[ClusterLabs] Pacemaker: pgsql

[Shital A]

On Tue, 24 Sep 2019, 22:20 Shital A, <brightuser2019 at gmail.com> wrote:

> Hello,
>
> We have setup active-passive cluster using streaming replication on
> Rhel7.5. We are testing pacemaker for automated failover.
> We are seeing below issues with the setup :
>
> 1. When a failover is triggered when data is being added to the primary by
> killing primary (killall -9 postgres), the standby doesnt come up in sync.
> On pacemaker, the crm_mon -Afr shows standby in disconnected and HS:alone
> state.
>
> On postgres, we see below error:
>
> < 2019-09-20 17:07:46.266 IST > LOG:  entering standby mode
> < 2019-09-20 17:07:46.267 IST > LOG:  database system was not properly
> shut down; automatic recovery in progress
> < 2019-09-20 17:07:46.270 IST > LOG:  redo starts at 1/680A2188
> < 2019-09-20 17:07:46.370 IST > LOG:  consistent recovery state reached at
> 1/6879D9F8
> < 2019-09-20 17:07:46.370 IST > LOG:  database system is ready to accept
> read only connections
> cp: cannot stat '/var/lib/pgsql/9.6/data/archivedir/000000010000000100000068':
> No such file or directory
> < 2019-09-20 17:07:46.751 IST > LOG:  statement: select pg_is_in_recovery()
> < 2019-09-20 17:07:46.782 IST > LOG:  statement: show
> synchronous_standby_names
> < 2019-09-20 17:07:50.993 IST > LOG:  statement: select pg_is_in_recovery()
> < 2019-09-20 17:07:53.395 IST > LOG:  started streaming WAL from primary
> at 1/68000000 on timeline 1
> < 2019-09-20 17:07:53.436 IST > LOG:  invalid contrecord length 2662 at
> 1/6879D9F8
> < 2019-09-20 17:07:53.438 IST > FATAL:  terminating walreceiver process
> due to administrator command
> cp: cannot stat '/var/lib/pgsql/9.6/data/archivedir/00000002.history': No
> such file or directory
> cp: cannot stat '/var/lib/pgsql/9.6/data/archivedir/000000010000000100000068':
> No such file or directory
>
> When we try to restart postgres on the standby, using pg_ctl restart, the
> standby start syncing.
>
>
> 2. After standby syncs using pg_ctl restart as mentioned above, we found
> out that 1-2 records are missing on the standby.
>
> Need help to check:
> 1. why the standby starts in disconnect, HS:alone state?
>
> f you have faced this issue/have knowledge, please let us know.
>
> Thanks.
>


Hello,

I didn't  receive any reply on this issue.wondering whether there are no
opinions or whether pacemaker with pgsql is not recommended?.


Thanks!

>
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