github/repmgr
1
0
Fork 0
mirror of https://github.com/EnterpriseDB/repmgr.git synced 2026-03-23 15:16:29 +00:00
Code Issues Packages Projects Releases 1 Wiki Activity

Add configuration option 'event_notification_command'

Browse Source 
Command to be executed each time an event is logged.

Following formatting sequences will be interpolated:

      %e - event type
      %d - description
      %s - success (1 or 0)
      %t - timestamp
This commit is contained in:
Ian Barwick
2015-03-16 13:41:13 +09:00
parent b41235b896
commit 922dfd88e5
6 changed files with 160 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
config.c
View File

@@ -110,7 +110,7 @@ parse_config(const char *config_file, t_configuration_options *options)
return false;
}
/* Initialize */
/* Initialize configuration options with sensible defaults */
memset(options->cluster_name, 0, sizeof(options->cluster_name));
options->node = -1;
options->upstream_node = NO_UPSTREAM_NODE;
@@ -126,16 +126,18 @@ parse_config(const char *config_file, t_configuration_options *options)
memset(options->pgctl_options, 0, sizeof(options->pgctl_options));
memset(options->pg_basebackup_options, 0, sizeof(options->pg_basebackup_options));
/* if nothing has been provided defaults to 60 */
/* default master_response_timeout is 60 seconds */
options->master_response_timeout = 60;
/* it defaults to 6 retries with a time between retries of 10s */
/* default to 6 reconnection attempts at intervals of 10 seconds */
options->reconnect_attempts = 6;
options->reconnect_intvl = 10;
options->monitor_interval_secs = 2;
options->retry_promote_interval_secs = 300;
memset(options->event_notification_command, 0, sizeof(options->event_notification_command));
options->tablespace_mapping.head = NULL;
options->tablespace_mapping.tail = NULL;
@@ -216,6 +218,8 @@ parse_config(const char *config_file, t_configuration_options *options)
options->use_replication_slots = atoi(value);
else if (strcmp(name, "ignore_external_config_files") == 0)
options->ignore_external_config_files = atoi(value);
else if (strcmp(name, "event_notification_command") == 0)
strncpy(options->event_notification_command, value, MAXLEN);
else if (strcmp(name, "tablespace_mapping") == 0)
tablespace_list_append(options, value);
else
@@ -266,7 +270,7 @@ parse_config(const char *config_file, t_configuration_options *options)
exit(ERR_BAD_CONFIG);
}
/* The following checks are for value parameter values */
/* The following checks are for valid parameter values */
if (options->master_response_timeout <= 0)
{
log_err(_("'master_response_timeout' must be greater than zero. Check the configuration file.\n"));
@@ -279,9 +283,9 @@ parse_config(const char *config_file, t_configuration_options *options)
exit(ERR_BAD_CONFIG);
}
if (options->reconnect_intvl <= 0)
if (options->reconnect_intvl < 0)
{
log_err(_("'reconnect_intervals' must be zero or greater. Check the configuration file.\n"));
log_err(_("'reconnect_interval' must be zero or greater. Check the configuration file.\n"));
exit(ERR_BAD_CONFIG);
}

7
config.h
View File

@@ -20,9 +20,11 @@
#ifndef _REPMGR_CONFIG_H_
#define _REPMGR_CONFIG_H_
#include "repmgr.h"
#include "postgres_fe.h"
#include "strutil.h"
typedef struct TablespaceListCell
{
struct TablespaceListCell *next;
@@ -62,10 +64,11 @@ typedef struct
int retry_promote_interval_secs;
int use_replication_slots;
int ignore_external_config_files;
char event_notification_command[MAXLEN];
TablespaceList tablespace_mapping;
} t_configuration_options;
#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, NO_UPSTREAM_NODE, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", -1, -1, -1, "", "", "", "", 0, 0, 0, 0, {NULL, NULL} }
#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, NO_UPSTREAM_NODE, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", -1, -1, -1, "", "", "", "", 0, 0, 0, 0, "", {NULL, NULL} }
bool parse_config(const char *config_file, t_configuration_options *options);

123
dbutils.c
View File

@@ -1060,7 +1060,7 @@ create_node_record(PGconn *conn, char *action, int node, char *type, int upstrea
res = PQexec(conn, sqlquery);
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_warning(_("Cannot insert node details, %s\n"),
log_warning(_("Unable to create node record: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
@@ -1091,7 +1091,7 @@ delete_node_record(PGconn *conn, int node, char *action)
res = PQexec(conn, sqlquery);
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_warning(_("Cannot delete node details, %s\n"),
log_warning(_("Unable to delete node record: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
@@ -1102,11 +1102,24 @@ delete_node_record(PGconn *conn, int node, char *action)
}
/*
* create_event_record()
*
* Insert a record into the events table.
*
* If configuration parameter `event_notification_command` is set, also
* attempt to execute that command.
*
* Returns true if all operations succeeded, false if one or more failed.
*/
bool
create_event_record(PGconn *conn, int node_id, char *event, bool successful, char *details)
create_event_record(PGconn *conn, t_configuration_options *options, int node_id, char *event, bool successful, char *details)
{
char sqlquery[QUERY_STR_LEN];
PGresult *res;
char event_timestamp[MAXLEN] = "";
bool success = true;
int n_node_id = htonl(node_id);
char *t_successful = successful ? "TRUE" : "FALSE";
@@ -1131,7 +1144,8 @@ create_event_record(PGconn *conn, int node_id, char *event, bool successful, cha
" successful, "
" details "
" ) "
" VALUES ($1, $2, $3, $4) ",
" VALUES ($1, $2, $3, $4) "
" RETURNING event_timestamp ",
get_repmgr_schema_quoted(conn));
res = PQexecParams(conn,
@@ -1143,13 +1157,104 @@ create_event_record(PGconn *conn, int node_id, char *event, bool successful, cha
binary,
0);
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_warning(_("Cannot insert event details, %s\n"),
time_t now;
struct tm ts;
log_warning(_("Unable to create event record: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
success = false;
/*
* If the query fails for whatever reason, generate a
* current timestamp ourselves. This isn't quite the same
* format as PostgreSQL, but is close enough for diagnostic use.
*/
time(&now);
ts = *localtime(&now);
strftime(event_timestamp, MAXLEN, "%Y-%m-%d %H:%M:%S%z", &ts);
}
else
{
strncpy(event_timestamp, PQgetvalue(res, 0, 0), MAXLEN);
log_debug(_("Event timestamp is: %s\n"), event_timestamp);
}
return true;
PQclear(res);
/* an event notification command was provided - parse and execute it */
if(strlen(options->event_notification_command))
{
char parsed_command[MAXPGPATH];
const char *src_ptr;
char *dst_ptr;
char *end_ptr;
int r;
dst_ptr = parsed_command;
end_ptr = parsed_command + MAXPGPATH - 1;
*end_ptr = '\0';
for(src_ptr = options->event_notification_command; *src_ptr; src_ptr++)
{
if (*src_ptr == '%')
{
switch (src_ptr[1])
{
case 'e':
/* %e: event type */
src_ptr++;
strlcpy(dst_ptr, event, end_ptr - dst_ptr);
dst_ptr += strlen(dst_ptr);
break;
case 'd':
/* %d: details */
src_ptr++;
if(details != NULL)
{
strlcpy(dst_ptr, details, end_ptr - dst_ptr);
dst_ptr += strlen(dst_ptr);
}
break;
case 's':
/* %s: successful */
src_ptr++;
strlcpy(dst_ptr, successful ? "1" : "0", end_ptr - dst_ptr);
dst_ptr += strlen(dst_ptr);
break;
case 't':
/* %: timestamp */
src_ptr++;
strlcpy(dst_ptr, event_timestamp, end_ptr - dst_ptr);
dst_ptr += strlen(dst_ptr);
break;
default:
/* otherwise treat the % as not special */
if (dst_ptr < end_ptr)
*dst_ptr++ = *src_ptr;
break;
}
}
else
{
if (dst_ptr < end_ptr)
*dst_ptr++ = *src_ptr;
}
}
*dst_ptr = '\0';
log_debug(_("Executing: %s\n"), parsed_command);
r = system(parsed_command);
if (r != 0)
{
log_warning(_("Unable to execute event notification command\n"));
success = false;
}
}
return success;
}

6
dbutils.h
View File

@@ -20,8 +20,10 @@
#ifndef _REPMGR_DBUTILS_H_
#define _REPMGR_DBUTILS_H_
#include "strutil.h"
#include "config.h"
#include "strutil.h"
PGconn *establish_db_connection(const char *conninfo,
const bool exit_on_error);
@@ -64,7 +66,7 @@ bool set_config_bool(PGconn *conn, const char *config_param, bool state);
bool copy_configuration(PGconn *masterconn, PGconn *witnessconn, char *cluster_name);
bool create_node_record(PGconn *conn, char *action, int node, char *type, int upstream_node, char *cluster_name, char *node_name, char *conninfo, int priority, char *slot_name);
bool delete_node_record(PGconn *conn, int node, char *action);
bool create_event_record(PGconn *conn, int node_id, char *event, bool successful, char *details);
bool create_event_record(PGconn *conn, t_configuration_options *options, int node_id, char *event, bool successful, char *details);
#endif

20
repmgr.c
View File

@@ -779,6 +779,7 @@ do_master_register(void)
/* Log the event */
record_created = create_event_record(conn,
&options,
options.node,
"master_register",
true,
@@ -885,6 +886,7 @@ do_standby_register(void)
/* Log the event */
record_created = create_event_record(master_conn,
&options,
options.node,
"standby_register",
true,
@@ -1538,6 +1540,7 @@ log_event(PGconn *standby_conn, bool success, char *details)
NULL, NULL);
retval = create_event_record(primary_conn,
&options,
options.node,
"standby_clone",
success,
@@ -1655,6 +1658,7 @@ do_standby_promote(void)
options.node);
record_created = create_event_record(old_master_conn,
&options,
options.node,
"standby_promote",
false,
@@ -1675,6 +1679,7 @@ do_standby_promote(void)
log_notice(_("STANDBY PROMOTE successful. You should REINDEX any hash indexes you have.\n"));
/* Log the event */
record_created = create_event_record(conn,
&options,
options.node,
"standby_promote",
true,
@@ -1864,6 +1869,7 @@ do_witness_create(void)
log_err("%s\n", errmsg.data);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -1885,6 +1891,7 @@ do_witness_create(void)
log_err("%s\n", errmsg.data);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -1903,6 +1910,7 @@ do_witness_create(void)
runtime_options.host);
log_err("%s\n", errmsg.data);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -1933,6 +1941,7 @@ do_witness_create(void)
char *errmsg = _("unable to initialize cluster for witness server");
log_err("%s\n", errmsg);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -1955,6 +1964,7 @@ do_witness_create(void)
log_err("%s\n", errmsg.data);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2000,6 +2010,7 @@ do_witness_create(void)
log_err("%s\n", errmsg);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2025,6 +2036,7 @@ do_witness_create(void)
log_err("%s\n", errmsg);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2050,6 +2062,7 @@ do_witness_create(void)
log_err("%s\n", errmsg);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2069,6 +2082,7 @@ do_witness_create(void)
log_err("%s\n", errmsg);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2085,6 +2099,7 @@ do_witness_create(void)
log_err("%s\n", errmsg);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2106,6 +2121,7 @@ do_witness_create(void)
log_err("%s\n", errmsg);
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2131,6 +2147,7 @@ do_witness_create(void)
if(record_created == false)
{
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2148,6 +2165,7 @@ do_witness_create(void)
if (!create_schema(witnessconn))
{
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2161,6 +2179,7 @@ do_witness_create(void)
if (!copy_configuration(masterconn, witnessconn, options.cluster_name))
{
create_event_record(masterconn,
&options,
options.node,
"witness_create",
false,
@@ -2192,6 +2211,7 @@ do_witness_create(void)
/* Log the event */
record_created = create_event_record(masterconn,
&options,
options.node,
"witness_create",
true,

7
repmgrd.c
View File

@@ -317,6 +317,7 @@ main(int argc, char **argv)
if(startup_event_logged == false)
{
create_event_record(primary_conn,
&local_options,
local_options.node,
"repmgrd_start",
true,
@@ -411,6 +412,7 @@ main(int argc, char **argv)
if(startup_event_logged == false)
{
create_event_record(primary_conn,
&local_options,
local_options.node,
"repmgrd_start",
true,
@@ -1360,6 +1362,7 @@ do_primary_failover(void)
failed_primary.node_id);
create_event_record(my_local_conn,
&local_options,
node_info.node_id,
"repmgrd_failover_promote",
false,
@@ -1377,6 +1380,7 @@ do_primary_failover(void)
failed_primary.node_id);
create_event_record(my_local_conn,
&local_options,
node_info.node_id,
"repmgrd_failover_promote",
true,
@@ -1424,6 +1428,7 @@ do_primary_failover(void)
PQerrorMessage(new_primary_conn));
create_event_record(new_primary_conn,
&local_options,
node_info.node_id,
"repmgrd_failover_follow",
false,
@@ -1455,6 +1460,7 @@ do_primary_failover(void)
best_candidate.node_id);
create_event_record(new_primary_conn,
&local_options,
node_info.node_id,
"repmgrd_failover_follow",
false,
@@ -1471,6 +1477,7 @@ do_primary_failover(void)
best_candidate.node_id);
create_event_record(new_primary_conn,
&local_options,
node_info.node_id,
"repmgrd_failover_follow",
true,