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26285b470f23b6aba9af1743393289868e2f2935
repmgr/repmgr-action-node.c
Ian Barwick 1521657965 Update copyright notices to 2018
2018-01-02 10:20:09 +09:00

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/*
* repmgr-action-node.c
*
* Implements actions available for any kind of node
*
* Copyright (c) 2ndQuadrant, 2010-2018
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/stat.h>
#include <dirent.h>
#include "repmgr.h"
#include "controldata.h"
#include "dirutil.h"
#include "dbutils.h"
#include "compat.h"
#include "repmgr-client-global.h"
#include "repmgr-action-node.h"
#include "repmgr-action-standby.h"
static bool copy_file(const char *src_file, const char *dest_file);
static void format_archive_dir(PQExpBufferData *archive_dir);
static t_server_action parse_server_action(const char *action);
static void _do_node_service_list_actions(t_server_action action);
static void _do_node_status_is_shutdown_cleanly(void);
static void _do_node_archive_config(void);
static void _do_node_restore_config(void);
static CheckStatus do_node_check_archive_ready(PGconn *conn, OutputMode mode, CheckStatusList *list_output);
static CheckStatus do_node_check_downstream(PGconn *conn, OutputMode mode, CheckStatusList *list_output);
static CheckStatus do_node_check_replication_lag(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
static CheckStatus do_node_check_role(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
static CheckStatus do_node_check_slots(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
/*
* NODE STATUS
*
* Can only be run on the local node, as it needs to be able to
* read the data directory.
*
* Parameters:
* --is-shutdown-cleanly (for internal use only)
* --csv
*/
void
do_node_status(void)
{
PGconn *conn = NULL;
t_node_info node_info = T_NODE_INFO_INITIALIZER;
char server_version[MAXLEN];
char cluster_size[MAXLEN];
PQExpBufferData output;
KeyValueList node_status = {NULL, NULL};
KeyValueListCell *cell = NULL;
ItemList warnings = {NULL, NULL};
RecoveryType recovery_type = RECTYPE_UNKNOWN;
ReplInfo replication_info = T_REPLINFO_INTIALIZER;
t_recovery_conf recovery_conf = T_RECOVERY_CONF_INITIALIZER;
char data_dir[MAXPGPATH] = "";
if (runtime_options.is_shutdown_cleanly == true)
{
return _do_node_status_is_shutdown_cleanly();
}
/* config file required, so we should have "conninfo" and "data_directory" */
conn = establish_db_connection(config_file_options.conninfo, true);
strncpy(data_dir, config_file_options.data_directory, MAXPGPATH);
server_version_num = get_server_version(conn, NULL);
/* Check node exists and is really a standby */
if (get_node_record(conn, config_file_options.node_id, &node_info) != RECORD_FOUND)
{
log_error(_("no record found for node %i"), config_file_options.node_id);
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
(void) get_server_version(conn, server_version);
if (get_cluster_size(conn, cluster_size) == false)
strncpy(cluster_size, _("unknown"), MAXLEN);
recovery_type = get_recovery_type(conn);
get_node_replication_stats(conn, server_version_num, &node_info);
key_value_list_set(
&node_status,
"PostgreSQL version",
server_version);
key_value_list_set(
&node_status,
"Total data size",
cluster_size);
key_value_list_set(
&node_status,
"Conninfo",
node_info.conninfo);
if (runtime_options.verbose == true)
{
uint64 local_system_identifier = UNKNOWN_SYSTEM_IDENTIFIER;
local_system_identifier = get_system_identifier(config_file_options.data_directory);
key_value_list_set_format(
&node_status,
"System identifier",
"%lu", local_system_identifier);
}
key_value_list_set(
&node_status,
"Role",
get_node_type_string(node_info.type));
switch (node_info.type)
{
case PRIMARY:
if (recovery_type == RECTYPE_STANDBY)
{
item_list_append(
&warnings,
_("- node is registered as primary but running as standby"));
}
break;
case STANDBY:
if (recovery_type == RECTYPE_PRIMARY)
{
item_list_append(
&warnings,
_("- node is registered as standby but running as primary"));
}
break;
case BDR:
default:
break;
}
if (guc_set(conn, "archive_mode", "=", "off"))
{
key_value_list_set(
&node_status,
"WAL archiving",
"off");
key_value_list_set(
&node_status,
"Archive command",
"(none)");
}
else
{
bool enabled = true;
PQExpBufferData archiving_status;
char archive_command[MAXLEN] = "";
initPQExpBuffer(&archiving_status);
if (recovery_type == RECTYPE_STANDBY)
{
if (guc_set(conn, "archive_mode", "=", "on"))
enabled = false;
}
if (enabled == true)
{
appendPQExpBuffer(&archiving_status, "enabled");
}
else
{
appendPQExpBuffer(&archiving_status, "disabled");
}
if (enabled == false && recovery_type == RECTYPE_STANDBY)
{
appendPQExpBuffer(&archiving_status, " (on standbys \"archive_mode\" must be set to \"always\" to be effective)");
}
key_value_list_set(
&node_status,
"WAL archiving",
archiving_status.data);
termPQExpBuffer(&archiving_status);
get_pg_setting(conn, "archive_command", archive_command);
key_value_list_set(
&node_status,
"Archive command",
archive_command);
}
{
int ready_files;
ready_files = get_ready_archive_files(conn, data_dir);
if (runtime_options.output_mode == OM_CSV)
{
key_value_list_set_format(
&node_status,
"WALs pending archiving",
"%i",
ready_files);
}
else
{
key_value_list_set_format(
&node_status,
"WALs pending archiving",
"%i pending files",
ready_files);
}
if (guc_set(conn, "archive_mode", "=", "off"))
{
key_value_list_set_output_mode(&node_status, "WALs pending archiving", OM_CSV);
}
}
if (node_info.max_wal_senders >= 0)
{
/* In CSV mode, raw values supplied as well */
key_value_list_set_format(
&node_status,
"Replication connections",
"%i (of maximal %i)",
node_info.attached_wal_receivers,
node_info.max_wal_senders);
}
else if (node_info.max_wal_senders == 0)
{
key_value_list_set_format(
&node_status,
"Replication connections",
"disabled");
}
if (server_version_num < 90400)
{
key_value_list_set(&node_status,
"Replication slots",
"not available");
}
else if (node_info.max_replication_slots > 0)
{
PQExpBufferData slotinfo;
initPQExpBuffer(&slotinfo);
appendPQExpBuffer(
&slotinfo,
"%i (of maximal %i)",
node_info.active_replication_slots + node_info.inactive_replication_slots,
node_info.max_replication_slots);
if (node_info.inactive_replication_slots > 0)
{
appendPQExpBuffer(&slotinfo,
"; %i inactive",
node_info.inactive_replication_slots);
item_list_append_format(
&warnings,
_("- node has %i inactive replication slots"),
node_info.inactive_replication_slots);
}
key_value_list_set(&node_status,
"Replication slots",
slotinfo.data);
termPQExpBuffer(&slotinfo);
}
else if (node_info.max_replication_slots == 0)
{
key_value_list_set(&node_status,
"Replication slots",
"disabled");
}
if (node_info.type == STANDBY)
{
key_value_list_set_format(&node_status,
"Upstream node",
"%s (ID: %i)",
node_info.node_name,
node_info.node_id);
get_replication_info(conn, &replication_info);
key_value_list_set_format(&node_status,
"Replication lag",
"%i seconds",
replication_info.replication_lag_time);
key_value_list_set_format(&node_status,
"Last received LSN",
"%X/%X", format_lsn(replication_info.last_wal_receive_lsn));
key_value_list_set_format(&node_status,
"Last replayed LSN",
"%X/%X", format_lsn(replication_info.last_wal_replay_lsn));
}
else
{
key_value_list_set(&node_status,
"Upstream node",
"(none)");
key_value_list_set_output_mode(&node_status,
"Upstream node",
OM_CSV);
key_value_list_set(&node_status,
"Replication lag",
"n/a");
key_value_list_set(&node_status,
"Last received LSN",
"(none)");
key_value_list_set_output_mode(&node_status,
"Last received LSN",
OM_CSV);
key_value_list_set(&node_status,
"Last replayed LSN",
"(none)");
key_value_list_set_output_mode(&node_status,
"Last replayed LSN",
OM_CSV);
}
parse_recovery_conf(data_dir, &recovery_conf);
/* format output */
initPQExpBuffer(&output);
if (runtime_options.output_mode == OM_CSV)
{
appendPQExpBuffer(&output,
"\"Node name\",\"%s\"\n",
node_info.node_name);
appendPQExpBuffer(&output,
"\"Node ID\",\"%i\"\n",
node_info.node_id);
for (cell = node_status.head; cell; cell = cell->next)
{
appendPQExpBuffer(&output,
"\"%s\",\"%s\"\n",
cell->key, cell->value);
}
/* we'll add the raw data as well */
appendPQExpBuffer(&output,
"\"max_wal_senders\",%i\n",
node_info.max_wal_senders);
appendPQExpBuffer(&output,
"\"occupied_wal_senders\",%i\n",
node_info.attached_wal_receivers);
appendPQExpBuffer(&output,
"\"max_replication_slots\",%i\n",
node_info.max_replication_slots);
appendPQExpBuffer(&output,
"\"active_replication_slots\",%i\n",
node_info.active_replication_slots);
appendPQExpBuffer(&output,
"\"inactive_replaction_slots\",%i\n",
node_info.inactive_replication_slots);
}
else
{
appendPQExpBuffer(&output,
"Node \"%s\":\n",
node_info.node_name);
for (cell = node_status.head; cell; cell = cell->next)
{
if (cell->output_mode == OM_NOT_SET)
appendPQExpBuffer(&output,
"\t%s: %s\n",
cell->key, cell->value);
}
}
puts(output.data);
termPQExpBuffer(&output);
if (warnings.head != NULL && runtime_options.terse == false)
{
log_warning(_("following issue(s) were detected:"));
print_item_list(&warnings);
/* add this when functionality implemented */
/* log_hint(_("execute \"repmgr node check\" for more details")); */
}
key_value_list_free(&node_status);
item_list_free(&warnings);
PQfinish(conn);
}
/*
* Returns information about the running state of the node.
* For internal use during "standby switchover".
*
* Returns "longopt" output:
*
* --status=(RUNNING|SHUTDOWN|UNCLEAN_SHUTDOWN|UNKNOWN)
* --last-checkpoint=...
*/
static
void
_do_node_status_is_shutdown_cleanly(void)
{
PGPing ping_status;
PQExpBufferData output;
DBState db_state;
XLogRecPtr checkPoint = InvalidXLogRecPtr;
NodeStatus node_status = NODE_STATUS_UNKNOWN;
initPQExpBuffer(&output);
appendPQExpBuffer(
&output,
"--state=");
/* sanity-check we're dealing with a PostgreSQL directory */
if (is_pg_dir(config_file_options.data_directory) == false)
{
appendPQExpBuffer(&output, "UNKNOWN");
printf("%s\n", output.data);
termPQExpBuffer(&output);
return;
}
ping_status = PQping(config_file_options.conninfo);
switch (ping_status)
{
case PQPING_OK:
node_status = NODE_STATUS_UP;
break;
case PQPING_REJECT:
node_status = NODE_STATUS_UP;
break;
case PQPING_NO_ATTEMPT:
case PQPING_NO_RESPONSE:
/* status not yet clear */
break;
}
/* check what pg_controldata says */
db_state = get_db_state(config_file_options.data_directory);
if (db_state != DB_SHUTDOWNED && db_state != DB_SHUTDOWNED_IN_RECOVERY)
{
/*
* node is not running, but pg_controldata says it is - unclean
* shutdown
*/
if (node_status != NODE_STATUS_UP)
{
node_status = NODE_STATUS_UNCLEAN_SHUTDOWN;
}
}
checkPoint = get_latest_checkpoint_location(config_file_options.data_directory);
/* unable to read pg_control, don't know what's happening */
if (checkPoint == InvalidXLogRecPtr)
{
node_status = NODE_STATUS_UNKNOWN;
}
/*
* if still "UNKNOWN" at this point, then the node must be cleanly shut
* down
*/
else if (node_status == NODE_STATUS_UNKNOWN)
{
node_status = NODE_STATUS_DOWN;
}
switch (node_status)
{
case NODE_STATUS_UP:
appendPQExpBuffer(&output, "RUNNING");
break;
case NODE_STATUS_UNCLEAN_SHUTDOWN:
appendPQExpBuffer(&output, "UNCLEAN_SHUTDOWN");
break;
case NODE_STATUS_DOWN:
appendPQExpBuffer(&output,
"SHUTDOWN --last-checkpoint-lsn=%X/%X",
format_lsn(checkPoint));
break;
case NODE_STATUS_UNKNOWN:
appendPQExpBuffer(&output, "UNKNOWN");
break;
}
printf("%s\n", output.data);
termPQExpBuffer(&output);
return;
}
/*
* Configuration file required
*/
void
do_node_check(void)
{
PGconn *conn = NULL;
PQExpBufferData output;
t_node_info node_info = T_NODE_INFO_INITIALIZER;
CheckStatus return_code;
CheckStatusList status_list = {NULL, NULL};
CheckStatusListCell *cell = NULL;
/* internal */
if (runtime_options.has_passfile == true)
{
return_code = has_passfile() ? 0 : 1;
exit(return_code);
}
if (strlen(config_file_options.conninfo))
conn = establish_db_connection(config_file_options.conninfo, true);
else
conn = establish_db_connection_by_params(&source_conninfo, true);
if (get_node_record(conn, config_file_options.node_id, &node_info) != RECORD_FOUND)
{
log_error(_("no record found for node %i"), config_file_options.node_id);
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
server_version_num = get_server_version(conn, NULL);
/* add replication statistics to node record */
get_node_replication_stats(conn, server_version_num, &node_info);
/*
* handle specific checks ======================
*/
if (runtime_options.archive_ready == true)
{
return_code = do_node_check_archive_ready(conn,
runtime_options.output_mode,
NULL);
PQfinish(conn);
exit(return_code);
}
if (runtime_options.downstream == true)
{
return_code = do_node_check_downstream(conn,
runtime_options.output_mode,
NULL);
PQfinish(conn);
exit(return_code);
}
if (runtime_options.replication_lag == true)
{
return_code = do_node_check_replication_lag(conn,
runtime_options.output_mode,
&node_info,
NULL);
PQfinish(conn);
exit(return_code);
}
if (runtime_options.role == true)
{
return_code = do_node_check_role(conn,
runtime_options.output_mode,
&node_info,
NULL);
PQfinish(conn);
exit(return_code);
}
if (runtime_options.slots == true)
{
return_code = do_node_check_slots(conn,
runtime_options.output_mode,
&node_info,
NULL);
PQfinish(conn);
exit(return_code);
}
if (runtime_options.output_mode == OM_NAGIOS)
{
log_error(_("--nagios can only be used with a specific check"));
log_hint(_("execute \"repmgr node --help\" for details"));
PQfinish(conn);
return;
}
/* output general overview */
initPQExpBuffer(&output);
/* order functions are called is also output order */
(void) do_node_check_role(conn, runtime_options.output_mode, &node_info, &status_list);
(void) do_node_check_replication_lag(conn, runtime_options.output_mode, &node_info, &status_list);
(void) do_node_check_archive_ready(conn, runtime_options.output_mode, &status_list);
(void) do_node_check_downstream(conn, runtime_options.output_mode, &status_list);
(void) do_node_check_slots(conn, runtime_options.output_mode, &node_info, &status_list);
if (runtime_options.output_mode == OM_CSV)
{
/* TODO */
}
else
{
appendPQExpBuffer(
&output,
"Node \"%s\":\n",
node_info.node_name);
for (cell = status_list.head; cell; cell = cell->next)
{
appendPQExpBuffer(
&output,
"\t%s: %s",
cell->item,
output_check_status(cell->status));
if (strlen(cell->details))
{
appendPQExpBuffer(
&output,
" (%s)",
cell->details);
}
appendPQExpBuffer(&output, "\n");
}
}
printf("%s", output.data);
termPQExpBuffer(&output);
check_status_list_free(&status_list);
PQfinish(conn);
}
static CheckStatus
do_node_check_role(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output)
{
CheckStatus status = CHECK_STATUS_OK;
PQExpBufferData details;
RecoveryType recovery_type = get_recovery_type(conn);
if (mode == OM_CSV)
{
log_error(_("--csv output not provided with --role option"));
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
initPQExpBuffer(&details);
switch (node_info->type)
{
case PRIMARY:
if (recovery_type == RECTYPE_STANDBY)
{
status = CHECK_STATUS_CRITICAL;
appendPQExpBuffer(&details,
_("node is registered as primary but running as standby"));
}
else
{
appendPQExpBuffer(
&details,
_("node is primary"));
}
break;
case STANDBY:
if (recovery_type == RECTYPE_PRIMARY)
{
status = CHECK_STATUS_CRITICAL;
appendPQExpBuffer(&details,
_("node is registered as standby but running as primary"));
}
else
{
appendPQExpBuffer(&details,
_("node is standby"));
}
break;
case BDR:
{
PQExpBufferData output;
initPQExpBuffer(&output);
if (is_bdr_db(conn, &output) == false)
{
status = CHECK_STATUS_CRITICAL;
appendPQExpBuffer(
&details,
"%s", output.data);
}
termPQExpBuffer(&output);
if (status == CHECK_STATUS_OK)
{
if (is_active_bdr_node(conn, node_info->node_name) == false)
{
status = CHECK_STATUS_CRITICAL;
appendPQExpBuffer(&details,
_("node is not an active BDR node"));
}
}
}
default:
break;
}
switch (mode)
{
case OM_NAGIOS:
printf("REPMGR_SERVER_ROLE %s: %s\n",
output_check_status(status),
details.data);
break;
case OM_TEXT:
if (list_output != NULL)
{
check_status_list_set(list_output,
"Server role",
status,
details.data);
}
else
{
printf("%s (%s)\n",
output_check_status(status),
details.data);
}
default:
break;
}
termPQExpBuffer(&details);
return status;
}
static CheckStatus
do_node_check_slots(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output)
{
CheckStatus status = CHECK_STATUS_OK;
PQExpBufferData details;
initPQExpBuffer(&details);
if (server_version_num < 90400)
{
appendPQExpBuffer(&details,
_("replication slots not available for this PostgreSQL version"));
}
else if (node_info->total_replication_slots == 0)
{
appendPQExpBuffer(&details,
_("node has no replication slots"));
}
else if (node_info->inactive_replication_slots == 0)
{
appendPQExpBuffer(&details,
_("%i of %i replication slots are active"),
node_info->total_replication_slots,
node_info->total_replication_slots);
}
else if (node_info->inactive_replication_slots > 0)
{
status = CHECK_STATUS_CRITICAL;
appendPQExpBuffer(&details,
_("%i of %i replication slots are inactive"),
node_info->inactive_replication_slots,
node_info->total_replication_slots);
}
switch (mode)
{
case OM_NAGIOS:
printf("REPMGR_INACTIVE_SLOTS %s: %s | slots=%i;%i\n",
output_check_status(status),
details.data,
node_info->total_replication_slots,
node_info->inactive_replication_slots);
break;
case OM_TEXT:
if (list_output != NULL)
{
check_status_list_set(list_output,
"Replication slots",
status,
details.data);
}
else
{
printf("%s (%s)\n",
output_check_status(status),
details.data);
}
default:
break;
}
termPQExpBuffer(&details);
return status;
}
static CheckStatus
do_node_check_archive_ready(PGconn *conn, OutputMode mode, CheckStatusList *list_output)
{
int ready_archive_files = 0;
CheckStatus status = CHECK_STATUS_UNKNOWN;
PQExpBufferData details;
if (mode == OM_CSV)
{
log_error(_("--csv output not provided with --archive-ready option"));
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
initPQExpBuffer(&details);
ready_archive_files = get_ready_archive_files(conn, config_file_options.data_directory);
if (ready_archive_files > config_file_options.archive_ready_critical)
{
status = CHECK_STATUS_CRITICAL;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(&details,
"--files=%i --threshold=%i",
ready_archive_files, config_file_options.archive_ready_critical);
break;
case OM_NAGIOS:
appendPQExpBuffer(&details,
"%i pending archive ready files | files=%i;%i;%i",
ready_archive_files,
ready_archive_files,
config_file_options.archive_ready_warning,
config_file_options.archive_ready_critical);
break;
case OM_TEXT:
appendPQExpBuffer(&details,
"%i pending archive ready files, critical threshold: %i",
ready_archive_files, config_file_options.archive_ready_critical);
break;
default:
break;
}
}
else if (ready_archive_files > config_file_options.archive_ready_warning)
{
status = CHECK_STATUS_WARNING;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(&details,
"--files=%i --threshold=%i",
ready_archive_files, config_file_options.archive_ready_warning);
break;
case OM_NAGIOS:
appendPQExpBuffer(&details,
"%i pending archive ready files | files=%i;%i;%i",
ready_archive_files,
ready_archive_files,
config_file_options.archive_ready_warning,
config_file_options.archive_ready_critical);
break;
case OM_TEXT:
appendPQExpBuffer(&details,
"%i pending archive ready files (threshold: %i)",
ready_archive_files, config_file_options.archive_ready_warning);
break;
default:
break;
}
}
else if (ready_archive_files < 0)
{
status = CHECK_STATUS_UNKNOWN;
switch (mode)
{
case OM_OPTFORMAT:
break;
case OM_NAGIOS:
case OM_TEXT:
appendPQExpBuffer(
&details,
"unable to check archive_status directory");
break;
default:
break;
}
}
else
{
status = CHECK_STATUS_OK;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(&details,
"--files=%i", ready_archive_files);
break;
case OM_NAGIOS:
appendPQExpBuffer(&details,
"%i pending archive ready files | files=%i;%i;%i",
ready_archive_files,
ready_archive_files,
config_file_options.archive_ready_warning,
config_file_options.archive_ready_critical);
break;
case OM_TEXT:
appendPQExpBuffer(&details,
"%i pending archive ready files", ready_archive_files);
break;
default:
break;
}
}
switch (mode)
{
case OM_OPTFORMAT:
{
printf("--status=%s %s\n",
output_check_status(status),
details.data);
}
break;
case OM_NAGIOS:
printf("REPMGR_ARCHIVE_READY %s: %s\n",
output_check_status(status),
details.data);
break;
case OM_TEXT:
if (list_output != NULL)
{
check_status_list_set(list_output,
"WAL archiving",
status,
details.data);
}
else
{
printf("%s (%s)\n",
output_check_status(status),
details.data);
}
default:
break;
}
termPQExpBuffer(&details);
return status;
}
static CheckStatus
do_node_check_replication_lag(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output)
{
CheckStatus status = CHECK_STATUS_OK;
int lag_seconds = 0;
PQExpBufferData details;
if (mode == OM_CSV)
{
log_error(_("--csv output not provided with --replication-lag option"));
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
initPQExpBuffer(&details);
if (node_info->recovery_type == RECTYPE_PRIMARY)
{
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
&details,
"--lag=0");
break;
case OM_NAGIOS:
appendPQExpBuffer(
&details,
"0 seconds | lag=0;%i;%i",
config_file_options.replication_lag_warning,
config_file_options.replication_lag_critical);
break;
case OM_TEXT:
appendPQExpBuffer(
&details,
"N/A - node is primary");
break;
default:
break;
}
}
else
{
lag_seconds = get_replication_lag_seconds(conn);
log_debug("lag seconds: %i", lag_seconds);
if (lag_seconds >= config_file_options.replication_lag_critical)
{
status = CHECK_STATUS_CRITICAL;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(&details,
"--lag=%i --threshold=%i",
lag_seconds, config_file_options.replication_lag_critical);
break;
case OM_NAGIOS:
appendPQExpBuffer(&details,
"%i seconds | lag=%i;%i;%i",
lag_seconds,
lag_seconds,
config_file_options.replication_lag_warning,
config_file_options.replication_lag_critical);
break;
case OM_TEXT:
appendPQExpBuffer(&details,
"%i seconds, critical threshold: %i)",
lag_seconds, config_file_options.replication_lag_critical);
break;
default:
break;
}
}
else if (lag_seconds > config_file_options.replication_lag_warning)
{
status = CHECK_STATUS_WARNING;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(&details,
"--lag=%i --threshold=%i",
lag_seconds, config_file_options.replication_lag_warning);
break;
case OM_NAGIOS:
appendPQExpBuffer(&details,
"%i seconds | lag=%i;%i;%i",
lag_seconds,
lag_seconds,
config_file_options.replication_lag_warning,
config_file_options.replication_lag_critical);
break;
case OM_TEXT:
appendPQExpBuffer(&details,
"%i seconds, warning threshold: %i)",
lag_seconds, config_file_options.replication_lag_warning);
break;
default:
break;
}
}
else if (lag_seconds < 0)
{
status = CHECK_STATUS_UNKNOWN;
switch (mode)
{
case OM_OPTFORMAT:
break;
case OM_NAGIOS:
case OM_TEXT:
appendPQExpBuffer(
&details,
"unable to query replication lag");
break;
default:
break;
}
}
else
{
status = CHECK_STATUS_OK;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(&details,
"--lag=%i",
lag_seconds);
break;
case OM_NAGIOS:
appendPQExpBuffer(&details,
"%i seconds | lag=%i;%i;%i",
lag_seconds,
lag_seconds,
config_file_options.replication_lag_warning,
config_file_options.replication_lag_critical);
break;
case OM_TEXT:
appendPQExpBuffer(&details,
"%i seconds",
lag_seconds);
break;
default:
break;
}
}
}
switch (mode)
{
case OM_OPTFORMAT:
{
printf("--status=%s %s\n",
output_check_status(status),
details.data);
}
break;
case OM_NAGIOS:
printf("REPMGR_REPLICATION_LAG %s: %s\n",
output_check_status(status),
details.data);
break;
case OM_TEXT:
if (list_output != NULL)
{
check_status_list_set(list_output,
"Replication lag",
status,
details.data);
}
else
{
printf("%s (%s)\n",
output_check_status(status),
details.data);
}
default:
break;
}
termPQExpBuffer(&details);
return status;
}
/* TODO: ensure only runs on streaming replication nodes */
static CheckStatus
do_node_check_downstream(PGconn *conn, OutputMode mode, CheckStatusList *list_output)
{
NodeInfoList downstream_nodes = T_NODE_INFO_LIST_INITIALIZER;
NodeInfoListCell *cell = NULL;
int missing_nodes_count = 0;
CheckStatus status = CHECK_STATUS_OK;
ItemList missing_nodes = {NULL, NULL};
ItemList attached_nodes = {NULL, NULL};
PQExpBufferData details;
initPQExpBuffer(&details);
get_downstream_node_records(conn, config_file_options.node_id, &downstream_nodes);
for (cell = downstream_nodes.head; cell; cell = cell->next)
{
if (is_downstream_node_attached(conn, cell->node_info->node_name) == false)
{
missing_nodes_count++;
item_list_append_format(&missing_nodes,
"%s (ID: %i)",
cell->node_info->node_name,
cell->node_info->node_id);
}
else
{
item_list_append_format(&attached_nodes,
"%s (ID: %i)",
cell->node_info->node_name,
cell->node_info->node_id);
}
}
if (missing_nodes_count == 0)
{
if (downstream_nodes.node_count == 0)
appendPQExpBuffer(
&details,
"this node has no downstream nodes");
else
appendPQExpBuffer(
&details,
"%i of %i downstream nodes attached",
downstream_nodes.node_count,
downstream_nodes.node_count);
}
else
{
ItemListCell *missing_cell = NULL;
bool first = true;
status = CHECK_STATUS_CRITICAL;
appendPQExpBuffer(
&details,
"%i of %i downstream nodes not attached",
missing_nodes_count,
downstream_nodes.node_count);
if (mode != OM_NAGIOS)
{
appendPQExpBuffer(
&details, "; missing: ");
for (missing_cell = missing_nodes.head; missing_cell; missing_cell = missing_cell->next)
{
if (first == false)
appendPQExpBuffer(
&details,
", ");
else
first = false;
if (first == false)
appendPQExpBuffer(
&details,
"%s", missing_cell->string);
}
}
}
switch (mode)
{
case OM_NAGIOS:
{
printf("REPMGR_DOWNSTREAM_SERVERS %s: %s | ",
output_check_status(status),
details.data);
if (missing_nodes_count)
{
ItemListCell *missing_cell = NULL;
bool first = true;
printf("missing: ");
for (missing_cell = missing_nodes.head; missing_cell; missing_cell = missing_cell->next)
{
if (first == false)
printf(", ");
else
first = false;
if (first == false)
printf("%s", missing_cell->string);
}
}
if (downstream_nodes.node_count - missing_nodes_count)
{
ItemListCell *attached_cell = NULL;
bool first = true;
if (missing_nodes_count)
printf("; ");
printf("attached: ");
for (attached_cell = attached_nodes.head; attached_cell; attached_cell = attached_cell->next)
{
if (first == false)
printf(", ");
else
first = false;
if (first == false)
printf("%s", attached_cell->string);
}
}
printf("\n");
}
break;
case OM_TEXT:
if (list_output != NULL)
{
check_status_list_set(list_output,
"Downstream servers",
status,
details.data);
}
else
{
printf("%s (%s)\n",
output_check_status(status),
details.data);
}
default:
break;
}
termPQExpBuffer(&details);
clear_node_info_list(&downstream_nodes);
return status;
}
void
do_node_service(void)
{
t_server_action action = ACTION_UNKNOWN;
char data_dir[MAXPGPATH] = "";
char command[MAXLEN] = "";
PQExpBufferData output;
action = parse_server_action(runtime_options.action);
if (action == ACTION_UNKNOWN)
{
log_error(_("unknown value \"%s\" provided for parameter --action"),
runtime_options.action);
log_hint(_("valid values are \"start\", \"stop\", \"restart\", \"reload\" and \"promote\""));
exit(ERR_BAD_CONFIG);
}
if (runtime_options.list_actions == true)
{
return _do_node_service_list_actions(action);
}
if (data_dir_required_for_action(action))
{
get_node_data_directory(data_dir);
if (data_dir[0] == '\0')
{
log_error(_("unable to determine data directory for action"));
exit(ERR_BAD_CONFIG);
}
}
if ((action == ACTION_STOP || action == ACTION_RESTART) && runtime_options.checkpoint == true)
{
if (runtime_options.dry_run == true)
{
log_info(_("a CHECKPOINT would be issued here"));
}
else
{
PGconn *conn = NULL;
if (strlen(config_file_options.conninfo))
conn = establish_db_connection(config_file_options.conninfo, true);
else
conn = establish_db_connection_by_params(&source_conninfo, true);
log_notice(_("issuing CHECKPOINT"));
/* check superuser conn! */
checkpoint(conn);
PQfinish(conn);
}
}
get_server_action(action, command, data_dir);
if (runtime_options.dry_run == true)
{
log_info(_("would execute server command \"%s\""), command);
return;
}
/*
* log level is "DETAIL" here as this command is intended to be executed
* by another repmgr process (e.g. during standby switchover); that repmgr
* should emit a "NOTICE" about the intent of the command.
*/
log_detail(_("executing server command \"%s\""), command);
initPQExpBuffer(&output);
if (local_command(command, &output) == false)
{
termPQExpBuffer(&output);
exit(ERR_LOCAL_COMMAND);
}
termPQExpBuffer(&output);
}
static void
_do_node_service_list_actions(t_server_action action)
{
char command[MAXLEN] = "";
char data_dir[MAXPGPATH] = "";
bool data_dir_required = false;
/* do we need to provide a data directory for any of the actions? */
if (data_dir_required_for_action(ACTION_START))
data_dir_required = true;
if (data_dir_required_for_action(ACTION_STOP))
data_dir_required = true;
if (data_dir_required_for_action(ACTION_RESTART))
data_dir_required = true;
if (data_dir_required_for_action(ACTION_RELOAD))
data_dir_required = true;
if (data_dir_required_for_action(ACTION_PROMOTE))
data_dir_required = true;
if (data_dir_required == true)
{
get_node_data_directory(data_dir);
}
/* show command for specific action only */
if (action != ACTION_NONE)
{
get_server_action(action, command, data_dir);
printf("%s\n", command);
return;
}
puts(_("Following commands would be executed for each action:"));
puts("");
get_server_action(ACTION_START, command, data_dir);
printf(" start: \"%s\"\n", command);
get_server_action(ACTION_STOP, command, data_dir);
printf(" stop: \"%s\"\n", command);
get_server_action(ACTION_RESTART, command, data_dir);
printf(" restart: \"%s\"\n", command);
get_server_action(ACTION_RELOAD, command, data_dir);
printf(" reload: \"%s\"\n", command);
get_server_action(ACTION_PROMOTE, command, data_dir);
printf(" promote: \"%s\"\n", command);
puts("");
}
static t_server_action
parse_server_action(const char *action_name)
{
if (action_name[0] == '\0')
return ACTION_NONE;
if (strcasecmp(action_name, "start") == 0)
return ACTION_START;
if (strcasecmp(action_name, "stop") == 0)
return ACTION_STOP;
if (strcasecmp(action_name, "restart") == 0)
return ACTION_RESTART;
if (strcasecmp(action_name, "reload") == 0)
return ACTION_RELOAD;
if (strcasecmp(action_name, "promote") == 0)
return ACTION_PROMOTE;
return ACTION_UNKNOWN;
}
/*
* Intended mainly for "internal" use by "standby switchover", which
* calls this on the target server to excute pg_rewind on a demoted
* primary with a forked (sic) timeline. This function does not
* currently check whether this is a useful thing to do (however
* "standby switchover" will perform a check before calling it).
*
* TODO: make this into a more generally useful function.
*/
void
do_node_rejoin(void)
{
PGconn *upstream_conn = NULL;
RecoveryType upstream_recovery_type = RECTYPE_UNKNOWN;
DBState db_state;
PGPing status;
bool is_shutdown = true;
PQExpBufferData command;
PQExpBufferData command_output;
PQExpBufferData follow_output;
struct stat statbuf;
t_node_info primary_node_record = T_NODE_INFO_INITIALIZER;
bool success = true;
int server_version_num = UNKNOWN_SERVER_VERSION_NUM;
/* check node is not actually running */
status = PQping(config_file_options.conninfo);
switch (status)
{
case PQPING_NO_ATTEMPT:
log_error(_("unable to determine status of server"));
exit(ERR_BAD_CONFIG);
case PQPING_OK:
is_shutdown = false;
break;
case PQPING_REJECT:
is_shutdown = false;
break;
case PQPING_NO_RESPONSE:
/* status not yet clear */
break;
}
db_state = get_db_state(config_file_options.data_directory);
if (is_shutdown == false)
{
log_error(_("database is still running in state \"%s\""),
describe_db_state(db_state));
log_hint(_("\"repmgr node rejoin\" cannot be executed on a running node"));
exit(ERR_BAD_CONFIG);
}
/* check if cleanly shut down */
if (db_state != DB_SHUTDOWNED && db_state != DB_SHUTDOWNED_IN_RECOVERY)
{
log_error(_("database is not shut down cleanly"));
if (runtime_options.force_rewind == true)
{
log_detail(_("pg_rewind will not be able to run"));
}
log_hint(_("database should be restarted and shut down cleanly after crash recovery completes"));
exit(ERR_BAD_CONFIG);
}
/* check provided upstream connection */
upstream_conn = establish_db_connection_by_params(&source_conninfo, true);
/* sanity-checks for 9.3 */
server_version_num = get_server_version(upstream_conn, NULL);
if (server_version_num < 90400)
check_93_config();
if (get_primary_node_record(upstream_conn, &primary_node_record) == false)
{
log_error(_("unable to retrieve primary node record"));
PQfinish(upstream_conn);
}
PQfinish(upstream_conn);
/* connect to registered primary and check it's not in recovery */
upstream_conn = establish_db_connection(primary_node_record.conninfo, true);
upstream_recovery_type = get_recovery_type(upstream_conn);
if (upstream_recovery_type != RECTYPE_PRIMARY)
{
log_error(_("primary server is registered node \"%s\" (ID: %i), but server is not a primary"),
primary_node_record.node_name,
primary_node_record.node_id);
/* TODO: hint about checking cluster */
PQfinish(upstream_conn);
exit(ERR_BAD_CONFIG);
}
/*
* If --force-rewind specified, check pg_rewind can be used, and
* pre-emptively fetch the list of configuration files which should be
* archived
*/
if (runtime_options.force_rewind == true)
{
PQExpBufferData reason;
PQExpBufferData msg;
initPQExpBuffer(&reason);
if (can_use_pg_rewind(upstream_conn, config_file_options.data_directory, &reason) == false)
{
log_error(_("--force-rewind specified but pg_rewind cannot be used"));
log_detail("%s", reason.data);
termPQExpBuffer(&reason);
PQfinish(upstream_conn);
exit(ERR_BAD_CONFIG);
}
termPQExpBuffer(&reason);
initPQExpBuffer(&msg);
appendPQExpBuffer(&msg,
_("prerequisites for using pg_rewind are met"));
if (runtime_options.dry_run == true)
{
log_info("%s", msg.data);
}
else
{
log_verbose(LOG_INFO, "%s", msg.data);
}
termPQExpBuffer(&msg);
}
/*
* Forcibly rewind node if requested (this is mainly for use when this
* action is being executed by "repmgr standby switchover")
*/
if (runtime_options.force_rewind == true)
{
int ret;
PQExpBufferData filebuf;
_do_node_archive_config();
/* execute pg_rewind */
initPQExpBuffer(&command);
appendPQExpBuffer(&command,
"%s -D ",
make_pg_path("pg_rewind"));
appendShellString(&command,
config_file_options.data_directory);
appendPQExpBuffer(&command,
" --source-server='%s'",
primary_node_record.conninfo);
if (runtime_options.dry_run == true)
{
log_info(_("pg_rewind would now be executed"));
log_detail(_("pg_rewind command is:\n %s"),
command.data);
PQfinish(upstream_conn);
exit(SUCCESS);
}
log_notice(_("executing pg_rewind"));
log_debug("pg_rewind command is:\n %s",
command.data);
initPQExpBuffer(&command_output);
ret = local_command(
command.data,
&command_output);
termPQExpBuffer(&command);
if (ret == false)
{
log_error(_("unable to execute pg_rewind"));
log_detail("%s", command_output.data);
termPQExpBuffer(&command_output);
exit(ERR_BAD_CONFIG);
}
termPQExpBuffer(&command_output);
/* Restore any previously archived config files */
_do_node_restore_config();
initPQExpBuffer(&filebuf);
/* remove any recovery.done file copied in by pg_rewind */
appendPQExpBuffer(&filebuf,
"%s/recovery.done",
config_file_options.data_directory);
if (stat(filebuf.data, &statbuf) == 0)
{
log_verbose(LOG_INFO, _("deleting \"recovery.done\""));
if (unlink(filebuf.data) == -1)
{
log_warning(_("unable to delete \"%s\""),
filebuf.data);
log_detail("%s", strerror(errno));
}
}
termPQExpBuffer(&filebuf);
/* delete any replication slots copied in by pg_rewind */
{
PQExpBufferData slotdir_path;
DIR *slotdir;
struct dirent *slotdir_ent;
initPQExpBuffer(&slotdir_path);
appendPQExpBuffer(&slotdir_path,
"%s/pg_replslot",
config_file_options.data_directory);
slotdir = opendir(slotdir_path.data);
if (slotdir == NULL)
{
log_warning(_("unable to open replication slot directory \"%s\""),
slotdir_path.data);
log_detail("%s", strerror(errno));
}
else
{
while ((slotdir_ent = readdir(slotdir)) != NULL) {
struct stat statbuf;
PQExpBufferData slotdir_ent_path;
if(strcmp(slotdir_ent->d_name, ".") == 0 || strcmp(slotdir_ent->d_name, "..") == 0)
continue;
initPQExpBuffer(&slotdir_ent_path);
appendPQExpBuffer(&slotdir_ent_path,
"%s/%s",
slotdir_path.data,
slotdir_ent->d_name);
if (stat(slotdir_ent_path.data, &statbuf) == 0 && !S_ISDIR(statbuf.st_mode))
{
termPQExpBuffer(&slotdir_ent_path);
continue;
}
log_debug("deleting slot directory \"%s\"", slotdir_ent_path.data);
if (rmdir_recursive(slotdir_ent_path.data) != 0 && errno != EEXIST)
{
log_warning(_("unable to delete replication slot directory \"%s\""), slotdir_ent_path.data);
log_detail("%s", strerror(errno));
log_hint(_("directory may need to be manually removed"));
}
termPQExpBuffer(&slotdir_ent_path);
}
}
termPQExpBuffer(&slotdir_path);
}
}
initPQExpBuffer(&follow_output);
success = do_standby_follow_internal(upstream_conn,
&primary_node_record,
&follow_output);
create_event_notification(upstream_conn,
&config_file_options,
config_file_options.node_id,
"node_rejoin",
success,
follow_output.data);
PQfinish(upstream_conn);
if (success == false)
{
log_notice(_("NODE REJOIN failed"));
log_detail("%s", follow_output.data);
termPQExpBuffer(&follow_output);
exit(ERR_DB_QUERY);
}
log_notice(_("NODE REJOIN successful"));
log_detail("%s", follow_output.data);
termPQExpBuffer(&follow_output);
}
/*
* For "internal" use by `node rejoin` on the local node when
* called by "standby switchover" from the remote node.
*
* This archives any configuration files in the data directory, which may be
* overwritten by pg_rewind.
*
* Requires configuration file, optionally --config-archive-dir
*/
static void
_do_node_archive_config(void)
{
PQExpBufferData archive_dir;
struct stat statbuf;
struct dirent *arcdir_ent;
DIR *arcdir;
KeyValueList config_files = {NULL, NULL};
KeyValueListCell *cell = NULL;
int copied_count = 0;
initPQExpBuffer(&archive_dir);
format_archive_dir(&archive_dir);
/* sanity-check directory path */
if (stat(archive_dir.data, &statbuf) == -1)
{
if (errno != ENOENT)
{
log_error(_("error encountered when checking archive directory \"%s\""),
archive_dir.data);
log_detail("%s", strerror(errno));
termPQExpBuffer(&archive_dir);
exit(ERR_BAD_CONFIG);
}
/* attempt to create and open the directory */
if (mkdir(archive_dir.data, S_IRWXU) != 0 && errno != EEXIST)
{
log_error(_("unable to create temporary archive directory \"%s\""),
archive_dir.data);
log_detail("%s", strerror(errno));
termPQExpBuffer(&archive_dir);
exit(ERR_BAD_CONFIG);
}
}
else if (!S_ISDIR(statbuf.st_mode))
{
log_error(_("\"%s\" exists but is not a directory"),
archive_dir.data);
termPQExpBuffer(&archive_dir);
exit(ERR_BAD_CONFIG);
}
arcdir = opendir(archive_dir.data);
if (arcdir == NULL)
{
log_error(_("unable to open archive directory \"%s\""),
archive_dir.data);
log_detail("%s", strerror(errno));
termPQExpBuffer(&archive_dir);
exit(ERR_BAD_CONFIG);
}
if (runtime_options.dry_run == false)
{
/*
* attempt to remove any existing files in the directory TODO: collate
* problem files into list
*/
while ((arcdir_ent = readdir(arcdir)) != NULL)
{
PQExpBufferData arcdir_ent_path;
initPQExpBuffer(&arcdir_ent_path);
appendPQExpBuffer(&arcdir_ent_path,
"%s/%s",
archive_dir.data,
arcdir_ent->d_name);
if (stat(arcdir_ent_path.data, &statbuf) == 0 && !S_ISREG(statbuf.st_mode))
{
termPQExpBuffer(&arcdir_ent_path);
continue;
}
if (unlink(arcdir_ent_path.data) == -1)
{
log_error(_("unable to delete file in temporary archive directory"));
log_detail(_("file is: \"%s\""), arcdir_ent_path.data);
log_detail("%s", strerror(errno));
closedir(arcdir);
termPQExpBuffer(&arcdir_ent_path);
exit(ERR_BAD_CONFIG);
}
termPQExpBuffer(&arcdir_ent_path);
}
closedir(arcdir);
}
/*
* extract list of config files from --config-files
*/
{
int i = 0;
int j = 0;
int config_file_len = strlen(runtime_options.config_files);
char filenamebuf[MAXPGPATH] = "";
PQExpBufferData pathbuf;
for (j = 0; j < config_file_len; j++)
{
if (runtime_options.config_files[j] == ',')
{
int filename_len = j - i;
if (filename_len > MAXPGPATH)
filename_len = MAXPGPATH - 1;
strncpy(filenamebuf, runtime_options.config_files + i, filename_len);
filenamebuf[filename_len] = '\0';
initPQExpBuffer(&pathbuf);
appendPQExpBuffer(&pathbuf,
"%s/%s",
config_file_options.data_directory,
filenamebuf);
key_value_list_set(&config_files,
filenamebuf,
pathbuf.data);
termPQExpBuffer(&pathbuf);
i = j + 1;
}
}
if (i < config_file_len)
{
strncpy(filenamebuf, runtime_options.config_files + i, config_file_len - i);
initPQExpBuffer(&pathbuf);
appendPQExpBuffer(&pathbuf,
"%s/%s",
config_file_options.data_directory,
filenamebuf);
key_value_list_set(&config_files,
filenamebuf,
pathbuf.data);
termPQExpBuffer(&pathbuf);
}
}
for (cell = config_files.head; cell; cell = cell->next)
{
PQExpBufferData dest_file;
initPQExpBuffer(&dest_file);
appendPQExpBuffer(&dest_file,
"%s/%s",
archive_dir.data,
cell->key);
if (stat(cell->value, &statbuf) == -1)
{
log_warning(_("specified file \"%s\" not found, skipping"),
cell->value);
}
else
{
if (runtime_options.dry_run == true)
{
log_info("file \"%s\" would be copied to \"%s\"",
cell->key, dest_file.data);
copied_count++;
}
else
{
log_verbose(LOG_DEBUG, "copying \"%s\" to \"%s\"",
cell->key, dest_file.data);
copy_file(cell->value, dest_file.data);
copied_count++;
}
}
termPQExpBuffer(&dest_file);
}
if (runtime_options.dry_run == true)
{
log_verbose(LOG_INFO, _("%i files would have been copied to \"%s\""),
copied_count, archive_dir.data);
}
else
{
log_verbose(LOG_INFO, _("%i files copied to \"%s\""),
copied_count, archive_dir.data);
}
if (runtime_options.dry_run == true)
{
/*
* Delete directory in --dry-run mode - it should be empty unless it's been
* interfered with for some reason, in which case manual intervention is
* required
*/
if (rmdir(archive_dir.data) != 0 && errno != EEXIST)
{
log_warning(_("unable to delete directory \"%s\""), archive_dir.data);
log_detail("%s", strerror(errno));
log_hint(_("directory may need to be manually removed"));
}
else
{
log_verbose(LOG_INFO, "directory \"%s\" deleted", archive_dir.data);
}
}
termPQExpBuffer(&archive_dir);
}
/*
* Intended mainly for "internal" use by `standby switchover`, which
* calls this on the target server to restore any configuration files
* to the data directory, which may have been overwritten by an operation
* like pg_rewind
*
* Not designed to be called if the instance is running, but does
* not currently check.
*
* Requires -D/--pgdata, optionally --config-archive-dir
*
* Removes --config-archive-dir after successful copy
*/
static void
_do_node_restore_config(void)
{
PQExpBufferData archive_dir;
DIR *arcdir;
struct dirent *arcdir_ent;
int copied_count = 0;
bool copy_ok = true;
initPQExpBuffer(&archive_dir);
format_archive_dir(&archive_dir);
arcdir = opendir(archive_dir.data);
if (arcdir == NULL)
{
log_error(_("unable to open archive directory \"%s\""),
archive_dir.data);
log_detail("%s", strerror(errno));
termPQExpBuffer(&archive_dir);
exit(ERR_BAD_CONFIG);
}
while ((arcdir_ent = readdir(arcdir)) != NULL)
{
struct stat statbuf;
PQExpBufferData src_file_path;
PQExpBufferData dest_file_path;
initPQExpBuffer(&src_file_path);
appendPQExpBuffer(&src_file_path,
"%s/%s",
archive_dir.data,
arcdir_ent->d_name);
/* skip non-files */
if (stat(src_file_path.data, &statbuf) == 0 && !S_ISREG(statbuf.st_mode))
{
termPQExpBuffer(&src_file_path);
continue;
}
initPQExpBuffer(&dest_file_path);
appendPQExpBuffer(&dest_file_path,
"%s/%s",
config_file_options.data_directory,
arcdir_ent->d_name);
log_verbose(LOG_DEBUG, "copying \"%s\" to \"%s\"",
src_file_path.data, dest_file_path.data);
if (copy_file(src_file_path.data, dest_file_path.data) == false)
{
copy_ok = false;
log_warning(_("unable to copy \"%s\" to \"%s\""),
arcdir_ent->d_name, runtime_options.data_dir);
}
else
{
unlink(src_file_path.data);
copied_count++;
}
termPQExpBuffer(&dest_file_path);
termPQExpBuffer(&src_file_path);
}
closedir(arcdir);
log_notice(_("%i files copied to %s"),
copied_count,
config_file_options.data_directory);
if (copy_ok == false)
{
log_warning(_("unable to copy all files from \"%s\""), archive_dir.data);
}
else
{
/*
* Finally, delete directory - it should be empty unless it's been
* interfered with for some reason, in which case manual intervention is
* required
*/
if (rmdir(archive_dir.data) != 0 && errno != EEXIST)
{
log_warning(_("unable to delete directory \"%s\""), archive_dir.data);
log_detail("%s", strerror(errno));
log_hint(_("directory may need to be manually removed"));
}
else
{
log_verbose(LOG_INFO, "directory \"%s\" deleted", archive_dir.data);
}
}
termPQExpBuffer(&archive_dir);
return;
}
static void
format_archive_dir(PQExpBufferData *archive_dir)
{
appendPQExpBuffer(archive_dir,
"%s/repmgr-config-archive-%s",
runtime_options.config_archive_dir,
config_file_options.node_name);
log_verbose(LOG_DEBUG, "using archive directory \"%s\"", archive_dir->data);
}
static bool
copy_file(const char *src_file, const char *dest_file)
{
FILE *ptr_old,
*ptr_new;
int a = 0;
ptr_old = fopen(src_file, "r");
ptr_new = fopen(dest_file, "w");
if (ptr_old == NULL)
return false;
if (ptr_new == NULL)
{
fclose(ptr_old);
return false;
}
chmod(dest_file, S_IRUSR | S_IWUSR);
while (1)
{
a = fgetc(ptr_old);
if (!feof(ptr_old))
{
fputc(a, ptr_new);
}
else
{
break;
}
}
fclose(ptr_new);
fclose(ptr_old);
return true;
}
void
do_node_help(void)
{
print_help_header();
printf(_("Usage:\n"));
printf(_(" %s [OPTIONS] node status\n"), progname());
printf(_(" %s [OPTIONS] node check\n"), progname());
printf(_(" %s [OPTIONS] node rejoin\n"), progname());
printf(_(" %s [OPTIONS] node service\n"), progname());
puts("");
printf(_("NODE STATUS\n"));
puts("");
printf(_(" \"node status\" displays an overview of a node's basic information and replication status.\n"));
puts("");
printf(_(" Configuration file required, runs on local node only.\n"));
puts("");
printf(_(" --csv emit output as CSV\n"));
puts("");
printf(_("NODE CHECK\n"));
puts("");
printf(_(" \"node check\" performs some health checks on a node from a replication perspective.\n"));
puts("");
printf(_(" Configuration file required, runs on local node only.\n"));
puts("");
printf(_(" --csv emit output as CSV\n"));
printf(_(" --nagios emit output in Nagios format (individual status output only)\n"));
puts("");
printf(_(" Following options check an individual status:\n"));
printf(_(" --archive-ready number of WAL files ready for archiving\n"));
printf(_(" --downstream whether all downstream nodes are connected\n"));
printf(_(" --replication-lag replication lag in seconds (standbys only)\n"));
printf(_(" --role check node has expected role\n"));
printf(_(" --slots check for inactive replication slots\n"));
puts("");
printf(_("NODE REJOIN\n"));
puts("");
printf(_(" \"node rejoin\" enables a dormant (stopped) node to be rejoined to the replication cluster.\n"));
puts("");
printf(_(" Configuration file required, runs on local node only.\n"));
puts("");
printf(_(" --dry-run check that the prerequisites are met for rejoining the node\n" \
" (including usability of \"pg_rewind\" if requested)\n"));
printf(_(" --force-rewind execute \"pg_rewind\" if necessary\n"));
printf(_(" --config-files comma-separated list of configuration files to retain\n" \
" after executing \"pg_rewind\"\n"));
printf(_(" --config-archive-dir directory to temporarily store retained configuration files\n" \
" (default: /tmp)\n"));
puts("");
printf(_("NODE SERVICE\n"));
puts("");
printf(_(" \"node service\" executes a system service command to stop/start/restart/reload a node\n" \
" or optionally display which command would be executed\n"));
puts("");
printf(_(" Configuration file required, runs on local node only.\n"));
puts("");
printf(_(" --dry-run show what action would be performed, but don't execute it\n"));
printf(_(" --action action to perform (one of \"start\", \"stop\", \"restart\" or \"reload\")\n"));
printf(_(" --list-actions show what command would be performed for each action\n"));
puts("");
}
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