[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

[Sandro Bonazzola]

Adding some people from virt team.

Il 23/Lug/2016 11:44, "lifuqiong" <lifuqiong at 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 at 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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