Hi Samed,
Thanks for the quick reply.
I am trying it manually with below step:
1. Shut down the primary node
2. Creating trigger file on standby node before promoting it to primay.
3. "recovery_target_timline='
latest'” adding this parameter in recovery file on standby and restarting it.
On current standby :
psql -p 5432 -c "select pg_is_in_recovery();"
pg_is_in_recovery
-------------------
t
(1 row)
But on Current Primary:
psql -c "select application_name, state, sync_priority, sync_state from pg_stat_replication;"
application_name | state | sync_priority | sync_state
------------------+-------+---
------------+------------ (0 rows)
Thanks & Regards,
Sunil N Shinde
From: Samed YILDIRIM [mailto:samed@xxxxxxxxxx]
Sent: 08 September 2017 12:22
To: pgsql-admin@xxxxxxxxxxxxxx; Sunil N Shinde <Sunil.Shinde@xxxxxxxxxx>
Subject: Re: postgres streaming replication for HA
Hi Shinde,
Do you trying swithover manually? Or do you use any manager or script to handle switchover operation?
Best regards.
--
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08:51, 8 Eylül 2017, Sunil N Shinde <sunil.shinde@xxxxxxxxxx>:
Hi,
I am forming 2 node cluster of streaming replication for HA. I could able to succeed with the replication process.
But I am not able to complete the “switchover”.
Version : postgresql-9.6
OS :RHEL7
Master Node Parameters:
wal_level = hot_standby
synchronous_commit = local
archive_mode = on
archive_command = 'cp %p /var/lib/pgsql/9.6/data/ archive/%f'
max_wal_senders = 2
wal_keep_segments = 10
synchronous_standby_names = 'UWPGRECLUS2'
pb_hba.conf
# Localhost
host replication replica 127.0.0.1/32 md5
# PostgreSQL Master IP address
host replication replica 10.0.3.4/32 md5
# PostgreSQL SLave IP address
host replication replica 10.0.3.5/32 md5
Slave Node Parameters:
wal_level = hot_standby
synchronous_commit = local
max_wal_senders = 2
wal_keep_segments = 10
synchronous_standby_names = 'UWPGRECLUS2'
hot_standby = on
Replication is properly happening from master to slave. But I am not able to switchover between the nodes.
Can anyone please guide me in this regard?
Thanks & Regards,
Sunil N Shinde
Assistant Manager – DBA
Mastek Ltd | Mastek Millennium Center, Millennium Business Park, Mahape, Navi Mumbai-400710 .
Mob:- 9819002393
Hi Guys,
Even I have been trying to implement the automatic failover using a script in failover_command of pgpool-II
I've setup streaming replication using replication slots and 2 separate pgpool servers (primary and standby).
The postgresql failover works sometime and doesn't work sometimes. On further analysis it seem to be an issue with the systemctl utility in centos7 i.e., even when the postgres services are up and running fine, the systemctl shows the postgresql service in failed state and systemctl is not reliably starting/stopping/restarting the pstgresql service.
Any insight here on how to fix the issue and make the HA environment reliable would be highly appreciated.
Thanks & Regards,
Sumeet Shukla
On Fri, Sep 8, 2017 at 12:37 PM, Sunil N Shinde <Sunil.Shinde@xxxxxxxxxx> wrote:
