[pve-devel] [PATCH common] systemd: add helper to cleanup transient unit
Thomas Lamprecht
t.lamprecht at proxmox.com
Thu Jun 22 14:56:04 CEST 2023
Am 20/06/2023 um 17:00 schrieb Fiona Ebner:
> which combines the stop+wait logic previously present at the single
> call site of wait_for_unit_removed() in QemuServer.pm. It also does a
> reset-failed call first, to ensure a unit in a failed state is also
> cleaned up properly.
>
> Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
> ---
> src/PVE/Systemd.pm | 16 +++++++++++++++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/src/PVE/Systemd.pm b/src/PVE/Systemd.pm
> index 2517d31..327106f 100644
> --- a/src/PVE/Systemd.pm
> +++ b/src/PVE/Systemd.pm
> @@ -7,7 +7,7 @@ use Net::DBus qw(dbus_uint32 dbus_uint64 dbus_boolean);
> use Net::DBus::Callback;
> use Net::DBus::Reactor;
>
> -use PVE::Tools qw(file_set_contents file_get_contents trim);
> +use PVE::Tools qw(file_set_contents file_get_contents run_command trim);
>
> sub escape_unit {
> my ($val, $is_path) = @_;
> @@ -167,6 +167,20 @@ sub wait_for_unit_removed($;$) {
> }, $timeout);
> }
>
> +sub cleanup_transient_unit($;$) {
> + my ($unit, $timeout) = @_;
> +
> + eval {
> + my %param = ( outfunc => sub {}, errfunc => sub {} );
> + # If the unit is in a failed state (e.g. after being OOM-killed), stopping is not enough.
> + run_command(['/bin/systemctl', 'reset-failed', $unit], %param);
> + run_command(['/bin/systemctl', 'stop', $unit], %param);
> + };
> +
> + # Issues with the above not being fully completed are rare, but not impossible, see bug #3733.
> + wait_for_unit_removed($unit, $timeout);
> +}
> +
> sub read_ini {
> my ($filename) = @_;
>
for the record, this the same in qemu-server directly for now, as talked off list,
didn't remembered that we got a run_command there already, still big thanks for
finding this!
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