1 /**
2 * collectd - src/rrdcached.c
3 * Copyright (C) 2008-2013 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 **/
27 #include "collectd.h"
29 #include "plugin.h"
30 #include "common.h"
31 #include "utils_rrdcreate.h"
33 #undef HAVE_CONFIG_H
34 #include <rrd.h>
35 #include <rrd_client.h>
37 /*
38 * Private variables
39 */
40 static char *datadir = NULL;
41 static char *daemon_address = NULL;
42 static _Bool config_create_files = 1;
43 static _Bool config_collect_stats = 1;
44 static rrdcreate_config_t rrdcreate_config =
45 {
46 /* stepsize = */ 0,
47 /* heartbeat = */ 0,
48 /* rrarows = */ 1200,
49 /* xff = */ 0.1,
51 /* timespans = */ NULL,
52 /* timespans_num = */ 0,
54 /* consolidation_functions = */ NULL,
55 /* consolidation_functions_num = */ 0,
57 /* async = */ 0
58 };
60 /*
61 * Prototypes.
62 */
63 static int rc_write (const data_set_t *ds, const value_list_t *vl,
64 user_data_t __attribute__((unused)) *user_data);
65 static int rc_flush (__attribute__((unused)) cdtime_t timeout,
66 const char *identifier, __attribute__((unused)) user_data_t *ud);
68 static int value_list_to_string (char *buffer, int buffer_len,
69 const data_set_t *ds, const value_list_t *vl)
70 {
71 int offset;
72 int status;
73 time_t t;
75 assert (0 == strcmp (ds->type, vl->type));
77 memset (buffer, '\0', buffer_len);
79 t = CDTIME_T_TO_TIME_T (vl->time);
80 status = ssnprintf (buffer, buffer_len, "%lu", (unsigned long) t);
81 if ((status < 1) || (status >= buffer_len))
82 return (-1);
83 offset = status;
85 for (size_t i = 0; i < ds->ds_num; i++)
86 {
87 if ((ds->ds[i].type != DS_TYPE_COUNTER)
88 && (ds->ds[i].type != DS_TYPE_GAUGE)
89 && (ds->ds[i].type != DS_TYPE_DERIVE)
90 && (ds->ds[i].type != DS_TYPE_ABSOLUTE))
91 return (-1);
93 if (ds->ds[i].type == DS_TYPE_COUNTER)
94 {
95 status = ssnprintf (buffer + offset, buffer_len - offset,
96 ":%llu", vl->values[i].counter);
97 }
98 else if (ds->ds[i].type == DS_TYPE_GAUGE)
99 {
100 status = ssnprintf (buffer + offset, buffer_len - offset,
101 ":%f", vl->values[i].gauge);
102 }
103 else if (ds->ds[i].type == DS_TYPE_DERIVE) {
104 status = ssnprintf (buffer + offset, buffer_len - offset,
105 ":%"PRIi64, vl->values[i].derive);
106 }
107 else /* if (ds->ds[i].type == DS_TYPE_ABSOLUTE) */ {
108 status = ssnprintf (buffer + offset, buffer_len - offset,
109 ":%"PRIu64, vl->values[i].absolute);
111 }
113 if ((status < 1) || (status >= (buffer_len - offset)))
114 return (-1);
116 offset += status;
117 } /* for ds->ds_num */
119 return (0);
120 } /* int value_list_to_string */
122 static int value_list_to_filename (char *buffer, size_t buffer_size,
123 value_list_t const *vl)
124 {
125 char const suffix[] = ".rrd";
126 int status;
127 size_t len;
129 if (datadir != NULL)
130 {
131 size_t datadir_len = strlen (datadir) + 1;
133 if (datadir_len >= buffer_size)
134 return (ENOMEM);
136 sstrncpy (buffer, datadir, buffer_size);
137 buffer[datadir_len - 1] = '/';
138 buffer[datadir_len] = 0;
140 buffer += datadir_len;
141 buffer_size -= datadir_len;
142 }
144 status = FORMAT_VL (buffer, buffer_size, vl);
145 if (status != 0)
146 return (status);
148 len = strlen (buffer);
149 assert (len < buffer_size);
150 buffer += len;
151 buffer_size -= len;
153 if (buffer_size <= sizeof (suffix))
154 return (ENOMEM);
156 memcpy (buffer, suffix, sizeof (suffix));
157 return (0);
158 } /* int value_list_to_filename */
160 static int rc_config_get_int_positive (oconfig_item_t const *ci, int *ret)
161 {
162 int status;
163 int tmp = 0;
165 status = cf_util_get_int (ci, &tmp);
166 if (status != 0)
167 return (status);
168 if (tmp < 0)
169 return (EINVAL);
171 *ret = tmp;
172 return (0);
173 } /* int rc_config_get_int_positive */
175 static int rc_config_get_xff (oconfig_item_t const *ci, double *ret)
176 {
177 double value;
179 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
180 {
181 ERROR ("rrdcached plugin: The \"%s\" needs exactly one numeric argument "
182 "in the range [0.0, 1.0)", ci->key);
183 return (EINVAL);
184 }
186 value = ci->values[0].value.number;
187 if ((value >= 0.0) && (value < 1.0))
188 {
189 *ret = value;
190 return (0);
191 }
193 ERROR ("rrdcached plugin: The \"%s\" needs exactly one numeric argument "
194 "in the range [0.0, 1.0)", ci->key);
195 return (EINVAL);
196 } /* int rc_config_get_xff */
198 static int rc_config_add_timespan (int timespan)
199 {
200 int *tmp;
202 if (timespan <= 0)
203 return (EINVAL);
205 tmp = realloc (rrdcreate_config.timespans,
206 sizeof (*rrdcreate_config.timespans)
207 * (rrdcreate_config.timespans_num + 1));
208 if (tmp == NULL)
209 return (ENOMEM);
210 rrdcreate_config.timespans = tmp;
212 rrdcreate_config.timespans[rrdcreate_config.timespans_num] = timespan;
213 rrdcreate_config.timespans_num++;
215 return (0);
216 } /* int rc_config_add_timespan */
218 static int rc_config (oconfig_item_t *ci)
219 {
220 for (int i = 0; i < ci->children_num; i++)
221 {
222 oconfig_item_t const *child = ci->children + i;
223 const char *key = child->key;
224 int status = 0;
226 if (strcasecmp ("DataDir", key) == 0)
227 {
228 status = cf_util_get_string (child, &datadir);
229 if (status == 0)
230 {
231 int len = strlen (datadir);
233 while ((len > 0) && (datadir[len - 1] == '/'))
234 {
235 len--;
236 datadir[len] = 0;
237 }
239 if (len <= 0)
240 sfree (datadir);
241 }
242 }
243 else if (strcasecmp ("DaemonAddress", key) == 0)
244 status = cf_util_get_string (child, &daemon_address);
245 else if (strcasecmp ("CreateFiles", key) == 0)
246 status = cf_util_get_boolean (child, &config_create_files);
247 else if (strcasecmp ("CreateFilesAsync", key) == 0)
248 status = cf_util_get_boolean (child, &rrdcreate_config.async);
249 else if (strcasecmp ("CollectStatistics", key) == 0)
250 status = cf_util_get_boolean (child, &config_collect_stats);
251 else if (strcasecmp ("StepSize", key) == 0)
252 {
253 int tmp = -1;
255 status = rc_config_get_int_positive (child, &tmp);
256 if (status == 0)
257 rrdcreate_config.stepsize = (unsigned long) tmp;
258 }
259 else if (strcasecmp ("HeartBeat", key) == 0)
260 status = rc_config_get_int_positive (child, &rrdcreate_config.heartbeat);
261 else if (strcasecmp ("RRARows", key) == 0)
262 status = rc_config_get_int_positive (child, &rrdcreate_config.rrarows);
263 else if (strcasecmp ("RRATimespan", key) == 0)
264 {
265 int tmp = -1;
266 status = rc_config_get_int_positive (child, &tmp);
267 if (status == 0)
268 status = rc_config_add_timespan (tmp);
269 }
270 else if (strcasecmp ("XFF", key) == 0)
271 status = rc_config_get_xff (child, &rrdcreate_config.xff);
272 else
273 {
274 WARNING ("rrdcached plugin: Ignoring invalid option %s.", key);
275 continue;
276 }
278 if (status != 0)
279 WARNING ("rrdcached plugin: Handling the \"%s\" option failed.", key);
280 }
282 if (daemon_address != NULL)
283 {
284 plugin_register_write ("rrdcached", rc_write, /* user_data = */ NULL);
285 plugin_register_flush ("rrdcached", rc_flush, /* user_data = */ NULL);
286 }
287 return (0);
288 } /* int rc_config */
290 static int rc_read (void)
291 {
292 int status;
293 rrdc_stats_t *head;
295 value_list_t vl = VALUE_LIST_INIT;
296 vl.values = &(value_t) { .gauge = NAN };
297 vl.values_len = 1;
299 if (daemon_address == NULL)
300 return (-1);
302 if (!config_collect_stats)
303 return (-1);
305 if ((strncmp ("unix:", daemon_address, strlen ("unix:")) == 0)
306 || (daemon_address[0] == '/'))
307 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
308 else
309 sstrncpy (vl.host, daemon_address, sizeof (vl.host));
310 sstrncpy (vl.plugin, "rrdcached", sizeof (vl.plugin));
312 status = rrdc_connect (daemon_address);
313 if (status != 0)
314 {
315 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
316 daemon_address, status);
317 return (-1);
318 }
320 head = NULL;
321 status = rrdc_stats_get (&head);
322 if (status != 0)
323 {
324 ERROR ("rrdcached plugin: rrdc_stats_get failed with status %i.", status);
325 return (-1);
326 }
328 for (rrdc_stats_t *ptr = head; ptr != NULL; ptr = ptr->next)
329 {
330 if (ptr->type == RRDC_STATS_TYPE_GAUGE)
331 vl.values[0].gauge = (gauge_t) ptr->value.gauge;
332 else if (ptr->type == RRDC_STATS_TYPE_COUNTER)
333 vl.values[0].counter = (counter_t) ptr->value.counter;
334 else
335 continue;
337 if (strcasecmp ("QueueLength", ptr->name) == 0)
338 {
339 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
340 sstrncpy (vl.type_instance, "", sizeof (vl.type_instance));
341 }
342 else if (strcasecmp ("UpdatesWritten", ptr->name) == 0)
343 {
344 sstrncpy (vl.type, "operations", sizeof (vl.type));
345 sstrncpy (vl.type_instance, "write-updates", sizeof (vl.type_instance));
346 }
347 else if (strcasecmp ("DataSetsWritten", ptr->name) == 0)
348 {
349 sstrncpy (vl.type, "operations", sizeof (vl.type));
350 sstrncpy (vl.type_instance, "write-data_sets",
351 sizeof (vl.type_instance));
352 }
353 else if (strcasecmp ("TreeNodesNumber", ptr->name) == 0)
354 {
355 sstrncpy (vl.type, "gauge", sizeof (vl.type));
356 sstrncpy (vl.type_instance, "tree_nodes", sizeof (vl.type_instance));
357 }
358 else if (strcasecmp ("TreeDepth", ptr->name) == 0)
359 {
360 sstrncpy (vl.type, "gauge", sizeof (vl.type));
361 sstrncpy (vl.type_instance, "tree_depth", sizeof (vl.type_instance));
362 }
363 else if (strcasecmp ("FlushesReceived", ptr->name) == 0)
364 {
365 sstrncpy (vl.type, "operations", sizeof (vl.type));
366 sstrncpy (vl.type_instance, "receive-flush", sizeof (vl.type_instance));
367 }
368 else if (strcasecmp ("JournalBytes", ptr->name) == 0)
369 {
370 sstrncpy (vl.type, "counter", sizeof (vl.type));
371 sstrncpy (vl.type_instance, "journal-bytes", sizeof (vl.type_instance));
372 }
373 else if (strcasecmp ("JournalRotate", ptr->name) == 0)
374 {
375 sstrncpy (vl.type, "counter", sizeof (vl.type));
376 sstrncpy (vl.type_instance, "journal-rotates", sizeof (vl.type_instance));
377 }
378 else if (strcasecmp ("UpdatesReceived", ptr->name) == 0)
379 {
380 sstrncpy (vl.type, "operations", sizeof (vl.type));
381 sstrncpy (vl.type_instance, "receive-update", sizeof (vl.type_instance));
382 }
383 else
384 {
385 DEBUG ("rrdcached plugin: rc_read: Unknown statistic `%s'.", ptr->name);
386 continue;
387 }
389 plugin_dispatch_values (&vl);
390 } /* for (ptr = head; ptr != NULL; ptr = ptr->next) */
392 rrdc_stats_free (head);
394 return (0);
395 } /* int rc_read */
397 static int rc_init (void)
398 {
399 if (config_collect_stats)
400 plugin_register_read ("rrdcached", rc_read);
402 return (0);
403 } /* int rc_init */
405 static int rc_write (const data_set_t *ds, const value_list_t *vl,
406 user_data_t __attribute__((unused)) *user_data)
407 {
408 char filename[PATH_MAX];
409 char values[512];
410 char *values_array[2];
411 int status;
413 if (daemon_address == NULL)
414 {
415 ERROR ("rrdcached plugin: daemon_address == NULL.");
416 plugin_unregister_write ("rrdcached");
417 return (-1);
418 }
420 if (strcmp (ds->type, vl->type) != 0)
421 {
422 ERROR ("rrdcached plugin: DS type does not match value list type");
423 return (-1);
424 }
426 if (value_list_to_filename (filename, sizeof (filename), vl) != 0)
427 {
428 ERROR ("rrdcached plugin: value_list_to_filename failed.");
429 return (-1);
430 }
432 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
433 {
434 ERROR ("rrdcached plugin: value_list_to_string failed.");
435 return (-1);
436 }
438 values_array[0] = values;
439 values_array[1] = NULL;
441 if (config_create_files)
442 {
443 struct stat statbuf;
445 status = stat (filename, &statbuf);
446 if (status != 0)
447 {
448 if (errno != ENOENT)
449 {
450 char errbuf[1024];
451 ERROR ("rrdcached plugin: stat (%s) failed: %s",
452 filename, sstrerror (errno, errbuf, sizeof (errbuf)));
453 return (-1);
454 }
456 status = cu_rrd_create_file (filename, ds, vl, &rrdcreate_config);
457 if (status != 0)
458 {
459 ERROR ("rrdcached plugin: cu_rrd_create_file (%s) failed.",
460 filename);
461 return (-1);
462 }
463 else if (rrdcreate_config.async)
464 return (0);
465 }
466 }
468 status = rrdc_connect (daemon_address);
469 if (status != 0)
470 {
471 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
472 daemon_address, status);
473 return (-1);
474 }
476 status = rrdc_update (filename, /* values_num = */ 1, (void *) values_array);
477 if (status != 0)
478 {
479 ERROR ("rrdcached plugin: rrdc_update (%s, [%s], 1) failed with "
480 "status %i.",
481 filename, values_array[0], status);
482 return (-1);
483 }
485 return (0);
486 } /* int rc_write */
488 static int rc_flush (__attribute__((unused)) cdtime_t timeout, /* {{{ */
489 const char *identifier,
490 __attribute__((unused)) user_data_t *ud)
491 {
492 char filename[PATH_MAX + 1];
493 int status;
495 if (identifier == NULL)
496 return (EINVAL);
498 if (datadir != NULL)
499 ssnprintf (filename, sizeof (filename), "%s/%s.rrd", datadir, identifier);
500 else
501 ssnprintf (filename, sizeof (filename), "%s.rrd", identifier);
503 status = rrdc_connect (daemon_address);
504 if (status != 0)
505 {
506 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
507 daemon_address, status);
508 return (-1);
509 }
511 status = rrdc_flush (filename);
512 if (status != 0)
513 {
514 ERROR ("rrdcached plugin: rrdc_flush (%s) failed with status %i.",
515 filename, status);
516 return (-1);
517 }
518 DEBUG ("rrdcached plugin: rrdc_flush (%s): Success.", filename);
520 return (0);
521 } /* }}} int rc_flush */
523 static int rc_shutdown (void)
524 {
525 rrdc_disconnect ();
526 return (0);
527 } /* int rc_shutdown */
529 void module_register (void)
530 {
531 plugin_register_complex_config ("rrdcached", rc_config);
532 plugin_register_init ("rrdcached", rc_init);
533 plugin_register_shutdown ("rrdcached", rc_shutdown);
534 } /* void module_register */
536 /*
537 * vim: set sw=2 sts=2 et :
538 */