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repmgrd: document parameters which can be reloaded via SIGHUP

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Also add a new subsection with details on reloading repmgrd configuration.
This commit is contained in:
Ian Barwick
2018-09-27 10:42:11 +09:00
parent 8646fd6004
commit a71e644255
2 changed files with 201 additions and 20 deletions
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215
doc/repmgrd-configuration.sgml
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@@ -34,24 +34,6 @@
the <ulink url="https://www.postgresql.org/docs/current/static/runtime-config-client.html#GUC-SHARED-PRELOAD-LIBRARIES">PostgreSQL documentation</ulink>.
</para>
<para>
To apply configuration file changes to a running <application>repmgrd</application>
daemon, execute the operating system's r<application>repmgrd</application> service reload command
(see <xref linkend="appendix-packages"> for examples),
or for instances which were manually started, execute <command>kill -HUP</command>, e.g.
<command>kill -HUP `cat /tmp/repmgrd.pid`</command>.
</para>
<note>
<para>
Check the <application>repmgrd</application> log to see what changes were
applied, or if any issues were encountered when reloading the configuration.
</para>
</note>
<para>
Note that only a subset of configuration file parameters can be changed on a
running <application>repmgrd</application> daemon.
</para>
<sect2 id="repmgrd-automatic-failover-configuration">
<title>automatic failover configuration</title>
@@ -167,6 +149,203 @@
</para>
</sect2>
<sect2 id="repmgrd-reloading-configuration"xreflabel="reloading repmgrd configuration">
<indexterm>
<primary>repmgrd</primary>
<secondary>applying configuration changes</secondary>
</indexterm>
<title>Applying configuration changes to repmgrd</title>
<para>
To apply configuration file changes to a running <application>repmgrd</application>
daemon, execute the operating system's <application>repmgrd</application> service reload command
(see <xref linkend="appendix-packages"> for examples),
or for instances which were manually started, execute <command>kill -HUP</command>, e.g.
<command>kill -HUP `cat /tmp/repmgrd.pid`</command>.
</para>
<tip>
<para>
Check the <application>repmgrd</application> log to see what changes were
applied, or if any issues were encountered when reloading the configuration.
</para>
</tip>
<para>
Note that only the following subset of configuration file parameters can be changed on a
running <application>repmgrd</application> daemon:
</para>
<itemizedlist spacing="compact" mark="bullet">
<listitem>
<simpara>
<varname>async_query_timeout</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>bdr_local_monitoring_only</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>bdr_recovery_timeout</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>conninfo</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>degraded_monitoring_timeout</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>event_notification_command</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>event_notifications</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>failover</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>follow_command</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>log_facility</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>log_file</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>log_level</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>log_status_interval</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>monitor_interval_secs</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>monitoring_history</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>primary_notification_timeout</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>promote_command</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>reconnect_attempts</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>reconnect_interval</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>repmgrd_standby_startup_timeout</varname>
</simpara>
</listitem>
</itemizedlist>
<para>
The following set of configuration file parameters must be updated via
<command><link linkend="repmgr-standby-register">repmgr standby register --force</link></command>,
as they require changes to the <literal>repmgr.nodes</literal> table so they are visible to
all nodes in the replication cluster:
</para>
<itemizedlist spacing="compact" mark="bullet">
<listitem>
<simpara>
<varname>node_id</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>node_name</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>data_directory</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>location</varname>
</simpara>
</listitem>
<listitem>
<simpara>
<varname>priority</varname>
</simpara>
</listitem>
</itemizedlist>
<note>
<para>
After executing <command><link linkend="repmgr-standby-register">repmgr standby register --force</link></command>,
<application>repmgrd</application> <emphasis>must</emphasis> be restarted for the changes to take effect.
</para>
</note>
</sect2>
</sect1>
<sect1 id="repmgrd-daemon">