1 /**
2 * collectd - src/write_riemann.c
3 * Copyright (C) 2012,2013 Pierre-Yves Ritschard
4 * Copyright (C) 2013 Florian octo Forster
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Pierre-Yves Ritschard <pyr at spootnik.org>
26 * Florian octo Forster <octo at collectd.org>
27 */
29 #include "collectd.h"
31 #include "plugin.h"
32 #include "common.h"
33 #include "configfile.h"
34 #include "utils_cache.h"
35 #include "riemann.pb-c.h"
36 #include "write_riemann_threshold.h"
38 #include <sys/socket.h>
39 #include <arpa/inet.h>
40 #include <netdb.h>
42 #define RIEMANN_HOST "localhost"
43 #define RIEMANN_PORT "5555"
44 #define RIEMANN_TTL_FACTOR 2.0
45 #define RIEMANN_BATCH_MAX 8192
47 struct riemann_host {
48 char *name;
49 char *event_service_prefix;
50 #define F_CONNECT 0x01
51 uint8_t flags;
52 pthread_mutex_t lock;
53 _Bool batch_mode;
54 _Bool notifications;
55 _Bool check_thresholds;
56 _Bool store_rates;
57 _Bool always_append_ds;
58 char *node;
59 char *service;
60 _Bool use_tcp;
61 int s;
62 double ttl_factor;
63 Msg *batch_msg;
64 cdtime_t batch_init;
65 int batch_max;
66 int reference_count;
67 };
69 static char **riemann_tags;
70 static size_t riemann_tags_num;
71 static char **riemann_attrs;
72 static size_t riemann_attrs_num;
74 static void riemann_event_protobuf_free (Event *event) /* {{{ */
75 {
76 size_t i;
78 if (event == NULL)
79 return;
81 sfree (event->state);
82 sfree (event->service);
83 sfree (event->host);
84 sfree (event->description);
86 strarray_free (event->tags, event->n_tags);
87 event->tags = NULL;
88 event->n_tags = 0;
90 for (i = 0; i < event->n_attributes; i++)
91 {
92 sfree (event->attributes[i]->key);
93 sfree (event->attributes[i]->value);
94 sfree (event->attributes[i]);
95 }
96 sfree (event->attributes);
97 event->n_attributes = 0;
99 sfree (event);
100 } /* }}} void riemann_event_protobuf_free */
102 static void riemann_msg_protobuf_free(Msg *msg) /* {{{ */
103 {
104 size_t i;
106 if (msg == NULL)
107 return;
109 for (i = 0; i < msg->n_events; i++)
110 {
111 riemann_event_protobuf_free (msg->events[i]);
112 msg->events[i] = NULL;
113 }
115 sfree (msg->events);
116 msg->n_events = 0;
118 sfree (msg);
119 } /* }}} void riemann_msg_protobuf_free */
121 /* host->lock must be held when calling this function. */
122 static int riemann_connect(struct riemann_host *host) /* {{{ */
123 {
124 int e;
125 struct addrinfo *ai, *res, hints;
126 char const *node;
127 char const *service;
129 if (host->flags & F_CONNECT)
130 return 0;
132 memset(&hints, 0, sizeof(hints));
133 memset(&service, 0, sizeof(service));
134 hints.ai_family = AF_UNSPEC;
135 hints.ai_socktype = host->use_tcp ? SOCK_STREAM : SOCK_DGRAM;
136 #ifdef AI_ADDRCONFIG
137 hints.ai_flags |= AI_ADDRCONFIG;
138 #endif
140 node = (host->node != NULL) ? host->node : RIEMANN_HOST;
141 service = (host->service != NULL) ? host->service : RIEMANN_PORT;
143 if ((e = getaddrinfo(node, service, &hints, &res)) != 0) {
144 ERROR ("write_riemann plugin: Unable to resolve host \"%s\": %s",
145 node, gai_strerror(e));
146 return -1;
147 }
149 host->s = -1;
150 for (ai = res; ai != NULL; ai = ai->ai_next) {
151 if ((host->s = socket(ai->ai_family,
152 ai->ai_socktype,
153 ai->ai_protocol)) == -1) {
154 continue;
155 }
157 if (connect(host->s, ai->ai_addr, ai->ai_addrlen) != 0) {
158 close(host->s);
159 host->s = -1;
160 continue;
161 }
163 host->flags |= F_CONNECT;
164 DEBUG("write_riemann plugin: got a successful connection for: %s:%s",
165 node, service);
166 break;
167 }
169 freeaddrinfo(res);
171 if (host->s < 0) {
172 WARNING("write_riemann plugin: Unable to connect to Riemann at %s:%s",
173 node, service);
174 return -1;
175 }
176 return 0;
177 } /* }}} int riemann_connect */
179 /* host->lock must be held when calling this function. */
180 static int riemann_disconnect (struct riemann_host *host) /* {{{ */
181 {
182 if ((host->flags & F_CONNECT) == 0)
183 return (0);
185 close (host->s);
186 host->s = -1;
187 host->flags &= ~F_CONNECT;
189 return (0);
190 } /* }}} int riemann_disconnect */
192 static int riemann_send_msg (struct riemann_host *host, const Msg *msg) /* {{{ */
193 {
194 int status = 0;
195 u_char *buffer = NULL;
196 size_t buffer_len;
198 status = riemann_connect (host);
199 if (status != 0)
200 return status;
202 buffer_len = msg__get_packed_size(msg);
204 if (host->use_tcp)
205 buffer_len += 4;
207 buffer = malloc (buffer_len);
208 if (buffer == NULL) {
209 ERROR ("write_riemann plugin: malloc failed.");
210 return ENOMEM;
211 }
212 memset (buffer, 0, buffer_len);
214 if (host->use_tcp)
215 {
216 uint32_t length = htonl ((uint32_t) (buffer_len - 4));
217 memcpy (buffer, &length, 4);
218 msg__pack(msg, buffer + 4);
219 }
220 else
221 {
222 msg__pack(msg, buffer);
223 }
225 status = (int) swrite (host->s, buffer, buffer_len);
226 if (status != 0)
227 {
228 char errbuf[1024];
229 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s failed: %s",
230 (host->node != NULL) ? host->node : RIEMANN_HOST,
231 (host->service != NULL) ? host->service : RIEMANN_PORT,
232 sstrerror (errno, errbuf, sizeof (errbuf)));
233 sfree (buffer);
234 return -1;
235 }
237 sfree (buffer);
238 return 0;
239 } /* }}} int riemann_send_msg */
241 static int riemann_recv_ack(struct riemann_host *host) /* {{{ */
242 {
243 int status = 0;
244 Msg *msg = NULL;
245 uint32_t header;
247 status = (int) sread (host->s, &header, 4);
249 if (status != 0)
250 return -1;
252 size_t size = ntohl(header);
254 // Buffer on the stack since acknowledges are typically small.
255 u_char buffer[size];
256 memset (buffer, 0, size);
258 status = (int) sread (host->s, buffer, size);
260 if (status != 0)
261 return status;
263 msg = msg__unpack (NULL, size, buffer);
265 if (msg == NULL)
266 return -1;
268 if (!msg->ok)
269 {
270 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s acknowledgement message reported error: %s",
271 (host->node != NULL) ? host->node : RIEMANN_HOST,
272 (host->service != NULL) ? host->service : RIEMANN_PORT,
273 msg->error);
275 msg__free_unpacked(msg, NULL);
276 return -1;
277 }
279 msg__free_unpacked (msg, NULL);
280 return 0;
281 } /* }}} int riemann_recv_ack */
283 /**
284 * Function to send messages (Msg) to riemann.
285 *
286 * Acquires the host lock, disconnects on errors.
287 */
288 static int riemann_send(struct riemann_host *host, Msg const *msg) /* {{{ */
289 {
290 int status = 0;
291 pthread_mutex_lock (&host->lock);
293 status = riemann_send_msg(host, msg);
294 if (status != 0) {
295 riemann_disconnect (host);
296 pthread_mutex_unlock (&host->lock);
297 return status;
298 }
300 /*
301 * For TCP we need to receive message acknowledgemenent.
302 */
303 if (host->use_tcp)
304 {
305 status = riemann_recv_ack(host);
307 if (status != 0)
308 {
309 riemann_disconnect (host);
310 pthread_mutex_unlock (&host->lock);
311 return status;
312 }
313 }
315 pthread_mutex_unlock (&host->lock);
316 return 0;
317 } /* }}} int riemann_send */
319 static int riemann_event_add_tag (Event *event, char const *tag) /* {{{ */
320 {
321 return (strarray_add (&event->tags, &event->n_tags, tag));
322 } /* }}} int riemann_event_add_tag */
324 static int riemann_event_add_attribute(Event *event, /* {{{ */
325 char const *key, char const *value)
326 {
327 Attribute **new_attributes;
328 Attribute *a;
330 new_attributes = realloc (event->attributes,
331 sizeof (*event->attributes) * (event->n_attributes + 1));
332 if (new_attributes == NULL)
333 {
334 ERROR ("write_riemann plugin: realloc failed.");
335 return (ENOMEM);
336 }
337 event->attributes = new_attributes;
339 a = malloc (sizeof (*a));
340 if (a == NULL)
341 {
342 ERROR ("write_riemann plugin: malloc failed.");
343 return (ENOMEM);
344 }
345 attribute__init (a);
347 a->key = strdup (key);
348 if (value != NULL)
349 a->value = strdup (value);
351 event->attributes[event->n_attributes] = a;
352 event->n_attributes++;
354 return (0);
355 } /* }}} int riemann_event_add_attribute */
357 static Msg *riemann_notification_to_protobuf(struct riemann_host *host, /* {{{ */
358 notification_t const *n)
359 {
360 Msg *msg;
361 Event *event;
362 char service_buffer[6 * DATA_MAX_NAME_LEN];
363 char const *severity;
364 notification_meta_t *meta;
365 int i;
367 msg = malloc (sizeof (*msg));
368 if (msg == NULL)
369 {
370 ERROR ("write_riemann plugin: malloc failed.");
371 return (NULL);
372 }
373 memset (msg, 0, sizeof (*msg));
374 msg__init (msg);
376 msg->events = malloc (sizeof (*msg->events));
377 if (msg->events == NULL)
378 {
379 ERROR ("write_riemann plugin: malloc failed.");
380 sfree (msg);
381 return (NULL);
382 }
384 event = malloc (sizeof (*event));
385 if (event == NULL)
386 {
387 ERROR ("write_riemann plugin: malloc failed.");
388 sfree (msg->events);
389 sfree (msg);
390 return (NULL);
391 }
392 memset (event, 0, sizeof (*event));
393 event__init (event);
395 msg->events[0] = event;
396 msg->n_events = 1;
398 event->host = strdup (n->host);
399 event->time = CDTIME_T_TO_TIME_T (n->time);
400 event->has_time = 1;
402 switch (n->severity)
403 {
404 case NOTIF_OKAY: severity = "ok"; break;
405 case NOTIF_WARNING: severity = "warning"; break;
406 case NOTIF_FAILURE: severity = "critical"; break;
407 default: severity = "unknown";
408 }
409 event->state = strdup (severity);
411 riemann_event_add_tag (event, "notification");
412 if (n->host[0] != 0)
413 riemann_event_add_attribute (event, "host", n->host);
414 if (n->plugin[0] != 0)
415 riemann_event_add_attribute (event, "plugin", n->plugin);
416 if (n->plugin_instance[0] != 0)
417 riemann_event_add_attribute (event, "plugin_instance",
418 n->plugin_instance);
420 if (n->type[0] != 0)
421 riemann_event_add_attribute (event, "type", n->type);
422 if (n->type_instance[0] != 0)
423 riemann_event_add_attribute (event, "type_instance",
424 n->type_instance);
426 for (i = 0; i < riemann_attrs_num; i += 2)
427 riemann_event_add_attribute(event,
428 riemann_attrs[i],
429 riemann_attrs[i +1]);
431 for (i = 0; i < riemann_tags_num; i++)
432 riemann_event_add_tag (event, riemann_tags[i]);
434 format_name (service_buffer, sizeof (service_buffer),
435 /* host = */ "", n->plugin, n->plugin_instance,
436 n->type, n->type_instance);
437 event->service = strdup (&service_buffer[1]);
439 if (n->message[0] != 0)
440 riemann_event_add_attribute (event, "description", n->message);
442 /* Pull in values from threshold and add extra attributes */
443 for (meta = n->meta; meta != NULL; meta = meta->next)
444 {
445 if (strcasecmp ("CurrentValue", meta->name) == 0 && meta->type == NM_TYPE_DOUBLE)
446 {
447 event->metric_d = meta->nm_value.nm_double;
448 event->has_metric_d = 1;
449 continue;
450 }
452 if (meta->type == NM_TYPE_STRING) {
453 riemann_event_add_attribute (event, meta->name, meta->nm_value.nm_string);
454 continue;
455 }
456 }
458 DEBUG ("write_riemann plugin: Successfully created protobuf for notification: "
459 "host = \"%s\", service = \"%s\", state = \"%s\"",
460 event->host, event->service, event->state);
461 return (msg);
462 } /* }}} Msg *riemann_notification_to_protobuf */
464 static Event *riemann_value_to_protobuf(struct riemann_host const *host, /* {{{ */
465 data_set_t const *ds,
466 value_list_t const *vl, size_t index,
467 gauge_t const *rates,
468 int status)
469 {
470 Event *event;
471 char name_buffer[5 * DATA_MAX_NAME_LEN];
472 char service_buffer[6 * DATA_MAX_NAME_LEN];
473 double ttl;
474 int i;
476 event = malloc (sizeof (*event));
477 if (event == NULL)
478 {
479 ERROR ("write_riemann plugin: malloc failed.");
480 return (NULL);
481 }
482 memset (event, 0, sizeof (*event));
483 event__init (event);
485 event->host = strdup (vl->host);
486 event->time = CDTIME_T_TO_TIME_T (vl->time);
487 event->has_time = 1;
489 if (host->check_thresholds) {
490 switch (status) {
491 case STATE_OKAY:
492 event->state = strdup("ok");
493 break;
494 case STATE_ERROR:
495 event->state = strdup("critical");
496 break;
497 case STATE_WARNING:
498 event->state = strdup("warning");
499 break;
500 case STATE_MISSING:
501 event->state = strdup("unknown");
502 break;
503 }
504 }
506 ttl = CDTIME_T_TO_DOUBLE (vl->interval) * host->ttl_factor;
507 event->ttl = (float) ttl;
508 event->has_ttl = 1;
510 riemann_event_add_attribute (event, "plugin", vl->plugin);
511 if (vl->plugin_instance[0] != 0)
512 riemann_event_add_attribute (event, "plugin_instance",
513 vl->plugin_instance);
515 riemann_event_add_attribute (event, "type", vl->type);
516 if (vl->type_instance[0] != 0)
517 riemann_event_add_attribute (event, "type_instance",
518 vl->type_instance);
520 if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL))
521 {
522 char ds_type[DATA_MAX_NAME_LEN];
524 ssnprintf (ds_type, sizeof (ds_type), "%s:rate",
525 DS_TYPE_TO_STRING(ds->ds[index].type));
526 riemann_event_add_attribute (event, "ds_type", ds_type);
527 }
528 else
529 {
530 riemann_event_add_attribute (event, "ds_type",
531 DS_TYPE_TO_STRING(ds->ds[index].type));
532 }
533 riemann_event_add_attribute (event, "ds_name", ds->ds[index].name);
534 {
535 char ds_index[DATA_MAX_NAME_LEN];
537 ssnprintf (ds_index, sizeof (ds_index), "%zu", index);
538 riemann_event_add_attribute (event, "ds_index", ds_index);
539 }
541 for (i = 0; i < riemann_attrs_num; i += 2)
542 riemann_event_add_attribute(event,
543 riemann_attrs[i],
544 riemann_attrs[i +1]);
546 for (i = 0; i < riemann_tags_num; i++)
547 riemann_event_add_tag (event, riemann_tags[i]);
549 if (ds->ds[index].type == DS_TYPE_GAUGE)
550 {
551 event->has_metric_d = 1;
552 event->metric_d = (double) vl->values[index].gauge;
553 }
554 else if (rates != NULL)
555 {
556 event->has_metric_d = 1;
557 event->metric_d = (double) rates[index];
558 }
559 else
560 {
561 event->has_metric_sint64 = 1;
562 if (ds->ds[index].type == DS_TYPE_DERIVE)
563 event->metric_sint64 = (int64_t) vl->values[index].derive;
564 else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
565 event->metric_sint64 = (int64_t) vl->values[index].absolute;
566 else
567 event->metric_sint64 = (int64_t) vl->values[index].counter;
568 }
570 format_name (name_buffer, sizeof (name_buffer),
571 /* host = */ "", vl->plugin, vl->plugin_instance,
572 vl->type, vl->type_instance);
573 if (host->always_append_ds || (ds->ds_num > 1))
574 {
575 if (host->event_service_prefix == NULL)
576 ssnprintf (service_buffer, sizeof (service_buffer), "%s/%s",
577 &name_buffer[1], ds->ds[index].name);
578 else
579 ssnprintf (service_buffer, sizeof (service_buffer), "%s%s/%s",
580 host->event_service_prefix, &name_buffer[1], ds->ds[index].name);
581 }
582 else
583 {
584 if (host->event_service_prefix == NULL)
585 sstrncpy (service_buffer, &name_buffer[1], sizeof (service_buffer));
586 else
587 ssnprintf (service_buffer, sizeof (service_buffer), "%s%s",
588 host->event_service_prefix, &name_buffer[1]);
589 }
591 event->service = strdup (service_buffer);
593 DEBUG ("write_riemann plugin: Successfully created protobuf for metric: "
594 "host = \"%s\", service = \"%s\"",
595 event->host, event->service);
596 return (event);
597 } /* }}} Event *riemann_value_to_protobuf */
599 static Msg *riemann_value_list_to_protobuf (struct riemann_host const *host, /* {{{ */
600 data_set_t const *ds,
601 value_list_t const *vl,
602 int *statuses)
603 {
604 Msg *msg;
605 size_t i;
606 gauge_t *rates = NULL;
608 /* Initialize the Msg structure. */
609 msg = malloc (sizeof (*msg));
610 if (msg == NULL)
611 {
612 ERROR ("write_riemann plugin: malloc failed.");
613 return (NULL);
614 }
615 memset (msg, 0, sizeof (*msg));
616 msg__init (msg);
618 /* Set up events. First, the list of pointers. */
619 msg->n_events = (size_t) vl->values_len;
620 msg->events = calloc (msg->n_events, sizeof (*msg->events));
621 if (msg->events == NULL)
622 {
623 ERROR ("write_riemann plugin: calloc failed.");
624 riemann_msg_protobuf_free (msg);
625 return (NULL);
626 }
628 if (host->store_rates)
629 {
630 rates = uc_get_rate (ds, vl);
631 if (rates == NULL)
632 {
633 ERROR ("write_riemann plugin: uc_get_rate failed.");
634 riemann_msg_protobuf_free (msg);
635 return (NULL);
636 }
637 }
639 for (i = 0; i < msg->n_events; i++)
640 {
641 msg->events[i] = riemann_value_to_protobuf (host, ds, vl,
642 (int) i, rates, statuses[i]);
643 if (msg->events[i] == NULL)
644 {
645 riemann_msg_protobuf_free (msg);
646 sfree (rates);
647 return (NULL);
648 }
649 }
651 sfree (rates);
652 return (msg);
653 } /* }}} Msg *riemann_value_list_to_protobuf */
656 /*
657 * Always call while holding host->lock !
658 */
659 static int riemann_batch_flush_nolock (cdtime_t timeout,
660 struct riemann_host *host)
661 {
662 cdtime_t now;
663 int status = 0;
665 if (timeout > 0) {
666 now = cdtime ();
667 if ((host->batch_init + timeout) > now)
668 return status;
669 }
670 riemann_send_msg(host, host->batch_msg);
671 riemann_msg_protobuf_free(host->batch_msg);
673 if (host->use_tcp && ((status = riemann_recv_ack(host)) != 0))
674 riemann_disconnect (host);
676 host->batch_init = cdtime();
677 host->batch_msg = NULL;
678 return status;
679 }
681 static int riemann_batch_flush (cdtime_t timeout,
682 const char *identifier __attribute__((unused)),
683 user_data_t *user_data)
684 {
685 struct riemann_host *host;
686 int status;
688 if (user_data == NULL)
689 return (-EINVAL);
691 host = user_data->data;
692 pthread_mutex_lock (&host->lock);
693 status = riemann_batch_flush_nolock (timeout, host);
694 if (status != 0)
695 ERROR ("write_riemann plugin: riemann_send failed with status %i",
696 status);
698 pthread_mutex_unlock(&host->lock);
699 return status;
700 }
702 static int riemann_batch_add_value_list (struct riemann_host *host, /* {{{ */
703 data_set_t const *ds,
704 value_list_t const *vl,
705 int *statuses)
706 {
707 size_t i;
708 Event **events;
709 Msg *msg;
710 size_t len;
711 int ret;
713 msg = riemann_value_list_to_protobuf (host, ds, vl, statuses);
714 if (msg == NULL)
715 return -1;
717 pthread_mutex_lock(&host->lock);
719 if (host->batch_msg == NULL) {
720 host->batch_msg = msg;
721 } else {
722 len = msg->n_events + host->batch_msg->n_events;
723 events = realloc(host->batch_msg->events,
724 (len * sizeof(*host->batch_msg->events)));
725 if (events == NULL) {
726 pthread_mutex_unlock(&host->lock);
727 ERROR ("write_riemann plugin: out of memory");
728 riemann_msg_protobuf_free (msg);
729 return -1;
730 }
731 host->batch_msg->events = events;
733 for (i = host->batch_msg->n_events; i < len; i++)
734 host->batch_msg->events[i] = msg->events[i - host->batch_msg->n_events];
736 host->batch_msg->n_events = len;
737 sfree (msg->events);
738 msg->n_events = 0;
739 sfree (msg);
740 }
742 len = msg__get_packed_size(host->batch_msg);
743 ret = 0;
744 if (len >= host->batch_max) {
745 ret = riemann_batch_flush_nolock(0, host);
746 }
748 pthread_mutex_unlock(&host->lock);
749 return ret;
750 } /* }}} Msg *riemann_batch_add_value_list */
752 static int riemann_notification(const notification_t *n, user_data_t *ud) /* {{{ */
753 {
754 int status;
755 struct riemann_host *host = ud->data;
756 Msg *msg;
758 if (!host->notifications)
759 return 0;
761 /*
762 * Never batch for notifications, send them ASAP
763 */
764 msg = riemann_notification_to_protobuf (host, n);
765 if (msg == NULL)
766 return (-1);
768 status = riemann_send (host, msg);
769 if (status != 0)
770 ERROR ("write_riemann plugin: riemann_send failed with status %i",
771 status);
773 riemann_msg_protobuf_free (msg);
774 return (status);
775 } /* }}} int riemann_notification */
777 static int riemann_write(const data_set_t *ds, /* {{{ */
778 const value_list_t *vl,
779 user_data_t *ud)
780 {
781 int status = 0;
782 int statuses[vl->values_len];
783 struct riemann_host *host = ud->data;
784 Msg *msg;
786 if (host->check_thresholds)
787 write_riemann_threshold_check(ds, vl, statuses);
789 if (host->use_tcp == 1 && host->batch_mode) {
791 riemann_batch_add_value_list (host, ds, vl, statuses);
794 } else {
796 msg = riemann_value_list_to_protobuf (host, ds, vl, statuses);
797 if (msg == NULL)
798 return (-1);
800 status = riemann_send (host, msg);
801 if (status != 0)
802 ERROR ("write_riemann plugin: riemann_send failed with status %i",
803 status);
805 riemann_msg_protobuf_free (msg);
806 }
807 return status;
808 } /* }}} int riemann_write */
810 static void riemann_free(void *p) /* {{{ */
811 {
812 struct riemann_host *host = p;
814 if (host == NULL)
815 return;
817 pthread_mutex_lock (&host->lock);
819 host->reference_count--;
820 if (host->reference_count > 0)
821 {
822 pthread_mutex_unlock (&host->lock);
823 return;
824 }
826 riemann_disconnect (host);
828 sfree(host->service);
829 pthread_mutex_destroy (&host->lock);
830 sfree(host);
831 } /* }}} void riemann_free */
833 static int riemann_config_node(oconfig_item_t *ci) /* {{{ */
834 {
835 struct riemann_host *host = NULL;
836 int status = 0;
837 int i;
838 oconfig_item_t *child;
839 char callback_name[DATA_MAX_NAME_LEN];
840 user_data_t ud;
842 if ((host = calloc(1, sizeof (*host))) == NULL) {
843 ERROR ("write_riemann plugin: calloc failed.");
844 return ENOMEM;
845 }
846 pthread_mutex_init (&host->lock, NULL);
847 host->reference_count = 1;
848 host->node = NULL;
849 host->service = NULL;
850 host->notifications = 1;
851 host->check_thresholds = 0;
852 host->store_rates = 1;
853 host->always_append_ds = 0;
854 host->use_tcp = 1;
855 host->batch_mode = 1;
856 host->batch_max = RIEMANN_BATCH_MAX; /* typical MSS */
857 host->batch_init = cdtime();
858 host->ttl_factor = RIEMANN_TTL_FACTOR;
860 status = cf_util_get_string (ci, &host->name);
861 if (status != 0) {
862 WARNING("write_riemann plugin: Required host name is missing.");
863 riemann_free (host);
864 return -1;
865 }
867 for (i = 0; i < ci->children_num; i++) {
868 /*
869 * The code here could be simplified but makes room
870 * for easy adding of new options later on.
871 */
872 child = &ci->children[i];
873 status = 0;
875 if (strcasecmp ("Host", child->key) == 0) {
876 status = cf_util_get_string (child, &host->node);
877 if (status != 0)
878 break;
879 } else if (strcasecmp ("Notifications", child->key) == 0) {
880 status = cf_util_get_boolean(child, &host->notifications);
881 if (status != 0)
882 break;
883 } else if (strcasecmp ("EventServicePrefix", child->key) == 0) {
884 status = cf_util_get_string (child, &host->event_service_prefix);
885 if (status != 0)
886 break;
887 } else if (strcasecmp ("CheckThresholds", child->key) == 0) {
888 status = cf_util_get_boolean(child, &host->check_thresholds);
889 if (status != 0)
890 break;
891 } else if (strcasecmp ("Batch", child->key) == 0) {
892 status = cf_util_get_boolean(child, &host->batch_mode);
893 if (status != 0)
894 break;
895 } else if (strcasecmp("BatchMaxSize", child->key) == 0) {
896 status = cf_util_get_int(child, &host->batch_max);
897 if (status != 0)
898 break;
899 } else if (strcasecmp ("Port", child->key) == 0) {
900 status = cf_util_get_service (child, &host->service);
901 if (status != 0) {
902 ERROR ("write_riemann plugin: Invalid argument "
903 "configured for the \"Port\" "
904 "option.");
905 break;
906 }
907 } else if (strcasecmp ("Protocol", child->key) == 0) {
908 char tmp[16];
909 status = cf_util_get_string_buffer (child,
910 tmp, sizeof (tmp));
911 if (status != 0)
912 {
913 ERROR ("write_riemann plugin: cf_util_get_"
914 "string_buffer failed with "
915 "status %i.", status);
916 break;
917 }
919 if (strcasecmp ("UDP", tmp) == 0)
920 host->use_tcp = 0;
921 else if (strcasecmp ("TCP", tmp) == 0)
922 host->use_tcp = 1;
923 else
924 WARNING ("write_riemann plugin: The value "
925 "\"%s\" is not valid for the "
926 "\"Protocol\" option. Use "
927 "either \"UDP\" or \"TCP\".",
928 tmp);
929 } else if (strcasecmp ("StoreRates", child->key) == 0) {
930 status = cf_util_get_boolean (child, &host->store_rates);
931 if (status != 0)
932 break;
933 } else if (strcasecmp ("AlwaysAppendDS", child->key) == 0) {
934 status = cf_util_get_boolean (child,
935 &host->always_append_ds);
936 if (status != 0)
937 break;
938 } else if (strcasecmp ("TTLFactor", child->key) == 0) {
939 double tmp = NAN;
940 status = cf_util_get_double (child, &tmp);
941 if (status != 0)
942 break;
943 if (tmp >= 2.0) {
944 host->ttl_factor = tmp;
945 } else if (tmp >= 1.0) {
946 NOTICE ("write_riemann plugin: The configured "
947 "TTLFactor is very small "
948 "(%.1f). A value of 2.0 or "
949 "greater is recommended.",
950 tmp);
951 host->ttl_factor = tmp;
952 } else if (tmp > 0.0) {
953 WARNING ("write_riemann plugin: The configured "
954 "TTLFactor is too small to be "
955 "useful (%.1f). I'll use it "
956 "since the user knows best, "
957 "but under protest.",
958 tmp);
959 host->ttl_factor = tmp;
960 } else { /* zero, negative and NAN */
961 ERROR ("write_riemann plugin: The configured "
962 "TTLFactor is invalid (%.1f).",
963 tmp);
964 }
965 } else {
966 WARNING("write_riemann plugin: ignoring unknown config "
967 "option: \"%s\"", child->key);
968 }
969 }
970 if (status != 0) {
971 riemann_free (host);
972 return status;
973 }
975 ssnprintf (callback_name, sizeof (callback_name), "write_riemann/%s",
976 host->name);
977 ud.data = host;
978 ud.free_func = riemann_free;
980 pthread_mutex_lock (&host->lock);
982 status = plugin_register_write (callback_name, riemann_write, &ud);
984 if (host->use_tcp == 1 && host->batch_mode) {
985 ud.free_func = NULL;
986 plugin_register_flush(callback_name, riemann_batch_flush, &ud);
987 }
988 if (status != 0)
989 WARNING ("write_riemann plugin: plugin_register_write (\"%s\") "
990 "failed with status %i.",
991 callback_name, status);
992 else /* success */
993 host->reference_count++;
995 status = plugin_register_notification (callback_name,
996 riemann_notification, &ud);
997 if (status != 0)
998 WARNING ("write_riemann plugin: plugin_register_notification (\"%s\") "
999 "failed with status %i.",
1000 callback_name, status);
1001 else /* success */
1002 host->reference_count++;
1004 if (host->reference_count <= 1)
1005 {
1006 /* Both callbacks failed => free memory.
1007 * We need to unlock here, because riemann_free() will lock.
1008 * This is not a race condition, because we're the only one
1009 * holding a reference. */
1010 pthread_mutex_unlock (&host->lock);
1011 riemann_free (host);
1012 return (-1);
1013 }
1015 host->reference_count--;
1016 pthread_mutex_unlock (&host->lock);
1018 return status;
1019 } /* }}} int riemann_config_node */
1021 static int riemann_config(oconfig_item_t *ci) /* {{{ */
1022 {
1023 int i;
1024 oconfig_item_t *child;
1025 int status;
1027 for (i = 0; i < ci->children_num; i++) {
1028 child = &ci->children[i];
1030 if (strcasecmp("Node", child->key) == 0) {
1031 riemann_config_node (child);
1032 } else if (strcasecmp(child->key, "attribute") == 0) {
1033 char *key = NULL;
1034 char *val = NULL;
1036 if (child->values_num != 2) {
1037 WARNING("riemann attributes need both a key and a value.");
1038 return (-1);
1039 }
1040 if (child->values[0].type != OCONFIG_TYPE_STRING ||
1041 child->values[1].type != OCONFIG_TYPE_STRING) {
1042 WARNING("riemann attribute needs string arguments.");
1043 return (-1);
1044 }
1045 if ((key = strdup(child->values[0].value.string)) == NULL) {
1046 WARNING("cannot allocate memory for attribute key.");
1047 return (-1);
1048 }
1049 if ((val = strdup(child->values[1].value.string)) == NULL) {
1050 WARNING("cannot allocate memory for attribute value.");
1051 sfree (key);
1052 return (-1);
1053 }
1054 strarray_add(&riemann_attrs, &riemann_attrs_num, key);
1055 strarray_add(&riemann_attrs, &riemann_attrs_num, val);
1056 DEBUG("write_riemann: got attr: %s => %s", key, val);
1057 sfree(key);
1058 sfree(val);
1059 } else if (strcasecmp(child->key, "tag") == 0) {
1060 char *tmp = NULL;
1061 status = cf_util_get_string(child, &tmp);
1062 if (status != 0)
1063 continue;
1065 strarray_add (&riemann_tags, &riemann_tags_num, tmp);
1066 DEBUG("write_riemann plugin: Got tag: %s", tmp);
1067 sfree (tmp);
1068 } else {
1069 WARNING ("write_riemann plugin: Ignoring unknown "
1070 "configuration option \"%s\" at top level.",
1071 child->key);
1072 }
1073 }
1074 return (0);
1075 } /* }}} int riemann_config */
1077 void module_register(void)
1078 {
1079 plugin_register_complex_config ("write_riemann", riemann_config);
1080 }
1082 /* vim: set sw=8 sts=8 ts=8 noet : */