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doc: add clarifications to "Standby disconnection on failover"

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Ian Barwick
2019-09-05 18:00:56 +09:00
parent 19190153a0
commit bce039f336
1 changed files with 9 additions and 2 deletions
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11
doc/repmgrd-automatic-failover.xml
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@@ -268,11 +268,12 @@
<para>
If <option>standby_disconnect_on_failover</option> is set to <literal>true</literal> in
<filename>repmgr.conf</filename>, in a failover situation &repmgrd; will forcibly disconnect
the local node's WAL receiver before making a failover decision.
the local node's WAL receiver, and wait for the WAL receiver on all sibling nodes to be
disconnected, before making a failover decision.
</para>
<note>
<para>
<option>standby_disconnect_on_failover</option> is available from PostgreSQL 9.5 and later.
<option>standby_disconnect_on_failover</option> is available with PostgreSQL 9.5 and later.
Additionally this requires that the <literal>repmgr</literal> database user is a superuser.
</para>
</note>
@@ -291,6 +292,12 @@
plus however many seconds it takes to confirm the WAL receiver is disconnected before
&repmgrd; proceeds with the failover decision.
</para>
<para>
&repmgrd; will wait up to <option>sibling_nodes_disconnect_timeout</option> seconds (default:
<literal>30</literal>) to confirm that the WAL receiver on all sibling nodes hase been
disconnected before proceding with the failover operation. If the timeout is reached, the
failover operation will go ahead anyway.
</para>
<para>
Following the failover operation, no matter what the outcome, each node will reconnect its WAL receiver.
</para>