1DRBD-WAIT-PROMOTAB(7)             DRBD Manual            DRBD-WAIT-PROMOTAB(7)
2
3
4

NAME

6       drbd-wait-promotable@.service - Wait for DRBD to become promotable
7

SYNOPSIS

9       drbd-wait-promotable@RESNAME.service - Wait for DRBD to become
10       promotable
11
12

DESCRIPTION

14       Usually you do not want to "hardcode" an unconditional promotion
15       attempt of DRBD resources, because you usually cannot know a-priory
16       whether this instance of DRBD will have access to good data (yet).
17
18       If you try to promote (mount, use) DRBD before it can be certain to
19       have access to good data, the attempt will fail in various ways,
20       typically claiming "wrong medium type", "need access to good data".
21
22       This unit will wait for the DRBD internal state to indicate that it has
23       access to good data. It does not monitor the state further, so this is
24       good enough only to avoid trying to mount "too early" if you hard-code
25       the mount attempt into your boot sequence, for example using an fstab
26       entry or similar.
27
28       To monitor and react to DRBD state changes, use drbd-reactor or a
29       cluster manager like pacemaker.
30
31       If you systemctl enable this unit, it will be required by drbd@.target,
32       so anything depending on that target, for example an fstab entry, will
33       implicitly wait until this DRBD indicated it was "healthy enough" to be
34       used.
35
36       It can still timeout, in which case systemd sees this as a start
37       failure, and starting of any dependencies (e.g. the mount) won’t be
38       attempted at this point.
39
40

SEE ALSO

42       drbd@.service(7), drbd@.target(7), drbd-lvchange@.service(7)
43
44

AUTHORS

46       LINBIT HA Solutions GmbH https://linbit.com
47
48
49
50drbd-utils                        2021-11-01             DRBD-WAIT-PROMOTAB(7)
Impressum