1PG_AUTOCTL DROP NODE(1) pg_auto_failover PG_AUTOCTL DROP NODE(1)
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6 pg_autoctl drop node - pg_autoctl drop node
7 pg_autoctl drop node - Drop a node from the pg_auto_failover monitor
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11 This command drops a Postgres node from the pg_auto_failover monitor:
12 usage: pg_autoctl drop node [ [ [ --pgdata ] [ --destroy ] ] | [ --monitor [ [ --hostname --pgport ] | [ --formation --name ] ] ] ]
14 --pgdata path to data directory
16 --monitor pg_auto_failover Monitor Postgres URL
17 --formation pg_auto_failover formation
18 --name drop the node with the given node name
19 --hostname drop the node with given hostname and pgport
20 --pgport drop the node with given hostname and pgport
21 --destroy also destroy Postgres database
22 --force force dropping the node from the monitor
23 --wait how many seconds to wait, default to 60
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26 Two modes of operations are implemented in the pg_autoctl drop node
27 command.
28 When removing a node that still exists, it is possible to use pg_au‐
30 toctl drop node --destroy to remove the node both from the monitor and
31 also delete the local Postgres instance entirely.
32 When removing a node that doesn't exist physically anymore, or when the
34 VM that used to host the node has been lost entirely, use either the
35 pair of options --hostname and --pgport or the pair of options --forma‐
36 tion and --name to match the node registration record on the monitor
37 database, and get it removed from the known list of nodes on the moni‐
38 tor.
39 Then option --force can be used when the target node to remove does not
41 exist anymore. When a node has been lost entirely, it's not going to be
42 able to finish the procedure itself, and it is then possible to in‐
43 struct the monitor of the situation.
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46 --pgdata
47 Location of the Postgres node being managed locally. Defaults to
48 the environment variable PGDATA. Use --monitor to connect to a
49 monitor from anywhere, rather than the monitor URI used by a lo‐
50 cal Postgres node managed with pg_autoctl.
51 --monitor
53 Postgres URI used to connect to the monitor. Must use the au‐
54 toctl_node username and target the pg_auto_failover database
55 name. It is possible to show the Postgres URI from the monitor
56 node using the command pg_autoctl_show_uri.
57 --hostname
59 Hostname of the Postgres node to remove from the monitor. Use
60 either --name or --hostname --pgport, but not both.
61 --pgport
63 Port of the Postgres node to remove from the monitor. Use either
64 --name or --hostname --pgport, but not both.
65 --name Name of the node to remove from the monitor. Use either --name
67 or --hostname --pgport, but not both.
68 --destroy
70 By default the pg_autoctl drop monitor commands does not remove
71 the Postgres database for the monitor. When using --destroy, the
72 Postgres installation is also deleted.
73 --force
75 By default a node is expected to reach the assigned state
76 DROPPED when it is removed from the monitor, and has the oppor‐
77 tunity to implement clean-up actions. When the target node to
78 remove is not available anymore, it is possible to use the op‐
79 tion --force to immediately remove the node from the monitor.
80 --wait How many seconds to wait for the node to be dropped entirely.
82 The command stops when the target node is not to be found on the
83 monitor anymore, or when the timeout has elapsed, whichever
84 comes first. The value 0 (zero) disables the timeout and dis‐
85 ables waiting entirely, making the command async.
86
88 $ pg_autoctl drop node --destroy --pgdata ./node3
89 17:52:21 54201 INFO Reaching assigned state "secondary"
90 17:52:21 54201 INFO Removing node with name "node3" in formation "default" from the monitor
91 17:52:21 54201 WARN Postgres is not running and we are in state secondary
92 17:52:21 54201 WARN Failed to update the keeper's state from the local PostgreSQL instance, see above for details.
93 17:52:21 54201 INFO Calling node_active for node default/4/0 with current state: PostgreSQL is running is false, sync_state is "", latest WAL LSN is 0/0.
94 17:52:21 54201 INFO FSM transition to "dropped": This node is being dropped from the monitor
95 17:52:21 54201 INFO Transition complete: current state is now "dropped"
96 17:52:21 54201 INFO This node with id 4 in formation "default" and group 0 has been dropped from the monitor
97 17:52:21 54201 INFO Stopping PostgreSQL at "/Users/dim/dev/MS/pg_auto_failover/tmux/node3"
98 17:52:21 54201 INFO /Applications/Postgres.app/Contents/Versions/12/bin/pg_ctl --pgdata /Users/dim/dev/MS/pg_auto_failover/tmux/node3 --wait stop --mode fast
99 17:52:21 54201 INFO /Applications/Postgres.app/Contents/Versions/12/bin/pg_ctl status -D /Users/dim/dev/MS/pg_auto_failover/tmux/node3 [3]
100 17:52:21 54201 INFO pg_ctl: no server running
101 17:52:21 54201 INFO pg_ctl stop failed, but PostgreSQL is not running anyway
102 17:52:21 54201 INFO Removing "/Users/dim/dev/MS/pg_auto_failover/tmux/node3"
103 17:52:21 54201 INFO Removing "/Users/dim/dev/MS/pg_auto_failover/tmux/config/pg_autoctl/Users/dim/dev/MS/pg_auto_failover/tmux/node3/pg_autoctl.cfg"
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106 Microsoft
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109 Copyright (c) Microsoft Corporation. All rights reserved.
1101.6 Nov 24, 2021 PG_AUTOCTL DROP NODE(1)