On Wed, Sep 23, 2015 at 12:50:57PM +0100, Daniel P. Berrange wrote:
On Wed, Sep 23, 2015 at 10:50:58AM +0200, Martin Kletzander wrote:On Tue, Sep 22, 2015 at 07:33:30AM +0200, Marek Lukács wrote: >Hi, > >It will be nice feature to have configuration option >ALWAYS_START="$uri:$name $uri:name ..." in libvirt-guests >configuration file. > >If ON_BOOT is "start" and if ALWAYS_START is not empty, it iterates >over the ALWAYS_START and starts guests with same conditions (delays >etc.) before it starts guests from LISTFILE. >To be honest, I don't think that's _exactly_ what you want _just_ from libvirt itself; let me explain. >Benefits: >- guests are started with delays Delays that are done due to the guests are not something we should handle. Guests and mainly the applications inside them should handle this gracefully. Just delaying the starts is still error-prone. >- guests are started after host failure That's what libvirt-guests does already. And if you want some domains to be started on every start, there's the 'autostart' parameter for domains.Indeed, and I have a generall desire for libvirt-guests to go away entirely and have all its functionality just built into libvirtd. So I don't think taking functionality that already exist in libvirtd and adding it to libvirt-guest is the right direction for us to take.
As Jirka pointed out, it's harder to do this in libvirtd because you want all the domains to be saved when shutting down, but not when stopping the service. Another option would be that libvirt-guests would just tell libvirt over some other API, which is not hypervisor-specific (let's say admin api for example), that would call some function in all drivers that would do what libvirt-guests does now.
Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
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