[pve-devel] [PATCH qemu-server v3] rollback: Only create start task with --start if VM is not running

[Stefan Hanreich <s.hanreich@proxmox.com>]

When rolling back to the snapshot of a VM that includes RAM, the VM
gets started by the rollback task anyway, so no additional start task
is needed. Previously, when rolling back with the start parameter and
the VM snapshot included RAM, a start task was created. That task
failed because the VM had already been started by the rollback task.

Additionally documented this behaviour in the description of the start
parameter

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
Changes v2 -> v3:
Use vm_running_locally() instead of check_running()
Improved description

Changes v1 -> v2:
Do not parse config for checking type of snapshot but rather directly check
whether VM is running or not via check_running()

 PVE/API2/Qemu.pm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index e2a420f..c87602d 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -5066,7 +5066,8 @@ __PACKAGE__->register_method({
 	    snapname => get_standard_option('pve-snapshot-name'),
 	    start => {
 		type => 'boolean',
-		description => "Whether the VM should get started after rolling back successfully",
+		description => "Whether the VM should get started after rolling back successfully."
+		    . " (Note: VMs will be automatically started if the snapshot includes RAM.)",
 		optional => 1,
 		default => 0,
 	    },
@@ -5093,7 +5094,7 @@ __PACKAGE__->register_method({
 	    PVE::Cluster::log_msg('info', $authuser, "rollback snapshot VM $vmid: $snapname");
 	    PVE::QemuConfig->snapshot_rollback($vmid, $snapname);
 
-	    if ($param->{start}) {
+	    if ($param->{start} && !PVE::QemuServer::Helpers::vm_running_locally($vmid)) {
 		PVE::API2::Qemu->vm_start({ vmid => $vmid, node => $node });
 	    }
 	};
-- 
2.30.2