Hi
I have 1 master and 1 slave wal streaming replication setup and the Application connects via a load balancer (LTM) where the all connections are redirected to the master member (master db).
We have archive_mode enabled.
I am trying to test to use pg_rewind to restore the new slave (old master) after a failover while the system is under load.
Here are the steps I take to test:
1. Disable the master ltm member (all connections redired to slave member)
2. Promote slave (touch promote.me)
3. Stop the master db (old master)
4. Do pg_rewind on the new slave (old master)
5. Start the new slave.
Please see attached psql.jpg for the result from the pg_rewind.
However, when I tried to start the new slave, I am getting the error that it cannot locate the archive wal files and can not receive data from WAL stream error.
Please see attached logs.jpg.
Checking the on the new master, I see that the check point that its trying to restore is the file 000000040000009C0000006F, but the file does not exist anywhere on the new master. Not in the pg_xlog or the archive folder. (as specified in the postgresql.conf)
Please see attached psql.jpg.
Here is my recovery.conf :
standby_mode = 'on'
primary_conninfo = 'host=10.69.19.18 user=replicant’
trigger_file = '/var/run/promote_me'
restore_command = 'cp /pg_backup/backup/archive_sync/%f "%p"'
does anyone know why?
Under what conditions will pg_rewind wont’ work?
Thanks.
Regards
Dylan
