Checking drbd status in SOC

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Environment

SUSE OpenStack Cloud 6

Situation

SUSE OpenStack Cloud deployment guide suggests the following command to check whether controller node deployed with drbd is in primary role:

systemctl status drbd

However the command doesn't say anything about the role status at all:

# /bin/systemctl status drbd
drbd.service - DRBD -- please disable. Unless you are NOT using a cluster manager.
   Loaded: loaded (/usr/lib/systemd/system/drbd.service; enabled)
   Active: active (exited) since Tue 2016-07-19 10:38:45 CEST; 1 day 21h ago
Main PID: 21014 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/drbd.service

Jul 19 10:38:44 cloud001 drbd[21014]: Starting DRBD resources: [
Jul 19 10:38:44 cloud001 drbd[21014]: create res: postgresql rabbitmq
Jul 19 10:38:44 cloud001 drbd[21014]: prepare disk: postgresql rabbitmq
Jul 19 10:38:44 cloud001 drbd[21014]: adjust disk: postgresql rabbitmq
Jul 19 10:38:44 cloud001 drbd[21014]: adjust net: postgresql rabbitmq
Jul 19 10:38:44 cloud001 drbd[21014]: ]
Jul 19 10:38:45 cloud001 drbd[21014]: WARN: stdin/stdout is not a TTY; using /dev/console.
Jul 19 10:38:45 cloud001 drbd[21014]: WARN: nothing stacked for this host (lpcloudp001), nothing to do in stacked mode!
Jul 19 10:38:45 cloud001 systemd[1]: Started DRBD -- please disable. Unless you are NOT using a cluster manager..

Resolution

In SOC6 use 'cat /proc/drbd' to discover the required information:

# /proc/drbd
version: 8.4.6 (api:1/proto:86-101)
GIT-hash: 833d830e0152d1e457fa7856e71e11248ccf3f70 build by abuild@sheep14, 2016-05-09 23:14:56
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
    ns:57813717 nr:0 dw:57813717 dr:8271982 al:1894 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
1: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
    ns:7647 nr:0 dw:7647 dr:4682 al:7 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0

On SOC7 use commands 'drbd-overview' or 'drbdadm status':

# drbd-overview
0:postgresql/0 Connected(2*) Primar/Second UpToDa/UpToDa /var/lib/pgsql    xfs 7.0G 209M 6.8G 3%
1:rabbitmq/0    Connected(2*) Primar/Second UpToDa/UpToDa /var/lib/rabbitmq xfs 7.0G 36M 7.0G 1%

# drbdadm status
postgresql role:Primary
disk:UpToDate
d52-54-00-78-2d-2e role:Secondary
    peer-disk:UpToDate

rabbitmq role:Primary
disk:UpToDate
d52-54-00-78-2d-2e role:Secondary
    peer-disk:UpToDate

Cause

Bug in documentation has been reported.

Disclaimer

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