1 /**
2 * collectd - src/write_riemann.c
3 *
4 * Copyright (C) 2012,2013 Pierre-Yves Ritschard
5 * Copyright (C) 2013 Florian octo Forster
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 *
19 * Authors:
20 * Pierre-Yves Ritschard <pyr at spootnik.org>
21 * Florian octo Forster <octo at collectd.org>
22 */
24 #include "collectd.h"
25 #include "plugin.h"
26 #include "common.h"
27 #include "configfile.h"
28 #include "utils_cache.h"
29 #include "riemann.pb-c.h"
31 #include <sys/socket.h>
32 #include <arpa/inet.h>
33 #include <errno.h>
34 #include <netdb.h>
35 #include <inttypes.h>
36 #include <pthread.h>
38 #define RIEMANN_HOST "localhost"
39 #define RIEMANN_PORT "5555"
41 struct riemann_host {
42 char *name;
43 #define F_CONNECT 0x01
44 uint8_t flags;
45 pthread_mutex_t lock;
46 _Bool store_rates;
47 char *node;
48 char *service;
49 int s;
51 int reference_count;
52 };
54 static char **riemann_tags;
55 static size_t riemann_tags_num;
57 static int riemann_send(struct riemann_host *, Msg const *);
58 static int riemann_notification(const notification_t *, user_data_t *);
59 static int riemann_write(const data_set_t *, const value_list_t *, user_data_t *);
60 static int riemann_connect(struct riemann_host *);
61 static int riemann_disconnect (struct riemann_host *host);
62 static void riemann_free(void *);
63 static int riemann_config_node(oconfig_item_t *);
64 static int riemann_config(oconfig_item_t *);
65 void module_register(void);
67 static void riemann_event_protobuf_free (Event *event) /* {{{ */
68 {
69 if (event == NULL)
70 return;
72 sfree (event->state);
73 sfree (event->service);
74 sfree (event->host);
75 sfree (event->description);
77 strarray_free (event->tags, event->n_tags);
78 event->tags = NULL;
79 event->n_tags = 0;
81 sfree (event);
82 } /* }}} void riemann_event_protobuf_free */
84 static void riemann_msg_protobuf_free (Msg *msg) /* {{{ */
85 {
86 size_t i;
88 if (msg == NULL)
89 return;
91 for (i = 0; i < msg->n_events; i++)
92 {
93 riemann_event_protobuf_free (msg->events[i]);
94 msg->events[i] = NULL;
95 }
97 sfree (msg->events);
98 msg->n_events = 0;
100 sfree (msg);
101 } /* }}} void riemann_msg_protobuf_free */
103 static int
104 riemann_send(struct riemann_host *host, Msg const *msg)
105 {
106 u_char *buffer;
107 size_t buffer_len;
108 int status;
110 pthread_mutex_lock (&host->lock);
112 status = riemann_connect (host);
113 if (status != 0)
114 {
115 pthread_mutex_unlock (&host->lock);
116 return status;
117 }
119 buffer_len = msg__get_packed_size(msg);
120 buffer = malloc (buffer_len);
121 if (buffer == NULL) {
122 pthread_mutex_unlock (&host->lock);
123 ERROR ("write_riemann plugin: malloc failed.");
124 return ENOMEM;
125 }
126 memset (buffer, 0, buffer_len);
128 msg__pack(msg, buffer);
130 status = (int) swrite (host->s, buffer, buffer_len);
131 if (status != 0)
132 {
133 char errbuf[1024];
135 riemann_disconnect (host);
136 pthread_mutex_unlock (&host->lock);
138 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s failed: %s",
139 (host->node != NULL) ? host->node : RIEMANN_HOST,
140 (host->service != NULL) ? host->service : RIEMANN_PORT,
141 sstrerror (errno, errbuf, sizeof (errbuf)));
142 sfree (buffer);
143 return -1;
144 }
146 pthread_mutex_unlock (&host->lock);
147 sfree (buffer);
148 return 0;
149 }
151 static int riemann_event_add_tag (Event *event, /* {{{ */
152 char const *format, ...)
153 {
154 va_list ap;
155 char buffer[1024];
156 size_t ret;
158 va_start (ap, format);
159 ret = vsnprintf (buffer, sizeof (buffer), format, ap);
160 if (ret >= sizeof (buffer))
161 ret = sizeof (buffer) - 1;
162 buffer[ret] = 0;
163 va_end (ap);
165 return (strarray_add (&event->tags, &event->n_tags, buffer));
166 } /* }}} int riemann_event_add_tag */
168 static Msg *riemann_notification_to_protobuf (struct riemann_host *host, /* {{{ */
169 notification_t const *n)
170 {
171 Msg *msg;
172 Event *event;
173 char service_buffer[6 * DATA_MAX_NAME_LEN];
174 char const *severity;
175 notification_meta_t *meta;
176 int i;
178 msg = malloc (sizeof (*msg));
179 if (msg == NULL)
180 {
181 ERROR ("write_riemann plugin: malloc failed.");
182 return (NULL);
183 }
184 memset (msg, 0, sizeof (*msg));
185 msg__init (msg);
187 msg->events = malloc (sizeof (*msg->events));
188 if (msg->events == NULL)
189 {
190 ERROR ("write_riemann plugin: malloc failed.");
191 sfree (msg);
192 return (NULL);
193 }
195 event = malloc (sizeof (*event));
196 if (event == NULL)
197 {
198 ERROR ("write_riemann plugin: malloc failed.");
199 sfree (msg->events);
200 sfree (msg);
201 return (NULL);
202 }
203 memset (event, 0, sizeof (*event));
204 event__init (event);
206 msg->events[0] = event;
207 msg->n_events = 1;
209 event->host = strdup (n->host);
210 event->time = CDTIME_T_TO_TIME_T (n->time);
211 event->has_time = 1;
213 switch (n->severity)
214 {
215 case NOTIF_OKAY: severity = "okay"; break;
216 case NOTIF_WARNING: severity = "warning"; break;
217 case NOTIF_FAILURE: severity = "failure"; break;
218 default: severity = "unknown";
219 }
220 event->state = strdup (severity);
222 riemann_event_add_tag (event, "notification");
223 if (n->plugin[0] != 0)
224 riemann_event_add_tag (event, "plugin:%s", n->plugin);
225 if (n->plugin_instance[0] != 0)
226 riemann_event_add_tag (event, "plugin_instance:%s",
227 n->plugin_instance);
229 if (n->type[0] != 0)
230 riemann_event_add_tag (event, "type:%s", n->type);
231 if (n->type_instance[0] != 0)
232 riemann_event_add_tag (event, "type_instance:%s",
233 n->type_instance);
235 for (i = 0; i < riemann_tags_num; i++)
236 riemann_event_add_tag (event, "%s", riemann_tags[i]);
238 format_name (service_buffer, sizeof (service_buffer),
239 /* host = */ "", n->plugin, n->plugin_instance,
240 n->type, n->type_instance);
241 event->service = strdup (&service_buffer[1]);
243 /* Pull in values from threshold */
244 for (meta = n->meta; meta != NULL; meta = meta->next)
245 {
246 if (strcasecmp ("CurrentValue", meta->name) != 0)
247 continue;
249 event->metric_d = meta->nm_value.nm_double;
250 event->has_metric_d = 1;
251 break;
252 }
254 DEBUG ("write_riemann plugin: Successfully created protobuf for notification: "
255 "host = \"%s\", service = \"%s\", state = \"%s\"",
256 event->host, event->service, event->state);
257 return (msg);
258 } /* }}} Msg *riemann_notification_to_protobuf */
260 static Event *riemann_value_to_protobuf (struct riemann_host const *host, /* {{{ */
261 data_set_t const *ds,
262 value_list_t const *vl, size_t index,
263 gauge_t const *rates)
264 {
265 Event *event;
266 char name_buffer[5 * DATA_MAX_NAME_LEN];
267 char service_buffer[6 * DATA_MAX_NAME_LEN];
268 int i;
270 event = malloc (sizeof (*event));
271 if (event == NULL)
272 {
273 ERROR ("write_riemann plugin: malloc failed.");
274 return (NULL);
275 }
276 memset (event, 0, sizeof (*event));
277 event__init (event);
279 event->host = strdup (vl->host);
280 event->time = CDTIME_T_TO_TIME_T (vl->time);
281 event->has_time = 1;
282 event->ttl = CDTIME_T_TO_TIME_T (2 * vl->interval);
283 event->has_ttl = 1;
285 riemann_event_add_tag (event, "plugin:%s", vl->plugin);
286 if (vl->plugin_instance[0] != 0)
287 riemann_event_add_tag (event, "plugin_instance:%s",
288 vl->plugin_instance);
290 riemann_event_add_tag (event, "type:%s", vl->type);
291 if (vl->type_instance[0] != 0)
292 riemann_event_add_tag (event, "type_instance:%s",
293 vl->type_instance);
295 if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL))
296 {
297 riemann_event_add_tag (event, "ds_type:%s:rate",
298 DS_TYPE_TO_STRING(ds->ds[index].type));
299 }
300 else
301 {
302 riemann_event_add_tag (event, "ds_type:%s",
303 DS_TYPE_TO_STRING(ds->ds[index].type));
304 }
305 riemann_event_add_tag (event, "ds_name:%s", ds->ds[index].name);
306 riemann_event_add_tag (event, "ds_index:%zu", index);
308 for (i = 0; i < riemann_tags_num; i++)
309 riemann_event_add_tag (event, "%s", riemann_tags[i]);
311 if (ds->ds[index].type == DS_TYPE_GAUGE)
312 {
313 event->has_metric_d = 1;
314 event->metric_d = (double) vl->values[index].gauge;
315 }
316 else if (rates != NULL)
317 {
318 event->has_metric_d = 1;
319 event->metric_d = (double) rates[index];
320 }
321 else
322 {
323 event->has_metric_sint64 = 1;
324 if (ds->ds[index].type == DS_TYPE_DERIVE)
325 event->metric_sint64 = (int64_t) vl->values[index].derive;
326 else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
327 event->metric_sint64 = (int64_t) vl->values[index].absolute;
328 else
329 event->metric_sint64 = (int64_t) vl->values[index].counter;
330 }
332 format_name (name_buffer, sizeof (name_buffer),
333 /* host = */ "", vl->plugin, vl->plugin_instance,
334 vl->type, vl->type_instance);
335 if (ds->ds_num > 1)
336 ssnprintf (service_buffer, sizeof (service_buffer),
337 "%s/%s", &name_buffer[1], ds->ds[index].name);
338 else
339 sstrncpy (service_buffer, &name_buffer[1],
340 sizeof (service_buffer));
342 event->service = strdup (service_buffer);
344 DEBUG ("write_riemann plugin: Successfully created protobuf for metric: "
345 "host = \"%s\", service = \"%s\"",
346 event->host, event->service);
347 return (event);
348 } /* }}} Event *riemann_value_to_protobuf */
350 static Msg *riemann_value_list_to_protobuf (struct riemann_host const *host, /* {{{ */
351 data_set_t const *ds,
352 value_list_t const *vl)
353 {
354 Msg *msg;
355 size_t i;
356 gauge_t *rates = NULL;
358 /* Initialize the Msg structure. */
359 msg = malloc (sizeof (*msg));
360 if (msg == NULL)
361 {
362 ERROR ("write_riemann plugin: malloc failed.");
363 return (NULL);
364 }
365 memset (msg, 0, sizeof (*msg));
366 msg__init (msg);
368 /* Set up events. First, the list of pointers. */
369 msg->n_events = (size_t) vl->values_len;
370 msg->events = calloc (msg->n_events, sizeof (*msg->events));
371 if (msg->events == NULL)
372 {
373 ERROR ("write_riemann plugin: calloc failed.");
374 riemann_msg_protobuf_free (msg);
375 return (NULL);
376 }
378 if (host->store_rates)
379 {
380 rates = uc_get_rate (ds, vl);
381 if (rates == NULL)
382 {
383 ERROR ("write_riemann plugin: uc_get_rate failed.");
384 riemann_msg_protobuf_free (msg);
385 return (NULL);
386 }
387 }
389 for (i = 0; i < msg->n_events; i++)
390 {
391 msg->events[i] = riemann_value_to_protobuf (host, ds, vl,
392 (int) i, rates);
393 if (msg->events[i] == NULL)
394 {
395 riemann_msg_protobuf_free (msg);
396 sfree (rates);
397 return (NULL);
398 }
399 }
401 sfree (rates);
402 return (msg);
403 } /* }}} Msg *riemann_value_list_to_protobuf */
405 static int
406 riemann_notification(const notification_t *n, user_data_t *ud)
407 {
408 int status;
409 struct riemann_host *host = ud->data;
410 Msg *msg;
412 msg = riemann_notification_to_protobuf (host, n);
413 if (msg == NULL)
414 return (-1);
416 status = riemann_send (host, msg);
417 if (status != 0)
418 ERROR ("write_riemann plugin: riemann_send failed with status %i",
419 status);
421 riemann_msg_protobuf_free (msg);
422 return (status);
423 } /* }}} int riemann_notification */
425 static int
426 riemann_write(const data_set_t *ds,
427 const value_list_t *vl,
428 user_data_t *ud)
429 {
430 int status;
431 struct riemann_host *host = ud->data;
432 Msg *msg;
434 msg = riemann_value_list_to_protobuf (host, ds, vl);
435 if (msg == NULL)
436 return (-1);
438 status = riemann_send (host, msg);
439 if (status != 0)
440 ERROR ("write_riemann plugin: riemann_send failed with status %i",
441 status);
443 riemann_msg_protobuf_free (msg);
444 return status;
445 }
447 /* host->lock must be held when calling this function. */
448 static int
449 riemann_connect(struct riemann_host *host)
450 {
451 int e;
452 struct addrinfo *ai, *res, hints;
453 char const *node;
454 char const *service;
456 if (host->flags & F_CONNECT)
457 return 0;
459 memset(&hints, 0, sizeof(hints));
460 memset(&service, 0, sizeof(service));
461 hints.ai_family = AF_UNSPEC;
462 hints.ai_socktype = SOCK_DGRAM;
463 #ifdef AI_ADDRCONFIG
464 hints.ai_flags |= AI_ADDRCONFIG;
465 #endif
467 node = (host->node != NULL) ? host->node : RIEMANN_HOST;
468 service = (host->service != NULL) ? host->service : RIEMANN_PORT;
470 if ((e = getaddrinfo(node, service, &hints, &res)) != 0) {
471 ERROR ("write_riemann plugin: Unable to resolve host \"%s\": %s",
472 node, gai_strerror(e));
473 return -1;
474 }
476 host->s = -1;
477 for (ai = res; ai != NULL; ai = ai->ai_next) {
478 if ((host->s = socket(ai->ai_family,
479 ai->ai_socktype,
480 ai->ai_protocol)) == -1) {
481 continue;
482 }
484 if (connect(host->s, ai->ai_addr, ai->ai_addrlen) != 0) {
485 close(host->s);
486 host->s = -1;
487 continue;
488 }
490 host->flags |= F_CONNECT;
491 DEBUG("write_riemann plugin: got a succesful connection for: %s:%s",
492 node, service);
493 break;
494 }
496 freeaddrinfo(res);
498 if (host->s < 0) {
499 WARNING("write_riemann plugin: Unable to connect to Riemann at %s:%s",
500 node, service);
501 return -1;
502 }
503 return 0;
504 }
506 /* host->lock must be held when calling this function. */
507 static int
508 riemann_disconnect (struct riemann_host *host)
509 {
510 if ((host->flags & F_CONNECT) == 0)
511 return (0);
513 close (host->s);
514 host->s = -1;
515 host->flags &= ~F_CONNECT;
517 return (0);
518 }
520 static void
521 riemann_free(void *p)
522 {
523 struct riemann_host *host = p;
525 if (host == NULL)
526 return;
528 pthread_mutex_lock (&host->lock);
530 host->reference_count--;
531 if (host->reference_count > 0)
532 {
533 pthread_mutex_unlock (&host->lock);
534 return;
535 }
537 riemann_disconnect (host);
539 sfree(host->service);
540 pthread_mutex_destroy (&host->lock);
541 sfree(host);
542 }
544 static int
545 riemann_config_node(oconfig_item_t *ci)
546 {
547 struct riemann_host *host = NULL;
548 int status = 0;
549 int i;
550 oconfig_item_t *child;
551 char callback_name[DATA_MAX_NAME_LEN];
552 user_data_t ud;
554 if ((host = calloc(1, sizeof (*host))) == NULL) {
555 ERROR ("write_riemann plugin: calloc failed.");
556 return ENOMEM;
557 }
558 pthread_mutex_init (&host->lock, NULL);
559 host->reference_count = 1;
560 host->node = NULL;
561 host->service = NULL;
562 host->store_rates = 1;
564 status = cf_util_get_string (ci, &host->name);
565 if (status != 0) {
566 WARNING("write_riemann plugin: Required host name is missing.");
567 riemann_free (host);
568 return -1;
569 }
571 for (i = 0; i < ci->children_num; i++) {
572 /*
573 * The code here could be simplified but makes room
574 * for easy adding of new options later on.
575 */
576 child = &ci->children[i];
577 status = 0;
579 if (strcasecmp ("Host", child->key) == 0) {
580 status = cf_util_get_string (child, &host->node);
581 if (status != 0)
582 break;
583 } else if (strcasecmp ("Port", child->key) == 0) {
584 status = cf_util_get_service (child, &host->service);
585 if (status != 0) {
586 ERROR ("write_riemann plugin: Invalid argument "
587 "configured for the \"Port\" "
588 "option.");
589 break;
590 }
591 } else if (strcasecmp ("StoreRates", child->key) == 0) {
592 status = cf_util_get_boolean (child, &host->store_rates);
593 if (status != 0)
594 break;
595 } else {
596 WARNING("write_riemann plugin: ignoring unknown config "
597 "option: \"%s\"", child->key);
598 }
599 }
600 if (status != 0) {
601 riemann_free (host);
602 return status;
603 }
605 ssnprintf (callback_name, sizeof (callback_name), "write_riemann/%s",
606 host->name);
607 ud.data = host;
608 ud.free_func = riemann_free;
610 pthread_mutex_lock (&host->lock);
612 status = plugin_register_write (callback_name, riemann_write, &ud);
613 if (status != 0)
614 WARNING ("write_riemann plugin: plugin_register_write (\"%s\") "
615 "failed with status %i.",
616 callback_name, status);
617 else /* success */
618 host->reference_count++;
620 status = plugin_register_notification (callback_name,
621 riemann_notification, &ud);
622 if (status != 0)
623 WARNING ("write_riemann plugin: plugin_register_notification (\"%s\") "
624 "failed with status %i.",
625 callback_name, status);
626 else /* success */
627 host->reference_count++;
629 if (host->reference_count <= 1)
630 {
631 /* Both callbacks failed => free memory.
632 * We need to unlock here, because riemann_free() will lock.
633 * This is not a race condition, because we're the only one
634 * holding a reference. */
635 pthread_mutex_unlock (&host->lock);
636 riemann_free (host);
637 return (-1);
638 }
640 host->reference_count--;
641 pthread_mutex_unlock (&host->lock);
643 return status;
644 }
646 static int
647 riemann_config(oconfig_item_t *ci)
648 {
649 int i;
650 oconfig_item_t *child;
651 int status;
653 for (i = 0; i < ci->children_num; i++) {
654 child = &ci->children[i];
656 if (strcasecmp("Node", child->key) == 0) {
657 riemann_config_node (child);
658 } else if (strcasecmp(child->key, "tag") == 0) {
659 char *tmp = NULL;
660 status = cf_util_get_string(child, &tmp);
661 if (status != 0)
662 continue;
664 strarray_add (&riemann_tags, &riemann_tags_num, tmp);
665 DEBUG("write_riemann plugin: Got tag: %s", tmp);
666 sfree (tmp);
667 } else {
668 WARNING ("write_riemann plugin: Ignoring unknown "
669 "configuration option \"%s\" at top level.",
670 child->key);
671 }
672 }
673 return (0);
674 }
676 void
677 module_register(void)
678 {
679 plugin_register_complex_config ("write_riemann", riemann_config);
680 }
682 /* vim: set sw=8 sts=8 ts=8 noet : */