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"
40 #define RIEMANN_TTL_FACTOR 2.0
42 struct riemann_host {
43 char *name;
44 #define F_CONNECT 0x01
45 uint8_t flags;
46 pthread_mutex_t lock;
47 _Bool store_rates;
48 _Bool always_append_ds;
49 char *node;
50 char *service;
51 _Bool use_tcp;
52 int s;
53 double ttl_factor;
55 int reference_count;
56 };
58 static char **riemann_tags;
59 static size_t riemann_tags_num;
61 static void riemann_event_protobuf_free (Event *event) /* {{{ */
62 {
63 size_t i;
65 if (event == NULL)
66 return;
68 sfree (event->state);
69 sfree (event->service);
70 sfree (event->host);
71 sfree (event->description);
73 strarray_free (event->tags, event->n_tags);
74 event->tags = NULL;
75 event->n_tags = 0;
77 for (i = 0; i < event->n_attributes; i++)
78 {
79 sfree (event->attributes[i]->key);
80 sfree (event->attributes[i]->value);
81 sfree (event->attributes[i]);
82 }
83 sfree (event->attributes);
84 event->n_attributes = 0;
86 sfree (event);
87 } /* }}} void riemann_event_protobuf_free */
89 static void riemann_msg_protobuf_free(Msg *msg) /* {{{ */
90 {
91 size_t i;
93 if (msg == NULL)
94 return;
96 for (i = 0; i < msg->n_events; i++)
97 {
98 riemann_event_protobuf_free (msg->events[i]);
99 msg->events[i] = NULL;
100 }
102 sfree (msg->events);
103 msg->n_events = 0;
105 sfree (msg);
106 } /* }}} void riemann_msg_protobuf_free */
108 /* host->lock must be held when calling this function. */
109 static int riemann_connect(struct riemann_host *host) /* {{{ */
110 {
111 int e;
112 struct addrinfo *ai, *res, hints;
113 char const *node;
114 char const *service;
116 if (host->flags & F_CONNECT)
117 return 0;
119 memset(&hints, 0, sizeof(hints));
120 memset(&service, 0, sizeof(service));
121 hints.ai_family = AF_UNSPEC;
122 hints.ai_socktype = host->use_tcp ? SOCK_STREAM : SOCK_DGRAM;
123 #ifdef AI_ADDRCONFIG
124 hints.ai_flags |= AI_ADDRCONFIG;
125 #endif
127 node = (host->node != NULL) ? host->node : RIEMANN_HOST;
128 service = (host->service != NULL) ? host->service : RIEMANN_PORT;
130 if ((e = getaddrinfo(node, service, &hints, &res)) != 0) {
131 ERROR ("write_riemann plugin: Unable to resolve host \"%s\": %s",
132 node, gai_strerror(e));
133 return -1;
134 }
136 host->s = -1;
137 for (ai = res; ai != NULL; ai = ai->ai_next) {
138 if ((host->s = socket(ai->ai_family,
139 ai->ai_socktype,
140 ai->ai_protocol)) == -1) {
141 continue;
142 }
144 if (connect(host->s, ai->ai_addr, ai->ai_addrlen) != 0) {
145 close(host->s);
146 host->s = -1;
147 continue;
148 }
150 host->flags |= F_CONNECT;
151 DEBUG("write_riemann plugin: got a succesful connection for: %s:%s",
152 node, service);
153 break;
154 }
156 freeaddrinfo(res);
158 if (host->s < 0) {
159 WARNING("write_riemann plugin: Unable to connect to Riemann at %s:%s",
160 node, service);
161 return -1;
162 }
163 return 0;
164 } /* }}} int riemann_connect */
166 /* host->lock must be held when calling this function. */
167 static int riemann_disconnect (struct riemann_host *host) /* {{{ */
168 {
169 if ((host->flags & F_CONNECT) == 0)
170 return (0);
172 close (host->s);
173 host->s = -1;
174 host->flags &= ~F_CONNECT;
176 return (0);
177 } /* }}} int riemann_disconnect */
179 static int riemann_send_msg (struct riemann_host *host, const Msg *msg) /* {{{ */
180 {
181 int status = 0;
182 u_char *buffer = NULL;
183 size_t buffer_len;
185 status = riemann_connect (host);
186 if (status != 0)
187 return status;
189 buffer_len = msg__get_packed_size(msg);
191 if (host->use_tcp)
192 buffer_len += 4;
194 buffer = malloc (buffer_len);
195 if (buffer == NULL) {
196 ERROR ("write_riemann plugin: malloc failed.");
197 return ENOMEM;
198 }
199 memset (buffer, 0, buffer_len);
201 if (host->use_tcp)
202 {
203 uint32_t length = htonl ((uint32_t) (buffer_len - 4));
204 memcpy (buffer, &length, 4);
205 msg__pack(msg, buffer + 4);
206 }
207 else
208 {
209 msg__pack(msg, buffer);
210 }
212 status = (int) swrite (host->s, buffer, buffer_len);
213 if (status != 0)
214 {
215 char errbuf[1024];
216 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s failed: %s",
217 (host->node != NULL) ? host->node : RIEMANN_HOST,
218 (host->service != NULL) ? host->service : RIEMANN_PORT,
219 sstrerror (errno, errbuf, sizeof (errbuf)));
220 sfree (buffer);
221 return -1;
222 }
224 sfree (buffer);
225 return 0;
226 } /* }}} int riemann_send_msg */
228 static int riemann_recv_ack(struct riemann_host *host) /* {{{ */
229 {
230 int status = 0;
231 Msg *msg = NULL;
232 uint32_t header;
234 status = (int) sread (host->s, &header, 4);
236 if (status != 0)
237 return -1;
239 size_t size = ntohl(header);
241 // Buffer on the stack since acknowledges are typically small.
242 u_char buffer[size];
243 memset (buffer, 0, size);
245 status = (int) sread (host->s, buffer, size);
247 if (status != 0)
248 return status;
250 msg = msg__unpack (NULL, size, buffer);
252 if (msg == NULL)
253 return -1;
255 if (!msg->ok)
256 {
257 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s acknowledgement message reported error: %s",
258 (host->node != NULL) ? host->node : RIEMANN_HOST,
259 (host->service != NULL) ? host->service : RIEMANN_PORT,
260 msg->error);
262 msg__free_unpacked(msg, NULL);
263 return -1;
264 }
266 msg__free_unpacked (msg, NULL);
267 return 0;
268 } /* }}} int riemann_recv_ack */
270 /**
271 * Function to send messages (Msg) to riemann.
272 *
273 * Acquires the host lock, disconnects on errors.
274 */
275 static int riemann_send(struct riemann_host *host, Msg const *msg) /* {{{ */
276 {
277 int status = 0;
278 pthread_mutex_lock (&host->lock);
280 status = riemann_send_msg(host, msg);
281 if (status != 0) {
282 riemann_disconnect (host);
283 pthread_mutex_unlock (&host->lock);
284 return status;
285 }
287 /*
288 * For TCP we need to receive message acknowledgemenent.
289 */
290 if (host->use_tcp)
291 {
292 status = riemann_recv_ack(host);
294 if (status != 0)
295 {
296 riemann_disconnect (host);
297 pthread_mutex_unlock (&host->lock);
298 return status;
299 }
300 }
302 pthread_mutex_unlock (&host->lock);
303 return 0;
304 } /* }}} int riemann_send */
306 static int riemann_event_add_tag (Event *event, char const *tag) /* {{{ */
307 {
308 return (strarray_add (&event->tags, &event->n_tags, tag));
309 } /* }}} int riemann_event_add_tag */
311 static int riemann_event_add_attribute(Event *event, /* {{{ */
312 char const *key, char const *value)
313 {
314 Attribute **new_attributes;
315 Attribute *a;
317 new_attributes = realloc (event->attributes,
318 sizeof (*event->attributes) * (event->n_attributes + 1));
319 if (new_attributes == NULL)
320 {
321 ERROR ("write_riemann plugin: realloc failed.");
322 return (ENOMEM);
323 }
324 event->attributes = new_attributes;
326 a = malloc (sizeof (*a));
327 if (a == NULL)
328 {
329 ERROR ("write_riemann plugin: malloc failed.");
330 return (ENOMEM);
331 }
332 attribute__init (a);
334 a->key = strdup (key);
335 if (value != NULL)
336 a->value = strdup (value);
338 event->attributes[event->n_attributes] = a;
339 event->n_attributes++;
341 return (0);
342 } /* }}} int riemann_event_add_attribute */
344 static Msg *riemann_notification_to_protobuf(struct riemann_host *host, /* {{{ */
345 notification_t const *n)
346 {
347 Msg *msg;
348 Event *event;
349 char service_buffer[6 * DATA_MAX_NAME_LEN];
350 char const *severity;
351 notification_meta_t *meta;
352 int i;
354 msg = malloc (sizeof (*msg));
355 if (msg == NULL)
356 {
357 ERROR ("write_riemann plugin: malloc failed.");
358 return (NULL);
359 }
360 memset (msg, 0, sizeof (*msg));
361 msg__init (msg);
363 msg->events = malloc (sizeof (*msg->events));
364 if (msg->events == NULL)
365 {
366 ERROR ("write_riemann plugin: malloc failed.");
367 sfree (msg);
368 return (NULL);
369 }
371 event = malloc (sizeof (*event));
372 if (event == NULL)
373 {
374 ERROR ("write_riemann plugin: malloc failed.");
375 sfree (msg->events);
376 sfree (msg);
377 return (NULL);
378 }
379 memset (event, 0, sizeof (*event));
380 event__init (event);
382 msg->events[0] = event;
383 msg->n_events = 1;
385 event->host = strdup (n->host);
386 event->time = CDTIME_T_TO_TIME_T (n->time);
387 event->has_time = 1;
389 switch (n->severity)
390 {
391 case NOTIF_OKAY: severity = "ok"; break;
392 case NOTIF_WARNING: severity = "warning"; break;
393 case NOTIF_FAILURE: severity = "critical"; break;
394 default: severity = "unknown";
395 }
396 event->state = strdup (severity);
398 riemann_event_add_tag (event, "notification");
399 if (n->host[0] != 0)
400 riemann_event_add_attribute (event, "host", n->host);
401 if (n->plugin[0] != 0)
402 riemann_event_add_attribute (event, "plugin", n->plugin);
403 if (n->plugin_instance[0] != 0)
404 riemann_event_add_attribute (event, "plugin_instance",
405 n->plugin_instance);
407 if (n->type[0] != 0)
408 riemann_event_add_attribute (event, "type", n->type);
409 if (n->type_instance[0] != 0)
410 riemann_event_add_attribute (event, "type_instance",
411 n->type_instance);
413 for (i = 0; i < riemann_tags_num; i++)
414 riemann_event_add_tag (event, riemann_tags[i]);
416 format_name (service_buffer, sizeof (service_buffer),
417 /* host = */ "", n->plugin, n->plugin_instance,
418 n->type, n->type_instance);
419 event->service = strdup (&service_buffer[1]);
421 /* Pull in values from threshold */
422 for (meta = n->meta; meta != NULL; meta = meta->next)
423 {
424 if (strcasecmp ("CurrentValue", meta->name) != 0)
425 continue;
427 event->metric_d = meta->nm_value.nm_double;
428 event->has_metric_d = 1;
429 break;
430 }
432 DEBUG ("write_riemann plugin: Successfully created protobuf for notification: "
433 "host = \"%s\", service = \"%s\", state = \"%s\"",
434 event->host, event->service, event->state);
435 return (msg);
436 } /* }}} Msg *riemann_notification_to_protobuf */
438 static Event *riemann_value_to_protobuf(struct riemann_host const *host, /* {{{ */
439 data_set_t const *ds,
440 value_list_t const *vl, size_t index,
441 gauge_t const *rates)
442 {
443 Event *event;
444 char name_buffer[5 * DATA_MAX_NAME_LEN];
445 char service_buffer[6 * DATA_MAX_NAME_LEN];
446 double ttl;
447 int i;
449 event = malloc (sizeof (*event));
450 if (event == NULL)
451 {
452 ERROR ("write_riemann plugin: malloc failed.");
453 return (NULL);
454 }
455 memset (event, 0, sizeof (*event));
456 event__init (event);
458 event->host = strdup (vl->host);
459 event->time = CDTIME_T_TO_TIME_T (vl->time);
460 event->has_time = 1;
462 ttl = CDTIME_T_TO_DOUBLE (vl->interval) * host->ttl_factor;
463 event->ttl = (float) ttl;
464 event->has_ttl = 1;
466 riemann_event_add_attribute (event, "plugin", vl->plugin);
467 if (vl->plugin_instance[0] != 0)
468 riemann_event_add_attribute (event, "plugin_instance",
469 vl->plugin_instance);
471 riemann_event_add_attribute (event, "type", vl->type);
472 if (vl->type_instance[0] != 0)
473 riemann_event_add_attribute (event, "type_instance",
474 vl->type_instance);
476 if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL))
477 {
478 char ds_type[DATA_MAX_NAME_LEN];
480 ssnprintf (ds_type, sizeof (ds_type), "%s:rate",
481 DS_TYPE_TO_STRING(ds->ds[index].type));
482 riemann_event_add_attribute (event, "ds_type", ds_type);
483 }
484 else
485 {
486 riemann_event_add_attribute (event, "ds_type",
487 DS_TYPE_TO_STRING(ds->ds[index].type));
488 }
489 riemann_event_add_attribute (event, "ds_name", ds->ds[index].name);
490 {
491 char ds_index[DATA_MAX_NAME_LEN];
493 ssnprintf (ds_index, sizeof (ds_index), "%zu", index);
494 riemann_event_add_attribute (event, "ds_index", ds_index);
495 }
497 for (i = 0; i < riemann_tags_num; i++)
498 riemann_event_add_tag (event, riemann_tags[i]);
500 if (ds->ds[index].type == DS_TYPE_GAUGE)
501 {
502 event->has_metric_d = 1;
503 event->metric_d = (double) vl->values[index].gauge;
504 }
505 else if (rates != NULL)
506 {
507 event->has_metric_d = 1;
508 event->metric_d = (double) rates[index];
509 }
510 else
511 {
512 event->has_metric_sint64 = 1;
513 if (ds->ds[index].type == DS_TYPE_DERIVE)
514 event->metric_sint64 = (int64_t) vl->values[index].derive;
515 else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
516 event->metric_sint64 = (int64_t) vl->values[index].absolute;
517 else
518 event->metric_sint64 = (int64_t) vl->values[index].counter;
519 }
521 format_name (name_buffer, sizeof (name_buffer),
522 /* host = */ "", vl->plugin, vl->plugin_instance,
523 vl->type, vl->type_instance);
524 if (host->always_append_ds || (ds->ds_num > 1))
525 ssnprintf (service_buffer, sizeof (service_buffer),
526 "%s/%s", &name_buffer[1], ds->ds[index].name);
527 else
528 sstrncpy (service_buffer, &name_buffer[1],
529 sizeof (service_buffer));
531 event->service = strdup (service_buffer);
533 DEBUG ("write_riemann plugin: Successfully created protobuf for metric: "
534 "host = \"%s\", service = \"%s\"",
535 event->host, event->service);
536 return (event);
537 } /* }}} Event *riemann_value_to_protobuf */
539 static Msg *riemann_value_list_to_protobuf(struct riemann_host const *host, /* {{{ */
540 data_set_t const *ds,
541 value_list_t const *vl)
542 {
543 Msg *msg;
544 size_t i;
545 gauge_t *rates = NULL;
547 /* Initialize the Msg structure. */
548 msg = malloc (sizeof (*msg));
549 if (msg == NULL)
550 {
551 ERROR ("write_riemann plugin: malloc failed.");
552 return (NULL);
553 }
554 memset (msg, 0, sizeof (*msg));
555 msg__init (msg);
557 /* Set up events. First, the list of pointers. */
558 msg->n_events = (size_t) vl->values_len;
559 msg->events = calloc (msg->n_events, sizeof (*msg->events));
560 if (msg->events == NULL)
561 {
562 ERROR ("write_riemann plugin: calloc failed.");
563 riemann_msg_protobuf_free (msg);
564 return (NULL);
565 }
567 if (host->store_rates)
568 {
569 rates = uc_get_rate (ds, vl);
570 if (rates == NULL)
571 {
572 ERROR ("write_riemann plugin: uc_get_rate failed.");
573 riemann_msg_protobuf_free (msg);
574 return (NULL);
575 }
576 }
578 for (i = 0; i < msg->n_events; i++)
579 {
580 msg->events[i] = riemann_value_to_protobuf (host, ds, vl,
581 (int) i, rates);
582 if (msg->events[i] == NULL)
583 {
584 riemann_msg_protobuf_free (msg);
585 sfree (rates);
586 return (NULL);
587 }
588 }
590 sfree (rates);
591 return (msg);
592 } /* }}} Msg *riemann_value_list_to_protobuf */
594 static int riemann_notification(const notification_t *n, user_data_t *ud) /* {{{ */
595 {
596 int status;
597 struct riemann_host *host = ud->data;
598 Msg *msg;
600 msg = riemann_notification_to_protobuf (host, n);
601 if (msg == NULL)
602 return (-1);
604 status = riemann_send (host, msg);
605 if (status != 0)
606 ERROR ("write_riemann plugin: riemann_send failed with status %i",
607 status);
609 riemann_msg_protobuf_free (msg);
610 return (status);
611 } /* }}} int riemann_notification */
613 static int riemann_write(const data_set_t *ds, /* {{{ */
614 const value_list_t *vl,
615 user_data_t *ud)
616 {
617 int status;
618 struct riemann_host *host = ud->data;
619 Msg *msg;
621 msg = riemann_value_list_to_protobuf (host, ds, vl);
622 if (msg == NULL)
623 return (-1);
625 status = riemann_send (host, msg);
626 if (status != 0)
627 ERROR ("write_riemann plugin: riemann_send failed with status %i",
628 status);
630 riemann_msg_protobuf_free (msg);
631 return status;
632 } /* }}} int riemann_write */
634 static void riemann_free(void *p) /* {{{ */
635 {
636 struct riemann_host *host = p;
638 if (host == NULL)
639 return;
641 pthread_mutex_lock (&host->lock);
643 host->reference_count--;
644 if (host->reference_count > 0)
645 {
646 pthread_mutex_unlock (&host->lock);
647 return;
648 }
650 riemann_disconnect (host);
652 sfree(host->service);
653 pthread_mutex_destroy (&host->lock);
654 sfree(host);
655 } /* }}} void riemann_free */
657 static int riemann_config_node(oconfig_item_t *ci) /* {{{ */
658 {
659 struct riemann_host *host = NULL;
660 int status = 0;
661 int i;
662 oconfig_item_t *child;
663 char callback_name[DATA_MAX_NAME_LEN];
664 user_data_t ud;
666 if ((host = calloc(1, sizeof (*host))) == NULL) {
667 ERROR ("write_riemann plugin: calloc failed.");
668 return ENOMEM;
669 }
670 pthread_mutex_init (&host->lock, NULL);
671 host->reference_count = 1;
672 host->node = NULL;
673 host->service = NULL;
674 host->store_rates = 1;
675 host->always_append_ds = 0;
676 host->use_tcp = 0;
677 host->ttl_factor = RIEMANN_TTL_FACTOR;
679 status = cf_util_get_string (ci, &host->name);
680 if (status != 0) {
681 WARNING("write_riemann plugin: Required host name is missing.");
682 riemann_free (host);
683 return -1;
684 }
686 for (i = 0; i < ci->children_num; i++) {
687 /*
688 * The code here could be simplified but makes room
689 * for easy adding of new options later on.
690 */
691 child = &ci->children[i];
692 status = 0;
694 if (strcasecmp ("Host", child->key) == 0) {
695 status = cf_util_get_string (child, &host->node);
696 if (status != 0)
697 break;
698 } else if (strcasecmp ("Port", child->key) == 0) {
699 status = cf_util_get_service (child, &host->service);
700 if (status != 0) {
701 ERROR ("write_riemann plugin: Invalid argument "
702 "configured for the \"Port\" "
703 "option.");
704 break;
705 }
706 } else if (strcasecmp ("Protocol", child->key) == 0) {
707 char tmp[16];
708 status = cf_util_get_string_buffer (child,
709 tmp, sizeof (tmp));
710 if (status != 0)
711 {
712 ERROR ("write_riemann plugin: cf_util_get_"
713 "string_buffer failed with "
714 "status %i.", status);
715 break;
716 }
718 if (strcasecmp ("UDP", tmp) == 0)
719 host->use_tcp = 0;
720 else if (strcasecmp ("TCP", tmp) == 0)
721 host->use_tcp = 1;
722 else
723 WARNING ("write_riemann plugin: The value "
724 "\"%s\" is not valid for the "
725 "\"Protocol\" option. Use "
726 "either \"UDP\" or \"TCP\".",
727 tmp);
728 } else if (strcasecmp ("StoreRates", child->key) == 0) {
729 status = cf_util_get_boolean (child, &host->store_rates);
730 if (status != 0)
731 break;
732 } else if (strcasecmp ("AlwaysAppendDS", child->key) == 0) {
733 status = cf_util_get_boolean (child,
734 &host->always_append_ds);
735 if (status != 0)
736 break;
737 } else if (strcasecmp ("TTLFactor", child->key) == 0) {
738 double tmp = NAN;
739 status = cf_util_get_double (child, &tmp);
740 if (status != 0)
741 break;
742 if (tmp >= 2.0) {
743 host->ttl_factor = tmp;
744 } else if (tmp >= 1.0) {
745 NOTICE ("write_riemann plugin: The configured "
746 "TTLFactor is very small "
747 "(%.1f). A value of 2.0 or "
748 "greater is recommended.",
749 tmp);
750 host->ttl_factor = tmp;
751 } else if (tmp > 0.0) {
752 WARNING ("write_riemann plugin: The configured "
753 "TTLFactor is too small to be "
754 "useful (%.1f). I'll use it "
755 "since the user knows best, "
756 "but under protest.",
757 tmp);
758 host->ttl_factor = tmp;
759 } else { /* zero, negative and NAN */
760 ERROR ("write_riemann plugin: The configured "
761 "TTLFactor is invalid (%.1f).",
762 tmp);
763 }
764 } else {
765 WARNING("write_riemann plugin: ignoring unknown config "
766 "option: \"%s\"", child->key);
767 }
768 }
769 if (status != 0) {
770 riemann_free (host);
771 return status;
772 }
774 ssnprintf (callback_name, sizeof (callback_name), "write_riemann/%s",
775 host->name);
776 ud.data = host;
777 ud.free_func = riemann_free;
779 pthread_mutex_lock (&host->lock);
781 status = plugin_register_write (callback_name, riemann_write, &ud);
782 if (status != 0)
783 WARNING ("write_riemann plugin: plugin_register_write (\"%s\") "
784 "failed with status %i.",
785 callback_name, status);
786 else /* success */
787 host->reference_count++;
789 status = plugin_register_notification (callback_name,
790 riemann_notification, &ud);
791 if (status != 0)
792 WARNING ("write_riemann plugin: plugin_register_notification (\"%s\") "
793 "failed with status %i.",
794 callback_name, status);
795 else /* success */
796 host->reference_count++;
798 if (host->reference_count <= 1)
799 {
800 /* Both callbacks failed => free memory.
801 * We need to unlock here, because riemann_free() will lock.
802 * This is not a race condition, because we're the only one
803 * holding a reference. */
804 pthread_mutex_unlock (&host->lock);
805 riemann_free (host);
806 return (-1);
807 }
809 host->reference_count--;
810 pthread_mutex_unlock (&host->lock);
812 return status;
813 } /* }}} int riemann_config_node */
815 static int riemann_config(oconfig_item_t *ci) /* {{{ */
816 {
817 int i;
818 oconfig_item_t *child;
819 int status;
821 for (i = 0; i < ci->children_num; i++) {
822 child = &ci->children[i];
824 if (strcasecmp("Node", child->key) == 0) {
825 riemann_config_node (child);
826 } else if (strcasecmp(child->key, "tag") == 0) {
827 char *tmp = NULL;
828 status = cf_util_get_string(child, &tmp);
829 if (status != 0)
830 continue;
832 strarray_add (&riemann_tags, &riemann_tags_num, tmp);
833 DEBUG("write_riemann plugin: Got tag: %s", tmp);
834 sfree (tmp);
835 } else {
836 WARNING ("write_riemann plugin: Ignoring unknown "
837 "configuration option \"%s\" at top level.",
838 child->key);
839 }
840 }
841 return (0);
842 } /* }}} int riemann_config */
844 void module_register(void)
845 {
846 plugin_register_complex_config ("write_riemann", riemann_config);
847 }
849 /* vim: set sw=8 sts=8 ts=8 noet : */