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,
106 /* Parameter configuration. Stored as `user data' in the query objects. */
108 c_psql_param_t *params;
110 } c_psql_user_data_t;
120 c_complain_t conn_complaint;
127 /* user configuration */
128 udb_query_preparation_area_t **q_prep_areas;
129 udb_query_t **queries;
132 c_psql_writer_t **writers;
135 /* make sure we don't access the database object in parallel */
136 pthread_mutex_t db_lock;
140 /* writer "caching" settings */
141 cdtime_t commit_interval;
142 cdtime_t next_commit;
157 static char *def_queries[] = {
166 static int def_queries_num = STATIC_ARRAY_SIZE (def_queries);
168 static udb_query_t **queries = NULL;
169 static size_t queries_num = 0;
171 static c_psql_writer_t *writers = NULL;
172 static size_t writers_num = 0;
174 static int c_psql_begin (c_psql_database_t *db)
176 PGresult *r = PQexec (db->conn, "BEGIN");
181 if (PGRES_COMMAND_OK == PQresultStatus (r)) {
182 db->next_commit = cdtime() + db->commit_interval;
186 log_warn ("Failed to initiate ('BEGIN') transaction: %s",
187 PQerrorMessage (db->conn));
193 static int c_psql_commit (c_psql_database_t *db)
195 PGresult *r = PQexec (db->conn, "COMMIT");
200 if (PGRES_COMMAND_OK == PQresultStatus (r)) {
201 db->next_commit = cdtime () + db->commit_interval;
202 log_debug ("Successfully committed transaction.");
206 log_warn ("Failed to commit transaction: %s",
207 PQerrorMessage (db->conn));
211 } /* c_psql_commit */
213 static c_psql_database_t *c_psql_database_new (const char *name)
215 c_psql_database_t *db;
217 db = (c_psql_database_t *)malloc (sizeof (*db));
219 log_err ("Out of memory.");
225 C_COMPLAIN_INIT (&db->conn_complaint);
227 db->proto_version = 0;
228 db->server_version = 0;
230 db->max_params_num = 0;
232 db->q_prep_areas = NULL;
239 pthread_mutex_init (&db->db_lock, /* attrs = */ NULL);
243 db->commit_interval = 0;
246 db->database = sstrdup (name);
254 db->krbsrvname = NULL;
258 } /* c_psql_database_new */
260 static void c_psql_database_delete (void *data)
264 c_psql_database_t *db = data;
266 /* wait for the lock to be released by the last writer */
267 pthread_mutex_lock (&db->db_lock);
269 if (db->next_commit > 0)
275 if (db->q_prep_areas)
276 for (i = 0; i < db->queries_num; ++i)
277 udb_query_delete_preparation_area (db->q_prep_areas[i]);
278 free (db->q_prep_areas);
286 pthread_mutex_unlock (&db->db_lock);
288 pthread_mutex_destroy (&db->db_lock);
290 sfree (db->database);
294 sfree (db->password);
298 sfree (db->krbsrvname);
302 } /* c_psql_database_delete */
304 static int c_psql_connect (c_psql_database_t *db)
307 char *buf = conninfo;
308 int buf_len = sizeof (conninfo);
314 status = ssnprintf (buf, buf_len, "dbname = '%s'", db->database);
320 C_PSQL_PAR_APPEND (buf, buf_len, "host", db->host);
321 C_PSQL_PAR_APPEND (buf, buf_len, "port", db->port);
322 C_PSQL_PAR_APPEND (buf, buf_len, "user", db->user);
323 C_PSQL_PAR_APPEND (buf, buf_len, "password", db->password);
324 C_PSQL_PAR_APPEND (buf, buf_len, "sslmode", db->sslmode);
325 C_PSQL_PAR_APPEND (buf, buf_len, "krbsrvname", db->krbsrvname);
326 C_PSQL_PAR_APPEND (buf, buf_len, "service", db->service);
328 db->conn = PQconnectdb (conninfo);
329 db->proto_version = PQprotocolVersion (db->conn);
331 } /* c_psql_connect */
333 static int c_psql_check_connection (c_psql_database_t *db)
340 /* trigger c_release() */
341 if (0 == db->conn_complaint.interval)
342 db->conn_complaint.interval = 1;
348 PQclear (PQexec (db->conn, "SELECT 42;"));
350 if (CONNECTION_OK != PQstatus (db->conn)) {
353 /* trigger c_release() */
354 if (0 == db->conn_complaint.interval)
355 db->conn_complaint.interval = 1;
357 if (CONNECTION_OK != PQstatus (db->conn)) {
358 c_complain (LOG_ERR, &db->conn_complaint,
359 "Failed to connect to database %s: %s",
360 db->database, PQerrorMessage (db->conn));
364 db->proto_version = PQprotocolVersion (db->conn);
367 db->server_version = PQserverVersion (db->conn);
369 if (c_would_release (&db->conn_complaint)) {
373 server_host = PQhost (db->conn);
374 server_version = PQserverVersion (db->conn);
376 c_do_release (LOG_INFO, &db->conn_complaint,
377 "Successfully %sconnected to database %s (user %s) "
378 "at server %s%s%s (server version: %d.%d.%d, "
379 "protocol version: %d, pid: %d)", init ? "" : "re",
380 PQdb (db->conn), PQuser (db->conn),
381 C_PSQL_SOCKET3 (server_host, PQport (db->conn)),
382 C_PSQL_SERVER_VERSION3 (server_version),
383 db->proto_version, PQbackendPID (db->conn));
385 if (3 > db->proto_version)
386 log_warn ("Protocol version %d does not support parameters.",
390 } /* c_psql_check_connection */
392 static PGresult *c_psql_exec_query_noparams (c_psql_database_t *db,
395 return PQexec (db->conn, udb_query_get_statement (q));
396 } /* c_psql_exec_query_noparams */
398 static PGresult *c_psql_exec_query_params (c_psql_database_t *db,
399 udb_query_t *q, c_psql_user_data_t *data)
401 char *params[db->max_params_num];
405 if ((data == NULL) || (data->params_num == 0))
406 return (c_psql_exec_query_noparams (db, q));
408 assert (db->max_params_num >= data->params_num);
410 for (i = 0; i < data->params_num; ++i) {
411 switch (data->params[i]) {
412 case C_PSQL_PARAM_HOST:
413 params[i] = C_PSQL_IS_UNIX_DOMAIN_SOCKET (db->host)
414 ? "localhost" : db->host;
416 case C_PSQL_PARAM_DB:
417 params[i] = db->database;
419 case C_PSQL_PARAM_USER:
420 params[i] = db->user;
422 case C_PSQL_PARAM_INTERVAL:
423 ssnprintf (interval, sizeof (interval), "%.3f",
425 ? CDTIME_T_TO_DOUBLE (db->interval) : interval_g);
426 params[i] = interval;
433 return PQexecParams (db->conn, udb_query_get_statement (q),
434 data->params_num, NULL,
435 (const char *const *) params,
436 NULL, NULL, /* return text data */ 0);
437 } /* c_psql_exec_query_params */
439 /* db->db_lock must be locked when calling this function */
440 static int c_psql_exec_query (c_psql_database_t *db, udb_query_t *q,
441 udb_query_preparation_area_t *prep_area)
445 c_psql_user_data_t *data;
450 char **column_values;
457 /* The user data may hold parameter information, but may be NULL. */
458 data = udb_query_get_user_data (q);
460 /* Versions up to `3' don't know how to handle parameters. */
461 if (3 <= db->proto_version)
462 res = c_psql_exec_query_params (db, q, data);
463 else if ((NULL == data) || (0 == data->params_num))
464 res = c_psql_exec_query_noparams (db, q);
466 log_err ("Connection to database \"%s\" does not support parameters "
467 "(protocol version %d) - cannot execute query \"%s\".",
468 db->database, db->proto_version,
469 udb_query_get_name (q));
473 /* give c_psql_write() a chance to acquire the lock if called recursively
474 * through dispatch_values(); this will happen if, both, queries and
475 * writers are configured for a single connection */
476 pthread_mutex_unlock (&db->db_lock);
479 column_values = NULL;
481 if (PGRES_TUPLES_OK != PQresultStatus (res)) {
482 pthread_mutex_lock (&db->db_lock);
484 log_err ("Failed to execute SQL query: %s",
485 PQerrorMessage (db->conn));
486 log_info ("SQL query was: %s",
487 udb_query_get_statement (q));
492 #define BAIL_OUT(status) \
493 sfree (column_names); \
494 sfree (column_values); \
496 pthread_mutex_lock (&db->db_lock); \
499 rows_num = PQntuples (res);
504 column_num = PQnfields (res);
505 column_names = (char **) calloc (column_num, sizeof (char *));
506 if (NULL == column_names) {
507 log_err ("calloc failed.");
511 column_values = (char **) calloc (column_num, sizeof (char *));
512 if (NULL == column_values) {
513 log_err ("calloc failed.");
517 for (col = 0; col < column_num; ++col) {
518 /* Pointers returned by `PQfname' are freed by `PQclear' via
520 column_names[col] = PQfname (res, col);
521 if (NULL == column_names[col]) {
522 log_err ("Failed to resolve name of column %i.", col);
527 if (C_PSQL_IS_UNIX_DOMAIN_SOCKET (db->host)
528 || (0 == strcmp (db->host, "localhost")))
533 status = udb_query_prepare_result (q, prep_area, host, "postgresql",
534 db->database, column_names, (size_t) column_num, db->interval);
536 log_err ("udb_query_prepare_result failed with status %i.",
541 for (row = 0; row < rows_num; ++row) {
542 for (col = 0; col < column_num; ++col) {
543 /* Pointers returned by `PQgetvalue' are freed by `PQclear' via
545 column_values[col] = PQgetvalue (res, row, col);
546 if (NULL == column_values[col]) {
547 log_err ("Failed to get value at (row = %i, col = %i).",
553 /* check for an error */
554 if (col < column_num)
557 status = udb_query_handle_result (q, prep_area, column_values);
559 log_err ("udb_query_handle_result failed with status %i.",
562 } /* for (row = 0; row < rows_num; ++row) */
564 udb_query_finish_result (q, prep_area);
568 } /* c_psql_exec_query */
570 static int c_psql_read (user_data_t *ud)
572 c_psql_database_t *db;
577 if ((ud == NULL) || (ud->data == NULL)) {
578 log_err ("c_psql_read: Invalid user data.");
584 assert (NULL != db->database);
585 assert (NULL != db->queries);
587 pthread_mutex_lock (&db->db_lock);
589 if (0 != c_psql_check_connection (db)) {
590 pthread_mutex_unlock (&db->db_lock);
594 for (i = 0; i < db->queries_num; ++i)
596 udb_query_preparation_area_t *prep_area;
599 prep_area = db->q_prep_areas[i];
602 if ((0 != db->server_version)
603 && (udb_query_check_version (q, db->server_version) <= 0))
606 if (0 == c_psql_exec_query (db, q, prep_area))
610 pthread_mutex_unlock (&db->db_lock);
617 static char *values_name_to_sqlarray (const data_set_t *ds,
618 char *string, size_t string_len)
626 str_len = string_len;
628 for (i = 0; i < ds->ds_num; ++i) {
629 int status = ssnprintf (str_ptr, str_len, ",'%s'", ds->ds[i].name);
633 else if ((size_t)status >= str_len) {
639 str_len -= (size_t)status;
644 log_err ("c_psql_write: Failed to stringify value names");
648 /* overwrite the first comma */
654 } /* values_name_to_sqlarray */
656 static char *values_type_to_sqlarray (const data_set_t *ds,
657 char *string, size_t string_len, _Bool store_rates)
665 str_len = string_len;
667 for (i = 0; i < ds->ds_num; ++i) {
671 status = ssnprintf(str_ptr, str_len, ",'gauge'");
673 status = ssnprintf(str_ptr, str_len, ",'%s'",
674 DS_TYPE_TO_STRING (ds->ds[i].type));
680 else if ((size_t)status >= str_len) {
686 str_len -= (size_t)status;
691 log_err ("c_psql_write: Failed to stringify value types");
695 /* overwrite the first comma */
701 } /* values_type_to_sqlarray */
703 static char *values_to_sqlarray (const data_set_t *ds, const value_list_t *vl,
704 char *string, size_t string_len, _Bool store_rates)
709 gauge_t *rates = NULL;
714 str_len = string_len;
716 for (i = 0; i < vl->values_len; ++i) {
719 if ((ds->ds[i].type != DS_TYPE_GAUGE)
720 && (ds->ds[i].type != DS_TYPE_COUNTER)
721 && (ds->ds[i].type != DS_TYPE_DERIVE)
722 && (ds->ds[i].type != DS_TYPE_ABSOLUTE)) {
723 log_err ("c_psql_write: Unknown data source type: %i",
729 if (ds->ds[i].type == DS_TYPE_GAUGE)
730 status = ssnprintf (str_ptr, str_len,
731 ",%f", vl->values[i].gauge);
732 else if (store_rates) {
734 rates = uc_get_rate (ds, vl);
737 log_err ("c_psql_write: Failed to determine rate");
741 status = ssnprintf (str_ptr, str_len,
744 else if (ds->ds[i].type == DS_TYPE_COUNTER)
745 status = ssnprintf (str_ptr, str_len,
746 ",%llu", vl->values[i].counter);
747 else if (ds->ds[i].type == DS_TYPE_DERIVE)
748 status = ssnprintf (str_ptr, str_len,
749 ",%"PRIi64, vl->values[i].derive);
750 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
751 status = ssnprintf (str_ptr, str_len,
752 ",%"PRIu64, vl->values[i].absolute);
758 else if ((size_t)status >= str_len) {
764 str_len -= (size_t)status;
771 log_err ("c_psql_write: Failed to stringify value list");
775 /* overwrite the first comma */
781 } /* values_to_sqlarray */
783 static int c_psql_write (const data_set_t *ds, const value_list_t *vl,
786 c_psql_database_t *db;
789 char values_name_str[1024];
790 char values_type_str[1024];
791 char values_str[1024];
793 const char *params[9];
798 if ((ud == NULL) || (ud->data == NULL)) {
799 log_err ("c_psql_write: Invalid user data.");
804 assert (db->database != NULL);
805 assert (db->writers != NULL);
807 if (cdtime_to_iso8601 (time_str, sizeof (time_str), vl->time) == 0) {
808 log_err ("c_psql_write: Failed to convert time to ISO 8601 format");
812 if (values_name_to_sqlarray (ds,
813 values_name_str, sizeof (values_name_str)) == NULL)
816 #define VALUE_OR_NULL(v) ((((v) == NULL) || (*(v) == '\0')) ? NULL : (v))
818 params[0] = time_str;
819 params[1] = vl->host;
820 params[2] = vl->plugin;
821 params[3] = VALUE_OR_NULL(vl->plugin_instance);
822 params[4] = vl->type;
823 params[5] = VALUE_OR_NULL(vl->type_instance);
824 params[6] = values_name_str;
828 pthread_mutex_lock (&db->db_lock);
830 if (0 != c_psql_check_connection (db)) {
831 pthread_mutex_unlock (&db->db_lock);
835 if ((db->commit_interval > 0)
836 && (db->next_commit == 0))
839 for (i = 0; i < db->writers_num; ++i) {
840 c_psql_writer_t *writer;
843 writer = db->writers[i];
845 if (values_type_to_sqlarray (ds,
846 values_type_str, sizeof (values_type_str),
847 writer->store_rates) == NULL) {
848 pthread_mutex_unlock (&db->db_lock);
852 if (values_to_sqlarray (ds, vl,
853 values_str, sizeof (values_str),
854 writer->store_rates) == NULL) {
855 pthread_mutex_unlock (&db->db_lock);
859 params[7] = values_type_str;
860 params[8] = values_str;
862 res = PQexecParams (db->conn, writer->statement,
863 STATIC_ARRAY_SIZE (params), NULL,
864 (const char *const *)params,
865 NULL, NULL, /* return text data */ 0);
867 if ((PGRES_COMMAND_OK != PQresultStatus (res))
868 && (PGRES_TUPLES_OK != PQresultStatus (res))) {
869 if ((CONNECTION_OK != PQstatus (db->conn))
870 && (0 == c_psql_check_connection (db))) {
874 res = PQexecParams (db->conn, writer->statement,
875 STATIC_ARRAY_SIZE (params), NULL,
876 (const char *const *)params,
877 NULL, NULL, /* return text data */ 0);
879 if ((PGRES_COMMAND_OK == PQresultStatus (res))
880 || (PGRES_TUPLES_OK == PQresultStatus (res))) {
886 log_err ("Failed to execute SQL query: %s",
887 PQerrorMessage (db->conn));
888 log_info ("SQL query was: '%s', "
889 "params: %s, %s, %s, %s, %s, %s, %s, %s",
891 params[0], params[1], params[2], params[3],
892 params[4], params[5], params[6], params[7]);
894 /* this will abort any current transaction -> restart */
895 if (db->next_commit > 0)
896 if (c_psql_commit (db) == 0)
899 pthread_mutex_unlock (&db->db_lock);
905 if ((db->next_commit > 0)
906 && (cdtime () > db->next_commit))
907 if (c_psql_commit (db) == 0)
910 pthread_mutex_unlock (&db->db_lock);
917 static int c_psql_shutdown (void)
919 plugin_unregister_read_group ("postgresql");
921 udb_query_free (queries, queries_num);
930 } /* c_psql_shutdown */
932 static int config_query_param_add (udb_query_t *q, oconfig_item_t *ci)
934 c_psql_user_data_t *data;
935 const char *param_str;
939 data = udb_query_get_user_data (q);
941 data = (c_psql_user_data_t *) smalloc (sizeof (*data));
943 log_err ("Out of memory.");
946 memset (data, 0, sizeof (*data));
950 tmp = (c_psql_param_t *) realloc (data->params,
951 (data->params_num + 1) * sizeof (c_psql_param_t));
953 log_err ("Out of memory.");
958 param_str = ci->values[0].value.string;
959 if (0 == strcasecmp (param_str, "hostname"))
960 data->params[data->params_num] = C_PSQL_PARAM_HOST;
961 else if (0 == strcasecmp (param_str, "database"))
962 data->params[data->params_num] = C_PSQL_PARAM_DB;
963 else if (0 == strcasecmp (param_str, "username"))
964 data->params[data->params_num] = C_PSQL_PARAM_USER;
965 else if (0 == strcasecmp (param_str, "interval"))
966 data->params[data->params_num] = C_PSQL_PARAM_INTERVAL;
968 log_err ("Invalid parameter \"%s\".", param_str);
973 udb_query_set_user_data (q, data);
976 } /* config_query_param_add */
978 static int config_query_callback (udb_query_t *q, oconfig_item_t *ci)
980 if (0 == strcasecmp ("Param", ci->key))
981 return config_query_param_add (q, ci);
983 log_err ("Option not allowed within a Query block: `%s'", ci->key);
986 } /* config_query_callback */
988 static int config_add_writer (oconfig_item_t *ci,
989 c_psql_writer_t *src_writers, size_t src_writers_num,
990 c_psql_writer_t ***dst_writers, size_t *dst_writers_num)
996 if ((ci == NULL) || (dst_writers == NULL) || (dst_writers_num == NULL))
999 if ((ci->values_num != 1)
1000 || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
1001 log_err ("`Writer' expects a single string argument.");
1005 name = ci->values[0].value.string;
1007 for (i = 0; i < src_writers_num; ++i) {
1008 c_psql_writer_t **tmp;
1010 if (strcasecmp (name, src_writers[i].name) != 0)
1013 tmp = (c_psql_writer_t **)realloc (*dst_writers,
1014 sizeof (**dst_writers) * (*dst_writers_num + 1));
1016 log_err ("Out of memory.");
1020 tmp[*dst_writers_num] = src_writers + i;
1023 ++(*dst_writers_num);
1027 if (i >= src_writers_num) {
1028 log_err ("No such writer: `%s'", name);
1033 } /* config_add_writer */
1035 static int c_psql_config_writer (oconfig_item_t *ci)
1037 c_psql_writer_t *writer;
1038 c_psql_writer_t *tmp;
1043 if ((ci->values_num != 1)
1044 || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
1045 log_err ("<Writer> expects a single string argument.");
1049 tmp = (c_psql_writer_t *)realloc (writers,
1050 sizeof (*writers) * (writers_num + 1));
1052 log_err ("Out of memory.");
1057 writer = writers + writers_num;
1060 writer->name = sstrdup (ci->values[0].value.string);
1061 writer->statement = NULL;
1062 writer->store_rates = 1;
1064 for (i = 0; i < ci->children_num; ++i) {
1065 oconfig_item_t *c = ci->children + i;
1067 if (strcasecmp ("Statement", c->key) == 0)
1068 status = cf_util_get_string (c, &writer->statement);
1069 else if (strcasecmp ("StoreRates", c->key) == 0)
1070 status = cf_util_get_boolean (c, &writer->store_rates);
1072 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1076 sfree (writer->statement);
1077 sfree (writer->name);
1083 } /* c_psql_config_writer */
1085 static int c_psql_config_database (oconfig_item_t *ci)
1087 c_psql_database_t *db;
1089 char cb_name[DATA_MAX_NAME_LEN];
1090 struct timespec cb_interval = { 0, 0 };
1095 if ((1 != ci->values_num)
1096 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1097 log_err ("<Database> expects a single string argument.");
1101 memset (&ud, 0, sizeof (ud));
1103 db = c_psql_database_new (ci->values[0].value.string);
1107 for (i = 0; i < ci->children_num; ++i) {
1108 oconfig_item_t *c = ci->children + i;
1110 if (0 == strcasecmp (c->key, "Host"))
1111 cf_util_get_string (c, &db->host);
1112 else if (0 == strcasecmp (c->key, "Port"))
1113 cf_util_get_service (c, &db->port);
1114 else if (0 == strcasecmp (c->key, "User"))
1115 cf_util_get_string (c, &db->user);
1116 else if (0 == strcasecmp (c->key, "Password"))
1117 cf_util_get_string (c, &db->password);
1118 else if (0 == strcasecmp (c->key, "SSLMode"))
1119 cf_util_get_string (c, &db->sslmode);
1120 else if (0 == strcasecmp (c->key, "KRBSrvName"))
1121 cf_util_get_string (c, &db->krbsrvname);
1122 else if (0 == strcasecmp (c->key, "Service"))
1123 cf_util_get_string (c, &db->service);
1124 else if (0 == strcasecmp (c->key, "Query"))
1125 udb_query_pick_from_list (c, queries, queries_num,
1126 &db->queries, &db->queries_num);
1127 else if (0 == strcasecmp (c->key, "Writer"))
1128 config_add_writer (c, writers, writers_num,
1129 &db->writers, &db->writers_num);
1130 else if (0 == strcasecmp (c->key, "Interval"))
1131 cf_util_get_cdtime (c, &db->interval);
1132 else if (strcasecmp ("CommitInterval", c->key) == 0)
1133 cf_util_get_cdtime (c, &db->commit_interval);
1135 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1138 /* If no `Query' options were given, add the default queries.. */
1139 if ((db->queries_num == 0) && (db->writers_num == 0)){
1140 for (i = 0; i < def_queries_num; i++)
1141 udb_query_pick_from_list_by_name (def_queries[i],
1142 queries, queries_num,
1143 &db->queries, &db->queries_num);
1146 if (db->queries_num > 0) {
1147 db->q_prep_areas = (udb_query_preparation_area_t **) calloc (
1148 db->queries_num, sizeof (*db->q_prep_areas));
1150 if (db->q_prep_areas == NULL) {
1151 log_err ("Out of memory.");
1152 c_psql_database_delete (db);
1157 for (i = 0; (size_t)i < db->queries_num; ++i) {
1158 c_psql_user_data_t *data;
1159 data = udb_query_get_user_data (db->queries[i]);
1160 if ((data != NULL) && (data->params_num > db->max_params_num))
1161 db->max_params_num = data->params_num;
1164 = udb_query_allocate_preparation_area (db->queries[i]);
1166 if (db->q_prep_areas[i] == NULL) {
1167 log_err ("Out of memory.");
1168 c_psql_database_delete (db);
1174 ud.free_func = c_psql_database_delete;
1176 ssnprintf (cb_name, sizeof (cb_name), "postgresql-%s", db->database);
1178 if (db->queries_num > 0) {
1179 CDTIME_T_TO_TIMESPEC (db->interval, &cb_interval);
1181 plugin_register_complex_read ("postgresql", cb_name, c_psql_read,
1182 /* interval = */ (db->interval > 0) ? &cb_interval : NULL,
1185 if (db->writers_num > 0) {
1186 plugin_register_write (cb_name, c_psql_write, &ud);
1188 else if (db->commit_interval > 0) {
1189 log_warn ("Database '%s': You do not have any writers assigned to "
1190 "this database connection. Setting 'CommitInterval' does "
1191 "not have any effect.", db->database);
1194 } /* c_psql_config_database */
1196 static int c_psql_config (oconfig_item_t *ci)
1198 static int have_def_config = 0;
1202 if (0 == have_def_config) {
1205 have_def_config = 1;
1207 c = oconfig_parse_file (C_PSQL_DEFAULT_CONF);
1209 log_err ("Failed to read default config ("C_PSQL_DEFAULT_CONF").");
1213 if (NULL == queries)
1214 log_err ("Default config ("C_PSQL_DEFAULT_CONF") did not define "
1215 "any queries - please check your installation.");
1218 for (i = 0; i < ci->children_num; ++i) {
1219 oconfig_item_t *c = ci->children + i;
1221 if (0 == strcasecmp (c->key, "Query"))
1222 udb_query_create (&queries, &queries_num, c,
1223 /* callback = */ config_query_callback);
1224 else if (0 == strcasecmp (c->key, "Writer"))
1225 c_psql_config_writer (c);
1226 else if (0 == strcasecmp (c->key, "Database"))
1227 c_psql_config_database (c);
1229 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1232 } /* c_psql_config */
1234 void module_register (void)
1236 plugin_register_complex_config ("postgresql", c_psql_config);
1237 plugin_register_shutdown ("postgresql", c_psql_shutdown);
1238 } /* module_register */
1240 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */