2 * collectd - src/write_riemann.c
3 * Copyright (C) 2012,2013 Pierre-Yves Ritschard
4 * Copyright (C) 2013 Florian octo Forster
5 * Copyright (C) 2015,2016 Gergely Nagy
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
26 * Pierre-Yves Ritschard <pyr at spootnik.org>
27 * Florian octo Forster <octo at collectd.org>
28 * Gergely Nagy <algernon at madhouse-project.org>
34 #include "utils/common/common.h"
35 #include "utils_cache.h"
36 #include "utils_complain.h"
37 #include "write_riemann_threshold.h"
39 #include <riemann/riemann-client.h>
41 #define RIEMANN_HOST "localhost"
42 #define RIEMANN_PORT 5555
43 #define RIEMANN_TTL_FACTOR 2.0
44 #define RIEMANN_BATCH_MAX 8192
47 c_complain_t init_complaint;
49 char *event_service_prefix;
53 bool check_thresholds;
55 bool always_append_ds;
58 riemann_client_type_t client_type;
59 riemann_client_t *client;
65 riemann_message_t *batch_msg;
69 struct timeval timeout;
72 static char **riemann_tags;
73 static size_t riemann_tags_num;
74 static char **riemann_attrs;
75 static size_t riemann_attrs_num;
77 /* host->lock must be held when calling this function. */
78 static int wrr_connect(struct riemann_host *host) /* {{{ */
86 node = (host->node != NULL) ? host->node : RIEMANN_HOST;
87 port = (host->port) ? host->port : RIEMANN_PORT;
91 host->client = riemann_client_create(
92 host->client_type, node, port, RIEMANN_CLIENT_OPTION_TLS_CA_FILE,
93 host->tls_ca_file, RIEMANN_CLIENT_OPTION_TLS_CERT_FILE,
94 host->tls_cert_file, RIEMANN_CLIENT_OPTION_TLS_KEY_FILE,
95 host->tls_key_file, RIEMANN_CLIENT_OPTION_NONE);
96 if (host->client == NULL) {
97 c_complain(LOG_ERR, &host->init_complaint,
98 "write_riemann plugin: Unable to connect to Riemann at %s:%d",
102 #if RCC_VERSION_NUMBER >= 0x010800
103 if (host->timeout.tv_sec != 0) {
104 if (riemann_client_set_timeout(host->client, &host->timeout) != 0) {
105 riemann_client_free(host->client);
107 c_complain(LOG_ERR, &host->init_complaint,
108 "write_riemann plugin: Unable to connect to Riemann at %s:%d",
115 set_sock_opts(riemann_client_get_fd(host->client));
117 c_release(LOG_INFO, &host->init_complaint,
118 "write_riemann plugin: Successfully connected to %s:%d", node,
122 } /* }}} int wrr_connect */
124 /* host->lock must be held when calling this function. */
125 static int wrr_disconnect(struct riemann_host *host) /* {{{ */
130 riemann_client_free(host->client);
134 } /* }}} int wrr_disconnect */
137 * Function to send messages to riemann.
139 * Acquires the host lock, disconnects on errors.
141 static int wrr_send_nolock(struct riemann_host *host,
142 riemann_message_t *msg) /* {{{ */
146 status = wrr_connect(host);
151 status = riemann_client_send_message(host->client, msg);
153 wrr_disconnect(host);
158 * For TCP we need to receive message acknowledgemenent.
160 if (host->client_type != RIEMANN_CLIENT_UDP) {
161 riemann_message_t *response;
163 response = riemann_client_recv_message(host->client);
165 if (response == NULL) {
166 wrr_disconnect(host);
169 riemann_message_free(response);
173 } /* }}} int wrr_send */
175 static int wrr_send(struct riemann_host *host, riemann_message_t *msg) {
178 pthread_mutex_lock(&host->lock);
179 status = wrr_send_nolock(host, msg);
180 pthread_mutex_unlock(&host->lock);
184 static riemann_message_t *wrr_notification_to_message(notification_t const *n) {
185 riemann_message_t *msg;
186 riemann_event_t *event;
187 char service_buffer[6 * DATA_MAX_NAME_LEN];
188 char const *severity;
190 switch (n->severity) {
195 severity = "warning";
198 severity = "critical";
201 severity = "unknown";
204 format_name(service_buffer, sizeof(service_buffer),
205 /* host = */ "", n->plugin, n->plugin_instance, n->type,
208 event = riemann_event_create(
209 RIEMANN_EVENT_FIELD_HOST, n->host, RIEMANN_EVENT_FIELD_TIME,
210 (int64_t)CDTIME_T_TO_TIME_T(n->time), RIEMANN_EVENT_FIELD_TAGS,
211 "notification", NULL, RIEMANN_EVENT_FIELD_STATE, severity,
212 RIEMANN_EVENT_FIELD_SERVICE, &service_buffer[1],
213 RIEMANN_EVENT_FIELD_NONE);
215 #if RCC_VERSION_NUMBER >= 0x010A00
216 riemann_event_set(event, RIEMANN_EVENT_FIELD_TIME_MICROS,
217 (int64_t)CDTIME_T_TO_US(n->time));
221 riemann_event_string_attribute_add(event, "host", n->host);
222 if (n->plugin[0] != 0)
223 riemann_event_string_attribute_add(event, "plugin", n->plugin);
224 if (n->plugin_instance[0] != 0)
225 riemann_event_string_attribute_add(event, "plugin_instance",
229 riemann_event_string_attribute_add(event, "type", n->type);
230 if (n->type_instance[0] != 0)
231 riemann_event_string_attribute_add(event, "type_instance",
234 for (size_t i = 0; i < riemann_attrs_num; i += 2)
235 riemann_event_string_attribute_add(event, riemann_attrs[i],
236 riemann_attrs[i + 1]);
238 for (size_t i = 0; i < riemann_tags_num; i++)
239 riemann_event_tag_add(event, riemann_tags[i]);
241 if (n->message[0] != 0)
242 riemann_event_string_attribute_add(event, "description", n->message);
244 /* Pull in values from threshold and add extra attributes */
245 for (notification_meta_t *meta = n->meta; meta != NULL; meta = meta->next) {
246 if (strcasecmp("CurrentValue", meta->name) == 0 &&
247 meta->type == NM_TYPE_DOUBLE) {
248 riemann_event_set(event, RIEMANN_EVENT_FIELD_METRIC_D,
249 (double)meta->nm_value.nm_double,
250 RIEMANN_EVENT_FIELD_NONE);
254 if (meta->type == NM_TYPE_STRING) {
255 riemann_event_string_attribute_add(event, meta->name,
256 meta->nm_value.nm_string);
261 msg = riemann_message_create_with_events(event, NULL);
263 ERROR("write_riemann plugin: riemann_message_create_with_events() failed.");
264 riemann_event_free(event);
268 DEBUG("write_riemann plugin: Successfully created message for notification: "
269 "host = \"%s\", service = \"%s\", state = \"%s\"",
270 event->host, event->service, event->state);
274 static riemann_event_t *
275 wrr_value_to_event(struct riemann_host const *host, /* {{{ */
276 data_set_t const *ds, value_list_t const *vl, size_t index,
277 gauge_t const *rates, int status) {
278 riemann_event_t *event;
279 char name_buffer[5 * DATA_MAX_NAME_LEN];
280 char service_buffer[6 * DATA_MAX_NAME_LEN];
283 event = riemann_event_new();
285 ERROR("write_riemann plugin: riemann_event_new() failed.");
289 format_name(name_buffer, sizeof(name_buffer),
290 /* host = */ "", vl->plugin, vl->plugin_instance, vl->type,
292 if (host->always_append_ds || (ds->ds_num > 1)) {
293 if (host->event_service_prefix == NULL)
294 ssnprintf(service_buffer, sizeof(service_buffer), "%s/%s",
295 &name_buffer[1], ds->ds[index].name);
297 ssnprintf(service_buffer, sizeof(service_buffer), "%s%s/%s",
298 host->event_service_prefix, &name_buffer[1],
301 if (host->event_service_prefix == NULL)
302 sstrncpy(service_buffer, &name_buffer[1], sizeof(service_buffer));
304 ssnprintf(service_buffer, sizeof(service_buffer), "%s%s",
305 host->event_service_prefix, &name_buffer[1]);
309 event, RIEMANN_EVENT_FIELD_HOST, vl->host, RIEMANN_EVENT_FIELD_TIME,
310 (int64_t)CDTIME_T_TO_TIME_T(vl->time), RIEMANN_EVENT_FIELD_TTL,
311 (float)CDTIME_T_TO_DOUBLE(vl->interval) * host->ttl_factor,
312 RIEMANN_EVENT_FIELD_STRING_ATTRIBUTES, "plugin", vl->plugin, "type",
313 vl->type, "ds_name", ds->ds[index].name, NULL,
314 RIEMANN_EVENT_FIELD_SERVICE, service_buffer, RIEMANN_EVENT_FIELD_NONE);
316 #if RCC_VERSION_NUMBER >= 0x010A00
317 riemann_event_set(event, RIEMANN_EVENT_FIELD_TIME_MICROS,
318 (int64_t)CDTIME_T_TO_US(vl->time));
321 if (host->check_thresholds) {
322 const char *state = NULL;
339 riemann_event_set(event, RIEMANN_EVENT_FIELD_STATE, state,
340 RIEMANN_EVENT_FIELD_NONE);
343 if (vl->plugin_instance[0] != 0)
344 riemann_event_string_attribute_add(event, "plugin_instance",
345 vl->plugin_instance);
346 if (vl->type_instance[0] != 0)
347 riemann_event_string_attribute_add(event, "type_instance",
350 if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL)) {
351 char ds_type[DATA_MAX_NAME_LEN];
353 ssnprintf(ds_type, sizeof(ds_type), "%s:rate",
354 DS_TYPE_TO_STRING(ds->ds[index].type));
355 riemann_event_string_attribute_add(event, "ds_type", ds_type);
357 riemann_event_string_attribute_add(event, "ds_type",
358 DS_TYPE_TO_STRING(ds->ds[index].type));
362 char ds_index[DATA_MAX_NAME_LEN];
364 ssnprintf(ds_index, sizeof(ds_index), "%" PRIsz, index);
365 riemann_event_string_attribute_add(event, "ds_index", ds_index);
368 for (i = 0; i < riemann_attrs_num; i += 2)
369 riemann_event_string_attribute_add(event, riemann_attrs[i],
370 riemann_attrs[i + 1]);
372 for (i = 0; i < riemann_tags_num; i++)
373 riemann_event_tag_add(event, riemann_tags[i]);
375 if (ds->ds[index].type == DS_TYPE_GAUGE) {
376 riemann_event_set(event, RIEMANN_EVENT_FIELD_METRIC_D,
377 (double)vl->values[index].gauge,
378 RIEMANN_EVENT_FIELD_NONE);
379 } else if (rates != NULL) {
380 riemann_event_set(event, RIEMANN_EVENT_FIELD_METRIC_D, (double)rates[index],
381 RIEMANN_EVENT_FIELD_NONE);
385 if (ds->ds[index].type == DS_TYPE_DERIVE)
386 metric = (int64_t)vl->values[index].derive;
387 else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
388 metric = (int64_t)vl->values[index].absolute;
390 metric = (int64_t)vl->values[index].counter;
392 riemann_event_set(event, RIEMANN_EVENT_FIELD_METRIC_S64, (int64_t)metric,
393 RIEMANN_EVENT_FIELD_NONE);
396 DEBUG("write_riemann plugin: Successfully created message for metric: "
397 "host = \"%s\", service = \"%s\"",
398 event->host, event->service);
400 } /* }}} riemann_event_t *wrr_value_to_event */
402 static riemann_message_t *
403 wrr_value_list_to_message(struct riemann_host const *host, /* {{{ */
404 data_set_t const *ds, value_list_t const *vl,
406 riemann_message_t *msg;
408 gauge_t *rates = NULL;
410 /* Initialize the Msg structure. */
411 msg = riemann_message_new();
413 ERROR("write_riemann plugin: riemann_message_new failed.");
417 if (host->store_rates) {
418 rates = uc_get_rate(ds, vl);
420 ERROR("write_riemann plugin: uc_get_rate failed.");
421 riemann_message_free(msg);
426 for (i = 0; i < vl->values_len; i++) {
427 riemann_event_t *event;
429 event = wrr_value_to_event(host, ds, vl, (int)i, rates, statuses[i]);
431 riemann_message_free(msg);
435 riemann_message_append_events(msg, event, NULL);
440 } /* }}} riemann_message_t *wrr_value_list_to_message */
443 * Always call while holding host->lock !
445 static int wrr_batch_flush_nolock(cdtime_t timeout, struct riemann_host *host) {
451 if ((host->batch_init + timeout) > now) {
455 wrr_send_nolock(host, host->batch_msg);
456 riemann_message_free(host->batch_msg);
458 host->batch_init = now;
459 host->batch_msg = NULL;
463 static int wrr_batch_flush(cdtime_t timeout,
464 const char *identifier __attribute__((unused)),
465 user_data_t *user_data) {
466 struct riemann_host *host;
469 if (user_data == NULL)
472 host = user_data->data;
473 pthread_mutex_lock(&host->lock);
474 status = wrr_batch_flush_nolock(timeout, host);
477 LOG_ERR, &host->init_complaint,
478 "write_riemann plugin: riemann_client_send failed with status %i",
481 c_release(LOG_DEBUG, &host->init_complaint,
482 "write_riemann plugin: batch sent.");
484 pthread_mutex_unlock(&host->lock);
488 static int wrr_batch_add_value_list(struct riemann_host *host, /* {{{ */
489 data_set_t const *ds,
490 value_list_t const *vl, int *statuses) {
491 riemann_message_t *msg;
496 msg = wrr_value_list_to_message(host, ds, vl, statuses);
500 pthread_mutex_lock(&host->lock);
502 if (host->batch_msg == NULL) {
503 host->batch_msg = msg;
507 status = riemann_message_append_events_n(host->batch_msg, msg->n_events,
512 riemann_message_free(msg);
515 pthread_mutex_unlock(&host->lock);
516 ERROR("write_riemann plugin: out of memory");
521 len = riemann_message_get_packed_size(host->batch_msg);
523 if ((host->batch_max < 0) || (((size_t)host->batch_max) <= len)) {
524 ret = wrr_batch_flush_nolock(0, host);
526 if (host->batch_timeout > 0) {
527 timeout = TIME_T_TO_CDTIME_T((time_t)host->batch_timeout);
528 ret = wrr_batch_flush_nolock(timeout, host);
532 pthread_mutex_unlock(&host->lock);
534 } /* }}} riemann_message_t *wrr_batch_add_value_list */
536 static int wrr_notification(const notification_t *n, user_data_t *ud) /* {{{ */
539 struct riemann_host *host = ud->data;
540 riemann_message_t *msg;
542 if (!host->notifications)
546 * Never batch for notifications, send them ASAP
548 msg = wrr_notification_to_message(n);
552 status = wrr_send(host, msg);
555 LOG_ERR, &host->init_complaint,
556 "write_riemann plugin: riemann_client_send failed with status %i",
559 c_release(LOG_DEBUG, &host->init_complaint,
560 "write_riemann plugin: riemann_client_send succeeded");
562 riemann_message_free(msg);
564 } /* }}} int wrr_notification */
566 static int wrr_write(const data_set_t *ds, /* {{{ */
567 const value_list_t *vl, user_data_t *ud) {
569 int statuses[vl->values_len];
570 struct riemann_host *host = ud->data;
571 riemann_message_t *msg;
573 if (host->check_thresholds) {
574 status = write_riemann_threshold_check(ds, vl, statuses);
578 memset(statuses, 0, sizeof(statuses));
581 if (host->client_type != RIEMANN_CLIENT_UDP && host->batch_mode) {
582 wrr_batch_add_value_list(host, ds, vl, statuses);
584 msg = wrr_value_list_to_message(host, ds, vl, statuses);
588 status = wrr_send(host, msg);
590 riemann_message_free(msg);
593 } /* }}} int wrr_write */
595 static void wrr_free(void *p) /* {{{ */
597 struct riemann_host *host = p;
602 pthread_mutex_lock(&host->lock);
604 host->reference_count--;
605 if (host->reference_count > 0) {
606 pthread_mutex_unlock(&host->lock);
610 wrr_disconnect(host);
612 pthread_mutex_lock(&host->lock);
613 pthread_mutex_destroy(&host->lock);
615 } /* }}} void wrr_free */
617 static int wrr_config_node(oconfig_item_t *ci) /* {{{ */
619 struct riemann_host *host = NULL;
622 oconfig_item_t *child;
623 char callback_name[DATA_MAX_NAME_LEN];
625 if ((host = calloc(1, sizeof(*host))) == NULL) {
626 ERROR("write_riemann plugin: calloc failed.");
629 pthread_mutex_init(&host->lock, NULL);
630 C_COMPLAIN_INIT(&host->init_complaint);
631 host->reference_count = 1;
634 host->notifications = true;
635 host->check_thresholds = false;
636 host->store_rates = true;
637 host->always_append_ds = false;
638 host->batch_mode = true;
639 host->batch_max = RIEMANN_BATCH_MAX; /* typical MSS */
640 host->batch_init = cdtime();
641 host->batch_timeout = 0;
642 host->ttl_factor = RIEMANN_TTL_FACTOR;
644 host->client_type = RIEMANN_CLIENT_TCP;
645 host->timeout.tv_sec = 0;
646 host->timeout.tv_usec = 0;
648 status = cf_util_get_string(ci, &host->name);
650 WARNING("write_riemann plugin: Required host name is missing.");
655 for (i = 0; i < ci->children_num; i++) {
657 * The code here could be simplified but makes room
658 * for easy adding of new options later on.
660 child = &ci->children[i];
663 if (strcasecmp("Host", child->key) == 0) {
664 status = cf_util_get_string(child, &host->node);
667 } else if (strcasecmp("Notifications", child->key) == 0) {
668 status = cf_util_get_boolean(child, &host->notifications);
671 } else if (strcasecmp("EventServicePrefix", child->key) == 0) {
672 status = cf_util_get_string(child, &host->event_service_prefix);
675 } else if (strcasecmp("CheckThresholds", child->key) == 0) {
676 status = cf_util_get_boolean(child, &host->check_thresholds);
679 } else if (strcasecmp("Batch", child->key) == 0) {
680 status = cf_util_get_boolean(child, &host->batch_mode);
683 } else if (strcasecmp("BatchMaxSize", child->key) == 0) {
684 status = cf_util_get_int(child, &host->batch_max);
687 } else if (strcasecmp("BatchFlushTimeout", child->key) == 0) {
688 status = cf_util_get_int(child, &host->batch_timeout);
691 } else if (strcasecmp("Timeout", child->key) == 0) {
692 #if RCC_VERSION_NUMBER >= 0x010800
693 status = cf_util_get_int(child, (int *)&host->timeout.tv_sec);
697 WARNING("write_riemann plugin: The Timeout option is not supported. "
698 "Please upgrade the Riemann client to at least 1.8.0.");
700 } else if (strcasecmp("Port", child->key) == 0) {
701 host->port = cf_util_get_port_number(child);
702 if (host->port == -1) {
705 } else if (strcasecmp("Protocol", child->key) == 0) {
707 status = cf_util_get_string_buffer(child, tmp, sizeof(tmp));
711 if (strcasecmp("UDP", tmp) == 0)
712 host->client_type = RIEMANN_CLIENT_UDP;
713 else if (strcasecmp("TCP", tmp) == 0)
714 host->client_type = RIEMANN_CLIENT_TCP;
715 else if (strcasecmp("TLS", tmp) == 0)
716 host->client_type = RIEMANN_CLIENT_TLS;
718 WARNING("write_riemann plugin: The value "
719 "\"%s\" is not valid for the "
720 "\"Protocol\" option. Use "
721 "either \"UDP\", \"TCP\" or \"TLS\".",
723 } else if (strcasecmp("TLSCAFile", child->key) == 0) {
724 status = cf_util_get_string(child, &host->tls_ca_file);
727 } else if (strcasecmp("TLSCertFile", child->key) == 0) {
728 status = cf_util_get_string(child, &host->tls_cert_file);
731 } else if (strcasecmp("TLSKeyFile", child->key) == 0) {
732 status = cf_util_get_string(child, &host->tls_key_file);
735 } else if (strcasecmp("StoreRates", child->key) == 0) {
736 status = cf_util_get_boolean(child, &host->store_rates);
739 } else if (strcasecmp("AlwaysAppendDS", child->key) == 0) {
740 status = cf_util_get_boolean(child, &host->always_append_ds);
743 } else if (strcasecmp("TTLFactor", child->key) == 0) {
745 status = cf_util_get_double(child, &tmp);
749 host->ttl_factor = tmp;
750 } else if (tmp >= 1.0) {
751 NOTICE("write_riemann plugin: The configured "
752 "TTLFactor is very small "
753 "(%.1f). A value of 2.0 or "
754 "greater is recommended.",
756 host->ttl_factor = tmp;
757 } else if (tmp > 0.0) {
758 WARNING("write_riemann plugin: The configured "
759 "TTLFactor is too small to be "
760 "useful (%.1f). I'll use it "
761 "since the user knows best, "
762 "but under protest.",
764 host->ttl_factor = tmp;
765 } else { /* zero, negative and NAN */
766 ERROR("write_riemann plugin: The configured "
767 "TTLFactor is invalid (%.1f).",
771 WARNING("write_riemann plugin: ignoring unknown config "
781 ssnprintf(callback_name, sizeof(callback_name), "write_riemann/%s",
784 user_data_t ud = {.data = host, .free_func = wrr_free};
786 pthread_mutex_lock(&host->lock);
788 status = plugin_register_write(callback_name, wrr_write, &ud);
790 if (host->client_type != RIEMANN_CLIENT_UDP && host->batch_mode) {
792 plugin_register_flush(callback_name, wrr_batch_flush, &ud);
795 WARNING("write_riemann plugin: plugin_register_write (\"%s\") "
796 "failed with status %i.",
797 callback_name, status);
799 host->reference_count++;
801 status = plugin_register_notification(callback_name, wrr_notification, &ud);
803 WARNING("write_riemann plugin: plugin_register_notification (\"%s\") "
804 "failed with status %i.",
805 callback_name, status);
807 host->reference_count++;
809 if (host->reference_count <= 1) {
810 /* Both callbacks failed => free memory.
811 * We need to unlock here, because riemann_free() will lock.
812 * This is not a race condition, because we're the only one
813 * holding a reference. */
814 pthread_mutex_unlock(&host->lock);
819 host->reference_count--;
820 pthread_mutex_unlock(&host->lock);
823 } /* }}} int wrr_config_node */
825 static int wrr_config(oconfig_item_t *ci) /* {{{ */
828 oconfig_item_t *child;
831 for (i = 0; i < ci->children_num; i++) {
832 child = &ci->children[i];
834 if (strcasecmp("Node", child->key) == 0) {
835 wrr_config_node(child);
836 } else if (strcasecmp(child->key, "attribute") == 0) {
840 if (child->values_num != 2) {
841 WARNING("riemann attributes need both a key and a value.");
844 if (child->values[0].type != OCONFIG_TYPE_STRING ||
845 child->values[1].type != OCONFIG_TYPE_STRING) {
846 WARNING("riemann attribute needs string arguments.");
849 if ((key = strdup(child->values[0].value.string)) == NULL) {
850 WARNING("cannot allocate memory for attribute key.");
853 if ((val = strdup(child->values[1].value.string)) == NULL) {
854 WARNING("cannot allocate memory for attribute value.");
858 strarray_add(&riemann_attrs, &riemann_attrs_num, key);
859 strarray_add(&riemann_attrs, &riemann_attrs_num, val);
860 DEBUG("write_riemann: got attr: %s => %s", key, val);
863 } else if (strcasecmp(child->key, "tag") == 0) {
865 status = cf_util_get_string(child, &tmp);
869 strarray_add(&riemann_tags, &riemann_tags_num, tmp);
870 DEBUG("write_riemann plugin: Got tag: %s", tmp);
873 WARNING("write_riemann plugin: Ignoring unknown "
874 "configuration option \"%s\" at top level.",
879 } /* }}} int wrr_config */
881 void module_register(void) {
882 plugin_register_complex_config("write_riemann", wrr_config);