Hi,
We had some sporadic nbd-stop error when trying to migrate vm with rbd storage
+ writeback between 2 differents cluster:
(This is without my other targetcpu patch)
2023-09-28 16:20:39 ERROR: error - tunnel command '{"cmd":"nbdstop"}' failed -
failed to handle 'nbdstop' command - VM 140 qmp command 'nbd-server-stop'
failed - got timeout
2023-09-28 16:20:39 ERROR: migration finished with problems (duration 00:01:42)
I'm not sure, maybe it's related to writeback, because it never happend with a
fresh started vm, but vms running since some time can trigger this.
(I'm not sure, maybe nbd need to flush pending datas in cache ?)
Currently, the tunnel command have a 30s timeout, but the qmp command is only
at 5s.
Also the tunnel v2 command don't have any eval, so the migration abort keeping
both source && target vm locked.
unlocking target vm and resume it manually is working, so it really seem to be
a too low timeout.
Alexandre Derumier (2):
nbd_stop: increase timeout to 25s
migration: add missing eval on nbdstop with tunnel v2.
PVE/QemuMigrate.pm | 8 +++++++-
PVE/QemuServer.pm | 2 +-
2 files changed, 8 insertions(+), 2 deletions(-)
--
2.39.2
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