On Tue, Dec 11, 2018 at 14:39:40 +0000, Peter Kukla wrote:
> Hello,
> I have a CentOS 7 client running on a CentOS 7 server.  "virsh --version" 
> reports that 3.9.0 is being used.
> I'm issuing a "virsh shutdown" command to shutdown the client.  I then 
> confirm that the client has actually shutdown using "virsh list --all".
> Lately I've been seeing instances where I shutdown the client, turn away to 
> work on something else, and then turn back to find that the client has booted 
> again.
> Initially I thought I was mistaken, and that I somehow hadn't properly 
> shutdown the client, but further experimentation shows that's definitely not 
> the case.  I've been able to reproduce this repeatedly using the following 
> steps.
> 1.  Run "virsh shutdown CLIENT"2.  Wait ~30-60 seconds3.  Run "virsh list 
> --all; virsh console CLIENT"
> If I run "virsh console CLIENT" on its own when the client is in a shutdown 
> state, I get the expected "error: The domain is not running" message.  If I 
> omit step #2 and run step #3 immediately after shutting down the client, 
> virsh also complains that the client's not started and refuses to open a 
> console.
> However, if I add a pause -- step 2, above -- between the shutdown and the 
> "list --all" commands, then "list --all" shows that the client is running, 
> and a console is opened to the VM.
> I have confirmed that the client boot is definitely being started by the 
> "list --all" command (and not being started by something else while I'm not 
> looking) by combining the "list --all" and "console" commands in step 3.  
> This is ensuring that the console is started as soon as the "list --all" is 
> complete, and the resulting screen output shows the BIOS boot options quickly 
> followed by the kernel boot messages being dumped to the console.  I can 
> watch the entire boot process from start to finish.
> That pause between the shutdown and the "list --all" is critical.  I've 
> shutdown the client and then immediately followed it up with the command:
>         watch virsh list --all
> ...which will run the "list --all" command every 2 seconds.  This will run 
> indefinitely without triggering the boot, which eliminates the possibility of 
> the boot occurring due to the amount of time since the shutdown.
> It may be that other virsh commands are also causing the client to boot, but 
> thus far I've only reproduced it using the list --all command.
> Can anyone tell me why this is happening?  A bug?  Something in my config?  
> Something else?
> Thanks in advance,

This is indeed very strange and we would need to look at the logs to
check what's going on. Could you follow the steps in
https://wiki.libvirt.org/page/DebugLogs#Runtime_setting to enable debug
logs for libvirtd and share the (compressed) libvirtd.log somewhere?

Jirka

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