github/repmgr
1
0
Fork 0
mirror of https://github.com/EnterpriseDB/repmgr.git synced 2026-03-27 17:06:29 +00:00
Code Issues Packages Projects Releases 1 Wiki Activity

repmgr standby follow: initial code

Browse Source
This commit is contained in:
Ian Barwick
2017-06-16 00:05:18 +09:00
parent a69f80a9af
commit 7b976ef2df
5 changed files with 109 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

121
repmgr-action-standby.c
View File

@@ -63,7 +63,7 @@ static void check_barman_config(void);
static void check_source_server(void);
static void check_source_server_via_barman(void);
static void check_master_standby_version_match(PGconn *conn, PGconn *master_conn);
static void check_recovery_type(PGconn *conn);
static void initialise_direct_clone(void);
static void config_file_list_init(t_configfile_list *list, int max_size);
@@ -589,25 +589,7 @@ do_standby_register(void)
if (PQstatus(conn) == CONNECTION_OK)
{
t_recovery_type recovery_type = get_recovery_type(conn);
if (recovery_type != RECTYPE_STANDBY)
{
if (recovery_type == RECTYPE_MASTER)
{
log_error(_("this node should be a standby (%s)"),
config_file_options.conninfo);
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
else
{
log_error(_("connection to node (%s) lost"),
config_file_options.conninfo);
PQfinish(conn);
exit(ERR_DB_CONN);
}
}
check_recovery_type(conn);
}
/* check if there is a master in this cluster */
@@ -1227,10 +1209,82 @@ do_standby_promote(void)
return;
}
/*
* Follow a new primary.
*
* This function has two "modes":
* 1) no primary info provided - determine primary from standby metadata
* 2) primary info provided - use that info to connect to the primary.
*
* (2) is mainly for when a node has been stopped as part of a switchover
* and needs to be started with recovery.conf correctly configured.
*/
void
do_standby_follow(void)
{
puts("not implemented");
PGconn *local_conn;
char data_dir[MAXPGPATH];
log_verbose(LOG_DEBUG, "do_standby_follow()");
/*
* If -h/--host wasn't provided, attempt to connect to standby
* to determine primary, and carry out some other checks while we're
* at it.
*/
if (runtime_options.host_param_provided == false)
{
bool success;
PGconn *master_conn = NULL;
char master_conninfo[MAXLEN];
int master_id = UNKNOWN_NODE_ID;
int timer;
local_conn = establish_db_connection(config_file_options.conninfo, true);
log_verbose(LOG_INFO, _("connected to local node"));
check_recovery_type(local_conn);
success = get_pg_setting(local_conn, "data_directory", data_dir);
if (success == false)
{
log_error(_("unable to determine data directory"));
PQfinish(local_conn);
exit(ERR_BAD_CONFIG);
}
/*
* Attempt to connect to master.
*
* If --wait provided, loop for up `master_response_timeout`
* seconds before giving up
*/
for (timer = 0; timer < config_file_options.master_response_timeout; timer++)
{
master_conn = get_master_connection(local_conn,
&master_id,
(char *) &master_conninfo);
if (PQstatus(master_conn) == CONNECTION_OK || runtime_options.wait == false)
{
break;
}
}
if (PQstatus(master_conn) != CONNECTION_OK)
{
log_error(_("unable to determine master node"));
PQfinish(local_conn);
exit(ERR_BAD_CONFIG);
}
puts("OK");
}
return;
}
@@ -2669,3 +2723,28 @@ check_master_standby_version_match(PGconn *conn, PGconn *master_conn)
exit(ERR_BAD_CONFIG);
}
}
static void
check_recovery_type(PGconn *conn)
{
t_recovery_type recovery_type = get_recovery_type(conn);
if (recovery_type != RECTYPE_STANDBY)
{
if (recovery_type == RECTYPE_MASTER)
{
log_error(_("this node should be a standby (%s)"),
config_file_options.conninfo);
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
else
{
log_error(_("connection to node (%s) lost"),
config_file_options.conninfo);
PQfinish(conn);
exit(ERR_DB_CONN);
}
}
}