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

From: "Milan Zamazal" <mzamazal(a)redhat.com&gt; To: "lifuqiong" <lifuqiong(a)cncloudsec.com&gt; 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&gt; 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.