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Initial support for cascaded standbys

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This commit is contained in:
Ian Barwick
2015-01-14 14:18:57 +09:00
parent 96f6695a52
commit 5db6489ae5
1 changed files with 21 additions and 36 deletions
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57
repmgr.c
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@@ -63,7 +63,8 @@ static bool copy_configuration(PGconn *masterconn, PGconn *witnessconn);
static void write_primary_conninfo(char *line);
static bool write_recovery_file_line(FILE *recovery_file, char *recovery_file_path, char *line);
static int check_server_version(PGconn *conn, char *server_type, bool exit_on_error, char *server_version_string);
static bool check_master_config(PGconn *conn, bool exit_on_error);
static bool check_upstream_config(PGconn *conn, bool exit_on_error);
static bool create_node_record(PGconn *conn, char *action, int node, char *cluster_name, char *node_name, char *conninfo, int priority, bool witness);
static void do_master_register(void);
@@ -74,7 +75,7 @@ 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 do_check_master_config(void);
static void do_check_upstream_config(void);
static void usage(void);
static void help(const char *progname);
@@ -116,7 +117,7 @@ main(int argc, char **argv)
{"min-recovery-apply-delay", required_argument, NULL, 'r'},
{"verbose", no_argument, NULL, 'v'},
{"initdb-no-pwprompt", no_argument, NULL, 1},
{"check-master-config", no_argument, NULL, 2},
{"check-upstream-config", no_argument, NULL, 2},
{NULL, 0, NULL, 0}
};
@@ -232,7 +233,7 @@ main(int argc, char **argv)
if(check_master_config == true)
{
do_check_master_config();
do_check_upstream_config();
exit(SUCCESS);
}
@@ -865,7 +866,7 @@ do_standby_clone(void)
log_info(_("%s connected to master, checking its state\n"), progname);
check_server_version(conn, "master", true, NULL);
check_master_config(conn, true);
check_upstream_config(conn, true);
sqlquery_snprintf(sqlquery,
"SELECT pg_tablespace_location(oid) spclocation "
@@ -1690,7 +1691,7 @@ help(const char *progname)
printf(_(" -W, --wait wait for a master to appear\n"));
printf(_(" -r, --min-recovery-apply-delay=VALUE enable recovery time delay, value has to be a valid time atom (e.g. 5min)\n"));
printf(_(" --initdb-no-pwprompt don't require superuser password when running initdb\n"));
printf(_(" --check-master-config report problems with master configuration\n"));
printf(_(" --check-upstream-config verify upstream server configuration\n"));
printf(_("\n%s performs some tasks like clone a node, promote it or making follow\n"), progname);
printf(_("another node and then exits.\n\n"));
printf(_("COMMANDS:\n"));
@@ -2363,37 +2364,20 @@ check_server_version(PGconn *conn, char *server_type, bool exit_on_error, char *
/*
* check_master_config()
* check_upstream_config()
*
* Perform sanity check on master configuration
* Perform sanity check on upstream server configuration
*
* TODO: check replication connection is possble
*/
static bool
check_master_config(PGconn *conn, bool exit_on_error)
check_upstream_config(PGconn *conn, bool exit_on_error)
{
int i,
is_standby_retval;
bool config_ok = true;
/* Check we are cloning a primary node */
is_standby_retval = is_standby(conn);
if (is_standby_retval)
{
log_err(_(is_standby_retval == 1 ? "The specified node is in standby state and cannot be used as a master\n" :
"Connection to node lost!\n"));
if(exit_on_error == true)
{
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
config_ok = false;
}
/* XXX check user is qualified to perform base backup */
/* And check if it is well configured */
@@ -2418,7 +2402,7 @@ check_master_config(PGconn *conn, bool exit_on_error)
if (i == 0 || i == -1)
{
if (i == 0)
log_err(_("%s needs parameter 'wal_keep_segments' to be set to %s or greater (see the '-w' option or edit the postgresql.conf of the PostgreSQL master.)\n"),
log_err(_("%s needs parameter 'wal_keep_segments' to be set to %s or greater (see the '-w' option or edit the postgresql.conf of the upstream server.)\n"),
progname, runtime_options.wal_keep_segments);
if(exit_on_error == true)
@@ -2480,13 +2464,14 @@ check_master_config(PGconn *conn, bool exit_on_error)
return config_ok;
}
static void
do_check_master_config(void)
do_check_upstream_config(void)
{
PGconn *conn;
bool config_ok;
/* Connection parameters for master only */
/* Connection parameters for upstream server only */
keywords[0] = "host";
values[0] = runtime_options.host;
keywords[1] = "port";
@@ -2495,18 +2480,18 @@ do_check_master_config(void)
values[2] = runtime_options.dbname;
/* We need to connect to check configuration and start a backup */
log_info(_("%s connecting to master database\n"), progname);
log_info(_("%s connecting to upstream server\n"), progname);
conn = establish_db_connection_by_params(keywords, values, true);
/* Verify that master is a supported server version */
log_info(_("%s connected to master, checking its state\n"), progname);
check_server_version(conn, "master", false, NULL);
/* Verify that upstream server is a supported server version */
log_info(_("%s connected to upstream server, checking its state\n"), progname);
check_server_version(conn, "upstream server", false, NULL);
config_ok = check_master_config(conn, false);
config_ok = check_upstream_config(conn, false);
if(config_ok == true)
{
puts(_("No master configuration problems found"));
puts(_("No configuration problems found with the upstream server"));
}
PQfinish(conn);