github/repmgr
1
0
Fork 0
mirror of https://github.com/EnterpriseDB/repmgr.git synced 2026-03-24 15:46:29 +00:00
Code Issues Packages Projects Releases 1 Wiki Activity

repmgr: poll demoted primary after restart during switchover

Browse Source 
During a switchover operation, once the demoted primary has been restarted
as a standby, repmgr attempts to reconnect to verify its status and drop
any redundant replication slots. However it's possible the standby may still
be in the startup phase, so poll for "standby_reconnect_timeout" seconds
before giving up.

Addresses GitHub #408.
This commit is contained in:
Ian Barwick
2018-03-27 15:58:18 +09:00
parent deea4f69f7
commit 6f9a1f975e
4 changed files with 75 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
doc/repmgr-standby-switchover.sgml
View File

@@ -115,6 +115,48 @@
</refsect1>
<refsect1>
<title>Configuration file settings</title>
<para>
Note that following parameters in <filename>repmgr.conf</filename> are relevant to the
switchover operation:
<itemizedlist spacing="compact" mark="bullet">
<listitem>
<simpara>
<literal>reconnect_attempts</literal>: number of times to check the original primary
for a clean shutdown after executing the shutdown command, before aborting
</simpara>
</listitem>
<listitem>
<simpara>
<literal>reconnect_interval</literal>: interval (in seconds) to check the original
primary for a clean shutdown after executing the shutdown command (up to a maximum
of <literal>reconnect_attempts</literal> tries)
</simpara>
</listitem>
<listitem>
<simpara>
<literal>replication_lag_critical</literal>:
if replication lag (in seconds) on the standby exceeds this value, the
switchover will be aborted (unless the <literal>-F/--force</literal> option
is provided)
</simpara>
</listitem>
<listitem>
<simpara>
<literal>standby_reconnect_timeout</literal>:
Number of seconds to attempt to reconnect to the demoted primary
once it has been restarted.
</simpara>
</listitem>
</itemizedlist>
</para>
</refsect1>
<refsect1>
<title>Execution</title>

36
doc/switchover.sgml
View File

@@ -170,34 +170,16 @@
</para>
</important>
<para>
Note that following parameters in <filename>repmgr.conf</filename> are relevant to the
switchover operation:
<itemizedlist spacing="compact" mark="bullet">
<listitem>
<simpara>
<literal>reconnect_attempts</literal>: number of times to check the original primary
for a clean shutdown after executing the shutdown command, before aborting
</simpara>
</listitem>
<listitem>
<simpara>
<literal>reconnect_interval</literal>: interval (in seconds) to check the original
primary for a clean shutdown after executing the shutdown command (up to a maximum
of <literal>reconnect_attempts</literal> tries)
</simpara>
</listitem>
<listitem>
<simpara>
<literal>replication_lag_critical</literal>:
if replication lag (in seconds) on the standby exceeds this value, the
switchover will be aborted (unless the <literal>-F/--force</literal> option
is provided)
</simpara>
</listitem>
</itemizedlist>
</para>
<note>
<simpara>
See <xref linkend="repmgr-standby-switchover"> for a full list of available
command line options and <filename>repmgr.conf</filename> settings relevant
to performing a switchover.
</simpara>
</note>
</sect1>
<sect1 id="switchover-execution" xreflabel="Executing the switchover command">