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vm_start: add syslog info with which PID a VM was started

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Adds a syslog entry to log the process id that has been given to the
QEMU VM process at start. This is helpful debugging information if the
pid shows up at other places, like a kernel stack trace, while the VM
has been running, but cannot be retrieved anymore (e.g. the pidfile has
been deleted or only the syslog is available).

The syslog has been put in the `PVE::QemuServer::vm_start_nolock`
subroutine to make sure that the PID is logged not only when the VM has
been started by the API endpoint `vm_start`, but also when the VM is
started by a remote migration.

Suggested-by: Hannes Dürr <h.duerr@proxmox.com>
Suggested-by: Friedrich Weber <f.weber@proxmox.com>
Signed-off-by: Daniel Kral <d.kral@proxmox.com>
Reviewed-by: Daniel Herzig <d.herzig@proxmox.com>
This commit is contained in:
Daniel Kral 2024-10-23 11:55:43 +02:00 committed by Thomas Lamprecht
parent cf5080f991
commit 6f32c3fa7a
1 changed files with 3 additions and 0 deletions
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3
PVE/QemuServer.pm
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@ -43,6 +43,7 @@ use PVE::ProcFSTools;
use PVE::PBSClient;
use PVE::RESTEnvironment qw(log_warn);
use PVE::RPCEnvironment;
use PVE::SafeSyslog;
use PVE::Storage;
use PVE::SysFSTools;
use PVE::Systemd;
@ -6005,6 +6006,8 @@ sub vm_start_nolock {
eval { PVE::QemuServer::PCI::reserve_pci_usage($pci_reserve_list, $vmid, undef, $pid) };
warn $@ if $@;
syslog("info", "VM $vmid started with PID $pid.");
if (defined(my $migrate = $res->{migrate})) {
if ($migrate->{proto} eq 'tcp') {
my $nodename = nodename();