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repmgr: have "cluster show" exit with a non-zero value if issues detected

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If any issues are detected (e.g. node not reachable, unexpected node status
etc.), "repmgr cluster show" returns exit code 25 ("ERR_NODE_STATUS").

Note that exit code 25 was introduced recently as "ERR_CLUSTER_CHECK",
however it makes sense to use this to indicate issues detected by any
command which can detect node issues.

Addresses GitHub #456.
This commit is contained in:
Ian Barwick
2018-07-05 10:47:31 +09:00
parent 29de052dd8
commit 4c7c681a14
7 changed files with 71 additions and 7 deletions
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29
doc/repmgr-cluster-show.sgml
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@@ -113,4 +113,33 @@
</para>
</refsect1>
<refsect1>
<title>Exit codes</title>
<para>
Following exit codes can be emitted by <command>repmgr cluster show</command>:
</para>
<variablelist>
<varlistentry>
<term><option>SUCCESS (0)</option></term>
<listitem>
<para>
No issues were detected.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>ERR_NODE_STATUS (25)</option></term>
<listitem>
<para>
One or more issues were detected.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>