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Add %v, %u and %t parameters to "failover_validation_command"

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These indicate:
 - the number of visible nodes sharing the current upstream
 - the number of nodes on the current upstream
 - the total number of nodes in the entire repmgr cluster.

This allows the failover_validation_command to be used to perform
more thorough validations, including cross-referencing external
cluster management state (e.g. if managed by kubernetes).

GitHub #651.
This commit is contained in:
Stanislav Paskalev
2020-06-04 15:31:33 +03:00
committed by Ian Barwick
parent f1bdb09512
commit 73e8373337
3 changed files with 75 additions and 15 deletions
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dbutils.h
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@@ -496,6 +496,7 @@ bool get_local_node_record(PGconn *conn, int node_id, t_node_info *node_info);
bool get_primary_node_record(PGconn *conn, t_node_info *node_info);
bool get_all_node_records(PGconn *conn, NodeInfoList *node_list);
bool get_all_nodes_count(PGconn *conn, int *count);
void get_downstream_node_records(PGconn *conn, int node_id, NodeInfoList *nodes);
void get_active_sibling_node_records(PGconn *conn, int node_id, int upstream_node_id, NodeInfoList *node_list);
bool get_child_nodes(PGconn *conn, int node_id, NodeInfoList *node_list);