a392715616ff7fb501cc8294db0461a9412bb62a
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 #undef HAVE_CONFIG_H
28 #include <rrd.h>
29 #include <rrd_client.h>
31 /*
32 * Private variables
33 */
34 static char *datadir = NULL;
35 static char *daemon_address = NULL;
36 static int config_create_files = 1;
37 static int config_collect_stats = 1;
38 static rrdcreate_config_t rrdcreate_config =
39 {
40 /* stepsize = */ 0,
41 /* heartbeat = */ 0,
42 /* rrarows = */ 1200,
43 /* xff = */ 0.1,
45 /* timespans = */ NULL,
46 /* timespans_num = */ 0,
48 /* consolidation_functions = */ NULL,
49 /* consolidation_functions_num = */ 0
50 };
52 static int value_list_to_string (char *buffer, int buffer_len,
53 const data_set_t *ds, const value_list_t *vl)
54 {
55 int offset;
56 int status;
57 int i;
58 time_t t;
60 assert (0 == strcmp (ds->type, vl->type));
62 memset (buffer, '\0', buffer_len);
64 t = CDTIME_T_TO_TIME_T (vl->time);
65 status = ssnprintf (buffer, buffer_len, "%lu", (unsigned long) t);
66 if ((status < 1) || (status >= buffer_len))
67 return (-1);
68 offset = status;
70 for (i = 0; i < ds->ds_num; i++)
71 {
72 if ((ds->ds[i].type != DS_TYPE_COUNTER)
73 && (ds->ds[i].type != DS_TYPE_GAUGE)
74 && (ds->ds[i].type != DS_TYPE_DERIVE)
75 && (ds->ds[i].type != DS_TYPE_ABSOLUTE))
76 return (-1);
78 if (ds->ds[i].type == DS_TYPE_COUNTER)
79 {
80 status = ssnprintf (buffer + offset, buffer_len - offset,
81 ":%llu", vl->values[i].counter);
82 }
83 else if (ds->ds[i].type == DS_TYPE_GAUGE)
84 {
85 status = ssnprintf (buffer + offset, buffer_len - offset,
86 ":%f", vl->values[i].gauge);
87 }
88 else if (ds->ds[i].type == DS_TYPE_DERIVE) {
89 status = ssnprintf (buffer + offset, buffer_len - offset,
90 ":%"PRIi64, vl->values[i].derive);
91 }
92 else /* if (ds->ds[i].type == DS_TYPE_ABSOLUTE) */ {
93 status = ssnprintf (buffer + offset, buffer_len - offset,
94 ":%"PRIu64, vl->values[i].absolute);
96 }
98 if ((status < 1) || (status >= (buffer_len - offset)))
99 return (-1);
101 offset += status;
102 } /* for ds->ds_num */
104 return (0);
105 } /* int value_list_to_string */
107 static int value_list_to_filename (char *buffer, int buffer_len,
108 const data_set_t *ds, const value_list_t *vl)
109 {
110 int offset = 0;
111 int status;
113 assert (0 == strcmp (ds->type, vl->type));
115 if (datadir != NULL)
116 {
117 status = ssnprintf (buffer + offset, buffer_len - offset,
118 "%s/", datadir);
119 if ((status < 1) || (status >= buffer_len - offset))
120 return (-1);
121 offset += status;
122 }
124 status = ssnprintf (buffer + offset, buffer_len - offset,
125 "%s/", vl->host);
126 if ((status < 1) || (status >= buffer_len - offset))
127 return (-1);
128 offset += status;
130 if (strlen (vl->plugin_instance) > 0)
131 status = ssnprintf (buffer + offset, buffer_len - offset,
132 "%s-%s/", vl->plugin, vl->plugin_instance);
133 else
134 status = ssnprintf (buffer + offset, buffer_len - offset,
135 "%s/", vl->plugin);
136 if ((status < 1) || (status >= buffer_len - offset))
137 return (-1);
138 offset += status;
140 if (strlen (vl->type_instance) > 0)
141 status = ssnprintf (buffer + offset, buffer_len - offset,
142 "%s-%s", vl->type, vl->type_instance);
143 else
144 status = ssnprintf (buffer + offset, buffer_len - offset,
145 "%s", vl->type);
146 if ((status < 1) || (status >= buffer_len - offset))
147 return (-1);
148 offset += status;
150 strncpy (buffer + offset, ".rrd", buffer_len - offset);
151 buffer[buffer_len - 1] = 0;
153 return (0);
154 } /* int value_list_to_filename */
156 static const char *config_get_string (oconfig_item_t *ci)
157 {
158 if ((ci->children_num != 0) || (ci->values_num != 1)
159 || (ci->values[0].type != OCONFIG_TYPE_STRING))
160 {
161 ERROR ("rrdcached plugin: %s expects a single string argument.",
162 ci->key);
163 return (NULL);
164 }
166 return (ci->values[0].value.string);
167 } /* const char *config_get_string */
169 static int rc_config (oconfig_item_t *ci)
170 {
171 int i;
173 for (i = 0; i < ci->children_num; ++i) {
174 const char *key = ci->children[i].key;
175 const char *value = config_get_string (ci->children + i);
177 if (value == NULL) /* config_get_strings prints error message */
178 continue;
180 if (strcasecmp ("DataDir", key) == 0)
181 {
182 if (datadir != NULL)
183 free (datadir);
184 datadir = strdup (value);
185 if (datadir != NULL)
186 {
187 int len = strlen (datadir);
188 while ((len > 0) && (datadir[len - 1] == '/'))
189 {
190 len--;
191 datadir[len] = '\0';
192 }
193 if (len <= 0)
194 {
195 free (datadir);
196 datadir = NULL;
197 }
198 }
199 }
200 else if (strcasecmp ("DaemonAddress", key) == 0)
201 {
202 sfree (daemon_address);
203 daemon_address = strdup (value);
204 if (daemon_address == NULL)
205 {
206 ERROR ("rrdcached plugin: strdup failed.");
207 continue;
208 }
209 }
210 else if (strcasecmp ("CreateFiles", key) == 0)
211 {
212 if (IS_FALSE (value))
213 config_create_files = 0;
214 else
215 config_create_files = 1;
216 }
217 else if (strcasecmp ("CollectStatistics", key) == 0)
218 {
219 if (IS_FALSE (value))
220 config_collect_stats = 0;
221 else
222 config_collect_stats = 1;
223 }
224 else
225 {
226 WARNING ("rrdcached plugin: Ignoring invalid option %s.", key);
227 continue;
228 }
229 }
230 return (0);
231 } /* int rc_config */
233 static int rc_read (void)
234 {
235 int status;
236 rrdc_stats_t *head;
237 rrdc_stats_t *ptr;
239 value_t values[1];
240 value_list_t vl = VALUE_LIST_INIT;
242 if (daemon_address == NULL)
243 return (-1);
245 if (config_collect_stats == 0)
246 return (-1);
248 vl.values = values;
249 vl.values_len = 1;
251 if ((strncmp ("unix:", daemon_address, strlen ("unix:")) == 0)
252 || (daemon_address[0] == '/'))
253 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
254 else
255 sstrncpy (vl.host, daemon_address, sizeof (vl.host));
256 sstrncpy (vl.plugin, "rrdcached", sizeof (vl.plugin));
258 head = NULL;
259 status = rrdc_stats_get (&head);
260 if (status != 0)
261 {
262 ERROR ("rrdcached plugin: rrdc_stats_get failed with status %i.", status);
263 return (-1);
264 }
266 for (ptr = head; ptr != NULL; ptr = ptr->next)
267 {
268 if (ptr->type == RRDC_STATS_TYPE_GAUGE)
269 values[0].gauge = (gauge_t) ptr->value.gauge;
270 else if (ptr->type == RRDC_STATS_TYPE_COUNTER)
271 values[0].counter = (counter_t) ptr->value.counter;
272 else
273 continue;
275 if (strcasecmp ("QueueLength", ptr->name) == 0)
276 {
277 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
278 sstrncpy (vl.type_instance, "", sizeof (vl.type_instance));
279 }
280 else if (strcasecmp ("UpdatesWritten", ptr->name) == 0)
281 {
282 sstrncpy (vl.type, "operations", sizeof (vl.type));
283 sstrncpy (vl.type_instance, "write-updates", sizeof (vl.type_instance));
284 }
285 else if (strcasecmp ("DataSetsWritten", ptr->name) == 0)
286 {
287 sstrncpy (vl.type, "operations", sizeof (vl.type));
288 sstrncpy (vl.type_instance, "write-data_sets",
289 sizeof (vl.type_instance));
290 }
291 else if (strcasecmp ("TreeNodesNumber", ptr->name) == 0)
292 {
293 sstrncpy (vl.type, "gauge", sizeof (vl.type));
294 sstrncpy (vl.type_instance, "tree_nodes", sizeof (vl.type_instance));
295 }
296 else if (strcasecmp ("TreeDepth", ptr->name) == 0)
297 {
298 sstrncpy (vl.type, "gauge", sizeof (vl.type));
299 sstrncpy (vl.type_instance, "tree_depth", sizeof (vl.type_instance));
300 }
301 else if (strcasecmp ("FlushesReceived", ptr->name) == 0)
302 {
303 sstrncpy (vl.type, "operations", sizeof (vl.type));
304 sstrncpy (vl.type_instance, "receive-flush", sizeof (vl.type_instance));
305 }
306 else if (strcasecmp ("JournalBytes", ptr->name) == 0)
307 {
308 sstrncpy (vl.type, "counter", sizeof (vl.type));
309 sstrncpy (vl.type_instance, "journal-bytes", sizeof (vl.type_instance));
310 }
311 else if (strcasecmp ("JournalRotate", ptr->name) == 0)
312 {
313 sstrncpy (vl.type, "counter", sizeof (vl.type));
314 sstrncpy (vl.type_instance, "journal-rotates", sizeof (vl.type_instance));
315 }
316 else if (strcasecmp ("UpdatesReceived", ptr->name) == 0)
317 {
318 sstrncpy (vl.type, "operations", sizeof (vl.type));
319 sstrncpy (vl.type_instance, "receive-update", sizeof (vl.type_instance));
320 }
321 else
322 {
323 DEBUG ("rrdcached plugin: rc_read: Unknown statistic `%s'.", ptr->name);
324 continue;
325 }
327 plugin_dispatch_values (&vl);
328 } /* for (ptr = head; ptr != NULL; ptr = ptr->next) */
330 rrdc_stats_free (head);
332 return (0);
333 } /* int rc_read */
335 static int rc_init (void)
336 {
337 if (config_collect_stats != 0)
338 plugin_register_read ("rrdcached", rc_read);
340 return (0);
341 } /* int rc_init */
343 static int rc_write (const data_set_t *ds, const value_list_t *vl,
344 user_data_t __attribute__((unused)) *user_data)
345 {
346 char filename[PATH_MAX];
347 char values[512];
348 char *values_array[2];
349 int status;
351 if (daemon_address == NULL)
352 {
353 ERROR ("rrdcached plugin: daemon_address == NULL.");
354 plugin_unregister_write ("rrdcached");
355 return (-1);
356 }
358 if (strcmp (ds->type, vl->type) != 0)
359 {
360 ERROR ("rrdcached plugin: DS type does not match value list type");
361 return (-1);
362 }
364 if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
365 {
366 ERROR ("rrdcached plugin: value_list_to_filename failed.");
367 return (-1);
368 }
370 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
371 {
372 ERROR ("rrdcached plugin: value_list_to_string failed.");
373 return (-1);
374 }
376 values_array[0] = values;
377 values_array[1] = NULL;
379 if (config_create_files != 0)
380 {
381 struct stat statbuf;
383 status = stat (filename, &statbuf);
384 if (status != 0)
385 {
386 if (errno != ENOENT)
387 {
388 char errbuf[1024];
389 ERROR ("rrdcached plugin: stat (%s) failed: %s",
390 filename, sstrerror (errno, errbuf, sizeof (errbuf)));
391 return (-1);
392 }
394 status = cu_rrd_create_file (filename, ds, vl, &rrdcreate_config);
395 if (status != 0)
396 {
397 ERROR ("rrdcached plugin: cu_rrd_create_file (%s) failed.",
398 filename);
399 return (-1);
400 }
401 }
402 }
404 status = rrdc_connect (daemon_address);
405 if (status != 0)
406 {
407 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
408 daemon_address, status);
409 return (-1);
410 }
412 status = rrdc_update (filename, /* values_num = */ 1, (void *) values_array);
413 if (status != 0)
414 {
415 ERROR ("rrdcached plugin: rrdc_update (%s, [%s], 1) failed with "
416 "status %i.",
417 filename, values_array[0], status);
418 return (-1);
419 }
421 return (0);
422 } /* int rc_write */
424 static int rc_flush (__attribute__((unused)) cdtime_t timeout, /* {{{ */
425 const char *identifier,
426 __attribute__((unused)) user_data_t *ud)
427 {
428 char filename[PATH_MAX + 1];
429 int status;
431 if (identifier == NULL)
432 return (EINVAL);
434 if (datadir != NULL)
435 ssnprintf (filename, sizeof (filename), "%s/%s.rrd", datadir, identifier);
436 else
437 ssnprintf (filename, sizeof (filename), "%s.rrd", identifier);
439 status = rrdc_connect (daemon_address);
440 if (status != 0)
441 {
442 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
443 daemon_address, status);
444 return (-1);
445 }
447 status = rrdc_flush (filename);
448 if (status != 0)
449 {
450 ERROR ("rrdcached plugin: rrdc_flush (%s) failed with status %i.",
451 filename, status);
452 return (-1);
453 }
454 DEBUG ("rrdcached plugin: rrdc_flush (%s): Success.", filename);
456 return (0);
457 } /* }}} int rc_flush */
459 static int rc_shutdown (void)
460 {
461 rrdc_disconnect ();
462 return (0);
463 } /* int rc_shutdown */
465 void module_register (void)
466 {
467 plugin_register_complex_config ("rrdcached", rc_config);
468 plugin_register_init ("rrdcached", rc_init);
469 plugin_register_write ("rrdcached", rc_write, /* user_data = */ NULL);
470 plugin_register_flush ("rrdcached", rc_flush, /* user_data = */ NULL);
471 plugin_register_shutdown ("rrdcached", rc_shutdown);
472 } /* void module_register */
474 /*
475 * vim: set sw=2 sts=2 et :
476 */