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Add function to execute "IDENTIFY_SYSTEM"

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This commit is contained in:
Ian Barwick
2017-08-11 22:01:02 +09:00
parent f972aec198
commit 50b82f785e
4 changed files with 57 additions and 0 deletions
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22
dbutils.c
View File

@@ -1442,6 +1442,28 @@ get_replication_lag_seconds(PGconn *conn)
} }
bool
identify_system(PGconn *replconn, t_system_identification *identification)
{
PGresult *res;
res = PQexec(replconn, "IDENTIFY_SYSTEM;");
if (PQresultStatus(res) != PGRES_TUPLES_OK || !PQntuples(res))
{
PQclear(res);
return false;
}
strncpy(identification->systemid, PQgetvalue(res, 0, 0), MAXLEN);
identification->timeline = atoi(PQgetvalue(res, 0, 1));
identification->xlogpos = parse_lsn(PQgetvalue(res, 0, 2));
PQclear(res);
return true;
}
/* ================ */ /* ================ */
/* result functions */ /* result functions */
/* ================ */ /* ================ */

12
dbutils.h
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@@ -264,7 +264,18 @@ typedef struct
#define T_CONFIGFILE_LIST_INITIALIZER { 0, 0, NULL } #define T_CONFIGFILE_LIST_INITIALIZER { 0, 0, NULL }
typedef struct
{
char systemid[MAXLEN];
int timeline;
XLogRecPtr xlogpos;
} t_system_identification;
#define T_SYSTEM_IDENTIFICATION_INITIALIZER { \
"", \
UNKNOWN_TIMELINE_ID, \
InvalidXLogRecPtr \
}
/* global variables */ /* global variables */
extern int server_version_num; extern int server_version_num;
@@ -333,6 +344,7 @@ RecoveryType get_recovery_type(PGconn *conn);
int get_primary_node_id(PGconn *conn); int get_primary_node_id(PGconn *conn);
bool can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *reason); bool can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *reason);
int get_ready_archive_files(PGconn *conn, const char *data_directory); int get_ready_archive_files(PGconn *conn, const char *data_directory);
bool identify_system(PGconn *replconn, t_system_identification *identification);
/* extension functions */ /* extension functions */
ExtensionStatus get_repmgr_extension_status(PGconn *conn); ExtensionStatus get_repmgr_extension_status(PGconn *conn);

22
repmgr-action-node.c
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@@ -96,6 +96,28 @@ do_node_status(void)
get_node_replication_stats(conn, &node_info); get_node_replication_stats(conn, &node_info);
/* get system information */
{
t_conninfo_param_list repl_conninfo;
PGconn *replication_conn;
t_system_identification sysid = T_SYSTEM_IDENTIFICATION_INITIALIZER;
initialize_conninfo_params(&repl_conninfo, false);
conn_to_param_list(conn, &repl_conninfo);
param_set(&repl_conninfo, "replication", "1");
param_set(&repl_conninfo, "user", node_info.repluser);
replication_conn = establish_db_connection_by_params(&repl_conninfo, false);
identify_system(replication_conn, &sysid);
printf("%s\n", sysid.systemid);
exit(0);
}
key_value_list_set( key_value_list_set(
&node_status, &node_status,
"PostgreSQL version", "PostgreSQL version",

1
repmgr.h
View File

@@ -33,6 +33,7 @@
#define REPLICATION_TYPE_BDR 2 #define REPLICATION_TYPE_BDR 2
#define UNKNOWN_SERVER_VERSION_NUM -1 #define UNKNOWN_SERVER_VERSION_NUM -1
#define UNKNOWN_TIMELINE_ID -1
#define NODE_NOT_FOUND -1 #define NODE_NOT_FOUND -1
#define NO_UPSTREAM_NODE -1 #define NO_UPSTREAM_NODE -1