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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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8
repmgr-client-global.h
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@@ -68,6 +68,7 @@ typedef struct
int node_id;
char node_name[MAXLEN];
char data_dir[MAXPGPATH];
int remote_node_id;
/* "standby clone" options */
bool copy_external_config_files;
@@ -103,6 +104,7 @@ typedef struct
bool role;
bool slots;
bool has_passfile;
bool replication_connection;
/* "node join" options */
char config_files[MAXLEN];
@@ -139,8 +141,8 @@ typedef struct
"", "", "", "", \
/* other connection options */ \
"", "", \
/* node options */ \
UNKNOWN_NODE_ID, "", "", \
/* general node options */ \
UNKNOWN_NODE_ID, "", "", UNKNOWN_NODE_ID, \
/* "standby clone" options */ \
false, CONFIG_FILE_SAMEPATH, false, false, false, "", "", "", \
false, \
@@ -153,7 +155,7 @@ typedef struct
/* "node status" options */ \
false, \
/* "node check" options */ \
false, false, false, false, false, false, \
false, false, false, false, false, false, false, \
/* "node join" options */ \
"", \
/* "node service" options */ \