div style=3D"margin:
0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">You know that
=
we can implement this debug requirement in ovirt engine easily, but I =
can=E2=80=99t implement local debug in vdsm easily, because vdsm =
didn=E2=80=99t allow root to run or debug.<o:p =
class=3D""></o:p></span></div><div style=3D"margin:
0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Is there any
=
debug instruction
?</span></div></div></div></div></blockquote><div><br
=
class=3D""></div>I don=E2=80=99t think it=E2=80=99s possible to debug
it =
from PyCharm, or any IDE for that matter,
easily. </div><div>It=E2=80=
=99s a multithreaded application, you can=E2=80=99t really set a =
breakpoint without affecting other functionality since some of the =
threads need to keep running</div><div>Best advice is to add a =
debugging/logging code in places you need, printing variables you=E2=80=99=
re interested in.</div><div><br =
class=3D""></div><div>Thanks,</div><div>michal</div><div><br
=
class=3D""><blockquote type=3D"cite"
class=3D""><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div class=3D""><div style=3D"margin: 0cm 0cm
0.0001pt; font-size: =
12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
style=3D"font-size: 10.5pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D""><o:p
class=3D""></o:p></span></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
style=3D"font-size: =
10.5pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p
class=3D""> </o:p></span></div><div
style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Thank
you<o:p =
class=3D""></o:p></span></div><div style=3D"margin:
0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Mark<o:p =
class=3D""></o:p></span></div><div style=3D"margin:
0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
=
lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D""> </o:p></span></div></div><div
class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US" =
class=3D"">Thanks,<o:p
class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D"">michal<o:p
class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D""><br class=3D""><br
class=3D""><o:p =
class=3D""></o:p></span></div><div
class=3D""><div class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
style=3D"font-size: =
10.5pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""> </span><span lang=3D"EN-US"
class=3D""><o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""> </span><span lang=3D"EN-US"
class=3D""><o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Thank =
you</span><span lang=3D"EN-US" class=3D""><o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 10.5pt;
font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""> </span><span lang=3D"EN-US"
class=3D""><o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div =
style=3D"border-style: solid none none; border-top-color: rgb(181, 196, =
223); border-top-width: 1pt; padding: 3pt 0cm 0cm;" class=3D""><div
=
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><b
class=3D""><span =
style=3D"font-size: 10pt;"
class=3D"">=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3D"EN-US"
class=3D"">:</span></span></b><span =
class=3D"apple-converted-space"><span lang=3D"EN-US"
style=3D"font-size: =
10pt;" class=3D""> </span></span><span
lang=3D"EN-US" =
style=3D"font-size: 10pt;" class=3D"">Michal Skrivanek [<a =
href=3D"mailto:mskrivan@redhat.com" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">mailto:mskrivan@redhat.com</a>]<span =
class=3D"apple-converted-space"> </span><br
class=3D""></span><b =
class=3D""><span style=3D"font-size: 10pt;"
class=3D"">=E5=8F=91=E9=80=81=E6=
=97=B6=E9=97=B4<span lang=3D"EN-US"
class=3D"">:</span></span></b><span =
class=3D"apple-converted-space"><span lang=3D"EN-US"
style=3D"font-size: =
10pt;" class=3D""> </span></span><span
lang=3D"EN-US" =
style=3D"font-size: 10pt;" class=3D"">2016</span><span
style=3D"font-size:=
10pt;" class=3D"">=E5=B9=B4<span lang=3D"EN-US" =
class=3D"">7</span>=E6=9C=88<span lang=3D"EN-US" =
class=3D"">26</span>=E6=97=A5<span
class=3D"apple-converted-space"><span =
lang=3D"EN-US"
class=3D""> </span></span><span
lang=3D"EN-US" =
class=3D"">5:00<br class=3D""></span><b
class=3D"">=E6=94=B6=E4=BB=B6=E4=BA=
=BA<span lang=3D"EN-US"
class=3D"">:</span></b><span =
class=3D"apple-converted-space"><span lang=3D"EN-US" =
class=3D""> </span></span><span
lang=3D"EN-US" =
class=3D"">lifuqiong<br class=3D""></span><b
class=3D"">=E6=8A=84=E9=80=81=
<span lang=3D"EN-US" class=3D"">:</span></b><span
=
class=3D"apple-converted-space"><span lang=3D"EN-US" =
class=3D""> </span></span><span
lang=3D"EN-US" class=3D"">users; =
devel<br class=3D""></span><b
class=3D"">=E4=B8=BB=E9=A2=98<span =
lang=3D"EN-US" class=3D"">:</span></b><span =
class=3D"apple-converted-space"><span lang=3D"EN-US" =
class=3D""> </span></span><span
lang=3D"EN-US" class=3D"">Re: =
[ovirt-devel] Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : =
Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission =
denied</span></span><span lang=3D"EN-US"
class=3D""><o:p =
class=3D""></o:p></span></div></div></div></div><div
class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
class=3D""> <o:p=
class=3D""></o:p></span></div></div><div
class=3D""><div class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
=E5=AE=8B=E4=BD=93;" class=3D""><span lang=3D"EN-US"
class=3D""> <o:p=
class=3D""></o:p></span></div></div></div><div
class=3D""><p =
class=3D"MsoNormal" style=3D"margin: 0cm 0cm 12pt; font-size: 12pt; =
font-family: =E5=AE=8B=E4=BD=93;"><span lang=3D"EN-US"
class=3D""><br =
class=3D"">On 25 Jul 2016, at 21:50, Sandro Bonazzola <<a =
href=3D"mailto:sbonazzo@redhat.com" style=3D"color: purple; =
text-decoration: underline;" class=3D""><span style=3D"color:
purple;" =
class=3D"">sbonazzo(a)redhat.com</span></a>&gt; wrote:<o:p
=
class=3D""></o:p></span></p></div><blockquote
style=3D"margin-top: 5pt; =
margin-bottom: 5pt;" class=3D""><div class=3D""><div
style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D"">Adding
some people from virt =
team.<o:p class=3D""></o:p></span></div><div
style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US" class=3D"">Il
23/Lug/2016 11:44, =
"lifuqiong" <<a href=3D"mailto:lifuqiong@cncloudsec.com" =
style=3D"color: purple; text-decoration: underline;"
class=3D""><span =
style=3D"color: purple;" =
class=3D"">lifuqiong(a)cncloudsec.com</span></a>&gt; ha
scritto:<br =
class=3D"">><br class=3D"">> I debugged vdsm
with PyCharm, And I =
logged on my Centos 7.2 with root, and get an error as follows:<br =
class=3D"">><br class=3D"">> <br
class=3D"">><br =
class=3D"">> Problem:<br class=3D"">><br
class=3D"">> <br =
class=3D"">><br class=3D"">> Traceback (most
recent call last):<br =
class=3D"">><br class=3D"">> File
"/usr/share/vdsm/vdsm", =
line 149, in run<br class=3D"">><br
class=3D"">> =
serve_clients(log)<br
class=3D"">><br =
class=3D"">> File "/usr/share/vdsm/vdsm", line
104, in =
serve_clients<br class=3D"">><br
class=3D"">> =
cif =3D clientIF.getInstance(irs, log, scheduler)<br
class=3D"">><br =
class=3D"">> File "/usr/share/vdsm/clientIF.py",
line 204, in =
getInstance<br class=3D"">><br class=3D"">>
=
cls._instance =3D clientIF(irs, log, scheduler)<br
class=3D"">><br =
class=3D"">> File "/usr/share/vdsm/clientIF.py",
line 106, in =
__init__<br class=3D"">><br class=3D"">>
=
secret.clear()<br class=3D"">><br
class=3D"">> File =
"/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line 92, in =
clear<br class=3D"">><br class=3D"">>
con =3D =
libvirtconnection.get()<br class=3D"">><br
class=3D"">> =
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line =
163, in get<br class=3D"">><br class=3D"">>
=
password)<br class=3D"">><br class=3D"">>
File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 99, =
in open_connection<br class=3D"">><br
class=3D"">> =
return utils.retry(libvirtOpen, timeout=3D10, =
sleep=3D0.2)<br class=3D"">><br class=3D"">>
File =
"/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in retry<br =
class=3D"">><br class=3D"">>
return func()<br =
class=3D"">><br class=3D"">> File =
"/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth<br class=3D"">><br class=3D"">>
if ret =
is None:raise libvirtError('virConnectOpenAuth() failed')<br =
class=3D"">><br class=3D"">> libvirtError:
Failed to connect =
socket to '/var/run/libvirt/libvirt-sock': Permission denied<br =
class=3D"">><br class=3D"">> <br
class=3D"">><br =
class=3D"">> Investitate:<br class=3D"">><br
class=3D"">> =
According to the traceback above, the code in libvirt.py as below, and =
os.geteuid() get<span =
class=3D"Apple-converted-space"> </span></span>=E2=80=98<span
=
lang=3D"EN-US" class=3D"">0</span>=E2=80=99<span
lang=3D"EN-US" =
class=3D""><span
class=3D"Apple-converted-space"> </span>which =
shows the current user is root;<o:p =
class=3D""></o:p></span></div></div></blockquote><div
class=3D""><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D""> <o:p
class=3D""></o:p></span></div></div></div><div
=
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D"">vdsm is not supposed to be run under root user. For debugging =
you should follow the devel setup wiki and not change a regular =
host. <o:p
class=3D""></o:p></span></div></div><div
class=3D""><div =
class=3D""><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;
=
font-family: =E5=AE=8B=E4=BD=93;" class=3D""><span
lang=3D"EN-US" =
class=3D"">Depends what you modified, it's impossible to say from what =
you described....but a general advice is you simply don't do that:)<br =
class=3D""><br class=3D""><br
class=3D""><o:p =
class=3D""></o:p></span></div></div><div
class=3D""><div style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;" =
class=3D""><span lang=3D"EN-US"
class=3D"">><br class=3D"">> =
<br class=3D"">><br class=3D"">>
def openAuth(uri, auth, =
flags=3D0):<br class=3D"">><br class=3D"">>
=
#print
os.geteuid()<br =
class=3D"">><br class=3D"">>
ret =3D =
libvirtmod.virConnectOpenAuth(uri, auth, flags)<br
class=3D"">><br =
class=3D"">> if ret is None:raise =
libvirtError('virConnectOpenAuth() failed')<br
class=3D"">><br =
class=3D"">> return virConnect(_obj=3Dret)<br
class=3D"">><br =
class=3D"">> <br class=3D"">><br
class=3D"">> =
[root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock<br =
class=3D"">><br class=3D"">> srwxrwx---. 1 root
qemu 0 Jul 19 =
23:43 /var/run/libvirt/libvirt-sock<br class=3D"">><br
class=3D"">> =
<br class=3D"">><br class=3D"">>
According that, root should =
not get an Permission denied error ? But why?<br class=3D"">><br
=
class=3D"">> <br class=3D"">><br
class=3D"">> And I =
setenforce=3D0 , and still show Perssion denied error.<br =
class=3D"">><br class=3D"">> <br
class=3D"">><br =
class=3D"">> What</span>=E2=80=99<span
lang=3D"EN-US" class=3D"">s =
the reason? And how to solve it?<br class=3D"">><br
class=3D"">> =
<br class=3D"">><br class=3D"">>
Thank you.<br =
class=3D"">><br class=3D"">><br
class=3D"">> =
_______________________________________________<br class=3D"">>
Devel =
mailing list<br class=3D"">><span =
class=3D"apple-converted-space"> </span><a =
href=3D"mailto:Devel@ovirt.org" style=3D"color: purple; text-decoration: =
underline;" class=3D""><span style=3D"color: purple;" =
class=3D"">Devel(a)ovirt.org</span></a><br
class=3D"">><span =
class=3D"apple-converted-space"> </span><a =
href=3D"http://lists.ovirt.org/mailman/listinfo/devel" style=3D"color: =
purple; text-decoration: underline;" class=3D""><span
style=3D"color: =
purple;" =
class=3D"">http://lists.ovirt.org/mailman/listinfo/devel<...
</div></div></div></div></div></div></div></blockquote></div><br
=
class=3D""></body></html>=
--Apple-Mail=_3CB844CF-51EF-43B2-815F-81DB2C6581E5--
11:08 a.m.
This is a multipart message in MIME format.
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Content-Type: text/plain;
charset="utf-8"
Content-Transfer-Encoding: quoted-printable
=20
=20
I do make a mistake because I just print os.getuid() show the user root; =
but os.geteuid() show the current user is still vdsm;
=20
Anyway , I still don=E2=80=99t know how to debug vdsm, I cann=E2=80=99t =
log in to centos with user VDSM, because I don=E2=80=99t know the passwd =
of user vdsm and if I changed the password, the service vdsmd will =
cann=E2=80=99t start.
=20
the vdsm account is intentionally disabled for interactive login
=20
You told me =E2=80=9Cshould follow the devel setup wiki=E2=80=9D , =
what=E2=80=99s the true link of vdsm devel setup wiki ? I can=E2=80=99t =
get useful information in <http://ovirt.org/> ovirt.org or google.
=20
<http://www.ovirt.org/develop/developer-guide/vdsm/developers/> =
http://www.ovirt.org/develop/developer-guide/vdsm/developers/ has tips =
how to build from source and what packages are needed
Anything specific you=E2=80=99re troubleshooting?
=20
I do build the source from this instruction , but I want to set =
breakpoint to view each step and variable value to understand the =
vdsm=E2=80=99s code using python IDE such as Pycharm ,=20
=20
You know that we can implement this debug requirement in ovirt engine =
easily, but I can=E2=80=99t implement local debug in vdsm easily, =
because vdsm didn=E2=80=99t allow root to run or debug.
=20
Is there any debug instruction ?
=20
I don=E2=80=99t think it=E2=80=99s possible to debug it from PyCharm, or =
any IDE for that matter, easily.=20
It=E2=80=99s a multithreaded application, you can=E2=80=99t really set a =
breakpoint without affecting other functionality since some of the =
threads need to keep running
Best advice is to add a debugging/logging code in places you need, =
printing variables you=E2=80=99re interested in.
=20
I know it=E2=80=99s a multithreaded application , and debug =
vdsm is a very difficult job, but without debug, I don=E2=80=99t know =
which code I should replace or logging, Is there any remote debug =
solution like ovirt engine? I found that=20
I can do remote debug in simple python application , but I =
didn=E2=80=99t success yet remote debugging vdsm.=20
=20
Now one of our case I want to consider using ovirt as our =
solution , we may do little change over ovirt. but as described above, =
without debug , we can hardly understand vdsm clearly and cannot do =
correctly code change.
Is there some good advice ?
=20
Thank you
Mark
Thanks,
michal
=20
Thank you
Mark
=20
Thanks,
michal
=20
=20
Thank you
=20
=E5=8F=91=E4=BB=B6=E4=BA=BA: Michal Skrivanek [ =
<mailto:mskrivan@redhat.com> mailto:mskrivan@redhat.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2016=E5=B9=B47=E6=9C=8826=E6=97=A5 =
5:00
=E6=94=B6=E4=BB=B6=E4=BA=BA: lifuqiong
=E6=8A=84=E9=80=81: users; devel
=E4=B8=BB=E9=A2=98: Re: [ovirt-devel] Debug vdsm 4.0.0 report error: =
libvirt: XML-RPC error : Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
=20
On 25 Jul 2016, at 21:50, Sandro Bonazzola < =
<mailto:sbonazzo@redhat.com> sbonazzo(a)redhat.com> wrote:
Adding some people from virt team.
Il 23/Lug/2016 11:44, "lifuqiong" < <mailto:lifuqiong@cncloudsec.com>
=
lifuqiong(a)cncloudsec.com> ha scritto:
I debugged vdsm with PyCharm, And I logged on my Centos 7.2 with root, =
and get
an error as follows:
=20
Problem:
=20
Traceback (most recent call last):
File "/usr/share/vdsm/vdsm", line 149, in run
serve_clients(log)
File "/usr/share/vdsm/vdsm", line 104, in serve_clients
cif =3D clientIF.getInstance(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 204, in getInstance
cls._instance =3D clientIF(irs, log, scheduler)
File "/usr/share/vdsm/clientIF.py", line 106, in __init__
secret.clear()
File "/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92,
in clear
con =3D libvirtconnection.get()
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get
password)
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection
return utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 546, in =
retry
return func()
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission denied
=20
Investitate:
According to the traceback above, the code in libvirt.py as below, and =
os.geteuid() get =E2=80=980=E2=80=99 which shows the current user is =
root;
=20
vdsm is not supposed to be run under root user. For debugging you should =
follow the devel setup wiki and not change a regular host.=20
Depends what you modified, it's impossible to say from what you =
described....but a general advice is you simply don't do that:)
=20
def openAuth(uri, auth, flags=3D0):
#print os.geteuid()
ret =3D libvirtmod.virConnectOpenAuth(uri, auth, flags)
if ret is None:raise libvirtError('virConnectOpenAuth() failed')
return virConnect(_obj=3Dret)
=20
[root@server117 libvirt]# ll /var/run/libvirt/libvirt-sock
srwxrwx---. 1 root qemu 0 Jul 19 23:43 /var/run/libvirt/libvirt-sock
=20
According that, root should not get an Permission denied error ? But =
why?
=20
And I setenforce=3D0 , and still show Perssion denied error.
=20
What=E2=80=99s the reason? And how to solve it?
=20
Thank you.
_______________________________________________
Devel mailing list
<mailto:Devel@ovirt.org> Devel(a)ovirt.org
<http://lists.ovirt.org/mailman/listinfo/devel> =
http://lists.ovirt.org/mailman/listinfo/devel
=20
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link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p><div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I do make a mistake because I just print os.getuid() show the user =
root; but os.geteuid() show the current user is still vdsm;</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Anyway , I still don=E2=80=99t know how to debug vdsm, I =
cann=E2=80=99t log in to centos with user VDSM, because I don=E2=80=99t =
know the passwd of user vdsm and if I changed the password, the service =
vdsmd will cann=E2=80=99t start.</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US>the vdsm account is intentionally =
disabled for interactive
login<o:p></o:p></span></p></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><br><br><br><o:p></o:p></span></p></div><div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You told me =E2=80=9C</span><span lang=3DEN-US>should follow the =
devel setup wiki</span><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9D , what=E2=80=99s the true link of vdsm devel setup wiki =
? I can=E2=80=99t get useful information in<span =
class=3Dapple-converted-space> </span><a =
href=3D"http://ovirt.org/"><span =
style=3D'color:purple'>ovirt.org</span></a><span =
class=3Dapple-converted-space> </span>or google.</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US><a =
href=3D"http://www.ovirt.org/develop/developer-guide/vdsm/developers...
pan =
style=3D'color:purple'>http://www.ovirt.org/develop/developer-...
developers/</span></a> has tips how to build from source and what =
packages are
needed<o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US>Anything specific =
you</span>=E2=80=99<span lang=3DEN-US>re =
troubleshooting?<o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>
I do build the =
source from this instruction , but I want to set breakpoint to view each =
step and variable value to understand the vdsm=E2=80=99s code using =
python IDE such as Pycharm ,<span =
class=3Dapple-converted-space> </span></span><span =
lang=3DEN-US><o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You know that we can implement this debug requirement in ovirt engine =
easily, but I can=E2=80=99t implement local debug in vdsm easily, =
because vdsm didn=E2=80=99t allow root to run or debug.</span><span =
lang=3DEN-US><o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Is there any debug instruction ?</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p></div><p
=
class=3DMsoNormal><span lang=3DEN-US>I don=E2=80=99t think it=E2=80=99s =
possible to debug it from PyCharm, or any IDE for that matter, =
easily. <o:p></o:p></span></p><div><p
class=3DMsoNormal><span =
lang=3DEN-US>It=E2=80=99s a multithreaded application, you can=E2=80=99t =
really set a breakpoint without affecting other functionality since some =
of the threads need to keep
running<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Best advice is to add a =
debugging/logging code in places you need, printing variables =
you=E2=80=99re interested
in.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'><o:p> </o:p></span></p><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 I know it=E2=80=99s =
a multithreaded application , and debug vdsm is a very difficult job, =
but without debug, I don=E2=80=99t know which code I should replace or =
logging,=C2=A0 =C2=A0Is there any remote debug solution like ovirt =
engine? =C2=A0I found that <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I can do remote debug in simple python application , but I =
didn=E2=80=99t success yet remote debugging vdsm. =
<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Now one of our case =
I want to consider using ovirt as our solution , we may do little change =
over ovirt. but as described above, without debug , we can hardly =
understand vdsm clearly and cannot do correctly code =
change.<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Is there some good advice ?<o:p></o:p></span></p><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Thank =
you<o:p></o:p></span></p><p class=3DMsoNormal><span
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
Mark<o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US>Thanks,<o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US>michal<o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><br><br><o:p></o:p></span></p><div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you</span><span =
lang=3DEN-US><o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Mark</span><span
lang=3DEN-US><o:p></o:p></span></p></div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US>Thanks,<o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US>michal<o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><br><br><br><o:p></o:p></span></p></div><div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> </span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div><div><div
=
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><div><div><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></span></b><span =
class=3Dapple-converted-space><span lang=3DEN-US =
style=3D'font-size:10.0pt'> </span></span><span
lang=3DEN-US =
style=3D'font-size:10.0pt'>Michal Skrivanek [<a =
href=3D"mailto:mskrivan@redhat.com"><span =
style=3D'color:purple'>mailto:mskrivan@redhat.com</span></a>]<span
=
class=3Dapple-converted-space> </span><br></span><b><span
=
style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span =
lang=3DEN-US>:</span></span></b><span =
class=3Dapple-converted-space><span lang=3DEN-US =
style=3D'font-size:10.0pt'> </span></span><span
lang=3DEN-US =
style=3D'font-size:10.0pt'>2016</span><span =
style=3D'font-size:10.0pt'>=E5=B9=B4<span =
lang=3DEN-US>7</span>=E6=9C=88<span
lang=3DEN-US>26</span>=E6=97=A5<span =
class=3Dapple-converted-space><span =
lang=3DEN-US> </span></span><span =
lang=3DEN-US>5:00<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span
=
lang=3DEN-US> </span></span><span =
lang=3DEN-US>lifuqiong<br></span><b>=E6=8A=84=E9=80=81<span =
lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span
=
lang=3DEN-US> </span></span><span lang=3DEN-US>users; =
devel<br></span><b>=E4=B8=BB=E9=A2=98<span =
lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span
=
lang=3DEN-US> </span></span><span lang=3DEN-US>Re:
[ovirt-devel] =
Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to =
connect socket to '/var/run/libvirt/libvirt-sock': Permission =
denied</span></span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div></div></div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div></div></div><div><p
=
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
lang=3DEN-US><br>On 25 Jul 2016, at 21:50, Sandro Bonazzola <<a =
href=3D"mailto:sbonazzo@redhat.com"><span =
style=3D'color:purple'>sbonazzo@redhat.com</span></a>> =
wrote:<o:p></o:p></span></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Adding some people from virt =
team.<o:p></o:p></span></p></div><div><p
class=3DMsoNormal><span =
lang=3DEN-US>Il 23/Lug/2016 11:44, "lifuqiong" <<a =
href=3D"mailto:lifuqiong@cncloudsec.com"><span =
style=3D'color:purple'>lifuqiong@cncloudsec.com</span></a>>
ha =
scritto:<br>><br>> I debugged vdsm with PyCharm, And I logged on
=
my Centos 7.2 with root, and get an error as =
follows:<br>><br>>
<br>><br>>
Problem:<br>><br>> =
<br>><br>> Traceback (most recent call =
last):<br>><br>> File
"/usr/share/vdsm/vdsm", =
line 149, in run<br>><br>> =
serve_clients(log)<br>><br>> File =
"/usr/share/vdsm/vdsm", line 104, in =
serve_clients<br>><br>> cif =3D
=
clientIF.getInstance(irs, log, scheduler)<br>><br>>
File =
"/usr/share/vdsm/clientIF.py", line 204, in =
getInstance<br>><br>>
cls._instance =3D =
clientIF(irs, log, scheduler)<br>><br>> File =
"/usr/share/vdsm/clientIF.py", line 106, in =
__init__<br>><br>> =
secret.clear()<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/virt/secret.py", line =
92, in clear<br>><br>> con =3D =
libvirtconnection.get()<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 163, in get<br>><br>> =
password)<br>><br>> File =
"/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", =
line 99, in open_connection<br>><br>>
return =
utils.retry(libvirtOpen, timeout=3D10, sleep=3D0.2)<br>><br>> =
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", =
line 546, in retry<br>><br>>
return =
func()<br>><br>> File =
"/usr/lib64/python2.7/site-packages/libvirt.py", line 105, in =
openAuth<br>><br>> if ret is
None:raise =
libvirtError('virConnectOpenAuth() failed')<br>><br>> =
libvirtError: Failed to connect socket to =
'/var/run/libvirt/libvirt-sock': Permission
denied<br>><br>> =
<br>><br>>
Investitate:<br>><br>> According to the =
traceback above, the code in libvirt.py as below, and os.geteuid() =
get<span =
class=3Dapple-converted-space> </span></span>=E2=80=98<span =
lang=3DEN-US>0</span>=E2=80=99<span class=3Dapple-converted-space><span
=
lang=3DEN-US> </span></span><span lang=3DEN-US>which shows
the =
current user is =
root;<o:p></o:p></span></p></div></div></blockquote><div><div><div><p
=
class=3DMsoNormal><span =
lang=3DEN-US> <o:p></o:p></span></p></div></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US>vdsm is not supposed to be run =
under root user. For debugging you should follow the devel setup wiki =
and not change a regular =
host. <o:p></o:p></span></p></div></div><div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US>Depends what you modified, it's =
impossible to say from what you described....but a general advice is you =
simply don't do =
that:)<br><br><br><br><o:p></o:p></span></p></div></div><div><div><p
=
class=3DMsoNormal><span lang=3DEN-US>><br>>
<br>><br>> =
def openAuth(uri, auth, flags=3D0):<br>><br>> =
#print =
os.geteuid()<br>><br>> ret =3D =
libvirtmod.virConnectOpenAuth(uri, auth, flags)<br>><br>> =
if ret is None:raise =
libvirtError('virConnectOpenAuth() failed')<br>><br>>
return =
virConnect(_obj=3Dret)<br>><br>>
<br>><br>> =
[root@server117 libvirt]# ll =
/var/run/libvirt/libvirt-sock<br>><br>> srwxrwx---. 1 root qemu
0 =
Jul 19 23:43 /var/run/libvirt/libvirt-sock<br>><br>> =
<br>><br>> According that, root should not get an
Permission =
denied error ? But why?<br>><br>>
<br>><br>> And I =
setenforce=3D0 , and still show Perssion denied error.<br>><br>>
=
<br>><br>> What</span>=E2=80=99<span
lang=3DEN-US>s the =
reason? And how to solve it?<br>><br>>
<br>><br>> =
Thank you.<br>><br>><br>> =
_______________________________________________<br>> Devel mailing =
list<br>><span
class=3Dapple-converted-space> </span><a =
href=3D"mailto:Devel@ovirt.org"><span =
style=3D'color:purple'>Devel@ovirt.org</span></a><br>><span
=
class=3Dapple-converted-space> </span><a =
href=3D"http://lists.ovirt.org/mailman/listinfo/devel"><span =
style=3D'color:purple'>http://lists.ovirt.org/mailman/listinfo...
n></a><o:p></o:p></span></p></div></div></div></div></div></div></div><p
=
class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p></div></body></html>
------=_NextPart_000_00EB_01D1E757.F5CF4E70--
4:46 p.m.
"lifuqiong" <lifuqiong(a)cncloudsec.com> writes:
I know it’s a multithreaded application , and debug vdsm is
a very
difficult job, but without debug, I don’t know which code I should
replace or logging, Is there any remote debug solution like ovirt
engine? I found that
I can do remote debug in simple python application , but I didn’t success yet remote
debugging vdsm.
As Michal mentioned, making a breakpoint in Vdsm may break things due to
the stopped execution of the given thread. Inserting logging messages
to proper places of the code, where you need to get some information
about the runtime state, is typically much simpler and good enough
solution.
If you still want to try more interactive approach and need to access
`vdsm' user, you can change the login shell of `vdsm' account to /bin/sh
and then use `su - vdsm' from root account. But I don't recommend doing
that on any production system.
Now one of our case I want to consider using ovirt as our
solution ,
we may do little change over ovirt. but as described above, without
debug , we can hardly understand vdsm clearly and cannot do correctly
code change.
Is there some good advice ?
If you want to study Vdsm runtime execution, read the logs, there's
plenty of information there. When you are interested in a particular
place in the source code, where you intend to perform the changes, and
some information is missing, simply add your own debugging calls there,
restart Vdsm and watch the log. I do it all the time and it works. :-)
5:01 p.m.
New subject: Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied
----- Original Message -----
From: "Milan Zamazal" <mzamazal(a)redhat.com>
To: "lifuqiong" <lifuqiong(a)cncloudsec.com>
Cc: devel(a)ovirt.org
Sent: Tuesday, July 26, 2016 3:46:42 PM
Subject: Re: [ovirt-devel] Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed
to connect socket to
'/var/run/libvirt/libvirt-sock': Permission denied
"lifuqiong" <lifuqiong(a)cncloudsec.com> writes:
> I know it’s a multithreaded application , and debug vdsm is a very
> difficult job, but without debug, I don’t know which code I
> should
> replace or logging, Is there any remote debug solution like ovirt
> engine? I found that
>
> I can do remote debug in simple python application , but I didn’t success
> yet remote debugging vdsm.
As Michal mentioned, making a breakpoint in Vdsm may break things due to
the stopped execution of the given thread. Inserting logging messages
to proper places of the code, where you need to get some information
about the runtime state, is typically much simpler and good enough
solution.
Additionally, another option is to use our manhole integration:
https://pypi.python.org/pypi/manhole
this is available on ovirt-4.0.z
check manhole_enable in [devel] section.
As the name hints, this should not be enabled in production settings.
Bests,
--
Francesco Romani
RedHat Engineering Virtualization R & D
Phone: 8261328
IRC: fromani
3040
days inactive
3043
days old
9 comments
5 participants
participants (5)
-
Francesco Romani -
lifuqiong -
Michal Skrivanek -
Milan Zamazal -
Sandro Bonazzola