1 /**
2 * collectd - src/mysql.c
3 * Copyright (C) 2006,2007 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
25 #include "configfile.h"
27 #ifdef HAVE_MYSQL_MYSQL_H
28 #include <mysql/mysql.h>
29 #endif
31 /* TODO: Understand `Select_*' and possibly do that stuff as well.. */
33 static const char *config_keys[] =
34 {
35 "Host",
36 "User",
37 "Password",
38 "Database",
39 NULL
40 };
41 static int config_keys_num = 4;
43 static char *host = "localhost";
44 static char *user;
45 static char *pass;
46 static char *db = NULL;
48 static MYSQL *getconnection (void)
49 {
50 static MYSQL *con;
51 static int state;
53 static int wait_for = 0;
54 static int wait_increase = 60;
56 if (state != 0)
57 {
58 int err;
59 if ((err = mysql_ping (con)) != 0)
60 {
61 WARNING ("mysql_ping failed: %s", mysql_error (con));
62 state = 0;
63 }
64 else
65 {
66 state = 1;
67 return (con);
68 }
69 }
71 if (wait_for > 0)
72 {
73 wait_for -= interval_g;
74 return (NULL);
75 }
77 wait_for = wait_increase;
78 wait_increase *= 2;
79 if (wait_increase > 86400)
80 wait_increase = 86400;
82 if ((con = mysql_init (con)) == NULL)
83 {
84 ERROR ("mysql_init failed: %s", mysql_error (con));
85 state = 0;
86 return (NULL);
87 }
89 if (mysql_real_connect (con, host, user, pass, db, 0, NULL, 0) == NULL)
90 {
91 ERROR ("mysql_real_connect failed: %s", mysql_error (con));
92 state = 0;
93 return (NULL);
94 }
95 else
96 {
97 state = 1;
98 wait_for = 0;
99 wait_increase = 60;
100 return (con);
101 }
102 } /* static MYSQL *getconnection (void) */
104 static int config (const char *key, const char *value)
105 {
106 if (strcasecmp (key, "host") == 0)
107 return ((host = strdup (value)) == NULL ? 1 : 0);
108 else if (strcasecmp (key, "user") == 0)
109 return ((user = strdup (value)) == NULL ? 1 : 0);
110 else if (strcasecmp (key, "password") == 0)
111 return ((pass = strdup (value)) == NULL ? 1 : 0);
112 else if (strcasecmp (key, "database") == 0)
113 return ((db = strdup (value)) == NULL ? 1 : 0);
114 else
115 return (-1);
116 }
118 static void counter_submit (const char *type, const char *type_instance,
119 counter_t value)
120 {
121 value_t values[1];
122 value_list_t vl = VALUE_LIST_INIT;
124 values[0].counter = value;
126 vl.values = values;
127 vl.values_len = 1;
128 vl.time = time (NULL);
129 strcpy (vl.host, hostname_g);
130 strcpy (vl.plugin, "mysql");
131 strncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
133 plugin_dispatch_values (type, &vl);
134 } /* void counter_submit */
136 static void qcache_submit (counter_t hits, counter_t inserts,
137 counter_t not_cached, counter_t lowmem_prunes,
138 gauge_t queries_in_cache)
139 {
140 value_t values[5];
141 value_list_t vl = VALUE_LIST_INIT;
143 values[0].counter = hits;
144 values[1].counter = inserts;
145 values[2].counter = not_cached;
146 values[3].counter = lowmem_prunes;
147 values[4].gauge = queries_in_cache;
149 vl.values = values;
150 vl.values_len = 5;
151 vl.time = time (NULL);
152 strcpy (vl.host, hostname_g);
153 strcpy (vl.plugin, "mysql");
155 plugin_dispatch_values ("mysql_qcache", &vl);
156 } /* void qcache_submit */
158 static void threads_submit (gauge_t running, gauge_t connected, gauge_t cached,
159 counter_t created)
160 {
161 value_t values[4];
162 value_list_t vl = VALUE_LIST_INIT;
164 values[0].gauge = running;
165 values[1].gauge = connected;
166 values[2].gauge = cached;
167 values[3].counter = created;
169 vl.values = values;
170 vl.values_len = 4;
171 vl.time = time (NULL);
172 strcpy (vl.host, hostname_g);
173 strcpy (vl.plugin, "mysql");
175 plugin_dispatch_values ("mysql_threads", &vl);
176 } /* void threads_submit */
178 static void traffic_submit (counter_t rx, counter_t tx)
179 {
180 value_t values[2];
181 value_list_t vl = VALUE_LIST_INIT;
183 values[0].counter = rx;
184 values[1].counter = tx;
186 vl.values = values;
187 vl.values_len = 2;
188 vl.time = time (NULL);
189 strcpy (vl.host, hostname_g);
190 strcpy (vl.plugin, "mysql");
192 plugin_dispatch_values ("mysql_octets", &vl);
193 } /* void traffic_submit */
195 static int mysql_read (void)
196 {
197 MYSQL *con;
198 MYSQL_RES *res;
199 MYSQL_ROW row;
200 char *query;
201 int query_len;
202 int field_num;
204 unsigned long long qcache_hits = 0ULL;
205 unsigned long long qcache_inserts = 0ULL;
206 unsigned long long qcache_not_cached = 0ULL;
207 unsigned long long qcache_lowmem_prunes = 0ULL;
208 int qcache_queries_in_cache = -1;
210 int threads_running = -1;
211 int threads_connected = -1;
212 int threads_cached = -1;
213 unsigned long long threads_created = 0ULL;
215 unsigned long long traffic_incoming = 0ULL;
216 unsigned long long traffic_outgoing = 0ULL;
218 /* An error message will have been printed in this case */
219 if ((con = getconnection ()) == NULL)
220 return (-1);
222 query = "SHOW STATUS";
223 if (mysql_get_server_version (con) >= 50002)
224 query = "SHOW GLOBAL STATUS";
226 query_len = strlen (query);
228 if (mysql_real_query (con, query, query_len))
229 {
230 ERROR ("mysql_real_query failed: %s\n",
231 mysql_error (con));
232 return (-1);
233 }
235 if ((res = mysql_store_result (con)) == NULL)
236 {
237 ERROR ("mysql_store_result failed: %s\n",
238 mysql_error (con));
239 return (-1);
240 }
242 field_num = mysql_num_fields (res);
243 while ((row = mysql_fetch_row (res)))
244 {
245 char *key;
246 unsigned long long val;
248 key = row[0];
249 val = atoll (row[1]);
251 if (strncmp (key, "Com_", 4) == 0)
252 {
253 if (val == 0ULL)
254 continue;
256 /* Ignore `prepared statements' */
257 if (strncmp (key, "Com_stmt_", 9) != 0)
258 counter_submit ("mysql_commands", key + 4, val);
259 }
260 else if (strncmp (key, "Handler_", 8) == 0)
261 {
262 if (val == 0ULL)
263 continue;
265 counter_submit ("mysql_handler", key + 8, val);
266 }
267 else if (strncmp (key, "Qcache_", 7) == 0)
268 {
269 if (strcmp (key, "Qcache_hits") == 0)
270 qcache_hits = val;
271 else if (strcmp (key, "Qcache_inserts") == 0)
272 qcache_inserts = val;
273 else if (strcmp (key, "Qcache_not_cached") == 0)
274 qcache_not_cached = val;
275 else if (strcmp (key, "Qcache_lowmem_prunes") == 0)
276 qcache_lowmem_prunes = val;
277 else if (strcmp (key, "Qcache_queries_in_cache") == 0)
278 qcache_queries_in_cache = (int) val;
279 }
280 else if (strncmp (key, "Bytes_", 6) == 0)
281 {
282 if (strcmp (key, "Bytes_received") == 0)
283 traffic_incoming += val;
284 else if (strcmp (key, "Bytes_sent") == 0)
285 traffic_outgoing += val;
286 }
287 else if (strncmp (key, "Threads_", 8) == 0)
288 {
289 if (strcmp (key, "Threads_running") == 0)
290 threads_running = (int) val;
291 else if (strcmp (key, "Threads_connected") == 0)
292 threads_connected = (int) val;
293 else if (strcmp (key, "Threads_cached") == 0)
294 threads_cached = (int) val;
295 else if (strcmp (key, "Threads_created") == 0)
296 threads_created = val;
297 }
298 }
299 mysql_free_result (res); res = NULL;
301 if ((qcache_hits != 0ULL)
302 || (qcache_inserts != 0ULL)
303 || (qcache_not_cached != 0ULL)
304 || (qcache_lowmem_prunes != 0ULL))
305 qcache_submit (qcache_hits, qcache_inserts, qcache_not_cached,
306 qcache_lowmem_prunes, qcache_queries_in_cache);
308 if (threads_created != 0ULL)
309 threads_submit (threads_running, threads_connected,
310 threads_cached, threads_created);
312 traffic_submit (traffic_incoming, traffic_outgoing);
314 /* mysql_close (con); */
316 return (0);
317 } /* int mysql_read */
319 void module_register (void)
320 {
321 plugin_register_config ("mysql", config, config_keys, config_keys_num);
322 plugin_register_read ("mysql", mysql_read);
323 } /* void module_register */