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witness unregister: enable execution when witness server is down

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Also add help output for "repmgr witness --help".
This commit is contained in:
Ian Barwick
2017-11-13 20:45:10 +09:00
parent c907b7b33d
commit 6131c1d8ce
2 changed files with 94 additions and 38 deletions
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130
repmgr-action-witness.c
View File

@@ -28,6 +28,9 @@
#include "repmgr-client-global.h"
#include "repmgr-action-witness.h"
static char repmgr_user[MAXLEN];
static char repmgr_db[MAXLEN];
void
do_witness_register(void)
{
@@ -39,9 +42,6 @@ do_witness_register(void)
RecordStatus record_status = RECORD_NOT_FOUND;
bool record_created = false;
char repmgr_user[MAXLEN];
char repmgr_db[MAXLEN];
log_info(_("connecting to witness node \"%s\" (ID: %i)"),
config_file_options.node_name,
config_file_options.node_id);
@@ -196,7 +196,7 @@ do_witness_register(void)
* if repmgr.nodes contains entries, delete if -F/--force provided,
* otherwise exit with error
*/
get_all_node_records(primary_conn, &nodes);
get_all_node_records(witness_conn, &nodes);
log_verbose(LOG_DEBUG, "%i node records found", nodes.node_count);
@@ -212,6 +212,8 @@ do_witness_register(void)
}
}
clear_node_info_list(&nodes);
/* create record on primary */
/*
@@ -257,8 +259,13 @@ do_witness_register(void)
exit(ERR_BAD_CONFIG);
}
/* XXX create event */
/* create event */
create_event_record(primary_conn,
&config_file_options,
config_file_options.node_id,
"witness_register",
true,
NULL);
PQfinish(primary_conn);
PQfinish(witness_conn);
@@ -270,15 +277,16 @@ do_witness_register(void)
return;
}
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;
bool witness_available = true;
log_info(_("connecting to witness node \"%s\" (ID: %i)"),
config_file_options.node_name,
@@ -288,41 +296,64 @@ do_witness_unregister(void)
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);
if (!runtime_options.force)
{
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));
log_hint(_("provide -F/--force to remove the witness record if the server is not running"));
exit(ERR_BAD_CONFIG);
}
log_notice(_("unable to connect to witness node \"%s\" (ID: %i), removing node record on cluster primary only"),
config_file_options.node_name,
config_file_options.node_id);
witness_available = false;
}
primary_conn = get_primary_connection_quiet(witness_conn, NULL, NULL);
if (witness_available == true)
{
primary_conn = get_primary_connection_quiet(witness_conn, NULL, NULL);
}
else
{
/*
* Extract the repmgr user and database names from the conninfo string
* provided in repmgr.conf
*/
get_conninfo_value(config_file_options.conninfo, "user", repmgr_user);
get_conninfo_value(config_file_options.conninfo, "dbname", repmgr_db);
param_set_ine(&source_conninfo, "user", repmgr_user);
param_set_ine(&source_conninfo, "dbname", repmgr_db);
primary_conn = establish_db_connection_by_params(&source_conninfo, false);
}
if (PQstatus(primary_conn) != CONNECTION_OK)
{
log_error(_("unable to connect to primary"));
log_detail("%s", PQerrorMessage(primary_conn));
PQfinish(witness_conn);
if (witness_available == true)
{
PQfinish(witness_conn);
}
else
{
log_hint(_("provide connection details to primary server"));
}
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);
record_status = get_node_record(primary_conn, config_file_options.node_id, &node_record);
if (record_status != RECORD_FOUND)
{
log_error(_("no record found for node %i"), target_node_id);
log_error(_("no record found for node %i"), config_file_options.node_id);
PQfinish(witness_conn);
PQfinish(primary_conn);
exit(ERR_BAD_CONFIG);
@@ -330,16 +361,16 @@ do_witness_unregister(void)
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));
log_error(_("node %i is not a witness node"), config_file_options.node_id);
log_detail(_("node %i is a %s node"), config_file_options.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);
log_info(_("unregistering witness node %i"), config_file_options.node_id);
node_record_deleted = delete_node_record(primary_conn,
target_node_id);
config_file_options.node_id);
if (node_record_deleted == false)
{
@@ -349,7 +380,7 @@ do_witness_unregister(void)
}
/* sync records from primary */
if (witness_copy_node_records(primary_conn, witness_conn) == false)
if (witness_available == true && witness_copy_node_records(primary_conn, witness_conn) == false)
{
log_error(_("unable to copy repmgr node records from primary"));
PQfinish(primary_conn);
@@ -360,17 +391,19 @@ do_witness_unregister(void)
/* Log the event */
create_event_record(primary_conn,
&config_file_options,
target_node_id,
config_file_options.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);
if (witness_available == true)
PQfinish(witness_conn);
log_info(_("witness unregistration complete"));
log_detail(_("witness node with id %i (conninfo: %s) successfully unregistered"),
config_file_options.node_id, config_file_options.conninfo);
return;
}
@@ -378,6 +411,27 @@ do_witness_unregister(void)
void do_witness_help(void)
{
print_help_header();
printf(_("Usage:\n"));
printf(_(" %s [OPTIONS] witness register\n"), progname());
printf(_(" %s [OPTIONS] witness unregister\n"), progname());
printf(_("WITNESS REGISTER\n"));
puts("");
printf(_(" \"witness register\" registers a witness node.\n"));
puts("");
printf(_(" Requires provision of the primary connection information\n"));
puts("");
printf(_(" -F, --force overwrite an existing node record\n"));
puts("");
printf(_("WITNESS UNREGISTER\n"));
puts("");
printf(_(" \"witness register\" unregisters a witness node.\n"));
puts("");
printf(_(" -F, --force unregister when witness node not running\n"));
puts("");
return;
}

2
repmgr-client.c
View File

@@ -1404,6 +1404,8 @@ check_cli_parameters(const int action)
case STANDBY_CLONE:
case STANDBY_FOLLOW:
case STANDBY_REGISTER:
case WITNESS_REGISTER:
case WITNESS_UNREGISTER:
case CLUSTER_SHOW:
case CLUSTER_MATRIX:
case CLUSTER_CROSSCHECK: