> On 26 Jul 2016, at 08:50, lifuqiong <[email protected]> wrote: > > > On 26 Jul 2016, at 08:02, lifuqiong <[email protected] > <mailto:[email protected]>> wrote: > > > 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; > > Anyway , I still don’t know how to debug vdsm, I cann’t log in to centos with > user VDSM, because I don’t know the passwd of user vdsm and if I changed the > password, the service vdsmd will cann’t start. > > the vdsm account is intentionally disabled for interactive login > > > > You told me “should follow the devel setup wiki” , what’s the true link of > vdsm devel setup wiki ? I can’t 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’re troubleshooting? > > 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’s code > using python IDE such as Pycharm , > > You know that we can implement this debug requirement in ovirt engine easily, > but I can’t implement local debug in vdsm easily, because vdsm didn’t allow > root to run or debug. > > Is there any debug instruction ?
I don’t think it’s possible to debug it from PyCharm, or any IDE for that matter, easily. It’s a multithreaded application, you can’t 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’re interested in. Thanks, michal > > Thank you > Mark > > Thanks, > michal > > > > > Thank you > > 发件人: Michal Skrivanek [mailto:[email protected] > <mailto:[email protected]>] > 发送时间: 2016年7月26日 5:00 > 收件人: lifuqiong > 抄送: users; devel > 主题: 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 > > > > On 25 Jul 2016, at 21:50, Sandro Bonazzola <[email protected] > <mailto:[email protected]>> wrote: > > Adding some people from virt team. > Il 23/Lug/2016 11:44, "lifuqiong" <[email protected] > <mailto:[email protected]>> 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; > > 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. > Depends what you modified, it's impossible to say from what you > described....but a general advice is you simply don't do that:) > > > > > > > > > > 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. > > > > > > _______________________________________________ > > Devel mailing list > > [email protected] <mailto:[email protected]> > > http://lists.ovirt.org/mailman/listinfo/devel > > <http://lists.ovirt.org/mailman/listinfo/devel>
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