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wait for vm scopes to be gone

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This should help with the rare case where stop mode backups
fail to restart due to the $vmid.scope not being completely
gone when we want to restart. This queries systemd via dbus,
and if the scope is still there, awaits a UnitRemoved signal
for the scope from dbus.

For now with a 5 second timeout... (given that the processes
are already gone and it's really just waiting for systemd to
wake up, this should be plenty...)

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2019-06-19 09:21:22 +02:00 committed by Thomas Lamprecht
parent 71fc647ff9
commit 4f8cfa190a
1 changed files with 7 additions and 6 deletions
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5
PVE/QemuServer.pm
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@ -5335,12 +5335,13 @@ sub vm_start {
PVE::Storage::activate_volumes($storecfg, $vollist);
if (-d "/sys/fs/cgroup/systemd/qemu.slice/$vmid.scope") {
eval {
run_command(['/bin/systemctl', 'stop', "$vmid.scope"],
outfunc => sub {}, errfunc => sub {});
};
}
# Issues with the above 'stop' not being fully completed are extremely rare, a very low
# timeout should be more than enough here...
PVE::Systemd::wait_for_unit_removed("$vmid.scope", 5);
my $cpuunits = defined($conf->{cpuunits}) ? $conf->{cpuunits}
: $defaults->{cpuunits};