/**
* collectd - src/postgresql.c
- * Copyright (C) 2008, 2009 Sebastian Harl
- * Copyright (C) 2009 Florian Forster
+ * Copyright (C) 2008-2012 Sebastian Harl
+ * Copyright (C) 2009 Florian Forster
*
- * 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; only version 2 of the License is applicable.
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
*
- * 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.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
*
* Authors:
* Sebastian Harl <sh at tokkee.org>
- * Florian Forster <octo at verplant.org>
+ * Florian Forster <octo at collectd.org>
**/
/*
#include "configfile.h"
#include "plugin.h"
+#include "utils_cache.h"
#include "utils_db_query.h"
#include "utils_complain.h"
+#if HAVE_PTHREAD_H
+# include <pthread.h>
+#endif
+
#include <pg_config_manual.h>
#include <libpq-fe.h>
#define log_err(...) ERROR ("postgresql: " __VA_ARGS__)
#define log_warn(...) WARNING ("postgresql: " __VA_ARGS__)
#define log_info(...) INFO ("postgresql: " __VA_ARGS__)
+#define log_debug(...) DEBUG ("postgresql: " __VA_ARGS__)
#ifndef C_PSQL_DEFAULT_CONF
# define C_PSQL_DEFAULT_CONF PKGDATADIR "/postgresql_default.conf"
C_PSQL_PARAM_DB,
C_PSQL_PARAM_USER,
C_PSQL_PARAM_INTERVAL,
+ C_PSQL_PARAM_INSTANCE,
} c_psql_param_t;
/* Parameter configuration. Stored as `user data' in the query objects. */
} c_psql_user_data_t;
typedef struct {
+ char *name;
+ char *statement;
+ _Bool store_rates;
+} c_psql_writer_t;
+
+typedef struct {
PGconn *conn;
c_complain_t conn_complaint;
int max_params_num;
/* user configuration */
+ udb_query_preparation_area_t **q_prep_areas;
udb_query_t **queries;
size_t queries_num;
+ c_psql_writer_t **writers;
+ size_t writers_num;
+
+ /* make sure we don't access the database object in parallel */
+ pthread_mutex_t db_lock;
+
+ cdtime_t interval;
+
+ /* writer "caching" settings */
+ cdtime_t commit_interval;
+ cdtime_t next_commit;
+ cdtime_t expire_delay;
+
char *host;
char *port;
char *database;
char *user;
char *password;
+ char *instance;
+
char *sslmode;
char *krbsrvname;
char *service;
+
+ int ref_cnt;
} c_psql_database_t;
static char *def_queries[] = {
};
static int def_queries_num = STATIC_ARRAY_SIZE (def_queries);
-static udb_query_t **queries = NULL;
-static size_t queries_num = 0;
+static c_psql_database_t **databases = NULL;
+static size_t databases_num = 0;
+
+static udb_query_t **queries = NULL;
+static size_t queries_num = 0;
+
+static c_psql_writer_t *writers = NULL;
+static size_t writers_num = 0;
+
+static int c_psql_begin (c_psql_database_t *db)
+{
+ PGresult *r = PQexec (db->conn, "BEGIN");
+
+ int status = 1;
+
+ if (r != NULL) {
+ if (PGRES_COMMAND_OK == PQresultStatus (r)) {
+ db->next_commit = cdtime() + db->commit_interval;
+ status = 0;
+ }
+ else
+ log_warn ("Failed to initiate ('BEGIN') transaction: %s",
+ PQerrorMessage (db->conn));
+ PQclear (r);
+ }
+ return status;
+} /* c_psql_begin */
+
+static int c_psql_commit (c_psql_database_t *db)
+{
+ PGresult *r = PQexec (db->conn, "COMMIT");
-static c_psql_database_t *databases = NULL;
-static int databases_num = 0;
+ int status = 1;
+
+ if (r != NULL) {
+ if (PGRES_COMMAND_OK == PQresultStatus (r)) {
+ db->next_commit = 0;
+ log_debug ("Successfully committed transaction.");
+ status = 0;
+ }
+ else
+ log_warn ("Failed to commit transaction: %s",
+ PQerrorMessage (db->conn));
+ PQclear (r);
+ }
+ return status;
+} /* c_psql_commit */
static c_psql_database_t *c_psql_database_new (const char *name)
{
- c_psql_database_t *db;
+ c_psql_database_t **tmp;
+ c_psql_database_t *db;
- ++databases_num;
- if (NULL == (databases = (c_psql_database_t *)realloc (databases,
- databases_num * sizeof (*databases)))) {
+ db = (c_psql_database_t *)malloc (sizeof(*db));
+ if (NULL == db) {
+ log_err ("Out of memory.");
+ return NULL;
+ }
+
+ tmp = (c_psql_database_t **)realloc (databases,
+ (databases_num + 1) * sizeof (*databases));
+ if (NULL == tmp) {
log_err ("Out of memory.");
- exit (5);
+ sfree (db);
+ return NULL;
}
- db = databases + (databases_num - 1);
+ databases = tmp;
+ databases[databases_num] = db;
+ ++databases_num;
db->conn = NULL;
db->max_params_num = 0;
+ db->q_prep_areas = NULL;
db->queries = NULL;
db->queries_num = 0;
+ db->writers = NULL;
+ db->writers_num = 0;
+
+ pthread_mutex_init (&db->db_lock, /* attrs = */ NULL);
+
+ db->interval = 0;
+
+ db->commit_interval = 0;
+ db->next_commit = 0;
+ db->expire_delay = 0;
+
db->database = sstrdup (name);
db->host = NULL;
db->port = NULL;
db->user = NULL;
db->password = NULL;
+ db->instance = sstrdup (name);
+
db->sslmode = NULL;
db->krbsrvname = NULL;
db->service = NULL;
+
+ db->ref_cnt = 0;
return db;
} /* c_psql_database_new */
-static void c_psql_database_delete (c_psql_database_t *db)
+static void c_psql_database_delete (void *data)
{
+ size_t i;
+
+ c_psql_database_t *db = data;
+
+ --db->ref_cnt;
+ /* readers and writers may access this database */
+ if (db->ref_cnt > 0)
+ return;
+
+ /* wait for the lock to be released by the last writer */
+ pthread_mutex_lock (&db->db_lock);
+
+ if (db->next_commit > 0)
+ c_psql_commit (db);
+
PQfinish (db->conn);
db->conn = NULL;
+ if (db->q_prep_areas)
+ for (i = 0; i < db->queries_num; ++i)
+ udb_query_delete_preparation_area (db->q_prep_areas[i]);
+ free (db->q_prep_areas);
+
sfree (db->queries);
db->queries_num = 0;
+ sfree (db->writers);
+ db->writers_num = 0;
+
+ pthread_mutex_unlock (&db->db_lock);
+
+ pthread_mutex_destroy (&db->db_lock);
+
sfree (db->database);
sfree (db->host);
sfree (db->port);
sfree (db->user);
sfree (db->password);
+ sfree (db->instance);
+
sfree (db->sslmode);
sfree (db->krbsrvname);
sfree (db->service);
+
+ /* don't care about freeing or reordering the 'databases' array
+ * this is done in 'shutdown'; also, don't free the database instance
+ * object just to make sure that in case anybody accesses it before
+ * shutdown won't segfault */
return;
} /* c_psql_database_delete */
+static int c_psql_connect (c_psql_database_t *db)
+{
+ char conninfo[4096];
+ char *buf = conninfo;
+ int buf_len = sizeof (conninfo);
+ int status;
+
+ if ((! db) || (! db->database))
+ return -1;
+
+ status = ssnprintf (buf, buf_len, "dbname = '%s'", db->database);
+ if (0 < status) {
+ buf += status;
+ buf_len -= status;
+ }
+
+ C_PSQL_PAR_APPEND (buf, buf_len, "host", db->host);
+ C_PSQL_PAR_APPEND (buf, buf_len, "port", db->port);
+ C_PSQL_PAR_APPEND (buf, buf_len, "user", db->user);
+ C_PSQL_PAR_APPEND (buf, buf_len, "password", db->password);
+ C_PSQL_PAR_APPEND (buf, buf_len, "sslmode", db->sslmode);
+ C_PSQL_PAR_APPEND (buf, buf_len, "krbsrvname", db->krbsrvname);
+ C_PSQL_PAR_APPEND (buf, buf_len, "service", db->service);
+
+ db->conn = PQconnectdb (conninfo);
+ db->proto_version = PQprotocolVersion (db->conn);
+ return 0;
+} /* c_psql_connect */
+
static int c_psql_check_connection (c_psql_database_t *db)
{
- /* "ping" */
- PQclear (PQexec (db->conn, "SELECT 42;"));
+ _Bool init = 0;
+
+ if (! db->conn) {
+ init = 1;
+
+ /* trigger c_release() */
+ if (0 == db->conn_complaint.interval)
+ db->conn_complaint.interval = 1;
+
+ c_psql_connect (db);
+ }
if (CONNECTION_OK != PQstatus (db->conn)) {
PQreset (db->conn);
if (CONNECTION_OK != PQstatus (db->conn)) {
c_complain (LOG_ERR, &db->conn_complaint,
- "Failed to connect to database %s: %s",
- db->database, PQerrorMessage (db->conn));
+ "Failed to connect to database %s (%s): %s",
+ db->database, db->instance,
+ PQerrorMessage (db->conn));
return -1;
}
db->proto_version = PQprotocolVersion (db->conn);
- if (3 > db->proto_version)
- log_warn ("Protocol version %d does not support parameters.",
- db->proto_version);
}
db->server_version = PQserverVersion (db->conn);
- c_release (LOG_INFO, &db->conn_complaint,
- "Successfully reconnected to database %s", PQdb (db->conn));
+ if (c_would_release (&db->conn_complaint)) {
+ char *server_host;
+ int server_version;
+
+ server_host = PQhost (db->conn);
+ server_version = PQserverVersion (db->conn);
+
+ c_do_release (LOG_INFO, &db->conn_complaint,
+ "Successfully %sconnected to database %s (user %s) "
+ "at server %s%s%s (server version: %d.%d.%d, "
+ "protocol version: %d, pid: %d)", init ? "" : "re",
+ PQdb (db->conn), PQuser (db->conn),
+ C_PSQL_SOCKET3 (server_host, PQport (db->conn)),
+ C_PSQL_SERVER_VERSION3 (server_version),
+ db->proto_version, PQbackendPID (db->conn));
+
+ if (3 > db->proto_version)
+ log_warn ("Protocol version %d does not support parameters.",
+ db->proto_version);
+ }
return 0;
} /* c_psql_check_connection */
params[i] = db->user;
break;
case C_PSQL_PARAM_INTERVAL:
- ssnprintf (interval, sizeof (interval), "%i", interval_g);
+ ssnprintf (interval, sizeof (interval), "%.3f",
+ (db->interval > 0)
+ ? CDTIME_T_TO_DOUBLE (db->interval)
+ : plugin_get_interval ());
params[i] = interval;
break;
+ case C_PSQL_PARAM_INSTANCE:
+ params[i] = db->instance;
+ break;
default:
assert (0);
}
NULL, NULL, /* return text data */ 0);
} /* c_psql_exec_query_params */
-static int c_psql_exec_query (c_psql_database_t *db, udb_query_t *q)
+/* db->db_lock must be locked when calling this function */
+static int c_psql_exec_query (c_psql_database_t *db, udb_query_t *q,
+ udb_query_preparation_area_t *prep_area)
{
PGresult *res;
else if ((NULL == data) || (0 == data->params_num))
res = c_psql_exec_query_noparams (db, q);
else {
- log_err ("Connection to database \"%s\" does not support parameters "
- "(protocol version %d) - cannot execute query \"%s\".",
- db->database, db->proto_version,
+ log_err ("Connection to database \"%s\" (%s) does not support "
+ "parameters (protocol version %d) - "
+ "cannot execute query \"%s\".",
+ db->database, db->instance, db->proto_version,
udb_query_get_name (q));
return -1;
}
+ /* give c_psql_write() a chance to acquire the lock if called recursively
+ * through dispatch_values(); this will happen if, both, queries and
+ * writers are configured for a single connection */
+ pthread_mutex_unlock (&db->db_lock);
+
column_names = NULL;
column_values = NULL;
-#define BAIL_OUT(status) \
- sfree (column_names); \
- sfree (column_values); \
- PQclear (res); \
- return status
-
if (PGRES_TUPLES_OK != PQresultStatus (res)) {
+ pthread_mutex_lock (&db->db_lock);
+
+ if ((CONNECTION_OK != PQstatus (db->conn))
+ && (0 == c_psql_check_connection (db))) {
+ PQclear (res);
+ return c_psql_exec_query (db, q, prep_area);
+ }
+
log_err ("Failed to execute SQL query: %s",
PQerrorMessage (db->conn));
log_info ("SQL query was: %s",
udb_query_get_statement (q));
- BAIL_OUT (-1);
+ PQclear (res);
+ return -1;
}
+#define BAIL_OUT(status) \
+ sfree (column_names); \
+ sfree (column_values); \
+ PQclear (res); \
+ pthread_mutex_lock (&db->db_lock); \
+ return status
+
rows_num = PQntuples (res);
if (1 > rows_num) {
BAIL_OUT (0);
* `BAIL_OUT'. */
column_names[col] = PQfname (res, col);
if (NULL == column_names[col]) {
- log_err ("Failed to resolv name of column %i.", col);
+ log_err ("Failed to resolve name of column %i.", col);
BAIL_OUT (-1);
}
}
if (C_PSQL_IS_UNIX_DOMAIN_SOCKET (db->host)
+ || (0 == strcmp (db->host, "127.0.0.1"))
|| (0 == strcmp (db->host, "localhost")))
host = hostname_g;
else
host = db->host;
- status = udb_query_prepare_result (q, host, "postgresql",
- db->database, column_names, (size_t) column_num);
+ status = udb_query_prepare_result (q, prep_area, host, "postgresql",
+ db->instance, column_names, (size_t) column_num, db->interval);
if (0 != status) {
log_err ("udb_query_prepare_result failed with status %i.",
status);
if (col < column_num)
continue;
- status = udb_query_handle_result (q, column_values);
+ status = udb_query_handle_result (q, prep_area, column_values);
if (status != 0) {
log_err ("udb_query_handle_result failed with status %i.",
status);
}
} /* for (row = 0; row < rows_num; ++row) */
+ udb_query_finish_result (q, prep_area);
+
BAIL_OUT (0);
#undef BAIL_OUT
} /* c_psql_exec_query */
-static int c_psql_read (void)
+static int c_psql_read (user_data_t *ud)
{
+ c_psql_database_t *db;
+
int success = 0;
int i;
- for (i = 0; i < databases_num; ++i) {
- c_psql_database_t *db = databases + i;
+ if ((ud == NULL) || (ud->data == NULL)) {
+ log_err ("c_psql_read: Invalid user data.");
+ return -1;
+ }
- int j;
+ db = ud->data;
- assert (NULL != db->database);
+ assert (NULL != db->database);
+ assert (NULL != db->instance);
+ assert (NULL != db->queries);
- if (0 != c_psql_check_connection (db))
- continue;
+ pthread_mutex_lock (&db->db_lock);
+
+ if (0 != c_psql_check_connection (db)) {
+ pthread_mutex_unlock (&db->db_lock);
+ return -1;
+ }
- for (j = 0; j < db->queries_num; ++j)
- {
- udb_query_t *q;
+ for (i = 0; i < db->queries_num; ++i)
+ {
+ udb_query_preparation_area_t *prep_area;
+ udb_query_t *q;
- q = db->queries[j];
+ prep_area = db->q_prep_areas[i];
+ q = db->queries[i];
- if ((0 != db->server_version)
+ if ((0 != db->server_version)
&& (udb_query_check_version (q, db->server_version) <= 0))
- continue;
-
- c_psql_exec_query (db, q);
- }
+ continue;
- ++success;
+ if (0 == c_psql_exec_query (db, q, prep_area))
+ success = 1;
}
+ pthread_mutex_unlock (&db->db_lock);
+
if (! success)
return -1;
return 0;
} /* c_psql_read */
-static int c_psql_shutdown (void)
+static char *values_name_to_sqlarray (const data_set_t *ds,
+ char *string, size_t string_len)
{
+ char *str_ptr;
+ size_t str_len;
+
int i;
- if ((NULL == databases) || (0 == databases_num))
- return 0;
+ str_ptr = string;
+ str_len = string_len;
- plugin_unregister_read ("postgresql");
- plugin_unregister_shutdown ("postgresql");
+ for (i = 0; i < ds->ds_num; ++i) {
+ int status = ssnprintf (str_ptr, str_len, ",'%s'", ds->ds[i].name);
- for (i = 0; i < databases_num; ++i)
- c_psql_database_delete (databases + i);
+ if (status < 1)
+ return NULL;
+ else if ((size_t)status >= str_len) {
+ str_len = 0;
+ break;
+ }
+ else {
+ str_ptr += status;
+ str_len -= (size_t)status;
+ }
+ }
- sfree (databases);
- databases_num = 0;
+ if (str_len <= 2) {
+ log_err ("c_psql_write: Failed to stringify value names");
+ return NULL;
+ }
- udb_query_free (queries, queries_num);
- queries = NULL;
- queries_num = 0;
+ /* overwrite the first comma */
+ string[0] = '{';
+ str_ptr[0] = '}';
+ str_ptr[1] = '\0';
- return 0;
-} /* c_psql_shutdown */
+ return string;
+} /* values_name_to_sqlarray */
+
+static char *values_type_to_sqlarray (const data_set_t *ds,
+ char *string, size_t string_len, _Bool store_rates)
+{
+ char *str_ptr;
+ size_t str_len;
+
+ int i;
+
+ str_ptr = string;
+ str_len = string_len;
+
+ for (i = 0; i < ds->ds_num; ++i) {
+ int status;
+
+ if (store_rates)
+ status = ssnprintf(str_ptr, str_len, ",'gauge'");
+ else
+ status = ssnprintf(str_ptr, str_len, ",'%s'",
+ DS_TYPE_TO_STRING (ds->ds[i].type));
+
+ if (status < 1) {
+ str_len = 0;
+ break;
+ }
+ else if ((size_t)status >= str_len) {
+ str_len = 0;
+ break;
+ }
+ else {
+ str_ptr += status;
+ str_len -= (size_t)status;
+ }
+ }
+
+ if (str_len <= 2) {
+ log_err ("c_psql_write: Failed to stringify value types");
+ return NULL;
+ }
+
+ /* overwrite the first comma */
+ string[0] = '{';
+ str_ptr[0] = '}';
+ str_ptr[1] = '\0';
+
+ return string;
+} /* values_type_to_sqlarray */
+
+static char *values_to_sqlarray (const data_set_t *ds, const value_list_t *vl,
+ char *string, size_t string_len, _Bool store_rates)
+{
+ char *str_ptr;
+ size_t str_len;
+
+ gauge_t *rates = NULL;
+
+ int i;
+
+ str_ptr = string;
+ str_len = string_len;
+
+ for (i = 0; i < vl->values_len; ++i) {
+ int status = 0;
+
+ if ((ds->ds[i].type != DS_TYPE_GAUGE)
+ && (ds->ds[i].type != DS_TYPE_COUNTER)
+ && (ds->ds[i].type != DS_TYPE_DERIVE)
+ && (ds->ds[i].type != DS_TYPE_ABSOLUTE)) {
+ log_err ("c_psql_write: Unknown data source type: %i",
+ ds->ds[i].type);
+ sfree (rates);
+ return NULL;
+ }
+
+ if (ds->ds[i].type == DS_TYPE_GAUGE)
+ status = ssnprintf (str_ptr, str_len,
+ ",%f", vl->values[i].gauge);
+ else if (store_rates) {
+ if (rates == NULL)
+ rates = uc_get_rate (ds, vl);
+
+ if (rates == NULL) {
+ log_err ("c_psql_write: Failed to determine rate");
+ return NULL;
+ }
-static int c_psql_init (void)
+ status = ssnprintf (str_ptr, str_len,
+ ",%lf", rates[i]);
+ }
+ else if (ds->ds[i].type == DS_TYPE_COUNTER)
+ status = ssnprintf (str_ptr, str_len,
+ ",%llu", vl->values[i].counter);
+ else if (ds->ds[i].type == DS_TYPE_DERIVE)
+ status = ssnprintf (str_ptr, str_len,
+ ",%"PRIi64, vl->values[i].derive);
+ else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
+ status = ssnprintf (str_ptr, str_len,
+ ",%"PRIu64, vl->values[i].absolute);
+
+ if (status < 1) {
+ str_len = 0;
+ break;
+ }
+ else if ((size_t)status >= str_len) {
+ str_len = 0;
+ break;
+ }
+ else {
+ str_ptr += status;
+ str_len -= (size_t)status;
+ }
+ }
+
+ sfree (rates);
+
+ if (str_len <= 2) {
+ log_err ("c_psql_write: Failed to stringify value list");
+ return NULL;
+ }
+
+ /* overwrite the first comma */
+ string[0] = '{';
+ str_ptr[0] = '}';
+ str_ptr[1] = '\0';
+
+ return string;
+} /* values_to_sqlarray */
+
+static int c_psql_write (const data_set_t *ds, const value_list_t *vl,
+ user_data_t *ud)
{
+ c_psql_database_t *db;
+
+ char time_str[32];
+ char values_name_str[1024];
+ char values_type_str[1024];
+ char values_str[1024];
+
+ const char *params[9];
+
+ int success = 0;
int i;
- if ((NULL == databases) || (0 == databases_num))
+ if ((ud == NULL) || (ud->data == NULL)) {
+ log_err ("c_psql_write: Invalid user data.");
+ return -1;
+ }
+
+ db = ud->data;
+ assert (db->database != NULL);
+ assert (db->writers != NULL);
+
+ if (cdtime_to_iso8601 (time_str, sizeof (time_str), vl->time) == 0) {
+ log_err ("c_psql_write: Failed to convert time to ISO 8601 format");
+ return -1;
+ }
+
+ if (values_name_to_sqlarray (ds,
+ values_name_str, sizeof (values_name_str)) == NULL)
+ return -1;
+
+#define VALUE_OR_NULL(v) ((((v) == NULL) || (*(v) == '\0')) ? NULL : (v))
+
+ params[0] = time_str;
+ params[1] = vl->host;
+ params[2] = vl->plugin;
+ params[3] = VALUE_OR_NULL(vl->plugin_instance);
+ params[4] = vl->type;
+ params[5] = VALUE_OR_NULL(vl->type_instance);
+ params[6] = values_name_str;
+
+#undef VALUE_OR_NULL
+
+ if( db->expire_delay > 0 && vl->time < (cdtime() - vl->interval - db->expire_delay) ) {
+ log_info ("c_psql_write: Skipped expired value @ %s - %s/%s-%s/%s-%s/%s",
+ params[0], params[1], params[2], params[3], params[4], params[5], params[6] );
return 0;
+ }
- for (i = 0; i < databases_num; ++i) {
- c_psql_database_t *db = databases + i;
+ pthread_mutex_lock (&db->db_lock);
+
+ if (0 != c_psql_check_connection (db)) {
+ pthread_mutex_unlock (&db->db_lock);
+ return -1;
+ }
- char conninfo[4096];
- char *buf = conninfo;
- int buf_len = sizeof (conninfo);
- int status;
+ if ((db->commit_interval > 0)
+ && (db->next_commit == 0))
+ c_psql_begin (db);
- char *server_host;
- int server_version;
+ for (i = 0; i < db->writers_num; ++i) {
+ c_psql_writer_t *writer;
+ PGresult *res;
- /* this will happen during reinitialization */
- if (NULL != db->conn) {
- c_psql_check_connection (db);
- continue;
+ writer = db->writers[i];
+
+ if (values_type_to_sqlarray (ds,
+ values_type_str, sizeof (values_type_str),
+ writer->store_rates) == NULL) {
+ pthread_mutex_unlock (&db->db_lock);
+ return -1;
}
- status = ssnprintf (buf, buf_len, "dbname = '%s'", db->database);
- if (0 < status) {
- buf += status;
- buf_len -= status;
+ if (values_to_sqlarray (ds, vl,
+ values_str, sizeof (values_str),
+ writer->store_rates) == NULL) {
+ pthread_mutex_unlock (&db->db_lock);
+ return -1;
}
- C_PSQL_PAR_APPEND (buf, buf_len, "host", db->host);
- C_PSQL_PAR_APPEND (buf, buf_len, "port", db->port);
- C_PSQL_PAR_APPEND (buf, buf_len, "user", db->user);
- C_PSQL_PAR_APPEND (buf, buf_len, "password", db->password);
- C_PSQL_PAR_APPEND (buf, buf_len, "sslmode", db->sslmode);
- C_PSQL_PAR_APPEND (buf, buf_len, "krbsrvname", db->krbsrvname);
- C_PSQL_PAR_APPEND (buf, buf_len, "service", db->service);
+ params[7] = values_type_str;
+ params[8] = values_str;
+
+ res = PQexecParams (db->conn, writer->statement,
+ STATIC_ARRAY_SIZE (params), NULL,
+ (const char *const *)params,
+ NULL, NULL, /* return text data */ 0);
+
+ if ((PGRES_COMMAND_OK != PQresultStatus (res))
+ && (PGRES_TUPLES_OK != PQresultStatus (res))) {
+ PQclear (res);
+
+ if ((CONNECTION_OK != PQstatus (db->conn))
+ && (0 == c_psql_check_connection (db))) {
+ /* try again */
+ res = PQexecParams (db->conn, writer->statement,
+ STATIC_ARRAY_SIZE (params), NULL,
+ (const char *const *)params,
+ NULL, NULL, /* return text data */ 0);
+
+ if ((PGRES_COMMAND_OK == PQresultStatus (res))
+ || (PGRES_TUPLES_OK == PQresultStatus (res))) {
+ PQclear (res);
+ success = 1;
+ continue;
+ }
+ }
- db->conn = PQconnectdb (conninfo);
- if (0 != c_psql_check_connection (db))
- continue;
+ log_err ("Failed to execute SQL query: %s",
+ PQerrorMessage (db->conn));
+ log_info ("SQL query was: '%s', "
+ "params: %s, %s, %s, %s, %s, %s, %s, %s",
+ writer->statement,
+ params[0], params[1], params[2], params[3],
+ params[4], params[5], params[6], params[7]);
- db->proto_version = PQprotocolVersion (db->conn);
+ /* this will abort any current transaction -> restart */
+ if (db->next_commit > 0)
+ c_psql_commit (db);
- server_host = PQhost (db->conn);
- server_version = PQserverVersion (db->conn);
- log_info ("Sucessfully connected to database %s (user %s) "
- "at server %s%s%s (server version: %d.%d.%d, "
- "protocol version: %d, pid: %d)",
- PQdb (db->conn), PQuser (db->conn),
- C_PSQL_SOCKET3 (server_host, PQport (db->conn)),
- C_PSQL_SERVER_VERSION3 (server_version),
- db->proto_version, PQbackendPID (db->conn));
+ pthread_mutex_unlock (&db->db_lock);
+ return -1;
+ }
- if (3 > db->proto_version)
- log_warn ("Protocol version %d does not support parameters.",
- db->proto_version);
+ PQclear (res);
+ success = 1;
}
- plugin_register_read ("postgresql", c_psql_read);
- plugin_register_shutdown ("postgresql", c_psql_shutdown);
+ if ((db->next_commit > 0)
+ && (cdtime () > db->next_commit))
+ c_psql_commit (db);
+
+ pthread_mutex_unlock (&db->db_lock);
+
+ if (! success)
+ return -1;
+ return 0;
+} /* c_psql_write */
+
+/* We cannot flush single identifiers as all we do is to commit the currently
+ * running transaction, thus making sure that all written data is actually
+ * visible to everybody. */
+static int c_psql_flush (cdtime_t timeout,
+ __attribute__((unused)) const char *ident,
+ user_data_t *ud)
+{
+ c_psql_database_t **dbs = databases;
+ size_t dbs_num = databases_num;
+ size_t i;
+
+ if ((ud != NULL) && (ud->data != NULL)) {
+ dbs = (void *)&ud->data;
+ dbs_num = 1;
+ }
+
+ for (i = 0; i < dbs_num; ++i) {
+ c_psql_database_t *db = dbs[i];
+
+ /* don't commit if the timeout is larger than the regular commit
+ * interval as in that case all requested data has already been
+ * committed */
+ if ((db->next_commit > 0) && (db->commit_interval > timeout))
+ c_psql_commit (db);
+ }
return 0;
-} /* c_psql_init */
+} /* c_psql_flush */
-static int config_set_s (char *name, char **var, const oconfig_item_t *ci)
+static int c_psql_shutdown (void)
{
- if ((0 != ci->children_num) || (1 != ci->values_num)
- || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
- log_err ("%s expects a single string argument.", name);
- return 1;
+ size_t i = 0;
+
+ _Bool had_flush = 0;
+
+ plugin_unregister_read_group ("postgresql");
+
+ for (i = 0; i < databases_num; ++i) {
+ c_psql_database_t *db = databases[i];
+
+ if (db->writers_num > 0) {
+ char cb_name[DATA_MAX_NAME_LEN];
+ ssnprintf (cb_name, sizeof (cb_name), "postgresql-%s",
+ db->database);
+
+ if (! had_flush) {
+ plugin_unregister_flush ("postgresql");
+ had_flush = 1;
+ }
+
+ plugin_unregister_flush (cb_name);
+ plugin_unregister_write (cb_name);
+ }
+
+ sfree (db);
}
- sfree (*var);
- *var = sstrdup (ci->values[0].value.string);
+ udb_query_free (queries, queries_num);
+ queries = NULL;
+ queries_num = 0;
+
+ sfree (writers);
+ writers = NULL;
+ writers_num = 0;
+
+ sfree (databases);
+ databases = NULL;
+ databases_num = 0;
+
return 0;
-} /* config_set_s */
+} /* c_psql_shutdown */
static int config_query_param_add (udb_query_t *q, oconfig_item_t *ci)
{
data->params[data->params_num] = C_PSQL_PARAM_USER;
else if (0 == strcasecmp (param_str, "interval"))
data->params[data->params_num] = C_PSQL_PARAM_INTERVAL;
+ else if (0 == strcasecmp (param_str, "instance"))
+ data->params[data->params_num] = C_PSQL_PARAM_INSTANCE;
else {
log_err ("Invalid parameter \"%s\".", param_str);
return 1;
return (-1);
} /* config_query_callback */
+static int config_add_writer (oconfig_item_t *ci,
+ c_psql_writer_t *src_writers, size_t src_writers_num,
+ c_psql_writer_t ***dst_writers, size_t *dst_writers_num)
+{
+ char *name;
+
+ size_t i;
+
+ if ((ci == NULL) || (dst_writers == NULL) || (dst_writers_num == NULL))
+ return -1;
+
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
+ log_err ("`Writer' expects a single string argument.");
+ return 1;
+ }
+
+ name = ci->values[0].value.string;
+
+ for (i = 0; i < src_writers_num; ++i) {
+ c_psql_writer_t **tmp;
+
+ if (strcasecmp (name, src_writers[i].name) != 0)
+ continue;
+
+ tmp = (c_psql_writer_t **)realloc (*dst_writers,
+ sizeof (**dst_writers) * (*dst_writers_num + 1));
+ if (tmp == NULL) {
+ log_err ("Out of memory.");
+ return -1;
+ }
+
+ tmp[*dst_writers_num] = src_writers + i;
+
+ *dst_writers = tmp;
+ ++(*dst_writers_num);
+ break;
+ }
+
+ if (i >= src_writers_num) {
+ log_err ("No such writer: `%s'", name);
+ return -1;
+ }
+
+ return 0;
+} /* config_add_writer */
+
+static int c_psql_config_writer (oconfig_item_t *ci)
+{
+ c_psql_writer_t *writer;
+ c_psql_writer_t *tmp;
+
+ int status = 0;
+ int i;
+
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
+ log_err ("<Writer> expects a single string argument.");
+ return 1;
+ }
+
+ tmp = (c_psql_writer_t *)realloc (writers,
+ sizeof (*writers) * (writers_num + 1));
+ if (tmp == NULL) {
+ log_err ("Out of memory.");
+ return -1;
+ }
+
+ writers = tmp;
+ writer = writers + writers_num;
+ ++writers_num;
+
+ writer->name = sstrdup (ci->values[0].value.string);
+ writer->statement = NULL;
+ writer->store_rates = 1;
+
+ for (i = 0; i < ci->children_num; ++i) {
+ oconfig_item_t *c = ci->children + i;
+
+ if (strcasecmp ("Statement", c->key) == 0)
+ status = cf_util_get_string (c, &writer->statement);
+ else if (strcasecmp ("StoreRates", c->key) == 0)
+ status = cf_util_get_boolean (c, &writer->store_rates);
+ else
+ log_warn ("Ignoring unknown config key \"%s\".", c->key);
+ }
+
+ if (status != 0) {
+ sfree (writer->statement);
+ sfree (writer->name);
+ sfree (writer);
+ return status;
+ }
+
+ return 0;
+} /* c_psql_config_writer */
+
static int c_psql_config_database (oconfig_item_t *ci)
{
c_psql_database_t *db;
+ char cb_name[DATA_MAX_NAME_LEN];
+ struct timespec cb_interval = { 0, 0 };
+ user_data_t ud;
+
+ static _Bool have_flush = 0;
+
int i;
if ((1 != ci->values_num)
return 1;
}
+ memset (&ud, 0, sizeof (ud));
+
db = c_psql_database_new (ci->values[0].value.string);
+ if (db == NULL)
+ return -1;
for (i = 0; i < ci->children_num; ++i) {
oconfig_item_t *c = ci->children + i;
if (0 == strcasecmp (c->key, "Host"))
- config_set_s ("Host", &db->host, c);
+ cf_util_get_string (c, &db->host);
else if (0 == strcasecmp (c->key, "Port"))
- config_set_s ("Port", &db->port, c);
+ cf_util_get_service (c, &db->port);
else if (0 == strcasecmp (c->key, "User"))
- config_set_s ("User", &db->user, c);
+ cf_util_get_string (c, &db->user);
else if (0 == strcasecmp (c->key, "Password"))
- config_set_s ("Password", &db->password, c);
+ cf_util_get_string (c, &db->password);
+ else if (0 == strcasecmp (c->key, "Instance"))
+ cf_util_get_string (c, &db->instance);
else if (0 == strcasecmp (c->key, "SSLMode"))
- config_set_s ("SSLMode", &db->sslmode, c);
+ cf_util_get_string (c, &db->sslmode);
else if (0 == strcasecmp (c->key, "KRBSrvName"))
- config_set_s ("KRBSrvName", &db->krbsrvname, c);
+ cf_util_get_string (c, &db->krbsrvname);
else if (0 == strcasecmp (c->key, "Service"))
- config_set_s ("Service", &db->service, c);
+ cf_util_get_string (c, &db->service);
else if (0 == strcasecmp (c->key, "Query"))
udb_query_pick_from_list (c, queries, queries_num,
&db->queries, &db->queries_num);
+ else if (0 == strcasecmp (c->key, "Writer"))
+ config_add_writer (c, writers, writers_num,
+ &db->writers, &db->writers_num);
+ else if (0 == strcasecmp (c->key, "Interval"))
+ cf_util_get_cdtime (c, &db->interval);
+ else if (strcasecmp ("CommitInterval", c->key) == 0)
+ cf_util_get_cdtime (c, &db->commit_interval);
+ else if (strcasecmp ("ExpireDelay", c->key) == 0)
+ cf_util_get_cdtime (c, &db->expire_delay);
else
log_warn ("Ignoring unknown config key \"%s\".", c->key);
}
/* If no `Query' options were given, add the default queries.. */
- if (db->queries_num == 0)
- {
+ if ((db->queries_num == 0) && (db->writers_num == 0)){
for (i = 0; i < def_queries_num; i++)
udb_query_pick_from_list_by_name (def_queries[i],
queries, queries_num,
&db->queries, &db->queries_num);
}
+ if (db->queries_num > 0) {
+ db->q_prep_areas = (udb_query_preparation_area_t **) calloc (
+ db->queries_num, sizeof (*db->q_prep_areas));
+
+ if (db->q_prep_areas == NULL) {
+ log_err ("Out of memory.");
+ c_psql_database_delete (db);
+ return -1;
+ }
+ }
+
for (i = 0; (size_t)i < db->queries_num; ++i) {
c_psql_user_data_t *data;
data = udb_query_get_user_data (db->queries[i]);
if ((data != NULL) && (data->params_num > db->max_params_num))
db->max_params_num = data->params_num;
+
+ db->q_prep_areas[i]
+ = udb_query_allocate_preparation_area (db->queries[i]);
+
+ if (db->q_prep_areas[i] == NULL) {
+ log_err ("Out of memory.");
+ c_psql_database_delete (db);
+ return -1;
+ }
+ }
+
+ ud.data = db;
+ ud.free_func = c_psql_database_delete;
+
+ ssnprintf (cb_name, sizeof (cb_name), "postgresql-%s", db->instance);
+
+ if (db->queries_num > 0) {
+ CDTIME_T_TO_TIMESPEC (db->interval, &cb_interval);
+
+ ++db->ref_cnt;
+ plugin_register_complex_read ("postgresql", cb_name, c_psql_read,
+ /* interval = */ (db->interval > 0) ? &cb_interval : NULL,
+ &ud);
+ }
+ if (db->writers_num > 0) {
+ ++db->ref_cnt;
+ plugin_register_write (cb_name, c_psql_write, &ud);
+
+ if (! have_flush) {
+ /* flush all */
+ plugin_register_flush ("postgresql",
+ c_psql_flush, /* user data = */ NULL);
+ have_flush = 1;
+ }
+
+ /* flush this connection only */
+ ++db->ref_cnt;
+ plugin_register_flush (cb_name, c_psql_flush, &ud);
+ }
+ else if (db->commit_interval > 0) {
+ log_warn ("Database '%s': You do not have any writers assigned to "
+ "this database connection. Setting 'CommitInterval' does "
+ "not have any effect.", db->database);
}
return 0;
} /* c_psql_config_database */
if (0 == strcasecmp (c->key, "Query"))
udb_query_create (&queries, &queries_num, c,
- /* callback = */ config_query_callback,
- /* legacy mode = */ 1);
+ /* callback = */ config_query_callback);
+ else if (0 == strcasecmp (c->key, "Writer"))
+ c_psql_config_writer (c);
else if (0 == strcasecmp (c->key, "Database"))
c_psql_config_database (c);
else
void module_register (void)
{
plugin_register_complex_config ("postgresql", c_psql_config);
- plugin_register_init ("postgresql", c_psql_init);
+ plugin_register_shutdown ("postgresql", c_psql_shutdown);
} /* module_register */
/* vim: set sw=4 ts=4 tw=78 noexpandtab : */
projects / collectd.git / blobdiff