pg_autoctl_disable_monitor - Man Page

Name

pg_autoctl disable monitor ā€” pg_autoctl disable monitor

pg_autoctl disable monitor ā€” Disable the monitor for this node

Synopsis

It is possible to disable the pg_auto_failover monitor and enable it again online in a running pg_autoctl Postgres node. The main use-cases where this operation is useful is when the monitor node has to be replaced, either after a full crash of the previous monitor node, of for migrating to a new monitor node (hardware replacement, region or zone migration, etc).

 usage: pg_autoctl disable monitor  [ --pgdata --force ]

--pgdata      path to data directory
--force       force unregistering from the monitor

Options

--pgdata

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.

--force

The --force covers the two following situations:

  1. By default, the command expects to be able to connect to the current monitor. When the current known monitor in the setup is not running anymore, use --force to skip this step.
  2. When pg_autoctl could connect to the monitor and the node is found there, this is normally an error that prevents from disabling the monitor. Using --force allows the command to drop the node from the monitor and continue with disabling the monitor.

Examples

$ pg_autoctl show state
    Name |  Node |      Host:Port |       LSN |   Connection |       Current State |      Assigned State
------+-------+----------------+-----------+--------------+---------------------+--------------------
node1 |     1 | localhost:5501 | 0/4000148 |   read-write |             primary |             primary
node2 |     2 | localhost:5502 | 0/4000148 |    read-only |           secondary |           secondary
node3 |     3 | localhost:5503 | 0/4000148 |    read-only |           secondary |           secondary


$ pg_autoctl disable monitor --pgdata node3
12:41:21 43039 INFO  Found node 3 "node3" (localhost:5503) on the monitor
12:41:21 43039 FATAL Use --force to remove the node from the monitor

$ pg_autoctl disable monitor --pgdata node3 --force
12:41:32 43219 INFO  Removing node 3 "node3" (localhost:5503) from monitor

$ 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

Author

Microsoft

Info

Jan 06, 2022 1.6 pg_auto_failover