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 <http://ovirt.org/> 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. 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. 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 ? Thank you Mark 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 < <mailto:[email protected]> [email protected]> wrote: Adding some people from virt team. Il 23/Lug/2016 11:44, "lifuqiong" < <mailto:[email protected]> [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 > <mailto:[email protected]> [email protected] > <http://lists.ovirt.org/mailman/listinfo/devel> > http://lists.ovirt.org/mailman/listinfo/devel
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