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Add a CLUSTER CLEANUP command to clean monitor's history,

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also include a --keep-history (-k) option to indicate how many
days of history to keep
This commit is contained in:
Jaime Casanova
2012-06-13 00:39:54 -05:00
parent 7a76f1998c
commit 64fce88e99
3 changed files with 113 additions and 6 deletions
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81
repmgr.c
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@@ -8,6 +8,7 @@
* Commands implemented are.
* MASTER REGISTER
* STANDBY REGISTER, STANDBY CLONE, STANDBY FOLLOW, STANDBY PROMOTE
* CLUSTER SHOW, CLUSTER CLEANUP
* WITNESS CREATE
*
* This program is free software: you can redistribute it and/or modify
@@ -48,6 +49,7 @@
#define STANDBY_FOLLOW 5
#define WITNESS_CREATE 6
#define CLUSTER_SHOW 7
#define CLUSTER_CLEANUP 8
static bool create_recovery_file(const char *data_dir);
static int test_ssh_connection(char *host, char *remote_user);
@@ -65,6 +67,7 @@ static void do_standby_promote(void);
static void do_standby_follow(void);
static void do_witness_create(void);
static void do_cluster_show(void);
static void do_cluster_cleanup(void);
static void usage(void);
static void help(const char *progname);
@@ -80,7 +83,7 @@ bool need_a_node = true;
bool require_password = false;
/* Initialization of runtime options */
t_runtime_options runtime_options = { "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, "" };
t_runtime_options runtime_options = { "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, "", 0 };
t_configuration_options options = { "", -1, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", -1 };
static char *server_mode = NULL;
@@ -100,6 +103,7 @@ main(int argc, char **argv)
{"config-file", required_argument, NULL, 'f'},
{"remote-user", required_argument, NULL, 'R'},
{"wal-keep-segments", required_argument, NULL, 'w'},
{"keep-history", required_argument, NULL, 'k'},
{"force", no_argument, NULL, 'F'},
{"ignore-rsync-warning", no_argument, NULL, 'I'},
{"verbose", no_argument, NULL, 'v'},
@@ -127,7 +131,7 @@ main(int argc, char **argv)
}
while ((c = getopt_long(argc, argv, "d:h:p:U:D:l:f:R:w:F:I:v", long_options,
while ((c = getopt_long(argc, argv, "d:h:p:U:D:l:f:R:w:k:F:I:v", long_options,
&optindex)) != -1)
{
switch (c)
@@ -162,6 +166,12 @@ main(int argc, char **argv)
if (atoi(optarg) > 0)
strncpy(runtime_options.wal_keep_segments, optarg, MAXLEN);
break;
case 'k':
if (atoi(optarg) > 0)
runtime_options.keep_history = atoi(optarg);
else
runtime_options.keep_history = 0;
break;
case 'F':
runtime_options.force = true;
break;
@@ -182,7 +192,7 @@ main(int argc, char **argv)
* MASTER REGISTER |
* STANDBY {REGISTER | CLONE [node] | PROMOTE | FOLLOW [node]} |
* WITNESS CREATE
* CLUSTER SHOW
* CLUSTER {SHOW | CLEANUP}
*
* the node part is optional, if we receive it then we shouldn't
* have received a -h option
@@ -223,6 +233,8 @@ main(int argc, char **argv)
{
if( strcasecmp(server_cmd, "SHOW") == 0)
action = CLUSTER_SHOW;
else if(strcasecmp(server_cmd, "CLEANUP") == 0)
action = CLUSTER_CLEANUP;
}
else if (strcasecmp(server_mode, "WITNESS") == 0)
if (strcasecmp(server_cmd, "CREATE") == 0)
@@ -348,6 +360,9 @@ main(int argc, char **argv)
case CLUSTER_SHOW:
do_cluster_show();
break;
case CLUSTER_CLEANUP:
do_cluster_cleanup();
break;
default:
usage();
exit(ERR_BAD_CONFIG);
@@ -402,10 +417,59 @@ do_cluster_show(void)
}
PQclear(res);
}
static void
do_cluster_cleanup(void)
{
int master_id;
PGconn *master_conn;
PGresult *res;
char sqlquery[QUERY_STR_LEN];
char node_role[MAXLEN];
int i;
/* check if there is a master in this cluster */
log_info(_("%s connecting to master database\n"), progname);
master_conn = getMasterConnection(master_conn, repmgr_schema, options.cluster_name,
&master_id, NULL);
if (!master_conn)
{
log_err(_("cluster cleanup: cannot connect to master\n"));
exit(ERR_DB_CON);
}
if (runtime_options.keep_history > 0)
{
sqlquery_snprintf(sqlquery, "DELETE FROM %s.repl_monitor "
" WHERE age(now(), last_monitor_time) >= '%d days'::interval;",
repmgr_schema, keep_history);
}
else
{
sqlquery_snprintf(sqlquery, "TRUNCATE TABLE %s.repl_monitor;", repmgr_schema);
}
res = PQexec(conn, sqlquery);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("cluster cleanup: Couldn't clean history\n%s\n"), PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
PQclear(res);
/* Let's VACUUM the table to avoid autovacuum to be launched in an unexpected hour */
sqlquery_snprintf(sqlquery, "VACUUM %s.repl_monitor;", repmgr_schema);
res = PQexec(conn, sqlquery);
/* XXX There is any need to check this VACUUM happens without problems? */
PQclear(res);
PQfinish(conn);
}
static void
do_master_register(void)
{
@@ -1642,7 +1706,7 @@ help(const char *progname)
printf(_(" %s [OPTIONS] master {register}\n"), progname);
printf(_(" %s [OPTIONS] standby {register|clone|promote|follow}\n"),
progname);
printf(_(" %s [OPTIONS] cluster show\n"), progname);
printf(_(" %s [OPTIONS] cluster {show|cleanup}\n"), progname);
printf(_("\nGeneral options:\n"));
printf(_(" --help show this help, then exit\n"));
printf(_(" --version output version information, then exit\n"));
@@ -1659,6 +1723,7 @@ help(const char *progname)
printf(_(" -R, --remote-user=USERNAME database server username for rsync\n"));
printf(_(" -w, --wal-keep-segments=VALUE minimum value for the GUC wal_keep_segments (default: 5000)\n"));
printf(_(" -I, --ignore-rsync-warning ignore rsync partial transfer warning\n"));
printf(_(" -k, --keep-history=VALUE keeps indicated number of days of history\n"));
printf(_(" -F, --force force potentially dangerous operations to happen\n"));
printf(_("\n%s performs some tasks like clone a node, promote it "), progname);
@@ -1671,6 +1736,7 @@ help(const char *progname)
printf(_("new master in the event of a failover\n"));
printf(_(" standby follow - allows the standby to re-point itself to a new master\n"));
printf(_(" cluster show - print node informations\n"));
printf(_(" cluster cleanup - cleans monitor's history\n"));
}
@@ -1935,6 +2001,9 @@ check_parameters_for_action(const int action)
case CLUSTER_SHOW:
/* allow all parameters to be supplied */
break;
case CLUSTER_CLEANUP:
/* allow all parameters to be supplied */
break;
}
return ok;