DOKK / manpages / debian 12 / pg-auto-failover-cli / pg_autoctl enable maintenance.1.en
PG_AUTOCTL ENABLE MAINTENANCE(1) pg_auto_failover PG_AUTOCTL ENABLE MAINTENANCE(1)

pg_autoctl enable maintenance - pg_autoctl enable maintenance

pg_autoctl enable maintenance - Enable Postgres maintenance mode on this node

A pg_auto_failover can be put to a maintenance state. The Postgres node is then still registered to the monitor, and is known to be unreliable until maintenance is disabled. A node in the maintenance state is not a candidate for promotion.

Typical use of the maintenance state include Operating System or Postgres reboot, e.g. when applying security upgrades.



 usage: pg_autoctl enable maintenance  [ --pgdata --allow-failover ]
--pgdata      path to data directory


Location of the Postgres node being managed locally. Defaults to the environment variable PGDATA. Use --monitor to connect to a monitor from anywhere, rather than the monitor URI used by a local Postgres node managed with pg_autoctl.
Target formation where to enable secondary feature.

PGDATA

Postgres directory location. Can be used instead of the --pgdata option.


PG_AUTOCTL_MONITOR

Postgres URI to connect to the monitor node, can be used instead of the --monitor option.


XDG_CONFIG_HOME

The pg_autoctl command stores its configuration files in the standard place XDG_CONFIG_HOME. See the XDG Base Directory Specification.


XDG_DATA_HOME

The pg_autoctl command stores its internal states files in the standard place XDG_DATA_HOME, which defaults to ~/.local/share. See the XDG Base Directory Specification.


pg_autoctl show state


 Name |  Node |      Host:Port |       LSN |   Connection |       Current State |      Assigned State
------+-------+----------------+-----------+--------------+---------------------+--------------------
node1 |     1 | localhost:5501 | 0/4000760 |   read-write |             primary |             primary
node2 |     2 | localhost:5502 | 0/4000760 |    read-only |           secondary |           secondary
node3 |     3 | localhost:5503 | 0/4000760 |    read-only |           secondary |           secondary
$ pg_autoctl enable maintenance --pgdata node3
12:06:12 47086 INFO  Listening monitor notifications about state changes in formation "default" and group 0
12:06:12 47086 INFO  Following table displays times when notifications are received


    Time |  Name |  Node |      Host:Port |       Current State |      Assigned State
---------+-------+-------+----------------+---------------------+--------------------
12:06:12 | node1 |     1 | localhost:5501 |             primary |        join_primary
12:06:12 | node3 |     3 | localhost:5503 |           secondary |    wait_maintenance
12:06:12 | node3 |     3 | localhost:5503 |    wait_maintenance |    wait_maintenance
12:06:12 | node1 |     1 | localhost:5501 |        join_primary |        join_primary
12:06:12 | node3 |     3 | localhost:5503 |    wait_maintenance |         maintenance
12:06:12 | node1 |     1 | localhost:5501 |        join_primary |             primary
12:06:13 | node3 |     3 | localhost:5503 |         maintenance |         maintenance
$ pg_autoctl show state


 Name |  Node |      Host:Port |       LSN |   Connection |       Current State |      Assigned State
------+-------+----------------+-----------+--------------+---------------------+--------------------
node1 |     1 | localhost:5501 | 0/4000810 |   read-write |             primary |             primary
node2 |     2 | localhost:5502 | 0/4000810 |    read-only |           secondary |           secondary
node3 |     3 | localhost:5503 | 0/4000810 |         none |         maintenance |         maintenance


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November 6, 2022 2.0