• Iustin Pop's avatar
    Workaround fake failures in drbd+live migration · db8667b7
    Iustin Pop authored
    This patch is an attempt to fix the ugly issue during migration:
      Cannot resync disks on node …: [True, 100]
    If my understanding is correct, sometimes we poll the /proc/drbd file at
    an inoportune moment, while it's being updated, or while the DRBD device
    is changing state, and we see an unexpected state.
    Based on the assumption that this is just a transient state, rather than
    aborting directly, we change the backend.DrbdWaitSync() function to
    retry a few times the operation, giving DRBD a chance to settle down at
    the end of the resync.
    Signed-off-by: default avatarIustin Pop <iustin@google.com>
    Reviewed-by: default avatarGuido Trotter <ultrotter@google.com>
backend.py 86.3 KB