[pve-devel] [PATCH v3 qemu-server 3/3] migrate: remove left-over dbus-vmstate instance when migrating without conntrack state

[Fiona Ebner]

Am 10.12.25 um 2:29 PM schrieb Fiona Ebner:
> As reported in the enterprise support, if something went wrong when
> removing the dbus-vmstate object earlier, a following migrating using

Sorry, this should be 'not using' here.

> '--with-conntrack-state' will lead to a crash.
> 
> Try to remove any leftover when migrating without the conntrack state.
> 
> Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
> ---
> 
> Reported by Friedrich just after I sent the v3. Technically
> orthogonal, and should get much less likely after patches 1+2 here,
> but still good for future-proofing.
> 
>  src/PVE/QemuMigrate.pm | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/src/PVE/QemuMigrate.pm b/src/PVE/QemuMigrate.pm
> index 8fa84080..b3ddc34e 100644
> --- a/src/PVE/QemuMigrate.pm
> +++ b/src/PVE/QemuMigrate.pm
> @@ -254,6 +254,12 @@ sub prepare {
>                  'conntrack state migration not supported or disabled, '
>                      . 'active connections might get dropped',
>              );
> +
> +            # In case some leftover instance is running, stop it. The target QEMU instance won't
> +            # have the 'dbus-vmstate' object, so the source must not have it either.
> +            if (defined(PVE::QemuServer::DBusVMState::qemu_del_dbus_vmstate($vmid, quiet => 1))) {
> +                $self->log('warn', "stopped left-over dbus-vmstate helper for VM $vmid");
> +            }
>          }
>      }
>