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Thread: Notify When Streaming Replication Failover Occurred (slave promoted to master).

Notify When Streaming Replication Failover Occurred (slave promoted to master).

From
Avi Weinberg
Date:

I need to take actions when Postgres streaming replication failover occurred.  Is there a way to be notified when Postgres slave becomes master?  If no such notification possible, what is the best way to actively monitor which server is master.  My Postgres  is running inside Kubernetes and the HA is managed by Patroni.

 

Thanks!

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Re: Notify When Streaming Replication Failover Occurred (slave promoted to master).

From
"Peter J. Holzer"
Date:
On 2021-06-13 08:00:24 +0000, Avi Weinberg wrote:
> I need to take actions when Postgres streaming replication failover occurred.
> Is there a way to be notified when Postgres slave becomes master?  If no such
> notification possible, what is the best way to actively monitor which server is
> master.  My Postgres  is running inside Kubernetes and the HA is managed by
> Patroni.

I just do
    patronictl list -f yaml | grep -v 'Lag in MB'
periodically and send an email if the output changes. Of course instead
of sending an email the script could take any other action.

        hp

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   _  | Peter J. Holzer    | Story must make more sense than reality.
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