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Add general check function "check_replication_slots_available()"

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Make the code previously only used by "standby follow" generally
available - we'll want to use this from "node rejoin" as well.

While we're at it, when reporting failure due to lack of free
replication slots, report the current value of "max_replication_slots".
This commit is contained in:
Ian Barwick
2020-02-03 16:42:04 +09:00
parent ab9c84c655
commit cd7f36a6fd
6 changed files with 48 additions and 25 deletions
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repmgr-client-global.h
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@@ -269,6 +269,7 @@ extern bool can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBuf
extern bool create_replication_slot(PGconn *conn, char *slot_name, t_node_info *upstream_node_record, PQExpBufferData *error_msg);
extern bool drop_replication_slot_if_exists(PGconn *conn, int node_id, char *slot_name);
extern bool check_replication_slots_available(int node_id, PGconn* conn);
extern bool check_node_can_attach(TimeLineID local_tli, XLogRecPtr local_xlogpos, PGconn *follow_target_conn, t_node_info *follow_target_node_record, bool is_rejoin);
extern void check_shared_library(PGconn *conn);
extern bool is_repmgrd_running(PGconn *conn);