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

23 Jul 2016

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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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</o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN 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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Debug vdsm 4.0.0 report error: libvirt: XML-RPC error : Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied

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Sandro Bonazzola

Michal Skrivanek

lifuqiong

Michal Skrivanek

lifuqiong

Michal Skrivanek

lifuqiong

Milan Zamazal

Francesco Romani

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