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Write events of note to a log table

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This makes keeping track of events such as failovers
much easier. Note that this is for convenience and is
not a foolproof auditing log.

Sample output:

repmgr_db=# SELECT * from repmgr_test.repl_events ;
 node_id |          event           | successful |        event_timestamp        |                         details
---------+--------------------------+------------+-------------------------------+----------------------------------------------------------
       1 | master_register          | t          | 2015-03-06 14:14:08.196636+09 |
       2 | standby_clone            | t          | 2015-03-06 14:14:17.660768+09 | Backup method: pg_basebackup; --force: N
       2 | standby_register         | t          | 2015-03-06 14:14:18.762222+09 |
       4 | witness_create           | t          | 2015-03-06 14:14:22.072815+09 |
       3 | standby_clone            | t          | 2015-03-06 14:14:23.524673+09 | Backup method: pg_basebackup; --force: N
       3 | standby_register         | t          | 2015-03-06 14:14:24.620161+09 |
       2 | repmgrd_start            | t          | 2015-03-06 14:14:29.639096+09 |
       3 | repmgrd_start            | t          | 2015-03-06 14:14:29.641489+09 |
       4 | repmgrd_start            | t          | 2015-03-06 14:14:29.648002+09 |
       2 | standby_promote          | t          | 2015-03-06 14:15:01.956737+09 | Node 2 was successfully be promoted to master
       2 | repmgrd_failover_promote | t          | 2015-03-06 14:15:01.964771+09 | Node 2 promoted to master; old master 1 marked as failed
       3 | repmgrd_failover_follow  | t          | 2015-03-06 14:15:07.228493+09 | Node 3 now following new upstream node 2
(12 rows)
This commit is contained in:
Ian Barwick
2015-03-06 00:53:29 +09:00
parent 072c2d70ff
commit 491309f4ba
5 changed files with 466 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
dbutils.c
View File

@@ -1016,3 +1016,55 @@ delete_node_record(PGconn *conn, int node, char *action)
return true;
}
bool
create_event_record(PGconn *conn, int node_id, char *event, bool successful, char *details)
{
char sqlquery[QUERY_STR_LEN];
PGresult *res;
int n_node_id = htonl(node_id);
char *t_successful = successful ? "TRUE" : "FALSE";
const char *values[4] = { (char *)&n_node_id,
event,
t_successful,
details
};
int lengths[4] = { sizeof(n_node_id),
0,
0,
0
};
int binary[4] = {1, 0, 0, 0};
sqlquery_snprintf(sqlquery,
" INSERT INTO %s.repl_events ( "
" node_id, "
" event, "
" successful, "
" details "
" ) "
" VALUES ($1, $2, $3, $4) ",
get_repmgr_schema_quoted(conn));
res = PQexecParams(conn,
sqlquery,
4,
NULL,
values,
lengths,
binary,
0);
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_warning(_("Cannot insert event details, %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
return true;
}