6295a53f79d39b67670de86066495790766a08fe
1 /**
2 * collectd - src/rrdcached.c
3 * Copyright (C) 2008 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 "plugin.h"
24 #include "common.h"
25 #include "utils_rrdcreate.h"
27 #include <rrd_client.h>
29 /*
30 * Private variables
31 */
32 static const char *config_keys[] =
33 {
34 "DaemonAddress",
35 "DataDir",
36 "CreateFiles",
37 "CollectStatistics"
38 };
39 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
41 static char *datadir = NULL;
42 static char *daemon_address = NULL;
43 static int config_create_files = 1;
44 static int config_collect_stats = 1;
45 static rrdcreate_config_t rrdcreate_config =
46 {
47 /* stepsize = */ 0,
48 /* heartbeat = */ 0,
49 /* rrarows = */ 1200,
50 /* xff = */ 0.1,
52 /* timespans = */ NULL,
53 /* timespans_num = */ 0,
55 /* consolidation_functions = */ NULL,
56 /* consolidation_functions_num = */ 0
57 };
59 static int value_list_to_string (char *buffer, int buffer_len,
60 const data_set_t *ds, const value_list_t *vl)
61 {
62 int offset;
63 int status;
64 int i;
66 assert (0 == strcmp (ds->type, vl->type));
68 memset (buffer, '\0', buffer_len);
70 status = ssnprintf (buffer, buffer_len, "%u", (unsigned int) vl->time);
71 if ((status < 1) || (status >= buffer_len))
72 return (-1);
73 offset = status;
75 for (i = 0; i < ds->ds_num; i++)
76 {
77 if ((ds->ds[i].type != DS_TYPE_COUNTER)
78 && (ds->ds[i].type != DS_TYPE_GAUGE)
79 && (ds->ds[i].type != DS_TYPE_DERIVE)
80 && (ds->ds[i].type != DS_TYPE_ABSOLUTE)
81 return (-1);
83 if (ds->ds[i].type == DS_TYPE_COUNTER)
84 {
85 status = ssnprintf (buffer + offset, buffer_len - offset,
86 ":%llu", vl->values[i].counter);
87 }
88 else if (ds->ds[i].type == DS_TYPE_GAUGE)
89 {
90 status = ssnprintf (buffer + offset, buffer_len - offset,
91 ":%lf", vl->values[i].gauge);
92 }
93 else if (ds->ds[i].type == DS_TYPE_DERIVE) {
94 status = ssnprintf (buffer + offset, buffer_len - offset,
95 ":%llu", vl->values[i].derive);
96 }
97 else /* if (ds->ds[i].type == DS_TYPE_ABSOLUTE) */ {
98 status = ssnprintf (buffer + offset, buffer_len - offset,
99 ":%llu", vl->values[i].absolute);
101 }
103 if ((status < 1) || (status >= (buffer_len - offset)))
104 return (-1);
106 offset += status;
107 } /* for ds->ds_num */
109 return (0);
110 } /* int value_list_to_string */
112 static int value_list_to_filename (char *buffer, int buffer_len,
113 const data_set_t *ds, const value_list_t *vl)
114 {
115 int offset = 0;
116 int status;
118 assert (0 == strcmp (ds->type, vl->type));
120 if (datadir != NULL)
121 {
122 status = ssnprintf (buffer + offset, buffer_len - offset,
123 "%s/", datadir);
124 if ((status < 1) || (status >= buffer_len - offset))
125 return (-1);
126 offset += status;
127 }
129 status = ssnprintf (buffer + offset, buffer_len - offset,
130 "%s/", vl->host);
131 if ((status < 1) || (status >= buffer_len - offset))
132 return (-1);
133 offset += status;
135 if (strlen (vl->plugin_instance) > 0)
136 status = ssnprintf (buffer + offset, buffer_len - offset,
137 "%s-%s/", vl->plugin, vl->plugin_instance);
138 else
139 status = ssnprintf (buffer + offset, buffer_len - offset,
140 "%s/", vl->plugin);
141 if ((status < 1) || (status >= buffer_len - offset))
142 return (-1);
143 offset += status;
145 if (strlen (vl->type_instance) > 0)
146 status = ssnprintf (buffer + offset, buffer_len - offset,
147 "%s-%s", vl->type, vl->type_instance);
148 else
149 status = ssnprintf (buffer + offset, buffer_len - offset,
150 "%s", vl->type);
151 if ((status < 1) || (status >= buffer_len - offset))
152 return (-1);
153 offset += status;
155 strncpy (buffer + offset, ".rrd", buffer_len - offset);
156 buffer[buffer_len - 1] = 0;
158 return (0);
159 } /* int value_list_to_filename */
161 static int rc_config (const char *key, const char *value)
162 {
163 if (strcasecmp ("DataDir", key) == 0)
164 {
165 if (datadir != NULL)
166 free (datadir);
167 datadir = strdup (value);
168 if (datadir != NULL)
169 {
170 int len = strlen (datadir);
171 while ((len > 0) && (datadir[len - 1] == '/'))
172 {
173 len--;
174 datadir[len] = '\0';
175 }
176 if (len <= 0)
177 {
178 free (datadir);
179 datadir = NULL;
180 }
181 }
182 }
183 else if (strcasecmp ("DaemonAddress", key) == 0)
184 {
185 sfree (daemon_address);
186 daemon_address = strdup (value);
187 if (daemon_address == NULL)
188 {
189 ERROR ("rrdcached plugin: strdup failed.");
190 return (1);
191 }
192 }
193 else if (strcasecmp ("CreateFiles", key) == 0)
194 {
195 if ((strcasecmp ("false", value) == 0)
196 || (strcasecmp ("no", value) == 0)
197 || (strcasecmp ("off", value) == 0))
198 config_create_files = 0;
199 else
200 config_create_files = 1;
201 }
202 else if (strcasecmp ("CollectStatistics", key) == 0)
203 {
204 if ((strcasecmp ("false", value) == 0)
205 || (strcasecmp ("no", value) == 0)
206 || (strcasecmp ("off", value) == 0))
207 config_collect_stats = 0;
208 else
209 config_collect_stats = 1;
210 }
211 else
212 {
213 return (-1);
214 }
215 return (0);
216 } /* int rc_config */
218 static int rc_read (void)
219 {
220 int status;
221 rrdc_stats_t *head;
222 rrdc_stats_t *ptr;
224 value_t values[1];
225 value_list_t vl = VALUE_LIST_INIT;
227 if (daemon_address == NULL)
228 return (-1);
230 if (config_collect_stats == 0)
231 return (-1);
233 vl.values = values;
234 vl.values_len = 1;
236 if ((strncmp ("unix:", daemon_address, strlen ("unix:")) == 0)
237 || (daemon_address[0] == '/'))
238 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
239 else
240 sstrncpy (vl.host, daemon_address, sizeof (vl.host));
241 sstrncpy (vl.plugin, "rrdcached", sizeof (vl.plugin));
243 head = NULL;
244 status = rrdc_stats_get (&head);
245 if (status != 0)
246 {
247 ERROR ("rrdcached plugin: rrdc_stats_get failed with status %i.", status);
248 return (-1);
249 }
251 for (ptr = head; ptr != NULL; ptr = ptr->next)
252 {
253 if (ptr->type == RRDC_STATS_TYPE_GAUGE)
254 values[0].gauge = (gauge_t) ptr->value.gauge;
255 else if (ptr->type == RRDC_STATS_TYPE_COUNTER)
256 values[0].counter = (counter_t) ptr->value.counter;
257 else
258 continue;
260 if (strcasecmp ("QueueLength", ptr->name) == 0)
261 {
262 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
263 sstrncpy (vl.type_instance, "", sizeof (vl.type_instance));
264 }
265 else if (strcasecmp ("UpdatesWritten", ptr->name) == 0)
266 {
267 sstrncpy (vl.type, "operations", sizeof (vl.type));
268 sstrncpy (vl.type_instance, "write-updates", sizeof (vl.type_instance));
269 }
270 else if (strcasecmp ("DataSetsWritten", ptr->name) == 0)
271 {
272 sstrncpy (vl.type, "operations", sizeof (vl.type));
273 sstrncpy (vl.type_instance, "write-data_sets",
274 sizeof (vl.type_instance));
275 }
276 else if (strcasecmp ("TreeNodesNumber", ptr->name) == 0)
277 {
278 sstrncpy (vl.type, "gauge", sizeof (vl.type));
279 sstrncpy (vl.type_instance, "tree_nodes", sizeof (vl.type_instance));
280 }
281 else if (strcasecmp ("TreeDepth", ptr->name) == 0)
282 {
283 sstrncpy (vl.type, "gauge", sizeof (vl.type));
284 sstrncpy (vl.type_instance, "tree_depth", sizeof (vl.type_instance));
285 }
286 else if (strcasecmp ("FlushesReceived", ptr->name) == 0)
287 {
288 sstrncpy (vl.type, "operations", sizeof (vl.type));
289 sstrncpy (vl.type_instance, "receive-flush", sizeof (vl.type_instance));
290 }
291 else if (strcasecmp ("JournalBytes", ptr->name) == 0)
292 {
293 sstrncpy (vl.type, "counter", sizeof (vl.type));
294 sstrncpy (vl.type_instance, "journal-bytes", sizeof (vl.type_instance));
295 }
296 else if (strcasecmp ("JournalRotate", ptr->name) == 0)
297 {
298 sstrncpy (vl.type, "counter", sizeof (vl.type));
299 sstrncpy (vl.type_instance, "journal-rotates", sizeof (vl.type_instance));
300 }
301 else if (strcasecmp ("UpdatesReceived", ptr->name) == 0)
302 {
303 sstrncpy (vl.type, "operations", sizeof (vl.type));
304 sstrncpy (vl.type_instance, "receive-update", sizeof (vl.type_instance));
305 }
306 else
307 {
308 DEBUG ("rrdcached plugin: rc_read: Unknown statistic `%s'.", ptr->name);
309 continue;
310 }
312 plugin_dispatch_values (&vl);
313 } /* for (ptr = head; ptr != NULL; ptr = ptr->next) */
315 rrdc_stats_free (head);
317 return (0);
318 } /* int rc_read */
320 static int rc_init (void)
321 {
322 if (config_collect_stats != 0)
323 plugin_register_read ("rrdcached", rc_read);
325 return (0);
326 } /* int rc_init */
328 static int rc_write (const data_set_t *ds, const value_list_t *vl,
329 user_data_t __attribute__((unused)) *user_data)
330 {
331 char filename[512];
332 char values[512];
333 char *values_array[2];
334 int status;
336 if (daemon_address == NULL)
337 {
338 ERROR ("rrdcached plugin: daemon_address == NULL.");
339 plugin_unregister_write ("rrdcached");
340 return (-1);
341 }
343 if (strcmp (ds->type, vl->type) != 0)
344 {
345 ERROR ("rrdcached plugin: DS type does not match value list type");
346 return (-1);
347 }
349 if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
350 {
351 ERROR ("rrdcached plugin: value_list_to_filename failed.");
352 return (-1);
353 }
355 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
356 {
357 ERROR ("rrdcached plugin: value_list_to_string failed.");
358 return (-1);
359 }
361 values_array[0] = values;
362 values_array[1] = NULL;
364 if (config_create_files != 0)
365 {
366 struct stat statbuf;
368 status = stat (filename, &statbuf);
369 if (status != 0)
370 {
371 if (errno != ENOENT)
372 {
373 char errbuf[1024];
374 ERROR ("rrdcached plugin: stat (%s) failed: %s",
375 filename, sstrerror (errno, errbuf, sizeof (errbuf)));
376 return (-1);
377 }
379 status = cu_rrd_create_file (filename, ds, vl, &rrdcreate_config);
380 if (status != 0)
381 {
382 ERROR ("rrdcached plugin: cu_rrd_create_file (%s) failed.",
383 filename);
384 return (-1);
385 }
386 }
387 }
389 status = rrdc_connect (daemon_address);
390 if (status != 0)
391 {
392 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
393 daemon_address, status);
394 return (-1);
395 }
397 status = rrdc_update (filename, /* values_num = */ 1, (void *) values_array);
398 if (status != 0)
399 {
400 ERROR ("rrdcached plugin: rrdc_update (%s, [%s], 1) failed with "
401 "status %i.",
402 filename, values_array[0], status);
403 return (-1);
404 }
406 return (0);
407 } /* int rc_write */
409 static int rc_shutdown (void)
410 {
411 rrdc_disconnect ();
412 return (0);
413 } /* int rc_shutdown */
415 void module_register (void)
416 {
417 plugin_register_config ("rrdcached", rc_config,
418 config_keys, config_keys_num);
419 plugin_register_init ("rrdcached", rc_init);
420 plugin_register_write ("rrdcached", rc_write, /* user_data = */ NULL);
421 plugin_register_shutdown ("rrdcached", rc_shutdown);
422 } /* void module_register */
424 /*
425 * vim: set sw=2 sts=2 et :
426 */