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repmgr: improve slot handling in "node rejoin"

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On the rejoined node, if a replication slot for the new upstream exists
(which is typically the case after a failover), delete that slot.

Also emit a warning about any inactive replication slots which may need
to be cleaned up manually.

GitHub #499.
This commit is contained in:
Ian Barwick
2018-08-30 11:18:08 +09:00
parent 3573950425
commit 9681708b1a
4 changed files with 98 additions and 44 deletions
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repmgr-client-global.h
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@@ -237,5 +237,6 @@ extern void get_node_config_directory(char *config_dir_buf);
extern void get_node_data_directory(char *data_dir_buf);
extern void init_node_record(t_node_info *node_record);
extern bool can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *reason);
extern void drop_replication_slot_if_exists(PGconn *conn, int node_id, char *slot_name);
#endif /* _REPMGR_CLIENT_GLOBAL_H_ */