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Add pg_promote function

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This function is able to promote a standby with this new SQL-callable
function.  Execution access can be granted to non-superusers so that
failover tools can observe the principle of least privilege.

Catalog version is bumped.

Author: Laurenz Albe
Reviewed-by: Michael Paquier, Masahiko Sawada
Discussion: https://postgr.es/m/6e7c79b3ec916cf49742fb8849ed17cd87aed620.camel@cybertec.at
This commit is contained in:
Michael Paquier
2018-10-25 09:46:00 +09:00
parent 0a8590b2a0
commit 10074651e3
13 changed files with 143 additions and 20 deletions
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19
doc/src/sgml/high-availability.sgml
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@@ -1471,14 +1471,17 @@ synchronous_standby_names = 'ANY 2 (s1, s2, s3)'
</para>
<para>
To trigger failover of a log-shipping standby server,
run <command>pg_ctl promote</command> or create a trigger
file with the file name and path specified by the <varname>trigger_file</varname>
setting in <filename>recovery.conf</filename>. If you're planning to use
<command>pg_ctl promote</command> to fail over, <varname>trigger_file</varname> is
not required. If you're setting up the reporting servers that are
only used to offload read-only queries from the primary, not for high
availability purposes, you don't need to promote it.
To trigger failover of a log-shipping standby server, run
<command>pg_ctl promote</command>, call <function>pg_promote</function>,
or create a trigger file with the file name and path specified by the
<varname>trigger_file</varname> setting in
<filename>recovery.conf</filename>. If you're planning to use
<command>pg_ctl promote</command> or to call
<function>pg_promote</function> to fail over,
<varname>trigger_file</varname> is not required. If you're
setting up the reporting servers that are only used to offload read-only
queries from the primary, not for high availability purposes, you don't
need to promote it.
</para>
</sect1>