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doc: rearrange "repmgr node rejoin" reference for clarity

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The <important> section looked like an actual subsection, so convert
that and the following example section into <refsect2> sections.
This commit is contained in:
Ian Barwick
2020-09-15 13:42:18 +09:00
parent b5b7d635ad
commit 028e3ab48d
1 changed files with 38 additions and 20 deletions
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58
doc/repmgr-node-rejoin.xml
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@@ -288,7 +288,15 @@
to execute <command>pg_rewind</command> to ensure the node can be rejoined successfully.
</para>
<important>
<refsect2 id="repmgr-node-rejoin-pg-rewind-config-files" xreflabel="pg_rewind and configuration files">
<title><command>pg_rewind</command> and configuration file retention</title>
<indexterm>
<primary>pg_rewind</primary>
<secondary>configuration file retention</secondary>
</indexterm>
<para>
Be aware that if <command>pg_rewind</command> is executed and actually performs a
rewind operation, any configuration files in the PostgreSQL data directory will be
@@ -296,17 +304,27 @@
</para>
<para>
To prevent this happening, provide a comma-separated list of files to retain
using the <literal>--config-file</literal> command line option; the specified files
using the <option>--config-file</option> command line option; the specified files
will be archived in a temporary directory (whose parent directory can be specified with
<literal>--config-archive-dir</literal>) and restored once the rewind operation is
complete.
<option>--config-archive-dir</option>, default: <filename>/tmp</filename>)
and restored once the rewind operation is complete.
</para>
</important>
</refsect2>
<para>
Example, first using <literal>--dry-run</literal>, then actually executing the
<literal>node rejoin command</literal>.
<programlisting>
<refsect2 id="repmgr-node-rejoin-pg-rewind-example" xreflabel="example using repmgr node rejoin and pg_rewind">
<title>Example using <command>repmgr node rejoin</command> and <command>pg_rewind</command></title>
<indexterm>
<primary>pg_rewind</primary>
<secondary>configuration file retention</secondary>
</indexterm>
<para>
Example, first using <option>--dry-run</option>, then actually executing the
<literal>node rejoin command</literal>.
<programlisting>
$ repmgr node rejoin -f /etc/repmgr.conf -d 'host=node3 dbname=repmgr user=repmgr' \
--config-files=postgresql.local.conf,postgresql.conf --verbose --force-rewind --dry-run
INFO: replication connection to the rejoin target node was successful
@@ -322,17 +340,17 @@
pg_rewind -D '/var/lib/postgresql/data' --source-server='host=node3 dbname=repmgr user=repmgr'
INFO: prerequisites for executing NODE REJOIN are met</programlisting>
<note>
<para>
If <option>--force-rewind</option> is used with the <option>--dry-run</option> option,
this checks the prerequisites for using <application>pg_rewind</application>, but is
not an absolute guarantee that actually executing <application>pg_rewind</application>
will succeed. See also section <xref linkend="repmgr-node-rejoin-caveats"/> below.
</para>
<note>
<para>
If <option>--force-rewind</option> is used with the <option>--dry-run</option> option,
this checks the prerequisites for using <application>pg_rewind</application>, but is
not an absolute guarantee that actually executing <application>pg_rewind</application>
will succeed. See also section <xref linkend="repmgr-node-rejoin-caveats"/> below.
</para>
</note>
</note>
<programlisting>
<programlisting>
$ repmgr node rejoin -f /etc/repmgr.conf -d 'host=node3 dbname=repmgr user=repmgr' \
--config-files=postgresql.local.conf,postgresql.conf --verbose --force-rewind
NOTICE: pg_rewind execution required for this node to attach to rejoin target node 3
@@ -344,8 +362,8 @@
NOTICE: starting server using "pg_ctl -l /var/log/postgres/startup.log -w -D '/var/lib/pgsql/data' start"
NOTICE: NODE REJOIN successful
DETAIL: node 2 is now attached to node 3</programlisting>
</para>
</para>
</refsect2>
</refsect1>
<refsect1 id="repmgr-node-rejoin-caveats" xreflabel="Caveats">