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Re: [libvirt] [PATCH] shutting down guest vms on host shutdown does not work



On 07/27/2012 09:01 AM, Gerd v. Egidy wrote:
> Hi,
> 
> I originally postet this into the Fedora bugzilla
> https://bugzilla.redhat.com/show_bug.cgi?id=843836
> but was asked by Eric to post it here for review.

Thanks.

> 
> Currently gracefully shutting down guest vms on host shutdown does not work on 
> Fedora 17, the guests are killed hard on system shutdown.
> 
> I use:
> fedora-release-17-1.noarch
> libvirt-client-0.9.11.4-3.fc17.x86_64
> systemd-44-17.fc17.x86_64
> 
> But I have looked into current libvirt git and see the same code there so I 
> don't think it is any different with current git, but I have not verified this.

Your patch applied just fine to git; I'm amending the commit message to
elide this uncertainty.

> 
> The reason is systemd considers libvirt-guests.service to be stopped when the 
> system is running:
> 
> $ systemctl status libvirt-guests.service 
> libvirt-guests.service - Suspend Active Libvirt Guests
>           Loaded: loaded (/usr/lib/systemd/system/libvirt-guests.service; 
> enabled)
>           Active: deactivating (stop) since Fri, 27 Jul 2012 15:47:31 +0200; 
> 2min 48s ago
>          Process: 1085 ExecStart=/etc/init.d/libvirt-guests start 
> (code=exited, status=0/SUCCESS)
>          Control: 1150 (libvirt-guests)
>           CGroup: name=systemd:/system/libvirt-guests.service
>                   └ control
>                     ├ 1150 /bin/sh /etc/init.d/libvirt-guests stop
>                     └ 2257 sleep 1
> 
> libvirt-guests.service is defined as type "simple" in systemd (the default). 
> That means systemd will shut down the service when the start executable is 
> terminated after starting is done. Systemd will not call stop again on system 
> shutdown because it thinks it is already stopped.
> 
> The solution is to define it as type "oneshot" and set the flag 
> "RemainAfterExit". Then systemd will consider the service as active after 
> startup and will call the stop function on host shutdown.

Thanks for researching this!  ACK and applied.

Now a followup question - in AUTHORS, you are listed as Gerd von Egidy,
but in this commit, your authorship is Gerd v. Egidy.  Which do you
prefer, and I'll update .mailmap and possibly AUTHORS (it makes it so
that 'git shortlog' will bundle all commits by you under a single
listing of your preferred spelling).

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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