2 * collectd - src/write_tsdb.c
3 * Copyright (C) 2012 Pierre-Yves Ritschard
4 * Copyright (C) 2011 Scott Sanders
5 * Copyright (C) 2009 Paul Sadauskas
6 * Copyright (C) 2009 Doug MacEachern
7 * Copyright (C) 2007-2012 Florian octo Forster
8 * Copyright (C) 2013-2014 Limelight Networks, Inc.
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; only version 2 of the License is applicable.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * Based on the write_graphite plugin. Authors:
23 * Florian octo Forster <octo at collectd.org>
24 * Doug MacEachern <dougm at hyperic.com>
25 * Paul Sadauskas <psadauskas at gmail.com>
26 * Scott Sanders <scott at jssjr.com>
27 * Pierre-Yves Ritschard <pyr at spootnik.org>
29 * Brett Hawn <bhawn at llnw.com>
30 * Kevin Bowling <kbowling@llnw.com>
33 /* write_tsdb plugin configuation example
39 * HostTags "status=production deviceclass=www"
47 #include "configfile.h"
49 #include "utils_cache.h"
52 #include <sys/socket.h>
55 #ifndef WT_DEFAULT_NODE
56 # define WT_DEFAULT_NODE "localhost"
59 #ifndef WT_DEFAULT_SERVICE
60 # define WT_DEFAULT_SERVICE "4242"
63 #ifndef WT_DEFAULT_ESCAPE
64 # define WT_DEFAULT_ESCAPE '.'
67 /* Ethernet - (IPv6 + TCP) = 1500 - (40 + 32) = 1428 */
68 #ifndef WT_SEND_BUF_SIZE
69 # define WT_SEND_BUF_SIZE 1428
84 _Bool always_append_ds;
86 char send_buf[WT_SEND_BUF_SIZE];
89 cdtime_t send_buf_init_time;
91 pthread_mutex_t send_lock;
98 static void wt_reset_buffer(struct wt_callback *cb)
100 memset(cb->send_buf, 0, sizeof(cb->send_buf));
101 cb->send_buf_free = sizeof(cb->send_buf);
102 cb->send_buf_fill = 0;
103 cb->send_buf_init_time = cdtime();
106 static int wt_send_buffer(struct wt_callback *cb)
110 status = swrite(cb->sock_fd, cb->send_buf, strlen(cb->send_buf));
114 ERROR("write_tsdb plugin: send failed with status %zi (%s)",
115 status, sstrerror (errno, errbuf, sizeof (errbuf)));
126 /* NOTE: You must hold cb->send_lock when calling this function! */
127 static int wt_flush_nolock(cdtime_t timeout, struct wt_callback *cb)
131 DEBUG("write_tsdb plugin: wt_flush_nolock: timeout = %.3f; "
132 "send_buf_fill = %zu;",
136 /* timeout == 0 => flush unconditionally */
142 if ((cb->send_buf_init_time + timeout) > now)
146 if (cb->send_buf_fill <= 0)
148 cb->send_buf_init_time = cdtime();
152 status = wt_send_buffer(cb);
158 static int wt_callback_init(struct wt_callback *cb)
160 struct addrinfo ai_hints;
161 struct addrinfo *ai_list;
162 struct addrinfo *ai_ptr;
165 const char *node = cb->node ? cb->node : WT_DEFAULT_NODE;
166 const char *service = cb->service ? cb->service : WT_DEFAULT_SERVICE;
171 memset(&ai_hints, 0, sizeof(ai_hints));
173 ai_hints.ai_flags |= AI_ADDRCONFIG;
175 ai_hints.ai_family = AF_UNSPEC;
176 ai_hints.ai_socktype = SOCK_STREAM;
180 status = getaddrinfo(node, service, &ai_hints, &ai_list);
183 ERROR("write_tsdb plugin: getaddrinfo (%s, %s) failed: %s",
184 node, service, gai_strerror (status));
188 assert (ai_list != NULL);
189 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
191 cb->sock_fd = socket(ai_ptr->ai_family, ai_ptr->ai_socktype,
192 ai_ptr->ai_protocol);
196 status = connect(cb->sock_fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
207 freeaddrinfo(ai_list);
212 ERROR("write_tsdb plugin: Connecting to %s:%s failed. "
213 "The last error was: %s", node, service,
214 sstrerror (errno, errbuf, sizeof(errbuf)));
224 static void wt_callback_free(void *data)
226 struct wt_callback *cb;
233 pthread_mutex_lock(&cb->send_lock);
235 wt_flush_nolock(0, cb);
242 sfree(cb->host_tags);
244 pthread_mutex_destroy(&cb->send_lock);
249 static int wt_flush(cdtime_t timeout,
250 const char *identifier __attribute__((unused)),
251 user_data_t *user_data)
253 struct wt_callback *cb;
256 if (user_data == NULL)
259 cb = user_data->data;
261 pthread_mutex_lock(&cb->send_lock);
265 status = wt_callback_init(cb);
268 ERROR("write_tsdb plugin: wt_callback_init failed.");
269 pthread_mutex_unlock(&cb->send_lock);
274 status = wt_flush_nolock(timeout, cb);
275 pthread_mutex_unlock(&cb->send_lock);
280 static int wt_format_values(char *ret, size_t ret_len,
281 int ds_num, const data_set_t *ds,
282 const value_list_t *vl,
287 gauge_t *rates = NULL;
289 assert(0 == strcmp (ds->type, vl->type));
291 memset(ret, 0, ret_len);
293 #define BUFFER_ADD(...) do { \
294 status = ssnprintf (ret + offset, ret_len - offset, \
301 else if (((size_t) status) >= (ret_len - offset)) \
307 offset += ((size_t) status); \
310 if (ds->ds[ds_num].type == DS_TYPE_GAUGE)
311 BUFFER_ADD(GAUGE_FORMAT, vl->values[ds_num].gauge);
312 else if (store_rates)
315 rates = uc_get_rate (ds, vl);
318 WARNING("format_values: "
319 "uc_get_rate failed.");
322 BUFFER_ADD(GAUGE_FORMAT, rates[ds_num]);
324 else if (ds->ds[ds_num].type == DS_TYPE_COUNTER)
325 BUFFER_ADD("%llu", vl->values[ds_num].counter);
326 else if (ds->ds[ds_num].type == DS_TYPE_DERIVE)
327 BUFFER_ADD("%" PRIi64, vl->values[ds_num].derive);
328 else if (ds->ds[ds_num].type == DS_TYPE_ABSOLUTE)
329 BUFFER_ADD("%" PRIu64, vl->values[ds_num].absolute);
332 ERROR("format_values plugin: Unknown data source type: %i",
333 ds->ds[ds_num].type);
344 static int wt_format_name(char *ret, int ret_len,
345 const value_list_t *vl,
346 const struct wt_callback *cb,
352 const char *meta_prefix = "tsdb_prefix";
355 status = meta_data_get_string(vl->meta, meta_prefix, &temp);
356 if (status == -ENOENT) {
357 /* defaults to empty string */
358 } else if (status < 0) {
366 if (ds_name != NULL) {
367 if (vl->plugin_instance[0] == '\0') {
368 if (vl->type_instance[0] == '\0') {
369 ssnprintf(ret, ret_len, "%s%s.%s.%s", prefix, vl->plugin,
372 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s", prefix, vl->plugin,
373 vl->type, vl->type_instance, ds_name);
375 } else { /* vl->plugin_instance != "" */
376 if (vl->type_instance[0] == '\0') {
377 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s", prefix, vl->plugin,
378 vl->plugin_instance, vl->type, ds_name);
380 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s.%s", prefix,
381 vl->plugin, vl->plugin_instance, vl->type,
382 vl->type_instance, ds_name);
385 } else { /* ds_name == NULL */
386 if (vl->plugin_instance[0] == '\0') {
387 if (vl->type_instance[0] == '\0') {
388 ssnprintf(ret, ret_len, "%s%s.%s", prefix, vl->plugin,
391 ssnprintf(ret, ret_len, "%s%s.%s.%s", prefix, vl->plugin,
392 vl->type_instance, vl->type);
394 } else { /* vl->plugin_instance != "" */
395 if (vl->type_instance[0] == '\0') {
396 ssnprintf(ret, ret_len, "%s%s.%s.%s", prefix, vl->plugin,
397 vl->plugin_instance, vl->type);
399 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s", prefix, vl->plugin,
400 vl->plugin_instance, vl->type, vl->type_instance);
409 static int wt_send_message (const char* key, const char* value,
410 cdtime_t time, struct wt_callback *cb,
411 const char* host, meta_data_t *md)
418 char *host_tags = cb->host_tags ? cb->host_tags : "";
419 const char *meta_tsdb = "tsdb_tags";
421 /* skip if value is NaN */
426 status = meta_data_get_string(md, meta_tsdb, &temp);
427 if (status == -ENOENT) {
428 /* defaults to empty string */
429 } else if (status < 0) {
430 ERROR("write_tsdb plugin: tags metadata get failure");
432 pthread_mutex_unlock(&cb->send_lock);
439 status = ssnprintf (message,
441 "put %s %.0f %s fqdn=%s %s %s\r\n",
443 CDTIME_T_TO_DOUBLE(time),
451 message_len = (size_t) status;
453 if (message_len >= sizeof(message)) {
454 ERROR("write_tsdb plugin: message buffer too small: "
455 "Need %zu bytes.", message_len + 1);
459 pthread_mutex_lock(&cb->send_lock);
463 status = wt_callback_init(cb);
466 ERROR("write_tsdb plugin: wt_callback_init failed.");
467 pthread_mutex_unlock(&cb->send_lock);
472 if (message_len >= cb->send_buf_free)
474 status = wt_flush_nolock(0, cb);
477 pthread_mutex_unlock(&cb->send_lock);
482 /* Assert that we have enough space for this message. */
483 assert(message_len < cb->send_buf_free);
485 /* `message_len + 1' because `message_len' does not include the
486 * trailing null byte. Neither does `send_buffer_fill'. */
487 memcpy(cb->send_buf + cb->send_buf_fill,
488 message, message_len + 1);
489 cb->send_buf_fill += message_len;
490 cb->send_buf_free -= message_len;
492 DEBUG("write_tsdb plugin: [%s]:%s buf %zu/%zu (%.1f %%) \"%s\"",
495 cb->send_buf_fill, sizeof(cb->send_buf),
496 100.0 * ((double) cb->send_buf_fill) /
497 ((double) sizeof(cb->send_buf)),
500 pthread_mutex_unlock(&cb->send_lock);
505 static int wt_write_messages(const data_set_t *ds, const value_list_t *vl,
506 struct wt_callback *cb)
508 char key[10*DATA_MAX_NAME_LEN];
514 if (0 != strcmp(ds->type, vl->type))
516 ERROR("write_tsdb plugin: DS type does not match "
521 for (i = 0; i < ds->ds_num; i++)
523 const char *ds_name = NULL;
525 if (cb->always_append_ds || (ds->ds_num > 1))
526 ds_name = ds->ds[i].name;
528 /* Copy the identifier to 'key' and escape it. */
529 status = wt_format_name(key, sizeof(key), vl, cb, ds_name);
532 ERROR("write_tsdb plugin: error with format_name");
536 escape_string(key, sizeof(key));
537 /* Convert the values to an ASCII representation and put that into
539 status = wt_format_values(values, sizeof(values), i, ds, vl,
543 ERROR("write_tsdb plugin: error with "
548 /* Send the message to tsdb */
549 status = wt_send_message(key, values, vl->time, cb, vl->host, vl->meta);
552 ERROR("write_tsdb plugin: error with "
561 static int wt_write(const data_set_t *ds, const value_list_t *vl,
562 user_data_t *user_data)
564 struct wt_callback *cb;
567 if (user_data == NULL)
570 cb = user_data->data;
572 status = wt_write_messages(ds, vl, cb);
577 static int wt_config_tsd(oconfig_item_t *ci)
579 struct wt_callback *cb;
580 user_data_t user_data;
581 char callback_name[DATA_MAX_NAME_LEN];
584 cb = malloc(sizeof(*cb));
587 ERROR("write_tsdb plugin: malloc failed.");
590 memset(cb, 0, sizeof(*cb));
594 cb->host_tags = NULL;
597 pthread_mutex_init (&cb->send_lock, NULL);
599 for (i = 0; i < ci->children_num; i++)
601 oconfig_item_t *child = ci->children + i;
603 if (strcasecmp("Host", child->key) == 0)
604 cf_util_get_string(child, &cb->node);
605 else if (strcasecmp("Port", child->key) == 0)
606 cf_util_get_service(child, &cb->service);
607 else if (strcasecmp("HostTags", child->key) == 0)
608 cf_util_get_string(child, &cb->host_tags);
609 else if (strcasecmp("StoreRates", child->key) == 0)
610 cf_util_get_boolean(child, &cb->store_rates);
611 else if (strcasecmp("AlwaysAppendDS", child->key) == 0)
612 cf_util_get_boolean(child, &cb->always_append_ds);
615 ERROR("write_tsdb plugin: Invalid configuration "
616 "option: %s.", child->key);
620 ssnprintf(callback_name, sizeof(callback_name), "write_tsdb/%s/%s",
621 cb->node != NULL ? cb->node : WT_DEFAULT_NODE,
622 cb->service != NULL ? cb->service : WT_DEFAULT_SERVICE);
624 memset(&user_data, 0, sizeof(user_data));
626 user_data.free_func = wt_callback_free;
627 plugin_register_write(callback_name, wt_write, &user_data);
629 user_data.free_func = NULL;
630 plugin_register_flush(callback_name, wt_flush, &user_data);
635 static int wt_config(oconfig_item_t *ci)
639 for (i = 0; i < ci->children_num; i++)
641 oconfig_item_t *child = ci->children + i;
643 if (strcasecmp("Node", child->key) == 0)
644 wt_config_tsd(child);
647 ERROR("write_tsdb plugin: Invalid configuration "
648 "option: %s.", child->key);
655 void module_register(void)
657 plugin_register_complex_config("write_tsdb", wt_config);
660 /* vim: set sw=4 ts=4 sts=4 tw=78 et : */