2 * collectd - src/postgresql.c
3 * Copyright (C) 2008-2012 Sebastian Harl
4 * Copyright (C) 2009 Florian Forster
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * - Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * - Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
31 * Sebastian Harl <sh at tokkee.org>
32 * Florian Forster <octo at verplant.org>
36 * This module collects PostgreSQL database statistics.
42 #include "configfile.h"
45 #include "utils_cache.h"
46 #include "utils_db_query.h"
47 #include "utils_complain.h"
53 #include <pg_config_manual.h>
56 #define log_err(...) ERROR ("postgresql: " __VA_ARGS__)
57 #define log_warn(...) WARNING ("postgresql: " __VA_ARGS__)
58 #define log_info(...) INFO ("postgresql: " __VA_ARGS__)
59 #define log_debug(...) DEBUG ("postgresql: " __VA_ARGS__)
61 #ifndef C_PSQL_DEFAULT_CONF
62 # define C_PSQL_DEFAULT_CONF PKGDATADIR "/postgresql_default.conf"
65 /* Appends the (parameter, value) pair to the string
66 * pointed to by 'buf' suitable to be used as argument
67 * for PQconnectdb(). If value equals NULL, the pair
69 #define C_PSQL_PAR_APPEND(buf, buf_len, parameter, value) \
70 if ((0 < (buf_len)) && (NULL != (value)) && ('\0' != *(value))) { \
71 int s = ssnprintf (buf, buf_len, " %s = '%s'", parameter, value); \
78 /* Returns the tuple (major, minor, patchlevel)
79 * for the given version number. */
80 #define C_PSQL_SERVER_VERSION3(server_version) \
81 (server_version) / 10000, \
82 (server_version) / 100 - (int)((server_version) / 10000) * 100, \
83 (server_version) - (int)((server_version) / 100) * 100
85 /* Returns true if the given host specifies a
86 * UNIX domain socket. */
87 #define C_PSQL_IS_UNIX_DOMAIN_SOCKET(host) \
88 ((NULL == (host)) || ('\0' == *(host)) || ('/' == *(host)))
90 /* Returns the tuple (host, delimiter, port) for a
91 * given (host, port) pair. Depending on the value of
92 * 'host' a UNIX domain socket or a TCP socket is
94 #define C_PSQL_SOCKET3(host, port) \
95 ((NULL == (host)) || ('\0' == *(host))) ? DEFAULT_PGSOCKET_DIR : host, \
96 C_PSQL_IS_UNIX_DOMAIN_SOCKET (host) ? "/.s.PGSQL." : ":", \
100 C_PSQL_PARAM_HOST = 1,
103 C_PSQL_PARAM_INTERVAL,
104 C_PSQL_PARAM_INSTANCE,
107 /* Parameter configuration. Stored as `user data' in the query objects. */
109 c_psql_param_t *params;
111 } c_psql_user_data_t;
121 c_complain_t conn_complaint;
128 /* user configuration */
129 udb_query_preparation_area_t **q_prep_areas;
130 udb_query_t **queries;
133 c_psql_writer_t **writers;
136 /* make sure we don't access the database object in parallel */
137 pthread_mutex_t db_lock;
141 /* writer "caching" settings */
142 cdtime_t commit_interval;
143 cdtime_t next_commit;
144 cdtime_t expire_delay;
163 static char *def_queries[] = {
172 static int def_queries_num = STATIC_ARRAY_SIZE (def_queries);
174 static c_psql_database_t **databases = NULL;
175 static size_t databases_num = 0;
177 static udb_query_t **queries = NULL;
178 static size_t queries_num = 0;
180 static c_psql_writer_t *writers = NULL;
181 static size_t writers_num = 0;
183 static int c_psql_begin (c_psql_database_t *db)
185 PGresult *r = PQexec (db->conn, "BEGIN");
190 if (PGRES_COMMAND_OK == PQresultStatus (r)) {
191 db->next_commit = cdtime() + db->commit_interval;
195 log_warn ("Failed to initiate ('BEGIN') transaction: %s",
196 PQerrorMessage (db->conn));
202 static int c_psql_commit (c_psql_database_t *db)
204 PGresult *r = PQexec (db->conn, "COMMIT");
209 if (PGRES_COMMAND_OK == PQresultStatus (r)) {
211 log_debug ("Successfully committed transaction.");
215 log_warn ("Failed to commit transaction: %s",
216 PQerrorMessage (db->conn));
220 } /* c_psql_commit */
222 static c_psql_database_t *c_psql_database_new (const char *name)
224 c_psql_database_t **tmp;
225 c_psql_database_t *db;
227 db = (c_psql_database_t *)malloc (sizeof(*db));
229 log_err ("Out of memory.");
233 tmp = (c_psql_database_t **)realloc (databases,
234 (databases_num + 1) * sizeof (*databases));
236 log_err ("Out of memory.");
242 databases[databases_num] = db;
247 C_COMPLAIN_INIT (&db->conn_complaint);
249 db->proto_version = 0;
250 db->server_version = 0;
252 db->max_params_num = 0;
254 db->q_prep_areas = NULL;
261 pthread_mutex_init (&db->db_lock, /* attrs = */ NULL);
265 db->commit_interval = 0;
267 db->expire_delay = 0;
269 db->database = sstrdup (name);
275 db->instance = sstrdup (name);
279 db->krbsrvname = NULL;
285 } /* c_psql_database_new */
287 static void c_psql_database_delete (void *data)
291 c_psql_database_t *db = data;
294 /* readers and writers may access this database */
298 /* wait for the lock to be released by the last writer */
299 pthread_mutex_lock (&db->db_lock);
301 if (db->next_commit > 0)
307 if (db->q_prep_areas)
308 for (i = 0; i < db->queries_num; ++i)
309 udb_query_delete_preparation_area (db->q_prep_areas[i]);
310 free (db->q_prep_areas);
318 pthread_mutex_unlock (&db->db_lock);
320 pthread_mutex_destroy (&db->db_lock);
322 sfree (db->database);
326 sfree (db->password);
328 sfree (db->instance);
332 sfree (db->krbsrvname);
336 /* don't care about freeing or reordering the 'databases' array
337 * this is done in 'shutdown'; also, don't free the database instance
338 * object just to make sure that in case anybody accesses it before
339 * shutdown won't segfault */
341 } /* c_psql_database_delete */
343 static int c_psql_connect (c_psql_database_t *db)
346 char *buf = conninfo;
347 int buf_len = sizeof (conninfo);
350 if ((! db) || (! db->database))
353 status = ssnprintf (buf, buf_len, "dbname = '%s'", db->database);
359 C_PSQL_PAR_APPEND (buf, buf_len, "host", db->host);
360 C_PSQL_PAR_APPEND (buf, buf_len, "port", db->port);
361 C_PSQL_PAR_APPEND (buf, buf_len, "user", db->user);
362 C_PSQL_PAR_APPEND (buf, buf_len, "password", db->password);
363 C_PSQL_PAR_APPEND (buf, buf_len, "sslmode", db->sslmode);
364 C_PSQL_PAR_APPEND (buf, buf_len, "krbsrvname", db->krbsrvname);
365 C_PSQL_PAR_APPEND (buf, buf_len, "service", db->service);
367 db->conn = PQconnectdb (conninfo);
368 db->proto_version = PQprotocolVersion (db->conn);
370 } /* c_psql_connect */
372 static int c_psql_check_connection (c_psql_database_t *db)
379 /* trigger c_release() */
380 if (0 == db->conn_complaint.interval)
381 db->conn_complaint.interval = 1;
386 if (CONNECTION_OK != PQstatus (db->conn)) {
389 /* trigger c_release() */
390 if (0 == db->conn_complaint.interval)
391 db->conn_complaint.interval = 1;
393 if (CONNECTION_OK != PQstatus (db->conn)) {
394 c_complain (LOG_ERR, &db->conn_complaint,
395 "Failed to connect to database %s (%s): %s",
396 db->database, db->instance,
397 PQerrorMessage (db->conn));
401 db->proto_version = PQprotocolVersion (db->conn);
404 db->server_version = PQserverVersion (db->conn);
406 if (c_would_release (&db->conn_complaint)) {
410 server_host = PQhost (db->conn);
411 server_version = PQserverVersion (db->conn);
413 c_do_release (LOG_INFO, &db->conn_complaint,
414 "Successfully %sconnected to database %s (user %s) "
415 "at server %s%s%s (server version: %d.%d.%d, "
416 "protocol version: %d, pid: %d)", init ? "" : "re",
417 PQdb (db->conn), PQuser (db->conn),
418 C_PSQL_SOCKET3 (server_host, PQport (db->conn)),
419 C_PSQL_SERVER_VERSION3 (server_version),
420 db->proto_version, PQbackendPID (db->conn));
422 if (3 > db->proto_version)
423 log_warn ("Protocol version %d does not support parameters.",
427 } /* c_psql_check_connection */
429 static PGresult *c_psql_exec_query_noparams (c_psql_database_t *db,
432 return PQexec (db->conn, udb_query_get_statement (q));
433 } /* c_psql_exec_query_noparams */
435 static PGresult *c_psql_exec_query_params (c_psql_database_t *db,
436 udb_query_t *q, c_psql_user_data_t *data)
438 char *params[db->max_params_num];
442 if ((data == NULL) || (data->params_num == 0))
443 return (c_psql_exec_query_noparams (db, q));
445 assert (db->max_params_num >= data->params_num);
447 for (i = 0; i < data->params_num; ++i) {
448 switch (data->params[i]) {
449 case C_PSQL_PARAM_HOST:
450 params[i] = C_PSQL_IS_UNIX_DOMAIN_SOCKET (db->host)
451 ? "localhost" : db->host;
453 case C_PSQL_PARAM_DB:
454 params[i] = db->database;
456 case C_PSQL_PARAM_USER:
457 params[i] = db->user;
459 case C_PSQL_PARAM_INTERVAL:
460 ssnprintf (interval, sizeof (interval), "%.3f",
462 ? CDTIME_T_TO_DOUBLE (db->interval)
463 : plugin_get_interval ());
464 params[i] = interval;
466 case C_PSQL_PARAM_INSTANCE:
467 params[i] = db->instance;
474 return PQexecParams (db->conn, udb_query_get_statement (q),
475 data->params_num, NULL,
476 (const char *const *) params,
477 NULL, NULL, /* return text data */ 0);
478 } /* c_psql_exec_query_params */
480 /* db->db_lock must be locked when calling this function */
481 static int c_psql_exec_query (c_psql_database_t *db, udb_query_t *q,
482 udb_query_preparation_area_t *prep_area)
486 c_psql_user_data_t *data;
491 char **column_values;
498 /* The user data may hold parameter information, but may be NULL. */
499 data = udb_query_get_user_data (q);
501 /* Versions up to `3' don't know how to handle parameters. */
502 if (3 <= db->proto_version)
503 res = c_psql_exec_query_params (db, q, data);
504 else if ((NULL == data) || (0 == data->params_num))
505 res = c_psql_exec_query_noparams (db, q);
507 log_err ("Connection to database \"%s\" (%s) does not support "
508 "parameters (protocol version %d) - "
509 "cannot execute query \"%s\".",
510 db->database, db->instance, db->proto_version,
511 udb_query_get_name (q));
515 /* give c_psql_write() a chance to acquire the lock if called recursively
516 * through dispatch_values(); this will happen if, both, queries and
517 * writers are configured for a single connection */
518 pthread_mutex_unlock (&db->db_lock);
521 column_values = NULL;
523 if (PGRES_TUPLES_OK != PQresultStatus (res)) {
524 pthread_mutex_lock (&db->db_lock);
526 if ((CONNECTION_OK != PQstatus (db->conn))
527 && (0 == c_psql_check_connection (db))) {
529 return c_psql_exec_query (db, q, prep_area);
532 log_err ("Failed to execute SQL query: %s",
533 PQerrorMessage (db->conn));
534 log_info ("SQL query was: %s",
535 udb_query_get_statement (q));
540 #define BAIL_OUT(status) \
541 sfree (column_names); \
542 sfree (column_values); \
544 pthread_mutex_lock (&db->db_lock); \
547 rows_num = PQntuples (res);
552 column_num = PQnfields (res);
553 column_names = (char **) calloc (column_num, sizeof (char *));
554 if (NULL == column_names) {
555 log_err ("calloc failed.");
559 column_values = (char **) calloc (column_num, sizeof (char *));
560 if (NULL == column_values) {
561 log_err ("calloc failed.");
565 for (col = 0; col < column_num; ++col) {
566 /* Pointers returned by `PQfname' are freed by `PQclear' via
568 column_names[col] = PQfname (res, col);
569 if (NULL == column_names[col]) {
570 log_err ("Failed to resolve name of column %i.", col);
575 if (C_PSQL_IS_UNIX_DOMAIN_SOCKET (db->host)
576 || (0 == strcmp (db->host, "127.0.0.1"))
577 || (0 == strcmp (db->host, "localhost")))
582 status = udb_query_prepare_result (q, prep_area, host, "postgresql",
583 db->instance, column_names, (size_t) column_num, db->interval);
585 log_err ("udb_query_prepare_result failed with status %i.",
590 for (row = 0; row < rows_num; ++row) {
591 for (col = 0; col < column_num; ++col) {
592 /* Pointers returned by `PQgetvalue' are freed by `PQclear' via
594 column_values[col] = PQgetvalue (res, row, col);
595 if (NULL == column_values[col]) {
596 log_err ("Failed to get value at (row = %i, col = %i).",
602 /* check for an error */
603 if (col < column_num)
606 status = udb_query_handle_result (q, prep_area, column_values);
608 log_err ("udb_query_handle_result failed with status %i.",
611 } /* for (row = 0; row < rows_num; ++row) */
613 udb_query_finish_result (q, prep_area);
617 } /* c_psql_exec_query */
619 static int c_psql_read (user_data_t *ud)
621 c_psql_database_t *db;
626 if ((ud == NULL) || (ud->data == NULL)) {
627 log_err ("c_psql_read: Invalid user data.");
633 assert (NULL != db->database);
634 assert (NULL != db->instance);
635 assert (NULL != db->queries);
637 pthread_mutex_lock (&db->db_lock);
639 if (0 != c_psql_check_connection (db)) {
640 pthread_mutex_unlock (&db->db_lock);
644 for (i = 0; i < db->queries_num; ++i)
646 udb_query_preparation_area_t *prep_area;
649 prep_area = db->q_prep_areas[i];
652 if ((0 != db->server_version)
653 && (udb_query_check_version (q, db->server_version) <= 0))
656 if (0 == c_psql_exec_query (db, q, prep_area))
660 pthread_mutex_unlock (&db->db_lock);
667 static char *values_name_to_sqlarray (const data_set_t *ds,
668 char *string, size_t string_len)
676 str_len = string_len;
678 for (i = 0; i < ds->ds_num; ++i) {
679 int status = ssnprintf (str_ptr, str_len, ",'%s'", ds->ds[i].name);
683 else if ((size_t)status >= str_len) {
689 str_len -= (size_t)status;
694 log_err ("c_psql_write: Failed to stringify value names");
698 /* overwrite the first comma */
704 } /* values_name_to_sqlarray */
706 static char *values_type_to_sqlarray (const data_set_t *ds,
707 char *string, size_t string_len, _Bool store_rates)
715 str_len = string_len;
717 for (i = 0; i < ds->ds_num; ++i) {
721 status = ssnprintf(str_ptr, str_len, ",'gauge'");
723 status = ssnprintf(str_ptr, str_len, ",'%s'",
724 DS_TYPE_TO_STRING (ds->ds[i].type));
730 else if ((size_t)status >= str_len) {
736 str_len -= (size_t)status;
741 log_err ("c_psql_write: Failed to stringify value types");
745 /* overwrite the first comma */
751 } /* values_type_to_sqlarray */
753 static char *values_to_sqlarray (const data_set_t *ds, const value_list_t *vl,
754 char *string, size_t string_len, _Bool store_rates)
759 gauge_t *rates = NULL;
764 str_len = string_len;
766 for (i = 0; i < vl->values_len; ++i) {
769 if ((ds->ds[i].type != DS_TYPE_GAUGE)
770 && (ds->ds[i].type != DS_TYPE_COUNTER)
771 && (ds->ds[i].type != DS_TYPE_DERIVE)
772 && (ds->ds[i].type != DS_TYPE_ABSOLUTE)) {
773 log_err ("c_psql_write: Unknown data source type: %i",
779 if (ds->ds[i].type == DS_TYPE_GAUGE)
780 status = ssnprintf (str_ptr, str_len,
781 ",%f", vl->values[i].gauge);
782 else if (store_rates) {
784 rates = uc_get_rate (ds, vl);
787 log_err ("c_psql_write: Failed to determine rate");
791 status = ssnprintf (str_ptr, str_len,
794 else if (ds->ds[i].type == DS_TYPE_COUNTER)
795 status = ssnprintf (str_ptr, str_len,
796 ",%llu", vl->values[i].counter);
797 else if (ds->ds[i].type == DS_TYPE_DERIVE)
798 status = ssnprintf (str_ptr, str_len,
799 ",%"PRIi64, vl->values[i].derive);
800 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
801 status = ssnprintf (str_ptr, str_len,
802 ",%"PRIu64, vl->values[i].absolute);
808 else if ((size_t)status >= str_len) {
814 str_len -= (size_t)status;
821 log_err ("c_psql_write: Failed to stringify value list");
825 /* overwrite the first comma */
831 } /* values_to_sqlarray */
833 static int c_psql_write (const data_set_t *ds, const value_list_t *vl,
836 c_psql_database_t *db;
839 char values_name_str[1024];
840 char values_type_str[1024];
841 char values_str[1024];
843 const char *params[9];
848 if ((ud == NULL) || (ud->data == NULL)) {
849 log_err ("c_psql_write: Invalid user data.");
854 assert (db->database != NULL);
855 assert (db->writers != NULL);
857 if (cdtime_to_iso8601 (time_str, sizeof (time_str), vl->time) == 0) {
858 log_err ("c_psql_write: Failed to convert time to ISO 8601 format");
862 if (values_name_to_sqlarray (ds,
863 values_name_str, sizeof (values_name_str)) == NULL)
866 #define VALUE_OR_NULL(v) ((((v) == NULL) || (*(v) == '\0')) ? NULL : (v))
868 params[0] = time_str;
869 params[1] = vl->host;
870 params[2] = vl->plugin;
871 params[3] = VALUE_OR_NULL(vl->plugin_instance);
872 params[4] = vl->type;
873 params[5] = VALUE_OR_NULL(vl->type_instance);
874 params[6] = values_name_str;
878 if( db->expire_delay > 0 && vl->time < (cdtime() - vl->interval - db->expire_delay) ) {
879 log_info ("c_psql_write: Skipped expired value @ %s - %s/%s-%s/%s-%s/%s",
880 params[0], params[1], params[2], params[3], params[4], params[5], params[6] );
884 pthread_mutex_lock (&db->db_lock);
886 if (0 != c_psql_check_connection (db)) {
887 pthread_mutex_unlock (&db->db_lock);
891 if ((db->commit_interval > 0)
892 && (db->next_commit == 0))
895 for (i = 0; i < db->writers_num; ++i) {
896 c_psql_writer_t *writer;
899 writer = db->writers[i];
901 if (values_type_to_sqlarray (ds,
902 values_type_str, sizeof (values_type_str),
903 writer->store_rates) == NULL) {
904 pthread_mutex_unlock (&db->db_lock);
908 if (values_to_sqlarray (ds, vl,
909 values_str, sizeof (values_str),
910 writer->store_rates) == NULL) {
911 pthread_mutex_unlock (&db->db_lock);
915 params[7] = values_type_str;
916 params[8] = values_str;
918 res = PQexecParams (db->conn, writer->statement,
919 STATIC_ARRAY_SIZE (params), NULL,
920 (const char *const *)params,
921 NULL, NULL, /* return text data */ 0);
923 if ((PGRES_COMMAND_OK != PQresultStatus (res))
924 && (PGRES_TUPLES_OK != PQresultStatus (res))) {
927 if ((CONNECTION_OK != PQstatus (db->conn))
928 && (0 == c_psql_check_connection (db))) {
930 res = PQexecParams (db->conn, writer->statement,
931 STATIC_ARRAY_SIZE (params), NULL,
932 (const char *const *)params,
933 NULL, NULL, /* return text data */ 0);
935 if ((PGRES_COMMAND_OK == PQresultStatus (res))
936 || (PGRES_TUPLES_OK == PQresultStatus (res))) {
943 log_err ("Failed to execute SQL query: %s",
944 PQerrorMessage (db->conn));
945 log_info ("SQL query was: '%s', "
946 "params: %s, %s, %s, %s, %s, %s, %s, %s",
948 params[0], params[1], params[2], params[3],
949 params[4], params[5], params[6], params[7]);
951 /* this will abort any current transaction -> restart */
952 if (db->next_commit > 0)
955 pthread_mutex_unlock (&db->db_lock);
963 if ((db->next_commit > 0)
964 && (cdtime () > db->next_commit))
967 pthread_mutex_unlock (&db->db_lock);
974 /* We cannot flush single identifiers as all we do is to commit the currently
975 * running transaction, thus making sure that all written data is actually
976 * visible to everybody. */
977 static int c_psql_flush (cdtime_t timeout,
978 __attribute__((unused)) const char *ident,
981 c_psql_database_t **dbs = databases;
982 size_t dbs_num = databases_num;
985 if ((ud != NULL) && (ud->data != NULL)) {
986 dbs = (void *)&ud->data;
990 for (i = 0; i < dbs_num; ++i) {
991 c_psql_database_t *db = dbs[i];
993 /* don't commit if the timeout is larger than the regular commit
994 * interval as in that case all requested data has already been
996 if ((db->next_commit > 0) && (db->commit_interval > timeout))
1000 } /* c_psql_flush */
1002 static int c_psql_shutdown (void)
1006 _Bool had_flush = 0;
1008 plugin_unregister_read_group ("postgresql");
1010 for (i = 0; i < databases_num; ++i) {
1011 c_psql_database_t *db = databases[i];
1013 if (db->writers_num > 0) {
1014 char cb_name[DATA_MAX_NAME_LEN];
1015 ssnprintf (cb_name, sizeof (cb_name), "postgresql-%s",
1019 plugin_unregister_flush ("postgresql");
1023 plugin_unregister_flush (cb_name);
1024 plugin_unregister_write (cb_name);
1030 udb_query_free (queries, queries_num);
1043 } /* c_psql_shutdown */
1045 static int config_query_param_add (udb_query_t *q, oconfig_item_t *ci)
1047 c_psql_user_data_t *data;
1048 const char *param_str;
1050 c_psql_param_t *tmp;
1052 data = udb_query_get_user_data (q);
1054 data = (c_psql_user_data_t *) smalloc (sizeof (*data));
1056 log_err ("Out of memory.");
1059 memset (data, 0, sizeof (*data));
1060 data->params = NULL;
1063 tmp = (c_psql_param_t *) realloc (data->params,
1064 (data->params_num + 1) * sizeof (c_psql_param_t));
1066 log_err ("Out of memory.");
1071 param_str = ci->values[0].value.string;
1072 if (0 == strcasecmp (param_str, "hostname"))
1073 data->params[data->params_num] = C_PSQL_PARAM_HOST;
1074 else if (0 == strcasecmp (param_str, "database"))
1075 data->params[data->params_num] = C_PSQL_PARAM_DB;
1076 else if (0 == strcasecmp (param_str, "username"))
1077 data->params[data->params_num] = C_PSQL_PARAM_USER;
1078 else if (0 == strcasecmp (param_str, "interval"))
1079 data->params[data->params_num] = C_PSQL_PARAM_INTERVAL;
1080 else if (0 == strcasecmp (param_str, "instance"))
1081 data->params[data->params_num] = C_PSQL_PARAM_INSTANCE;
1083 log_err ("Invalid parameter \"%s\".", param_str);
1088 udb_query_set_user_data (q, data);
1091 } /* config_query_param_add */
1093 static int config_query_callback (udb_query_t *q, oconfig_item_t *ci)
1095 if (0 == strcasecmp ("Param", ci->key))
1096 return config_query_param_add (q, ci);
1098 log_err ("Option not allowed within a Query block: `%s'", ci->key);
1101 } /* config_query_callback */
1103 static int config_add_writer (oconfig_item_t *ci,
1104 c_psql_writer_t *src_writers, size_t src_writers_num,
1105 c_psql_writer_t ***dst_writers, size_t *dst_writers_num)
1111 if ((ci == NULL) || (dst_writers == NULL) || (dst_writers_num == NULL))
1114 if ((ci->values_num != 1)
1115 || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
1116 log_err ("`Writer' expects a single string argument.");
1120 name = ci->values[0].value.string;
1122 for (i = 0; i < src_writers_num; ++i) {
1123 c_psql_writer_t **tmp;
1125 if (strcasecmp (name, src_writers[i].name) != 0)
1128 tmp = (c_psql_writer_t **)realloc (*dst_writers,
1129 sizeof (**dst_writers) * (*dst_writers_num + 1));
1131 log_err ("Out of memory.");
1135 tmp[*dst_writers_num] = src_writers + i;
1138 ++(*dst_writers_num);
1142 if (i >= src_writers_num) {
1143 log_err ("No such writer: `%s'", name);
1148 } /* config_add_writer */
1150 static int c_psql_config_writer (oconfig_item_t *ci)
1152 c_psql_writer_t *writer;
1153 c_psql_writer_t *tmp;
1158 if ((ci->values_num != 1)
1159 || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
1160 log_err ("<Writer> expects a single string argument.");
1164 tmp = (c_psql_writer_t *)realloc (writers,
1165 sizeof (*writers) * (writers_num + 1));
1167 log_err ("Out of memory.");
1172 writer = writers + writers_num;
1175 writer->name = sstrdup (ci->values[0].value.string);
1176 writer->statement = NULL;
1177 writer->store_rates = 1;
1179 for (i = 0; i < ci->children_num; ++i) {
1180 oconfig_item_t *c = ci->children + i;
1182 if (strcasecmp ("Statement", c->key) == 0)
1183 status = cf_util_get_string (c, &writer->statement);
1184 else if (strcasecmp ("StoreRates", c->key) == 0)
1185 status = cf_util_get_boolean (c, &writer->store_rates);
1187 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1191 sfree (writer->statement);
1192 sfree (writer->name);
1198 } /* c_psql_config_writer */
1200 static int c_psql_config_database (oconfig_item_t *ci)
1202 c_psql_database_t *db;
1204 char cb_name[DATA_MAX_NAME_LEN];
1205 struct timespec cb_interval = { 0, 0 };
1208 static _Bool have_flush = 0;
1212 if ((1 != ci->values_num)
1213 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1214 log_err ("<Database> expects a single string argument.");
1218 memset (&ud, 0, sizeof (ud));
1220 db = c_psql_database_new (ci->values[0].value.string);
1224 for (i = 0; i < ci->children_num; ++i) {
1225 oconfig_item_t *c = ci->children + i;
1227 if (0 == strcasecmp (c->key, "Host"))
1228 cf_util_get_string (c, &db->host);
1229 else if (0 == strcasecmp (c->key, "Port"))
1230 cf_util_get_service (c, &db->port);
1231 else if (0 == strcasecmp (c->key, "User"))
1232 cf_util_get_string (c, &db->user);
1233 else if (0 == strcasecmp (c->key, "Password"))
1234 cf_util_get_string (c, &db->password);
1235 else if (0 == strcasecmp (c->key, "Instance"))
1236 cf_util_get_string (c, &db->instance);
1237 else if (0 == strcasecmp (c->key, "SSLMode"))
1238 cf_util_get_string (c, &db->sslmode);
1239 else if (0 == strcasecmp (c->key, "KRBSrvName"))
1240 cf_util_get_string (c, &db->krbsrvname);
1241 else if (0 == strcasecmp (c->key, "Service"))
1242 cf_util_get_string (c, &db->service);
1243 else if (0 == strcasecmp (c->key, "Query"))
1244 udb_query_pick_from_list (c, queries, queries_num,
1245 &db->queries, &db->queries_num);
1246 else if (0 == strcasecmp (c->key, "Writer"))
1247 config_add_writer (c, writers, writers_num,
1248 &db->writers, &db->writers_num);
1249 else if (0 == strcasecmp (c->key, "Interval"))
1250 cf_util_get_cdtime (c, &db->interval);
1251 else if (strcasecmp ("CommitInterval", c->key) == 0)
1252 cf_util_get_cdtime (c, &db->commit_interval);
1253 else if (strcasecmp ("ExpireDelay", c->key) == 0)
1254 cf_util_get_cdtime (c, &db->expire_delay);
1256 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1259 /* If no `Query' options were given, add the default queries.. */
1260 if ((db->queries_num == 0) && (db->writers_num == 0)){
1261 for (i = 0; i < def_queries_num; i++)
1262 udb_query_pick_from_list_by_name (def_queries[i],
1263 queries, queries_num,
1264 &db->queries, &db->queries_num);
1267 if (db->queries_num > 0) {
1268 db->q_prep_areas = (udb_query_preparation_area_t **) calloc (
1269 db->queries_num, sizeof (*db->q_prep_areas));
1271 if (db->q_prep_areas == NULL) {
1272 log_err ("Out of memory.");
1273 c_psql_database_delete (db);
1278 for (i = 0; (size_t)i < db->queries_num; ++i) {
1279 c_psql_user_data_t *data;
1280 data = udb_query_get_user_data (db->queries[i]);
1281 if ((data != NULL) && (data->params_num > db->max_params_num))
1282 db->max_params_num = data->params_num;
1285 = udb_query_allocate_preparation_area (db->queries[i]);
1287 if (db->q_prep_areas[i] == NULL) {
1288 log_err ("Out of memory.");
1289 c_psql_database_delete (db);
1295 ud.free_func = c_psql_database_delete;
1297 ssnprintf (cb_name, sizeof (cb_name), "postgresql-%s", db->instance);
1299 if (db->queries_num > 0) {
1300 CDTIME_T_TO_TIMESPEC (db->interval, &cb_interval);
1303 plugin_register_complex_read ("postgresql", cb_name, c_psql_read,
1304 /* interval = */ (db->interval > 0) ? &cb_interval : NULL,
1307 if (db->writers_num > 0) {
1309 plugin_register_write (cb_name, c_psql_write, &ud);
1313 plugin_register_flush ("postgresql",
1314 c_psql_flush, /* user data = */ NULL);
1318 /* flush this connection only */
1320 plugin_register_flush (cb_name, c_psql_flush, &ud);
1322 else if (db->commit_interval > 0) {
1323 log_warn ("Database '%s': You do not have any writers assigned to "
1324 "this database connection. Setting 'CommitInterval' does "
1325 "not have any effect.", db->database);
1328 } /* c_psql_config_database */
1330 static int c_psql_config (oconfig_item_t *ci)
1332 static int have_def_config = 0;
1336 if (0 == have_def_config) {
1339 have_def_config = 1;
1341 c = oconfig_parse_file (C_PSQL_DEFAULT_CONF);
1343 log_err ("Failed to read default config ("C_PSQL_DEFAULT_CONF").");
1347 if (NULL == queries)
1348 log_err ("Default config ("C_PSQL_DEFAULT_CONF") did not define "
1349 "any queries - please check your installation.");
1352 for (i = 0; i < ci->children_num; ++i) {
1353 oconfig_item_t *c = ci->children + i;
1355 if (0 == strcasecmp (c->key, "Query"))
1356 udb_query_create (&queries, &queries_num, c,
1357 /* callback = */ config_query_callback);
1358 else if (0 == strcasecmp (c->key, "Writer"))
1359 c_psql_config_writer (c);
1360 else if (0 == strcasecmp (c->key, "Database"))
1361 c_psql_config_database (c);
1363 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1366 } /* c_psql_config */
1368 void module_register (void)
1370 plugin_register_complex_config ("postgresql", c_psql_config);
1371 plugin_register_shutdown ("postgresql", c_psql_shutdown);
1372 } /* module_register */
1374 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */