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repmgrd: restrict BDR monitoring to two node setup

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It's not safe to have more than two nodes with this kind of
"failover", so we don't need to select alternative nodes by
priority.
This commit is contained in:
Ian Barwick
2017-07-14 12:56:11 +09:00
parent 91c7013024
commit e3b3fb65f0
12 changed files with 96 additions and 212 deletions
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23
dbutils.c
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@@ -14,6 +14,11 @@
#include "catalog/pg_control.h"
/* mainly for use by repmgrd */
int server_version_num = 0;
static PGconn *_establish_db_connection(const char *conninfo,
const bool exit_on_error,
const bool log_notice,
@@ -1501,8 +1506,6 @@ get_active_sibling_node_records(PGconn *conn, int node_id, int upstream_node_id,
PQExpBufferData query;
PGresult *res;
clear_node_info_list(node_list);
initPQExpBuffer(&query);
appendPQExpBuffer(&query,
@@ -1535,8 +1538,6 @@ get_node_records_by_priority(PGconn *conn, NodeInfoList *node_list)
PQExpBufferData query;
PGresult *res;
clear_node_info_list(node_list);
initPQExpBuffer(&query);
appendPQExpBuffer(
@@ -1696,7 +1697,7 @@ update_node_record_set_active(PGconn *conn, int this_node_id, bool active)
appendPQExpBuffer(
&query,
"UPDATE repmgr.nodes SET active = %s "
" WHERE id = %i",
" WHERE node_id = %i",
active == true ? "TRUE" : "FALSE",
this_node_id);
@@ -1878,7 +1879,7 @@ update_node_record_conn_priority(PGconn *conn, t_configuration_options *options)
"UPDATE repmgr.nodes "
" SET conninfo = '%s', "
" priority = %d "
" WHERE id = %d ",
" WHERE node_id = %d ",
options->conninfo,
options->priority,
options->node_id);
@@ -1929,14 +1930,13 @@ delete_node_record(PGconn *conn, int node)
}
void
clear_node_info_list(NodeInfoList *nodes)
{
NodeInfoListCell *cell;
NodeInfoListCell *next_cell;
log_debug("clear_node_info_list() - closing open connections");
log_verbose(LOG_DEBUG, "clear_node_info_list() - closing open connections");
/* close any open connections */
for (cell = nodes->head; cell; cell = cell->next)
@@ -1948,7 +1948,7 @@ clear_node_info_list(NodeInfoList *nodes)
}
}
log_debug("clear_node_info_list() - unlinking");
log_verbose(LOG_DEBUG, "clear_node_info_list() - unlinking");
cell = nodes->head;
@@ -1959,6 +1959,7 @@ clear_node_info_list(NodeInfoList *nodes)
pfree(cell);
cell = next_cell;
}
nodes->head = NULL;
nodes->tail = NULL;
nodes->node_count = 0;
@@ -3134,9 +3135,7 @@ void _populate_bdr_node_records(PGresult *res, BdrNodeInfoList *node_list)
{
int i;
node_list->head = NULL;
node_list->tail = NULL;
node_list->node_count = 0;
clear_node_info_list(node_list);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{