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Well, imagine domains were running, and as the host went down, they
were managesaved. Later, after some time, the host went up again and
domains got restored. But without correct time. And depending on how
long was the host shut off, it may take some time for ntp to sync the
time too. But hey, wait a minute. We have an API just for that! So:
1) Introduce SYNC_TIME variable in libvirt-guests.sysconf to allow
users control over the new functionality
2) Call 'virsh domtime --sync $dom' in the libvirt-guests script.
Unfortunately, this is all-or-nothing approach (just like anything
else with the script). Domains are required to have configured and
running qemu-ga inside.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
With this patch, it's possible to shut down guests in parallel. Parallel
startup was possible before, but this functionality was not documented
properly.
To enable parallel startup set the START_DELAY to 0.
Parallel shutdown has a configurable parameter PARALLEL_SHUTDOWN that
defines the number of machines being shut down in parallel. Enabling
this feature changes the semantics of SHUTDOWN_TIMEOUT parameter that is
applied as a cumulative timeout to shutdown all guests on a URI.
libvirt-guests is a perfect use case for bypassing the file system
cache - lots of filesystem traffic done at system shutdown, where
caching is pointless, and startup, where reading large files only
once just gets in the way. Make this a configurable option in the
init script, but defaulting to existing behavior.
* tools/libvirt-guests.sysconf (BYPASS_CACHE): New variable.
* tools/libvirt-guests.init.sh (start, suspend_guest): Use it.
Since libvirt-guests init script and its configuration do not require
libvirtd to be running/installed, it was a bad idea to put them into
daemon directory. libvirt.spec even includes these files in
libvirt-client subpackage, which may result in build failure for
client-only builds when the whole daemon directory is just skipped.
