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Diffstat (limited to 'ops/robust-psql.md')
| -rw-r--r-- | ops/robust-psql.md | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/ops/robust-psql.md b/ops/robust-psql.md index b378bf8..3156b0a 100644 --- a/ops/robust-psql.md +++ b/ops/robust-psql.md @@ -167,6 +167,7 @@ done # Standby promotion procedure (read/write mode) 1. Prerequisite: complete the read-only failover procedure +1. Sanity check the application connection to the standby 1. Shut off the master 1. Run `pg_ctl promote` on the standby @@ -197,13 +198,15 @@ The old master is now the standby, and the old standby is now the master. ## Minor version upgrades -This process will incur a short service degredation. The services will be in -read-only mode for up to 10 minutes. +This procedure will incur up to a few minutes of downtime, but ideally the +outage can only last as little as a few seconds. -1. Complete the failover procedure -1. Perform the upgrade and restart the postgresql daemon -1. Reverse the failover procedure -1. Upgrade the standby and restart the standby +1. Complete the standby promotion procedure +1. Upgrade the master, then complete the master demotion procedure + +At this point, the master has become the standby and is now up-to-date. Repeat +the process again to upgrade the new standby and return the master/standby +assignments to normal. ✗ TODO: Test this process @@ -213,6 +216,7 @@ This process will incur a longer service degredation. The services will be in read-only mode for up to 30 minutes. 1. Complete the failover procedure +1. Stop replication on the standby: `select pg_xlog_replay_pause()` 1. Perform the upgrade and reboot the host 1. Sanity check the database 1. Reverse the failover procedure |