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"standby switchover": check demotion candidate can make replication connection

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Check it's actually possible for the demotion candidate to attach to
the promotion candidate before executing the switchover.

As with other checks of this nature, there's a faint possibility the
situation could change between the time the check is carried out and
the demotion candidate is restarted to connect to the promotion candidate,
but there's not a lot we can do about that. The main purpose is to
be able to catch existing misconfigurations before anything gets changed.

Implements GitHub #370.
This commit is contained in:
Ian Barwick
2018-02-08 16:59:30 +09:00
committed by Ian Barwick
parent 76a93af15c
commit 927bf038a0
6 changed files with 205 additions and 14 deletions
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4
repmgr-client.h
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@@ -83,6 +83,8 @@
#define OPT_CONFIG_ARCHIVE_DIR 1034
#define OPT_HAS_PASSFILE 1035
#define OPT_WAIT_START 1036
#define OPT_REPL_CONN 1037
#define OPT_REMOTE_NODE_ID 1038
/* deprecated since 3.3 */
#define OPT_DATA_DIR 999
@@ -115,6 +117,7 @@ static struct option long_options[] =
{"pgdata", required_argument, NULL, 'D'},
{"node-id", required_argument, NULL, OPT_NODE_ID},
{"node-name", required_argument, NULL, OPT_NODE_NAME},
{"remote-node-id", required_argument, NULL, OPT_REMOTE_NODE_ID},
/* logging options */
{"log-level", required_argument, NULL, 'L'},
@@ -158,6 +161,7 @@ static struct option long_options[] =
{"role", no_argument, NULL, OPT_ROLE},
{"slots", no_argument, NULL, OPT_SLOTS},
{"has-passfile", no_argument, NULL, OPT_HAS_PASSFILE},
{"replication-connection", no_argument, NULL, OPT_REPL_CONN},
/* "node rejoin" options */
{"config-files", required_argument, NULL, OPT_CONFIG_FILES},