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"
30 #include "plugin.h"
31 #include "common.h"
32 #include "configfile.h"
33 #include "utils_cache.h"
34 #include "riemann.pb-c.h"
36 #include <arpa/inet.h>
37 #include <errno.h>
38 #include <netdb.h>
39 #include <inttypes.h>
40 #include <pthread.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 int write_riemann_threshold_check(const data_set_t *, const value_list_t *, int *);
49 struct riemann_host {
50 char *name;
51 char *event_service_prefix;
52 #define F_CONNECT 0x01
53 uint8_t flags;
54 pthread_mutex_t lock;
55 _Bool batch_mode;
56 _Bool notifications;
57 _Bool check_thresholds;
58 _Bool store_rates;
59 _Bool always_append_ds;
60 char *node;
61 char *service;
62 _Bool use_tcp;
63 int s;
64 double ttl_factor;
65 Msg *batch_msg;
66 cdtime_t batch_init;
67 int batch_max;
68 int reference_count;
69 };
71 static char **riemann_tags;
72 static size_t riemann_tags_num;
73 static char **riemann_attrs;
74 static size_t riemann_attrs_num;
76 static void riemann_event_protobuf_free (Event *event) /* {{{ */
77 {
78 size_t i;
80 if (event == NULL)
81 return;
83 sfree (event->state);
84 sfree (event->service);
85 sfree (event->host);
86 sfree (event->description);
88 strarray_free (event->tags, event->n_tags);
89 event->tags = NULL;
90 event->n_tags = 0;
92 for (i = 0; i < event->n_attributes; i++)
93 {
94 sfree (event->attributes[i]->key);
95 sfree (event->attributes[i]->value);
96 sfree (event->attributes[i]);
97 }
98 sfree (event->attributes);
99 event->n_attributes = 0;
101 sfree (event);
102 } /* }}} void riemann_event_protobuf_free */
104 static void riemann_msg_protobuf_free(Msg *msg) /* {{{ */
105 {
106 size_t i;
108 if (msg == NULL)
109 return;
111 for (i = 0; i < msg->n_events; i++)
112 {
113 riemann_event_protobuf_free (msg->events[i]);
114 msg->events[i] = NULL;
115 }
117 sfree (msg->events);
118 msg->n_events = 0;
120 sfree (msg);
121 } /* }}} void riemann_msg_protobuf_free */
123 /* host->lock must be held when calling this function. */
124 static int riemann_connect(struct riemann_host *host) /* {{{ */
125 {
126 int e;
127 struct addrinfo *ai, *res, hints;
128 char const *node;
129 char const *service;
131 if (host->flags & F_CONNECT)
132 return 0;
134 memset(&hints, 0, sizeof(hints));
135 memset(&service, 0, sizeof(service));
136 hints.ai_family = AF_UNSPEC;
137 hints.ai_socktype = host->use_tcp ? SOCK_STREAM : SOCK_DGRAM;
138 #ifdef AI_ADDRCONFIG
139 hints.ai_flags |= AI_ADDRCONFIG;
140 #endif
142 node = (host->node != NULL) ? host->node : RIEMANN_HOST;
143 service = (host->service != NULL) ? host->service : RIEMANN_PORT;
145 if ((e = getaddrinfo(node, service, &hints, &res)) != 0) {
146 ERROR ("write_riemann plugin: Unable to resolve host \"%s\": %s",
147 node, gai_strerror(e));
148 return -1;
149 }
151 host->s = -1;
152 for (ai = res; ai != NULL; ai = ai->ai_next) {
153 if ((host->s = socket(ai->ai_family,
154 ai->ai_socktype,
155 ai->ai_protocol)) == -1) {
156 continue;
157 }
159 if (connect(host->s, ai->ai_addr, ai->ai_addrlen) != 0) {
160 close(host->s);
161 host->s = -1;
162 continue;
163 }
165 host->flags |= F_CONNECT;
166 DEBUG("write_riemann plugin: got a successful connection for: %s:%s",
167 node, service);
168 break;
169 }
171 freeaddrinfo(res);
173 if (host->s < 0) {
174 WARNING("write_riemann plugin: Unable to connect to Riemann at %s:%s",
175 node, service);
176 return -1;
177 }
178 return 0;
179 } /* }}} int riemann_connect */
181 /* host->lock must be held when calling this function. */
182 static int riemann_disconnect (struct riemann_host *host) /* {{{ */
183 {
184 if ((host->flags & F_CONNECT) == 0)
185 return (0);
187 close (host->s);
188 host->s = -1;
189 host->flags &= ~F_CONNECT;
191 return (0);
192 } /* }}} int riemann_disconnect */
194 static int riemann_send_msg (struct riemann_host *host, const Msg *msg) /* {{{ */
195 {
196 int status = 0;
197 u_char *buffer = NULL;
198 size_t buffer_len;
200 status = riemann_connect (host);
201 if (status != 0)
202 return status;
204 buffer_len = msg__get_packed_size(msg);
206 if (host->use_tcp)
207 buffer_len += 4;
209 buffer = malloc (buffer_len);
210 if (buffer == NULL) {
211 ERROR ("write_riemann plugin: malloc failed.");
212 return ENOMEM;
213 }
214 memset (buffer, 0, buffer_len);
216 if (host->use_tcp)
217 {
218 uint32_t length = htonl ((uint32_t) (buffer_len - 4));
219 memcpy (buffer, &length, 4);
220 msg__pack(msg, buffer + 4);
221 }
222 else
223 {
224 msg__pack(msg, buffer);
225 }
227 status = (int) swrite (host->s, buffer, buffer_len);
228 if (status != 0)
229 {
230 char errbuf[1024];
231 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s failed: %s",
232 (host->node != NULL) ? host->node : RIEMANN_HOST,
233 (host->service != NULL) ? host->service : RIEMANN_PORT,
234 sstrerror (errno, errbuf, sizeof (errbuf)));
235 sfree (buffer);
236 return -1;
237 }
239 sfree (buffer);
240 return 0;
241 } /* }}} int riemann_send_msg */
243 static int riemann_recv_ack(struct riemann_host *host) /* {{{ */
244 {
245 int status = 0;
246 Msg *msg = NULL;
247 uint32_t header;
249 status = (int) sread (host->s, &header, 4);
251 if (status != 0)
252 return -1;
254 size_t size = ntohl(header);
256 // Buffer on the stack since acknowledges are typically small.
257 u_char buffer[size];
258 memset (buffer, 0, size);
260 status = (int) sread (host->s, buffer, size);
262 if (status != 0)
263 return status;
265 msg = msg__unpack (NULL, size, buffer);
267 if (msg == NULL)
268 return -1;
270 if (!msg->ok)
271 {
272 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s acknowledgement message reported error: %s",
273 (host->node != NULL) ? host->node : RIEMANN_HOST,
274 (host->service != NULL) ? host->service : RIEMANN_PORT,
275 msg->error);
277 msg__free_unpacked(msg, NULL);
278 return -1;
279 }
281 msg__free_unpacked (msg, NULL);
282 return 0;
283 } /* }}} int riemann_recv_ack */
285 /**
286 * Function to send messages (Msg) to riemann.
287 *
288 * Acquires the host lock, disconnects on errors.
289 */
290 static int riemann_send(struct riemann_host *host, Msg const *msg) /* {{{ */
291 {
292 int status = 0;
293 pthread_mutex_lock (&host->lock);
295 status = riemann_send_msg(host, msg);
296 if (status != 0) {
297 riemann_disconnect (host);
298 pthread_mutex_unlock (&host->lock);
299 return status;
300 }
302 /*
303 * For TCP we need to receive message acknowledgemenent.
304 */
305 if (host->use_tcp)
306 {
307 status = riemann_recv_ack(host);
309 if (status != 0)
310 {
311 riemann_disconnect (host);
312 pthread_mutex_unlock (&host->lock);
313 return status;
314 }
315 }
317 pthread_mutex_unlock (&host->lock);
318 return 0;
319 } /* }}} int riemann_send */
321 static int riemann_event_add_tag (Event *event, char const *tag) /* {{{ */
322 {
323 return (strarray_add (&event->tags, &event->n_tags, tag));
324 } /* }}} int riemann_event_add_tag */
326 static int riemann_event_add_attribute(Event *event, /* {{{ */
327 char const *key, char const *value)
328 {
329 Attribute **new_attributes;
330 Attribute *a;
332 new_attributes = realloc (event->attributes,
333 sizeof (*event->attributes) * (event->n_attributes + 1));
334 if (new_attributes == NULL)
335 {
336 ERROR ("write_riemann plugin: realloc failed.");
337 return (ENOMEM);
338 }
339 event->attributes = new_attributes;
341 a = malloc (sizeof (*a));
342 if (a == NULL)
343 {
344 ERROR ("write_riemann plugin: malloc failed.");
345 return (ENOMEM);
346 }
347 attribute__init (a);
349 a->key = strdup (key);
350 if (value != NULL)
351 a->value = strdup (value);
353 event->attributes[event->n_attributes] = a;
354 event->n_attributes++;
356 return (0);
357 } /* }}} int riemann_event_add_attribute */
359 static Msg *riemann_notification_to_protobuf(struct riemann_host *host, /* {{{ */
360 notification_t const *n)
361 {
362 Msg *msg;
363 Event *event;
364 char service_buffer[6 * DATA_MAX_NAME_LEN];
365 char const *severity;
366 notification_meta_t *meta;
367 size_t i;
369 msg = malloc (sizeof (*msg));
370 if (msg == NULL)
371 {
372 ERROR ("write_riemann plugin: malloc failed.");
373 return (NULL);
374 }
375 memset (msg, 0, sizeof (*msg));
376 msg__init (msg);
378 msg->events = malloc (sizeof (*msg->events));
379 if (msg->events == NULL)
380 {
381 ERROR ("write_riemann plugin: malloc failed.");
382 sfree (msg);
383 return (NULL);
384 }
386 event = malloc (sizeof (*event));
387 if (event == NULL)
388 {
389 ERROR ("write_riemann plugin: malloc failed.");
390 sfree (msg->events);
391 sfree (msg);
392 return (NULL);
393 }
394 memset (event, 0, sizeof (*event));
395 event__init (event);
397 msg->events[0] = event;
398 msg->n_events = 1;
400 event->host = strdup (n->host);
401 event->time = CDTIME_T_TO_TIME_T (n->time);
402 event->has_time = 1;
404 switch (n->severity)
405 {
406 case NOTIF_OKAY: severity = "ok"; break;
407 case NOTIF_WARNING: severity = "warning"; break;
408 case NOTIF_FAILURE: severity = "critical"; break;
409 default: severity = "unknown";
410 }
411 event->state = strdup (severity);
413 riemann_event_add_tag (event, "notification");
414 if (n->host[0] != 0)
415 riemann_event_add_attribute (event, "host", n->host);
416 if (n->plugin[0] != 0)
417 riemann_event_add_attribute (event, "plugin", n->plugin);
418 if (n->plugin_instance[0] != 0)
419 riemann_event_add_attribute (event, "plugin_instance",
420 n->plugin_instance);
422 if (n->type[0] != 0)
423 riemann_event_add_attribute (event, "type", n->type);
424 if (n->type_instance[0] != 0)
425 riemann_event_add_attribute (event, "type_instance",
426 n->type_instance);
428 for (i = 0; i < riemann_attrs_num; i += 2)
429 riemann_event_add_attribute(event,
430 riemann_attrs[i],
431 riemann_attrs[i +1]);
433 for (i = 0; i < riemann_tags_num; i++)
434 riemann_event_add_tag (event, riemann_tags[i]);
436 format_name (service_buffer, sizeof (service_buffer),
437 /* host = */ "", n->plugin, n->plugin_instance,
438 n->type, n->type_instance);
439 event->service = strdup (&service_buffer[1]);
441 if (n->message[0] != 0)
442 riemann_event_add_attribute (event, "description", n->message);
444 /* Pull in values from threshold and add extra attributes */
445 for (meta = n->meta; meta != NULL; meta = meta->next)
446 {
447 if (strcasecmp ("CurrentValue", meta->name) == 0 && meta->type == NM_TYPE_DOUBLE)
448 {
449 event->metric_d = meta->nm_value.nm_double;
450 event->has_metric_d = 1;
451 continue;
452 }
454 if (meta->type == NM_TYPE_STRING) {
455 riemann_event_add_attribute (event, meta->name, meta->nm_value.nm_string);
456 continue;
457 }
458 }
460 DEBUG ("write_riemann plugin: Successfully created protobuf for notification: "
461 "host = \"%s\", service = \"%s\", state = \"%s\"",
462 event->host, event->service, event->state);
463 return (msg);
464 } /* }}} Msg *riemann_notification_to_protobuf */
466 static Event *riemann_value_to_protobuf(struct riemann_host const *host, /* {{{ */
467 data_set_t const *ds,
468 value_list_t const *vl, size_t index,
469 gauge_t const *rates,
470 int status)
471 {
472 Event *event;
473 char name_buffer[5 * DATA_MAX_NAME_LEN];
474 char service_buffer[6 * DATA_MAX_NAME_LEN];
475 double ttl;
476 size_t i;
478 event = malloc (sizeof (*event));
479 if (event == NULL)
480 {
481 ERROR ("write_riemann plugin: malloc failed.");
482 return (NULL);
483 }
484 memset (event, 0, sizeof (*event));
485 event__init (event);
487 event->host = strdup (vl->host);
488 event->time = CDTIME_T_TO_TIME_T (vl->time);
489 event->has_time = 1;
491 if (host->check_thresholds) {
492 switch (status) {
493 case STATE_OKAY:
494 event->state = strdup("ok");
495 break;
496 case STATE_ERROR:
497 event->state = strdup("critical");
498 break;
499 case STATE_WARNING:
500 event->state = strdup("warning");
501 break;
502 case STATE_MISSING:
503 event->state = strdup("unknown");
504 break;
505 }
506 }
508 ttl = CDTIME_T_TO_DOUBLE (vl->interval) * host->ttl_factor;
509 event->ttl = (float) ttl;
510 event->has_ttl = 1;
512 riemann_event_add_attribute (event, "plugin", vl->plugin);
513 if (vl->plugin_instance[0] != 0)
514 riemann_event_add_attribute (event, "plugin_instance",
515 vl->plugin_instance);
517 riemann_event_add_attribute (event, "type", vl->type);
518 if (vl->type_instance[0] != 0)
519 riemann_event_add_attribute (event, "type_instance",
520 vl->type_instance);
522 if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL))
523 {
524 char ds_type[DATA_MAX_NAME_LEN];
526 ssnprintf (ds_type, sizeof (ds_type), "%s:rate",
527 DS_TYPE_TO_STRING(ds->ds[index].type));
528 riemann_event_add_attribute (event, "ds_type", ds_type);
529 }
530 else
531 {
532 riemann_event_add_attribute (event, "ds_type",
533 DS_TYPE_TO_STRING(ds->ds[index].type));
534 }
535 riemann_event_add_attribute (event, "ds_name", ds->ds[index].name);
536 {
537 char ds_index[DATA_MAX_NAME_LEN];
539 ssnprintf (ds_index, sizeof (ds_index), "%zu", index);
540 riemann_event_add_attribute (event, "ds_index", ds_index);
541 }
543 for (i = 0; i < riemann_attrs_num; i += 2)
544 riemann_event_add_attribute(event,
545 riemann_attrs[i],
546 riemann_attrs[i +1]);
548 for (i = 0; i < riemann_tags_num; i++)
549 riemann_event_add_tag (event, riemann_tags[i]);
551 if (ds->ds[index].type == DS_TYPE_GAUGE)
552 {
553 event->has_metric_d = 1;
554 event->metric_d = (double) vl->values[index].gauge;
555 }
556 else if (rates != NULL)
557 {
558 event->has_metric_d = 1;
559 event->metric_d = (double) rates[index];
560 }
561 else
562 {
563 event->has_metric_sint64 = 1;
564 if (ds->ds[index].type == DS_TYPE_DERIVE)
565 event->metric_sint64 = (int64_t) vl->values[index].derive;
566 else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
567 event->metric_sint64 = (int64_t) vl->values[index].absolute;
568 else
569 event->metric_sint64 = (int64_t) vl->values[index].counter;
570 }
572 format_name (name_buffer, sizeof (name_buffer),
573 /* host = */ "", vl->plugin, vl->plugin_instance,
574 vl->type, vl->type_instance);
575 if (host->always_append_ds || (ds->ds_num > 1))
576 {
577 if (host->event_service_prefix == NULL)
578 ssnprintf (service_buffer, sizeof (service_buffer), "%s/%s",
579 &name_buffer[1], ds->ds[index].name);
580 else
581 ssnprintf (service_buffer, sizeof (service_buffer), "%s%s/%s",
582 host->event_service_prefix, &name_buffer[1], ds->ds[index].name);
583 }
584 else
585 {
586 if (host->event_service_prefix == NULL)
587 sstrncpy (service_buffer, &name_buffer[1], sizeof (service_buffer));
588 else
589 ssnprintf (service_buffer, sizeof (service_buffer), "%s%s",
590 host->event_service_prefix, &name_buffer[1]);
591 }
593 event->service = strdup (service_buffer);
595 DEBUG ("write_riemann plugin: Successfully created protobuf for metric: "
596 "host = \"%s\", service = \"%s\"",
597 event->host, event->service);
598 return (event);
599 } /* }}} Event *riemann_value_to_protobuf */
601 static Msg *riemann_value_list_to_protobuf (struct riemann_host const *host, /* {{{ */
602 data_set_t const *ds,
603 value_list_t const *vl,
604 int *statuses)
605 {
606 Msg *msg;
607 size_t i;
608 gauge_t *rates = NULL;
610 /* Initialize the Msg structure. */
611 msg = malloc (sizeof (*msg));
612 if (msg == NULL)
613 {
614 ERROR ("write_riemann plugin: malloc failed.");
615 return (NULL);
616 }
617 memset (msg, 0, sizeof (*msg));
618 msg__init (msg);
620 /* Set up events. First, the list of pointers. */
621 msg->n_events = vl->values_len;
622 msg->events = calloc (msg->n_events, sizeof (*msg->events));
623 if (msg->events == NULL)
624 {
625 ERROR ("write_riemann plugin: calloc failed.");
626 riemann_msg_protobuf_free (msg);
627 return (NULL);
628 }
630 if (host->store_rates)
631 {
632 rates = uc_get_rate (ds, vl);
633 if (rates == NULL)
634 {
635 ERROR ("write_riemann plugin: uc_get_rate failed.");
636 riemann_msg_protobuf_free (msg);
637 return (NULL);
638 }
639 }
641 for (i = 0; i < msg->n_events; i++)
642 {
643 msg->events[i] = riemann_value_to_protobuf (host, ds, vl,
644 (int) i, rates, statuses[i]);
645 if (msg->events[i] == NULL)
646 {
647 riemann_msg_protobuf_free (msg);
648 sfree (rates);
649 return (NULL);
650 }
651 }
653 sfree (rates);
654 return (msg);
655 } /* }}} Msg *riemann_value_list_to_protobuf */
658 /*
659 * Always call while holding host->lock !
660 */
661 static int riemann_batch_flush_nolock (cdtime_t timeout,
662 struct riemann_host *host)
663 {
664 cdtime_t now;
665 int status = 0;
667 if (timeout > 0) {
668 now = cdtime ();
669 if ((host->batch_init + timeout) > now)
670 return status;
671 }
672 riemann_send_msg(host, host->batch_msg);
673 riemann_msg_protobuf_free(host->batch_msg);
675 if (host->use_tcp && ((status = riemann_recv_ack(host)) != 0))
676 riemann_disconnect (host);
678 host->batch_init = cdtime();
679 host->batch_msg = NULL;
680 return status;
681 }
683 static int riemann_batch_flush (cdtime_t timeout,
684 const char *identifier __attribute__((unused)),
685 user_data_t *user_data)
686 {
687 struct riemann_host *host;
688 int status;
690 if (user_data == NULL)
691 return (-EINVAL);
693 host = user_data->data;
694 pthread_mutex_lock (&host->lock);
695 status = riemann_batch_flush_nolock (timeout, host);
696 if (status != 0)
697 ERROR ("write_riemann plugin: riemann_send failed with status %i",
698 status);
700 pthread_mutex_unlock(&host->lock);
701 return status;
702 }
704 static int riemann_batch_add_value_list (struct riemann_host *host, /* {{{ */
705 data_set_t const *ds,
706 value_list_t const *vl,
707 int *statuses)
708 {
709 size_t i;
710 Event **events;
711 Msg *msg;
712 size_t len;
713 int ret;
715 msg = riemann_value_list_to_protobuf (host, ds, vl, statuses);
716 if (msg == NULL)
717 return -1;
719 pthread_mutex_lock(&host->lock);
721 if (host->batch_msg == NULL) {
722 host->batch_msg = msg;
723 } else {
724 len = msg->n_events + host->batch_msg->n_events;
725 events = realloc(host->batch_msg->events,
726 (len * sizeof(*host->batch_msg->events)));
727 if (events == NULL) {
728 pthread_mutex_unlock(&host->lock);
729 ERROR ("write_riemann plugin: out of memory");
730 riemann_msg_protobuf_free (msg);
731 return -1;
732 }
733 host->batch_msg->events = events;
735 for (i = host->batch_msg->n_events; i < len; i++)
736 host->batch_msg->events[i] = msg->events[i - host->batch_msg->n_events];
738 host->batch_msg->n_events = len;
739 sfree (msg->events);
740 msg->n_events = 0;
741 sfree (msg);
742 }
744 len = msg__get_packed_size(host->batch_msg);
745 ret = 0;
746 if ((host->batch_max < 0) || (((size_t) host->batch_max) <= len)) {
747 ret = riemann_batch_flush_nolock(0, host);
748 }
750 pthread_mutex_unlock(&host->lock);
751 return ret;
752 } /* }}} Msg *riemann_batch_add_value_list */
754 static int riemann_notification(const notification_t *n, user_data_t *ud) /* {{{ */
755 {
756 int status;
757 struct riemann_host *host = ud->data;
758 Msg *msg;
760 if (!host->notifications)
761 return 0;
763 /*
764 * Never batch for notifications, send them ASAP
765 */
766 msg = riemann_notification_to_protobuf (host, n);
767 if (msg == NULL)
768 return (-1);
770 status = riemann_send (host, msg);
771 if (status != 0)
772 ERROR ("write_riemann plugin: riemann_send failed with status %i",
773 status);
775 riemann_msg_protobuf_free (msg);
776 return (status);
777 } /* }}} int riemann_notification */
779 static int riemann_write(const data_set_t *ds, /* {{{ */
780 const value_list_t *vl,
781 user_data_t *ud)
782 {
783 int status = 0;
784 int statuses[vl->values_len];
785 struct riemann_host *host = ud->data;
787 if (host->check_thresholds) {
788 status = write_riemann_threshold_check(ds, vl, statuses);
789 if (status != 0)
790 return status;
791 } else {
792 memset (statuses, 0, sizeof (statuses));
793 }
795 if (host->use_tcp == 1 && host->batch_mode) {
796 riemann_batch_add_value_list (host, ds, vl, statuses);
797 } else {
798 Msg *msg = riemann_value_list_to_protobuf (host, ds, vl, statuses);
799 if (msg == NULL)
800 return (-1);
802 status = riemann_send (host, msg);
803 if (status != 0)
804 ERROR ("write_riemann plugin: riemann_send failed with status %i", status);
806 riemann_msg_protobuf_free (msg);
807 }
809 return status;
810 } /* }}} int riemann_write */
812 static void riemann_free(void *p) /* {{{ */
813 {
814 struct riemann_host *host = p;
816 if (host == NULL)
817 return;
819 pthread_mutex_lock (&host->lock);
821 host->reference_count--;
822 if (host->reference_count > 0)
823 {
824 pthread_mutex_unlock (&host->lock);
825 return;
826 }
828 riemann_disconnect (host);
830 sfree(host->service);
831 pthread_mutex_destroy (&host->lock);
832 sfree(host);
833 } /* }}} void riemann_free */
835 static int riemann_config_node(oconfig_item_t *ci) /* {{{ */
836 {
837 struct riemann_host *host = NULL;
838 int status = 0;
839 int i;
840 oconfig_item_t *child;
841 char callback_name[DATA_MAX_NAME_LEN];
842 user_data_t ud;
844 if ((host = calloc(1, sizeof (*host))) == NULL) {
845 ERROR ("write_riemann plugin: calloc failed.");
846 return ENOMEM;
847 }
848 pthread_mutex_init (&host->lock, NULL);
849 host->reference_count = 1;
850 host->node = NULL;
851 host->service = NULL;
852 host->notifications = 1;
853 host->check_thresholds = 0;
854 host->store_rates = 1;
855 host->always_append_ds = 0;
856 host->use_tcp = 1;
857 host->batch_mode = 1;
858 host->batch_max = RIEMANN_BATCH_MAX; /* typical MSS */
859 host->batch_init = cdtime();
860 host->ttl_factor = RIEMANN_TTL_FACTOR;
862 status = cf_util_get_string (ci, &host->name);
863 if (status != 0) {
864 WARNING("write_riemann plugin: Required host name is missing.");
865 riemann_free (host);
866 return -1;
867 }
869 for (i = 0; i < ci->children_num; i++) {
870 /*
871 * The code here could be simplified but makes room
872 * for easy adding of new options later on.
873 */
874 child = &ci->children[i];
875 status = 0;
877 if (strcasecmp ("Host", child->key) == 0) {
878 status = cf_util_get_string (child, &host->node);
879 if (status != 0)
880 break;
881 } else if (strcasecmp ("Notifications", child->key) == 0) {
882 status = cf_util_get_boolean(child, &host->notifications);
883 if (status != 0)
884 break;
885 } else if (strcasecmp ("EventServicePrefix", child->key) == 0) {
886 status = cf_util_get_string (child, &host->event_service_prefix);
887 if (status != 0)
888 break;
889 } else if (strcasecmp ("CheckThresholds", child->key) == 0) {
890 status = cf_util_get_boolean(child, &host->check_thresholds);
891 if (status != 0)
892 break;
893 } else if (strcasecmp ("Batch", child->key) == 0) {
894 status = cf_util_get_boolean(child, &host->batch_mode);
895 if (status != 0)
896 break;
897 } else if (strcasecmp("BatchMaxSize", child->key) == 0) {
898 status = cf_util_get_int(child, &host->batch_max);
899 if (status != 0)
900 break;
901 } else if (strcasecmp ("Port", child->key) == 0) {
902 status = cf_util_get_service (child, &host->service);
903 if (status != 0) {
904 ERROR ("write_riemann plugin: Invalid argument "
905 "configured for the \"Port\" "
906 "option.");
907 break;
908 }
909 } else if (strcasecmp ("Protocol", child->key) == 0) {
910 char tmp[16];
911 status = cf_util_get_string_buffer (child,
912 tmp, sizeof (tmp));
913 if (status != 0)
914 {
915 ERROR ("write_riemann plugin: cf_util_get_"
916 "string_buffer failed with "
917 "status %i.", status);
918 break;
919 }
921 if (strcasecmp ("UDP", tmp) == 0)
922 host->use_tcp = 0;
923 else if (strcasecmp ("TCP", tmp) == 0)
924 host->use_tcp = 1;
925 else
926 WARNING ("write_riemann plugin: The value "
927 "\"%s\" is not valid for the "
928 "\"Protocol\" option. Use "
929 "either \"UDP\" or \"TCP\".",
930 tmp);
931 } else if (strcasecmp ("StoreRates", child->key) == 0) {
932 status = cf_util_get_boolean (child, &host->store_rates);
933 if (status != 0)
934 break;
935 } else if (strcasecmp ("AlwaysAppendDS", child->key) == 0) {
936 status = cf_util_get_boolean (child,
937 &host->always_append_ds);
938 if (status != 0)
939 break;
940 } else if (strcasecmp ("TTLFactor", child->key) == 0) {
941 double tmp = NAN;
942 status = cf_util_get_double (child, &tmp);
943 if (status != 0)
944 break;
945 if (tmp >= 2.0) {
946 host->ttl_factor = tmp;
947 } else if (tmp >= 1.0) {
948 NOTICE ("write_riemann plugin: The configured "
949 "TTLFactor is very small "
950 "(%.1f). A value of 2.0 or "
951 "greater is recommended.",
952 tmp);
953 host->ttl_factor = tmp;
954 } else if (tmp > 0.0) {
955 WARNING ("write_riemann plugin: The configured "
956 "TTLFactor is too small to be "
957 "useful (%.1f). I'll use it "
958 "since the user knows best, "
959 "but under protest.",
960 tmp);
961 host->ttl_factor = tmp;
962 } else { /* zero, negative and NAN */
963 ERROR ("write_riemann plugin: The configured "
964 "TTLFactor is invalid (%.1f).",
965 tmp);
966 }
967 } else {
968 WARNING("write_riemann plugin: ignoring unknown config "
969 "option: \"%s\"", child->key);
970 }
971 }
972 if (status != 0) {
973 riemann_free (host);
974 return status;
975 }
977 ssnprintf (callback_name, sizeof (callback_name), "write_riemann/%s",
978 host->name);
979 ud.data = host;
980 ud.free_func = riemann_free;
982 pthread_mutex_lock (&host->lock);
984 status = plugin_register_write (callback_name, riemann_write, &ud);
986 if (host->use_tcp == 1 && host->batch_mode) {
987 ud.free_func = NULL;
988 plugin_register_flush(callback_name, riemann_batch_flush, &ud);
989 }
990 if (status != 0)
991 WARNING ("write_riemann plugin: plugin_register_write (\"%s\") "
992 "failed with status %i.",
993 callback_name, status);
994 else /* success */
995 host->reference_count++;
997 status = plugin_register_notification (callback_name,
998 riemann_notification, &ud);
999 if (status != 0)
1000 WARNING ("write_riemann plugin: plugin_register_notification (\"%s\") "
1001 "failed with status %i.",
1002 callback_name, status);
1003 else /* success */
1004 host->reference_count++;
1006 if (host->reference_count <= 1)
1007 {
1008 /* Both callbacks failed => free memory.
1009 * We need to unlock here, because riemann_free() will lock.
1010 * This is not a race condition, because we're the only one
1011 * holding a reference. */
1012 pthread_mutex_unlock (&host->lock);
1013 riemann_free (host);
1014 return (-1);
1015 }
1017 host->reference_count--;
1018 pthread_mutex_unlock (&host->lock);
1020 return status;
1021 } /* }}} int riemann_config_node */
1023 static int riemann_config(oconfig_item_t *ci) /* {{{ */
1024 {
1025 int i;
1026 oconfig_item_t *child;
1027 int status;
1029 for (i = 0; i < ci->children_num; i++) {
1030 child = &ci->children[i];
1032 if (strcasecmp("Node", child->key) == 0) {
1033 riemann_config_node (child);
1034 } else if (strcasecmp(child->key, "attribute") == 0) {
1035 char *key = NULL;
1036 char *val = NULL;
1038 if (child->values_num != 2) {
1039 WARNING("riemann attributes need both a key and a value.");
1040 return (-1);
1041 }
1042 if (child->values[0].type != OCONFIG_TYPE_STRING ||
1043 child->values[1].type != OCONFIG_TYPE_STRING) {
1044 WARNING("riemann attribute needs string arguments.");
1045 return (-1);
1046 }
1047 if ((key = strdup(child->values[0].value.string)) == NULL) {
1048 WARNING("cannot allocate memory for attribute key.");
1049 return (-1);
1050 }
1051 if ((val = strdup(child->values[1].value.string)) == NULL) {
1052 WARNING("cannot allocate memory for attribute value.");
1053 return (-1);
1054 }
1055 strarray_add(&riemann_attrs, &riemann_attrs_num, key);
1056 strarray_add(&riemann_attrs, &riemann_attrs_num, val);
1057 DEBUG("write_riemann: got attr: %s => %s", key, val);
1058 sfree(key);
1059 sfree(val);
1060 } else if (strcasecmp(child->key, "tag") == 0) {
1061 char *tmp = NULL;
1062 status = cf_util_get_string(child, &tmp);
1063 if (status != 0)
1064 continue;
1066 strarray_add (&riemann_tags, &riemann_tags_num, tmp);
1067 DEBUG("write_riemann plugin: Got tag: %s", tmp);
1068 sfree (tmp);
1069 } else {
1070 WARNING ("write_riemann plugin: Ignoring unknown "
1071 "configuration option \"%s\" at top level.",
1072 child->key);
1073 }
1074 }
1075 return (0);
1076 } /* }}} int riemann_config */
1078 void module_register(void)
1079 {
1080 plugin_register_complex_config ("write_riemann", riemann_config);
1081 }
1083 /* vim: set sw=8 sts=8 ts=8 noet : */