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Add "witness unregister" functionality

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This commit is contained in:
Ian Barwick
2017-11-13 15:40:32 +09:00
parent a6cc4d80f0
commit 022d9c58c2
2 changed files with 115 additions and 12 deletions
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1
dbutils.c
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@@ -1149,6 +1149,7 @@ _get_primary_connection(PGconn *conn,
" CASE WHEN type = 'primary' THEN 1 ELSE 2 END AS type_priority"
" FROM repmgr.nodes "
" WHERE active IS TRUE "
" AND type != 'witness' "
"ORDER BY active DESC, type_priority, priority, node_id");
log_verbose(LOG_DEBUG, "get_primary_connection():\n%s", query.data);

126
repmgr-action-witness.c
View File

@@ -50,7 +50,7 @@ do_witness_register(void)
if (PQstatus(witness_conn) != CONNECTION_OK)
{
log_error(_("unable to connect to local node \"%s\" (ID: %i)"),
log_error(_("unable to connect to witness node \"%s\" (ID: %i)"),
config_file_options.node_name,
config_file_options.node_id);
log_detail("%s",
@@ -204,19 +204,12 @@ do_witness_register(void)
{
if (!runtime_options.force)
{
log_error(_("witness node is already initialised"));
log_error(_("witness node is already initialised and contains node records"));
log_hint(_("use option -F/--force to reinitialise the node"));
PQfinish(primary_conn);
PQfinish(witness_conn);
exit(ERR_BAD_CONFIG);
}
if (truncate_node_records(witness_conn) == false)
{
PQfinish(primary_conn);
PQfinish(witness_conn);
exit(ERR_BAD_CONFIG);
}
}
/* create record on primary */
@@ -227,6 +220,8 @@ do_witness_register(void)
*/
init_node_record(&node_record);
/* these values are mandatory, setting them to anything else has no point */
node_record.type = WITNESS;
node_record.priority = 0;
node_record.upstream_node_id = NO_UPSTREAM_NODE;
@@ -245,8 +240,15 @@ do_witness_register(void)
&node_record);
}
if (record_created == false)
{
log_error(_("unable to create or update node record on primary"));
PQfinish(primary_conn);
PQfinish(witness_conn);
exit(ERR_BAD_CONFIG);
}
/* sync records */
/* sync records from primary */
if (witness_copy_node_records(primary_conn, witness_conn) == false)
{
log_error(_("unable to copy repmgr node records from primary"));
@@ -255,10 +257,10 @@ do_witness_register(void)
exit(ERR_BAD_CONFIG);
}
/* create event */
/* XXX create event */
PQfinish(primary_conn);
PQfinish(witness_conn);
log_info(_("witness registration complete"));
@@ -271,9 +273,109 @@ do_witness_register(void)
void
do_witness_unregister(void)
{
PGconn *witness_conn = NULL;
PGconn *primary_conn = NULL;
int target_node_id;
t_node_info node_record = T_NODE_INFO_INITIALIZER;
RecordStatus record_status = RECORD_NOT_FOUND;
bool node_record_deleted = false;
log_info(_("connecting to witness node \"%s\" (ID: %i)"),
config_file_options.node_name,
config_file_options.node_id);
witness_conn = establish_db_connection_quiet(config_file_options.conninfo);
if (PQstatus(witness_conn) != CONNECTION_OK)
{
log_error(_("unable to connect to witness node \"%s\" (ID: %i)"),
config_file_options.node_name,
config_file_options.node_id);
log_detail("%s", PQerrorMessage(witness_conn));
exit(ERR_BAD_CONFIG);
}
primary_conn = get_primary_connection_quiet(witness_conn, NULL, NULL);
if (PQstatus(primary_conn) != CONNECTION_OK)
{
log_error(_("unable to connect to primary"));
log_detail("%s", PQerrorMessage(primary_conn));
PQfinish(witness_conn);
exit(ERR_BAD_CONFIG);
}
if (runtime_options.node_id != UNKNOWN_NODE_ID)
{
target_node_id = runtime_options.node_id;
}
else
{
target_node_id = config_file_options.node_id;
}
log_verbose(LOG_DEBUG, "target node is %i", target_node_id);
/* Check node exists and is really a witness */
record_status = get_node_record(primary_conn, target_node_id, &node_record);
if (record_status != RECORD_FOUND)
{
log_error(_("no record found for node %i"), target_node_id);
PQfinish(witness_conn);
PQfinish(primary_conn);
exit(ERR_BAD_CONFIG);
}
if (node_record.type != WITNESS)
{
log_error(_("node %i is not a witness node"), target_node_id);
log_detail(_("node %i is a %s node"), target_node_id, get_node_type_string(node_record.type));
PQfinish(witness_conn);
PQfinish(primary_conn);
exit(ERR_BAD_CONFIG);
}
log_info(_("unregistering witness node %i"), target_node_id);
node_record_deleted = delete_node_record(primary_conn,
target_node_id);
if (node_record_deleted == false)
{
PQfinish(primary_conn);
PQfinish(witness_conn);
exit(ERR_BAD_CONFIG);
}
/* sync records from primary */
if (witness_copy_node_records(primary_conn, witness_conn) == false)
{
log_error(_("unable to copy repmgr node records from primary"));
PQfinish(primary_conn);
PQfinish(witness_conn);
exit(ERR_BAD_CONFIG);
}
/* Log the event */
create_event_record(primary_conn,
&config_file_options,
target_node_id,
"witness_unregister",
true,
NULL);
PQfinish(primary_conn);
PQfinish(witness_conn);
log_info(_("witness unregistration complete\n"));
log_detail(_("witness node with id %id (conninfo: %s) successfully unregistered\n"),
target_node_id, config_file_options.conninfo);
return;
}
void do_witness_help(void)
{
return;