7a8f851f285398bfb504bb02e72bf78b0a4ad3c2
1 /**
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.
12 *
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.
17 *
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
21 *
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>
28 * write_tsdb Authors:
29 * Brett Hawn <bhawn at llnw.com>
30 * Kevin Bowling <kbowling@llnw.com>
31 **/
33 /* write_tsdb plugin configuation example
34 *
35 * <Plugin write_tsdb>
36 * <Node>
37 * Host "localhost"
38 * Port "4242"
39 * HostTags "status=production deviceclass=www"
40 * </Node>
41 * </Plugin>
42 */
44 #include "collectd.h"
45 #include "common.h"
46 #include "plugin.h"
47 #include "configfile.h"
49 #include "utils_cache.h"
51 #include <netdb.h>
53 #ifndef WT_DEFAULT_NODE
54 # define WT_DEFAULT_NODE "localhost"
55 #endif
57 #ifndef WT_DEFAULT_SERVICE
58 # define WT_DEFAULT_SERVICE "4242"
59 #endif
61 #ifndef WT_DEFAULT_ESCAPE
62 # define WT_DEFAULT_ESCAPE '.'
63 #endif
65 /* Ethernet - (IPv6 + TCP) = 1500 - (40 + 32) = 1428 */
66 #ifndef WT_SEND_BUF_SIZE
67 # define WT_SEND_BUF_SIZE 1428
68 #endif
70 /*
71 * Private variables
72 */
73 struct wt_callback
74 {
75 int sock_fd;
77 char *node;
78 char *service;
79 char *host_tags;
81 _Bool store_rates;
82 _Bool always_append_ds;
84 char send_buf[WT_SEND_BUF_SIZE];
85 size_t send_buf_free;
86 size_t send_buf_fill;
87 cdtime_t send_buf_init_time;
89 pthread_mutex_t send_lock;
90 };
93 /*
94 * Functions
95 */
96 static void wt_reset_buffer(struct wt_callback *cb)
97 {
98 memset(cb->send_buf, 0, sizeof(cb->send_buf));
99 cb->send_buf_free = sizeof(cb->send_buf);
100 cb->send_buf_fill = 0;
101 cb->send_buf_init_time = cdtime();
102 }
104 static int wt_send_buffer(struct wt_callback *cb)
105 {
106 ssize_t status = 0;
108 status = swrite(cb->sock_fd, cb->send_buf, strlen(cb->send_buf));
109 if (status < 0)
110 {
111 char errbuf[1024];
112 ERROR("write_tsdb plugin: send failed with status %zi (%s)",
113 status, sstrerror (errno, errbuf, sizeof (errbuf)));
115 close (cb->sock_fd);
116 cb->sock_fd = -1;
118 return -1;
119 }
121 return 0;
122 }
124 /* NOTE: You must hold cb->send_lock when calling this function! */
125 static int wt_flush_nolock(cdtime_t timeout, struct wt_callback *cb)
126 {
127 int status;
129 DEBUG("write_tsdb plugin: wt_flush_nolock: timeout = %.3f; "
130 "send_buf_fill = %zu;",
131 (double)timeout,
132 cb->send_buf_fill);
134 /* timeout == 0 => flush unconditionally */
135 if (timeout > 0)
136 {
137 cdtime_t now;
139 now = cdtime();
140 if ((cb->send_buf_init_time + timeout) > now)
141 return 0;
142 }
144 if (cb->send_buf_fill == 0)
145 {
146 cb->send_buf_init_time = cdtime();
147 return 0;
148 }
150 status = wt_send_buffer(cb);
151 wt_reset_buffer(cb);
153 return status;
154 }
156 static int wt_callback_init(struct wt_callback *cb)
157 {
158 struct addrinfo ai_hints = { 0 };
159 struct addrinfo *ai_list;
160 struct addrinfo *ai_ptr;
161 int status;
163 const char *node = cb->node ? cb->node : WT_DEFAULT_NODE;
164 const char *service = cb->service ? cb->service : WT_DEFAULT_SERVICE;
166 if (cb->sock_fd > 0)
167 return 0;
169 ai_hints.ai_flags = AI_ADDRCONFIG;
170 ai_hints.ai_family = AF_UNSPEC;
171 ai_hints.ai_socktype = SOCK_STREAM;
173 ai_list = NULL;
175 status = getaddrinfo(node, service, &ai_hints, &ai_list);
176 if (status != 0)
177 {
178 ERROR("write_tsdb plugin: getaddrinfo (%s, %s) failed: %s",
179 node, service, gai_strerror (status));
180 return -1;
181 }
183 assert (ai_list != NULL);
184 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
185 {
186 cb->sock_fd = socket(ai_ptr->ai_family, ai_ptr->ai_socktype,
187 ai_ptr->ai_protocol);
188 if (cb->sock_fd < 0)
189 continue;
191 status = connect(cb->sock_fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
192 if (status != 0)
193 {
194 close(cb->sock_fd);
195 cb->sock_fd = -1;
196 continue;
197 }
199 break;
200 }
202 freeaddrinfo(ai_list);
204 if (cb->sock_fd < 0)
205 {
206 char errbuf[1024];
207 ERROR("write_tsdb plugin: Connecting to %s:%s failed. "
208 "The last error was: %s", node, service,
209 sstrerror (errno, errbuf, sizeof(errbuf)));
210 return -1;
211 }
213 wt_reset_buffer(cb);
215 return 0;
216 }
218 static void wt_callback_free(void *data)
219 {
220 struct wt_callback *cb;
222 if (data == NULL)
223 return;
225 cb = data;
227 pthread_mutex_lock(&cb->send_lock);
229 wt_flush_nolock(0, cb);
231 close(cb->sock_fd);
232 cb->sock_fd = -1;
234 sfree(cb->node);
235 sfree(cb->service);
236 sfree(cb->host_tags);
238 pthread_mutex_destroy(&cb->send_lock);
240 sfree(cb);
241 }
243 static int wt_flush(cdtime_t timeout,
244 const char *identifier __attribute__((unused)),
245 user_data_t *user_data)
246 {
247 struct wt_callback *cb;
248 int status;
250 if (user_data == NULL)
251 return -EINVAL;
253 cb = user_data->data;
255 pthread_mutex_lock(&cb->send_lock);
257 if (cb->sock_fd < 0)
258 {
259 status = wt_callback_init(cb);
260 if (status != 0)
261 {
262 ERROR("write_tsdb plugin: wt_callback_init failed.");
263 pthread_mutex_unlock(&cb->send_lock);
264 return -1;
265 }
266 }
268 status = wt_flush_nolock(timeout, cb);
269 pthread_mutex_unlock(&cb->send_lock);
271 return status;
272 }
274 static int wt_format_values(char *ret, size_t ret_len,
275 int ds_num, const data_set_t *ds,
276 const value_list_t *vl,
277 _Bool store_rates)
278 {
279 size_t offset = 0;
280 int status;
281 gauge_t *rates = NULL;
283 assert(0 == strcmp (ds->type, vl->type));
285 memset(ret, 0, ret_len);
287 #define BUFFER_ADD(...) do { \
288 status = ssnprintf (ret + offset, ret_len - offset, \
289 __VA_ARGS__); \
290 if (status < 1) \
291 { \
292 sfree(rates); \
293 return -1; \
294 } \
295 else if (((size_t) status) >= (ret_len - offset)) \
296 { \
297 sfree(rates); \
298 return -1; \
299 } \
300 else \
301 offset += ((size_t) status); \
302 } while (0)
304 if (ds->ds[ds_num].type == DS_TYPE_GAUGE)
305 BUFFER_ADD(GAUGE_FORMAT, vl->values[ds_num].gauge);
306 else if (store_rates)
307 {
308 if (rates == NULL)
309 rates = uc_get_rate (ds, vl);
310 if (rates == NULL)
311 {
312 WARNING("format_values: "
313 "uc_get_rate failed.");
314 return -1;
315 }
316 BUFFER_ADD(GAUGE_FORMAT, rates[ds_num]);
317 }
318 else if (ds->ds[ds_num].type == DS_TYPE_COUNTER)
319 BUFFER_ADD("%llu", vl->values[ds_num].counter);
320 else if (ds->ds[ds_num].type == DS_TYPE_DERIVE)
321 BUFFER_ADD("%" PRIi64, vl->values[ds_num].derive);
322 else if (ds->ds[ds_num].type == DS_TYPE_ABSOLUTE)
323 BUFFER_ADD("%" PRIu64, vl->values[ds_num].absolute);
324 else
325 {
326 ERROR("format_values plugin: Unknown data source type: %i",
327 ds->ds[ds_num].type);
328 sfree(rates);
329 return -1;
330 }
332 #undef BUFFER_ADD
334 sfree(rates);
335 return 0;
336 }
338 static int wt_format_name(char *ret, int ret_len,
339 const value_list_t *vl,
340 const struct wt_callback *cb,
341 const char *ds_name)
342 {
343 int status;
344 char *temp = NULL;
345 const char *prefix = "";
346 const char *meta_prefix = "tsdb_prefix";
348 if (vl->meta) {
349 status = meta_data_get_string(vl->meta, meta_prefix, &temp);
350 if (status == -ENOENT) {
351 /* defaults to empty string */
352 } else if (status < 0) {
353 sfree(temp);
354 return status;
355 } else {
356 prefix = temp;
357 }
358 }
360 if (ds_name != NULL) {
361 if (vl->plugin_instance[0] == '\0') {
362 if (vl->type_instance[0] == '\0') {
363 ssnprintf(ret, ret_len, "%s%s.%s.%s", prefix, vl->plugin,
364 vl->type, ds_name);
365 } else {
366 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s", prefix, vl->plugin,
367 vl->type, vl->type_instance, ds_name);
368 }
369 } else { /* vl->plugin_instance != "" */
370 if (vl->type_instance[0] == '\0') {
371 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s", prefix, vl->plugin,
372 vl->plugin_instance, vl->type, ds_name);
373 } else {
374 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s.%s", prefix,
375 vl->plugin, vl->plugin_instance, vl->type,
376 vl->type_instance, ds_name);
377 }
378 }
379 } else { /* ds_name == NULL */
380 if (vl->plugin_instance[0] == '\0') {
381 if (vl->type_instance[0] == '\0') {
382 ssnprintf(ret, ret_len, "%s%s.%s", prefix, vl->plugin,
383 vl->type);
384 } else {
385 ssnprintf(ret, ret_len, "%s%s.%s.%s", prefix, vl->plugin,
386 vl->type_instance, vl->type);
387 }
388 } else { /* vl->plugin_instance != "" */
389 if (vl->type_instance[0] == '\0') {
390 ssnprintf(ret, ret_len, "%s%s.%s.%s", prefix, vl->plugin,
391 vl->plugin_instance, vl->type);
392 } else {
393 ssnprintf(ret, ret_len, "%s%s.%s.%s.%s", prefix, vl->plugin,
394 vl->plugin_instance, vl->type, vl->type_instance);
395 }
396 }
397 }
399 sfree(temp);
400 return 0;
401 }
403 static int wt_send_message (const char* key, const char* value,
404 cdtime_t time, struct wt_callback *cb,
405 const char* host, meta_data_t *md)
406 {
407 int status;
408 size_t message_len;
409 char *temp = NULL;
410 const char *tags = "";
411 char message[1024];
412 const char *host_tags = cb->host_tags ? cb->host_tags : "";
413 const char *meta_tsdb = "tsdb_tags";
415 /* skip if value is NaN */
416 if (value[0] == 'n')
417 return 0;
419 if (md) {
420 status = meta_data_get_string(md, meta_tsdb, &temp);
421 if (status == -ENOENT) {
422 /* defaults to empty string */
423 } else if (status < 0) {
424 ERROR("write_tsdb plugin: tags metadata get failure");
425 sfree(temp);
426 pthread_mutex_unlock(&cb->send_lock);
427 return status;
428 } else {
429 tags = temp;
430 }
431 }
433 status = ssnprintf (message,
434 sizeof(message),
435 "put %s %.0f %s fqdn=%s %s %s\r\n",
436 key,
437 CDTIME_T_TO_DOUBLE(time),
438 value,
439 host,
440 tags,
441 host_tags);
442 sfree(temp);
443 if (status < 0)
444 return -1;
445 message_len = (size_t) status;
447 if (message_len >= sizeof(message)) {
448 ERROR("write_tsdb plugin: message buffer too small: "
449 "Need %zu bytes.", message_len + 1);
450 return -1;
451 }
453 pthread_mutex_lock(&cb->send_lock);
455 if (cb->sock_fd < 0)
456 {
457 status = wt_callback_init(cb);
458 if (status != 0)
459 {
460 ERROR("write_tsdb plugin: wt_callback_init failed.");
461 pthread_mutex_unlock(&cb->send_lock);
462 return -1;
463 }
464 }
466 if (message_len >= cb->send_buf_free)
467 {
468 status = wt_flush_nolock(0, cb);
469 if (status != 0)
470 {
471 pthread_mutex_unlock(&cb->send_lock);
472 return status;
473 }
474 }
476 /* Assert that we have enough space for this message. */
477 assert(message_len < cb->send_buf_free);
479 /* `message_len + 1' because `message_len' does not include the
480 * trailing null byte. Neither does `send_buffer_fill'. */
481 memcpy(cb->send_buf + cb->send_buf_fill,
482 message, message_len + 1);
483 cb->send_buf_fill += message_len;
484 cb->send_buf_free -= message_len;
486 DEBUG("write_tsdb plugin: [%s]:%s buf %zu/%zu (%.1f %%) \"%s\"",
487 cb->node,
488 cb->service,
489 cb->send_buf_fill, sizeof(cb->send_buf),
490 100.0 * ((double) cb->send_buf_fill) /
491 ((double) sizeof(cb->send_buf)),
492 message);
494 pthread_mutex_unlock(&cb->send_lock);
496 return 0;
497 }
499 static int wt_write_messages(const data_set_t *ds, const value_list_t *vl,
500 struct wt_callback *cb)
501 {
502 char key[10*DATA_MAX_NAME_LEN];
503 char values[512];
505 int status;
506 size_t i;
508 if (0 != strcmp(ds->type, vl->type))
509 {
510 ERROR("write_tsdb plugin: DS type does not match "
511 "value list type");
512 return -1;
513 }
515 for (i = 0; i < ds->ds_num; i++)
516 {
517 const char *ds_name = NULL;
519 if (cb->always_append_ds || (ds->ds_num > 1))
520 ds_name = ds->ds[i].name;
522 /* Copy the identifier to 'key' and escape it. */
523 status = wt_format_name(key, sizeof(key), vl, cb, ds_name);
524 if (status != 0)
525 {
526 ERROR("write_tsdb plugin: error with format_name");
527 return status;
528 }
530 escape_string(key, sizeof(key));
531 /* Convert the values to an ASCII representation and put that into
532 * 'values'. */
533 status = wt_format_values(values, sizeof(values), i, ds, vl,
534 cb->store_rates);
535 if (status != 0)
536 {
537 ERROR("write_tsdb plugin: error with "
538 "wt_format_values");
539 return status;
540 }
542 /* Send the message to tsdb */
543 status = wt_send_message(key, values, vl->time, cb, vl->host, vl->meta);
544 if (status != 0)
545 {
546 ERROR("write_tsdb plugin: error with "
547 "wt_send_message");
548 return status;
549 }
550 }
552 return 0;
553 }
555 static int wt_write(const data_set_t *ds, const value_list_t *vl,
556 user_data_t *user_data)
557 {
558 struct wt_callback *cb;
559 int status;
561 if (user_data == NULL)
562 return EINVAL;
564 cb = user_data->data;
566 status = wt_write_messages(ds, vl, cb);
568 return status;
569 }
571 static int wt_config_tsd(oconfig_item_t *ci)
572 {
573 struct wt_callback *cb;
574 user_data_t user_data = { 0 };
575 char callback_name[DATA_MAX_NAME_LEN];
576 int i;
578 cb = calloc(1, sizeof(*cb));
579 if (cb == NULL)
580 {
581 ERROR("write_tsdb plugin: calloc failed.");
582 return -1;
583 }
584 cb->sock_fd = -1;
585 cb->node = NULL;
586 cb->service = NULL;
587 cb->host_tags = NULL;
588 cb->store_rates = 0;
590 pthread_mutex_init (&cb->send_lock, NULL);
592 for (i = 0; i < ci->children_num; i++)
593 {
594 oconfig_item_t *child = ci->children + i;
596 if (strcasecmp("Host", child->key) == 0)
597 cf_util_get_string(child, &cb->node);
598 else if (strcasecmp("Port", child->key) == 0)
599 cf_util_get_service(child, &cb->service);
600 else if (strcasecmp("HostTags", child->key) == 0)
601 cf_util_get_string(child, &cb->host_tags);
602 else if (strcasecmp("StoreRates", child->key) == 0)
603 cf_util_get_boolean(child, &cb->store_rates);
604 else if (strcasecmp("AlwaysAppendDS", child->key) == 0)
605 cf_util_get_boolean(child, &cb->always_append_ds);
606 else
607 {
608 ERROR("write_tsdb plugin: Invalid configuration "
609 "option: %s.", child->key);
610 }
611 }
613 ssnprintf(callback_name, sizeof(callback_name), "write_tsdb/%s/%s",
614 cb->node != NULL ? cb->node : WT_DEFAULT_NODE,
615 cb->service != NULL ? cb->service : WT_DEFAULT_SERVICE);
617 user_data.data = cb;
618 user_data.free_func = wt_callback_free;
619 plugin_register_write(callback_name, wt_write, &user_data);
621 user_data.free_func = NULL;
622 plugin_register_flush(callback_name, wt_flush, &user_data);
624 return 0;
625 }
627 static int wt_config(oconfig_item_t *ci)
628 {
629 int i;
631 for (i = 0; i < ci->children_num; i++)
632 {
633 oconfig_item_t *child = ci->children + i;
635 if (strcasecmp("Node", child->key) == 0)
636 wt_config_tsd(child);
637 else
638 {
639 ERROR("write_tsdb plugin: Invalid configuration "
640 "option: %s.", child->key);
641 }
642 }
644 return 0;
645 }
647 void module_register(void)
648 {
649 plugin_register_complex_config("write_tsdb", wt_config);
650 }
652 /* vim: set sw=4 ts=4 sts=4 tw=78 et : */