7336d37ac2a413479329636fec5ae313755c0032
1 /**
2 * collectd - src/statsd.c
3 *
4 * Copyright (C) 2013 Florian octo Forster
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 *
18 * Authors:
19 * Florian octo Forster <octo at collectd.org>
20 */
22 #include "collectd.h"
23 #include "plugin.h"
24 #include "common.h"
25 #include "configfile.h"
26 #include "utils_avltree.h"
27 #include "utils_complain.h"
28 #include "utils_latency.h"
30 #include <pthread.h>
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <netdb.h>
35 #include <poll.h>
37 /* AIX doesn't have MSG_DONTWAIT */
38 #ifndef MSG_DONTWAIT
39 # define MSG_DONTWAIT MSG_NONBLOCK
40 #endif
42 #ifndef STATSD_DEFAULT_NODE
43 # define STATSD_DEFAULT_NODE NULL
44 #endif
46 #ifndef STATSD_DEFAULT_SERVICE
47 # define STATSD_DEFAULT_SERVICE "8125"
48 #endif
50 enum metric_type_e
51 {
52 STATSD_COUNTER,
53 STATSD_TIMER,
54 STATSD_GAUGE,
55 STATSD_SET
56 };
57 typedef enum metric_type_e metric_type_t;
59 struct statsd_metric_s
60 {
61 metric_type_t type;
62 double value;
63 latency_counter_t *latency;
64 c_avl_tree_t *set;
65 unsigned long updates_num;
66 };
67 typedef struct statsd_metric_s statsd_metric_t;
69 static c_avl_tree_t *metrics_tree = NULL;
70 static pthread_mutex_t metrics_lock = PTHREAD_MUTEX_INITIALIZER;
72 static pthread_t network_thread;
73 static _Bool network_thread_running = 0;
74 static _Bool network_thread_shutdown = 0;
76 static char *conf_node = NULL;
77 static char *conf_service = NULL;
79 static _Bool conf_delete_counters = 0;
80 static _Bool conf_delete_timers = 0;
81 static _Bool conf_delete_gauges = 0;
82 static _Bool conf_delete_sets = 0;
84 static double *conf_timer_percentile = NULL;
85 static size_t conf_timer_percentile_num = 0;
87 static _Bool conf_timer_lower = 0;
88 static _Bool conf_timer_upper = 0;
89 static _Bool conf_timer_sum = 0;
90 static _Bool conf_timer_count = 0;
92 /* Must hold metrics_lock when calling this function. */
93 static statsd_metric_t *statsd_metric_lookup_unsafe (char const *name, /* {{{ */
94 metric_type_t type)
95 {
96 char key[DATA_MAX_NAME_LEN + 2];
97 char *key_copy;
98 statsd_metric_t *metric;
99 int status;
101 switch (type)
102 {
103 case STATSD_COUNTER: key[0] = 'c'; break;
104 case STATSD_TIMER: key[0] = 't'; break;
105 case STATSD_GAUGE: key[0] = 'g'; break;
106 case STATSD_SET: key[0] = 's'; break;
107 default: return (NULL);
108 }
110 key[1] = ':';
111 sstrncpy (&key[2], name, sizeof (key) - 2);
113 status = c_avl_get (metrics_tree, key, (void *) &metric);
114 if (status == 0)
115 return (metric);
117 key_copy = strdup (key);
118 if (key_copy == NULL)
119 {
120 ERROR ("statsd plugin: strdup failed.");
121 return (NULL);
122 }
124 metric = malloc (sizeof (*metric));
125 if (metric == NULL)
126 {
127 ERROR ("statsd plugin: malloc failed.");
128 sfree (key_copy);
129 return (NULL);
130 }
131 memset (metric, 0, sizeof (*metric));
133 metric->type = type;
134 metric->latency = NULL;
135 metric->set = NULL;
137 status = c_avl_insert (metrics_tree, key_copy, metric);
138 if (status != 0)
139 {
140 ERROR ("statsd plugin: c_avl_insert failed.");
141 sfree (key_copy);
142 sfree (metric);
143 return (NULL);
144 }
146 return (metric);
147 } /* }}} statsd_metric_lookup_unsafe */
149 static int statsd_metric_set (char const *name, double value, /* {{{ */
150 metric_type_t type)
151 {
152 statsd_metric_t *metric;
154 pthread_mutex_lock (&metrics_lock);
156 metric = statsd_metric_lookup_unsafe (name, type);
157 if (metric == NULL)
158 {
159 pthread_mutex_unlock (&metrics_lock);
160 return (-1);
161 }
163 metric->value = value;
164 metric->updates_num++;
166 pthread_mutex_unlock (&metrics_lock);
168 return (0);
169 } /* }}} int statsd_metric_set */
171 static int statsd_metric_add (char const *name, double delta, /* {{{ */
172 metric_type_t type)
173 {
174 statsd_metric_t *metric;
176 pthread_mutex_lock (&metrics_lock);
178 metric = statsd_metric_lookup_unsafe (name, type);
179 if (metric == NULL)
180 {
181 pthread_mutex_unlock (&metrics_lock);
182 return (-1);
183 }
185 metric->value += delta;
186 metric->updates_num++;
188 pthread_mutex_unlock (&metrics_lock);
190 return (0);
191 } /* }}} int statsd_metric_add */
193 static void statsd_metric_free (statsd_metric_t *metric) /* {{{ */
194 {
195 if (metric == NULL)
196 return;
198 if (metric->latency != NULL)
199 {
200 latency_counter_destroy (metric->latency);
201 metric->latency = NULL;
202 }
204 if (metric->set != NULL)
205 {
206 void *key;
207 void *value;
209 while (c_avl_pick (metric->set, &key, &value) == 0)
210 {
211 sfree (key);
212 assert (value == NULL);
213 }
215 c_avl_destroy (metric->set);
216 metric->set = NULL;
217 }
219 sfree (metric);
220 } /* }}} void statsd_metric_free */
222 static int statsd_parse_value (char const *str, value_t *ret_value) /* {{{ */
223 {
224 char *endptr = NULL;
226 ret_value->gauge = (gauge_t) strtod (str, &endptr);
227 if ((str == endptr) || ((endptr != NULL) && (*endptr != 0)))
228 return (-1);
230 return (0);
231 } /* }}} int statsd_parse_value */
233 static int statsd_handle_counter (char const *name, /* {{{ */
234 char const *value_str,
235 char const *extra)
236 {
237 value_t value;
238 value_t scale;
239 int status;
241 if ((extra != NULL) && (extra[0] != '@'))
242 return (-1);
244 scale.gauge = 1.0;
245 if (extra != NULL)
246 {
247 status = statsd_parse_value (extra + 1, &scale);
248 if (status != 0)
249 return (status);
251 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
252 return (-1);
253 }
255 value.gauge = 1.0;
256 status = statsd_parse_value (value_str, &value);
257 if (status != 0)
258 return (status);
260 return (statsd_metric_add (name, (double) (value.gauge / scale.gauge),
261 STATSD_COUNTER));
262 } /* }}} int statsd_handle_counter */
264 static int statsd_handle_gauge (char const *name, /* {{{ */
265 char const *value_str)
266 {
267 value_t value;
268 int status;
270 value.gauge = 0;
271 status = statsd_parse_value (value_str, &value);
272 if (status != 0)
273 return (status);
275 if ((value_str[0] == '+') || (value_str[0] == '-'))
276 return (statsd_metric_add (name, (double) value.gauge, STATSD_GAUGE));
277 else
278 return (statsd_metric_set (name, (double) value.gauge, STATSD_GAUGE));
279 } /* }}} int statsd_handle_gauge */
281 static int statsd_handle_timer (char const *name, /* {{{ */
282 char const *value_str,
283 char const *extra)
284 {
285 statsd_metric_t *metric;
286 value_t value_ms;
287 value_t scale;
288 cdtime_t value;
289 int status;
291 if ((extra != NULL) && (extra[0] != '@'))
292 return (-1);
294 scale.gauge = 1.0;
295 if (extra != NULL)
296 {
297 status = statsd_parse_value (extra + 1, &scale);
298 if (status != 0)
299 return (status);
301 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
302 return (-1);
303 }
305 value_ms.derive = 0;
306 status = statsd_parse_value (value_str, &value_ms);
307 if (status != 0)
308 return (status);
310 value = MS_TO_CDTIME_T (value_ms.gauge / scale.gauge);
312 pthread_mutex_lock (&metrics_lock);
314 metric = statsd_metric_lookup_unsafe (name, STATSD_TIMER);
315 if (metric == NULL)
316 {
317 pthread_mutex_unlock (&metrics_lock);
318 return (-1);
319 }
321 if (metric->latency == NULL)
322 metric->latency = latency_counter_create ();
323 if (metric->latency == NULL)
324 {
325 pthread_mutex_unlock (&metrics_lock);
326 return (-1);
327 }
329 latency_counter_add (metric->latency, value);
330 metric->updates_num++;
332 pthread_mutex_unlock (&metrics_lock);
333 return (0);
334 } /* }}} int statsd_handle_timer */
336 static int statsd_handle_set (char const *name, /* {{{ */
337 char const *set_key_orig)
338 {
339 statsd_metric_t *metric = NULL;
340 char *set_key;
341 int status;
343 pthread_mutex_lock (&metrics_lock);
345 metric = statsd_metric_lookup_unsafe (name, STATSD_SET);
346 if (metric == NULL)
347 {
348 pthread_mutex_unlock (&metrics_lock);
349 return (-1);
350 }
352 /* Make sure metric->set exists. */
353 if (metric->set == NULL)
354 metric->set = c_avl_create ((void *) strcmp);
356 if (metric->set == NULL)
357 {
358 pthread_mutex_unlock (&metrics_lock);
359 ERROR ("statsd plugin: c_avl_create failed.");
360 return (-1);
361 }
363 set_key = strdup (set_key_orig);
364 if (set_key == NULL)
365 {
366 pthread_mutex_unlock (&metrics_lock);
367 ERROR ("statsd plugin: strdup failed.");
368 return (-1);
369 }
371 status = c_avl_insert (metric->set, set_key, /* value = */ NULL);
372 if (status < 0)
373 {
374 pthread_mutex_unlock (&metrics_lock);
375 if (status < 0)
376 ERROR ("statsd plugin: c_avl_insert (\"%s\") failed with status %i.",
377 set_key, status);
378 sfree (set_key);
379 return (-1);
380 }
381 else if (status > 0) /* key already exists */
382 {
383 sfree (set_key);
384 }
386 metric->updates_num++;
388 pthread_mutex_unlock (&metrics_lock);
389 return (0);
390 } /* }}} int statsd_handle_set */
392 static int statsd_parse_line (char *buffer) /* {{{ */
393 {
394 char *name = buffer;
395 char *value;
396 char *type;
397 char *extra;
399 type = strchr (name, '|');
400 if (type == NULL)
401 return (-1);
402 *type = 0;
403 type++;
405 value = strrchr (name, ':');
406 if (value == NULL)
407 return (-1);
408 *value = 0;
409 value++;
411 extra = strchr (type, '|');
412 if (extra != NULL)
413 {
414 *extra = 0;
415 extra++;
416 }
418 if (strcmp ("c", type) == 0)
419 return (statsd_handle_counter (name, value, extra));
420 else if (strcmp ("ms", type) == 0)
421 return (statsd_handle_timer (name, value, extra));
423 /* extra is only valid for counters and timers */
424 if (extra != NULL)
425 return (-1);
427 if (strcmp ("g", type) == 0)
428 return (statsd_handle_gauge (name, value));
429 else if (strcmp ("s", type) == 0)
430 return (statsd_handle_set (name, value));
431 else
432 return (-1);
433 } /* }}} void statsd_parse_line */
435 static void statsd_parse_buffer (char *buffer) /* {{{ */
436 {
437 while (buffer != NULL)
438 {
439 char orig[64];
440 char *next;
441 int status;
443 next = strchr (buffer, '\n');
444 if (next != NULL)
445 {
446 *next = 0;
447 next++;
448 }
450 if (*buffer == 0)
451 {
452 buffer = next;
453 continue;
454 }
456 sstrncpy (orig, buffer, sizeof (orig));
458 status = statsd_parse_line (buffer);
459 if (status != 0)
460 ERROR ("statsd plugin: Unable to parse line: \"%s\"", orig);
462 buffer = next;
463 }
464 } /* }}} void statsd_parse_buffer */
466 static void statsd_network_read (int fd) /* {{{ */
467 {
468 char buffer[4096];
469 size_t buffer_size;
470 ssize_t status;
472 status = recv (fd, buffer, sizeof (buffer), /* flags = */ MSG_DONTWAIT);
473 if (status < 0)
474 {
475 char errbuf[1024];
477 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
478 return;
480 ERROR ("statsd plugin: recv(2) failed: %s",
481 sstrerror (errno, errbuf, sizeof (errbuf)));
482 return;
483 }
485 buffer_size = (size_t) status;
486 if (buffer_size >= sizeof (buffer))
487 buffer_size = sizeof (buffer) - 1;
488 buffer[buffer_size] = 0;
490 statsd_parse_buffer (buffer);
491 } /* }}} void statsd_network_read */
493 static int statsd_network_init (struct pollfd **ret_fds, /* {{{ */
494 size_t *ret_fds_num)
495 {
496 struct pollfd *fds = NULL;
497 size_t fds_num = 0;
499 struct addrinfo ai_hints;
500 struct addrinfo *ai_list = NULL;
501 struct addrinfo *ai_ptr;
502 int status;
504 char const *node = (conf_node != NULL) ? conf_node : STATSD_DEFAULT_NODE;
505 char const *service = (conf_service != NULL)
506 ? conf_service : STATSD_DEFAULT_SERVICE;
508 memset (&ai_hints, 0, sizeof (ai_hints));
509 ai_hints.ai_flags = AI_PASSIVE;
510 #ifdef AI_ADDRCONFIG
511 ai_hints.ai_flags |= AI_ADDRCONFIG;
512 #endif
513 ai_hints.ai_family = AF_UNSPEC;
514 ai_hints.ai_socktype = SOCK_DGRAM;
516 status = getaddrinfo (node, service, &ai_hints, &ai_list);
517 if (status != 0)
518 {
519 ERROR ("statsd plugin: getaddrinfo (\"%s\", \"%s\") failed: %s",
520 node, service, gai_strerror (status));
521 return (status);
522 }
524 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
525 {
526 int fd;
527 struct pollfd *tmp;
529 char dbg_node[NI_MAXHOST];
530 char dbg_service[NI_MAXSERV];
532 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
533 if (fd < 0)
534 {
535 char errbuf[1024];
536 ERROR ("statsd plugin: socket(2) failed: %s",
537 sstrerror (errno, errbuf, sizeof (errbuf)));
538 continue;
539 }
541 getnameinfo (ai_ptr->ai_addr, ai_ptr->ai_addrlen,
542 dbg_node, sizeof (dbg_node), dbg_service, sizeof (dbg_service),
543 NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV);
544 DEBUG ("statsd plugin: Trying to bind to [%s]:%s ...", dbg_node, dbg_service);
546 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
547 if (status != 0)
548 {
549 char errbuf[1024];
550 ERROR ("statsd plugin: bind(2) failed: %s",
551 sstrerror (errno, errbuf, sizeof (errbuf)));
552 close (fd);
553 continue;
554 }
556 tmp = realloc (fds, sizeof (*fds) * (fds_num + 1));
557 if (tmp == NULL)
558 {
559 ERROR ("statsd plugin: realloc failed.");
560 close (fd);
561 continue;
562 }
563 fds = tmp;
564 tmp = fds + fds_num;
565 fds_num++;
567 memset (tmp, 0, sizeof (*tmp));
568 tmp->fd = fd;
569 tmp->events = POLLIN | POLLPRI;
570 }
572 freeaddrinfo (ai_list);
574 if (fds_num == 0)
575 {
576 ERROR ("statsd plugin: Unable to create listening socket for [%s]:%s.",
577 (node != NULL) ? node : "::", service);
578 return (ENOENT);
579 }
581 *ret_fds = fds;
582 *ret_fds_num = fds_num;
583 return (0);
584 } /* }}} int statsd_network_init */
586 static void *statsd_network_thread (void *args) /* {{{ */
587 {
588 struct pollfd *fds = NULL;
589 size_t fds_num = 0;
590 int status;
591 size_t i;
593 status = statsd_network_init (&fds, &fds_num);
594 if (status != 0)
595 {
596 ERROR ("statsd plugin: Unable to open listening sockets.");
597 pthread_exit ((void *) 0);
598 }
600 while (!network_thread_shutdown)
601 {
602 status = poll (fds, (nfds_t) fds_num, /* timeout = */ -1);
603 if (status < 0)
604 {
605 char errbuf[1024];
607 if ((errno == EINTR) || (errno == EAGAIN))
608 continue;
610 ERROR ("statsd plugin: poll(2) failed: %s",
611 sstrerror (errno, errbuf, sizeof (errbuf)));
612 break;
613 }
615 for (i = 0; i < fds_num; i++)
616 {
617 if ((fds[i].revents & (POLLIN | POLLPRI)) == 0)
618 continue;
620 statsd_network_read (fds[i].fd);
621 fds[i].revents = 0;
622 }
623 } /* while (!network_thread_shutdown) */
625 /* Clean up */
626 for (i = 0; i < fds_num; i++)
627 close (fds[i].fd);
628 sfree (fds);
630 return ((void *) 0);
631 } /* }}} void *statsd_network_thread */
633 static int statsd_config_timer_percentile (oconfig_item_t *ci) /* {{{ */
634 {
635 double percent = NAN;
636 double *tmp;
637 int status;
639 status = cf_util_get_double (ci, &percent);
640 if (status != 0)
641 return (status);
643 if ((percent <= 0.0) || (percent >= 100))
644 {
645 ERROR ("statsd plugin: The value for \"%s\" must be between 0 and 100, "
646 "exclusively.", ci->key);
647 return (ERANGE);
648 }
650 tmp = realloc (conf_timer_percentile,
651 sizeof (*conf_timer_percentile) * (conf_timer_percentile_num + 1));
652 if (tmp == NULL)
653 {
654 ERROR ("statsd plugin: realloc failed.");
655 return (ENOMEM);
656 }
657 conf_timer_percentile = tmp;
658 conf_timer_percentile[conf_timer_percentile_num] = percent;
659 conf_timer_percentile_num++;
661 return (0);
662 } /* }}} int statsd_config_timer_percentile */
664 static int statsd_config (oconfig_item_t *ci) /* {{{ */
665 {
666 int i;
668 for (i = 0; i < ci->children_num; i++)
669 {
670 oconfig_item_t *child = ci->children + i;
672 if (strcasecmp ("Host", child->key) == 0)
673 cf_util_get_string (child, &conf_node);
674 else if (strcasecmp ("Port", child->key) == 0)
675 cf_util_get_service (child, &conf_service);
676 else if (strcasecmp ("DeleteCounters", child->key) == 0)
677 cf_util_get_boolean (child, &conf_delete_counters);
678 else if (strcasecmp ("DeleteTimers", child->key) == 0)
679 cf_util_get_boolean (child, &conf_delete_timers);
680 else if (strcasecmp ("DeleteGauges", child->key) == 0)
681 cf_util_get_boolean (child, &conf_delete_gauges);
682 else if (strcasecmp ("DeleteSets", child->key) == 0)
683 cf_util_get_boolean (child, &conf_delete_sets);
684 else if (strcasecmp ("TimerLower", child->key) == 0)
685 cf_util_get_boolean (child, &conf_timer_lower);
686 else if (strcasecmp ("TimerUpper", child->key) == 0)
687 cf_util_get_boolean (child, &conf_timer_upper);
688 else if (strcasecmp ("TimerSum", child->key) == 0)
689 cf_util_get_boolean (child, &conf_timer_sum);
690 else if (strcasecmp ("TimerCount", child->key) == 0)
691 cf_util_get_boolean (child, &conf_timer_count);
692 else if (strcasecmp ("TimerPercentile", child->key) == 0)
693 statsd_config_timer_percentile (child);
694 else
695 ERROR ("statsd plugin: The \"%s\" config option is not valid.",
696 child->key);
697 }
699 return (0);
700 } /* }}} int statsd_config */
702 static int statsd_init (void) /* {{{ */
703 {
704 pthread_mutex_lock (&metrics_lock);
705 if (metrics_tree == NULL)
706 metrics_tree = c_avl_create ((void *) strcmp);
708 if (!network_thread_running)
709 {
710 int status;
712 status = pthread_create (&network_thread,
713 /* attr = */ NULL,
714 statsd_network_thread,
715 /* args = */ NULL);
716 if (status != 0)
717 {
718 char errbuf[1024];
719 pthread_mutex_unlock (&metrics_lock);
720 ERROR ("statsd plugin: pthread_create failed: %s",
721 sstrerror (errno, errbuf, sizeof (errbuf)));
722 return (status);
723 }
724 }
725 network_thread_running = 1;
727 pthread_mutex_unlock (&metrics_lock);
729 return (0);
730 } /* }}} int statsd_init */
732 /* Must hold metrics_lock when calling this function. */
733 static int statsd_metric_clear_set_unsafe (statsd_metric_t *metric) /* {{{ */
734 {
735 void *key;
736 void *value;
738 if ((metric == NULL) || (metric->type != STATSD_SET))
739 return (EINVAL);
741 if (metric->set == NULL)
742 return (0);
744 while (c_avl_pick (metric->set, &key, &value) == 0)
745 {
746 sfree (key);
747 sfree (value);
748 }
750 return (0);
751 } /* }}} int statsd_metric_clear_set_unsafe */
753 /* Must hold metrics_lock when calling this function. */
754 static int statsd_metric_submit_unsafe (char const *name, /* {{{ */
755 statsd_metric_t const *metric)
756 {
757 value_t values[1];
758 value_list_t vl = VALUE_LIST_INIT;
760 vl.values = values;
761 vl.values_len = 1;
762 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
763 sstrncpy (vl.plugin, "statsd", sizeof (vl.plugin));
765 if (metric->type == STATSD_GAUGE)
766 sstrncpy (vl.type, "gauge", sizeof (vl.type));
767 else if (metric->type == STATSD_TIMER)
768 sstrncpy (vl.type, "latency", sizeof (vl.type));
769 else if (metric->type == STATSD_SET)
770 sstrncpy (vl.type, "objects", sizeof (vl.type));
771 else /* if (metric->type == STATSD_COUNTER) */
772 sstrncpy (vl.type, "derive", sizeof (vl.type));
774 sstrncpy (vl.type_instance, name, sizeof (vl.type_instance));
776 if (metric->type == STATSD_GAUGE)
777 values[0].gauge = (gauge_t) metric->value;
778 else if (metric->type == STATSD_TIMER)
779 {
780 size_t i;
781 _Bool have_events = (metric->updates_num > 0);
783 /* Make sure all timer metrics share the *same* timestamp. */
784 vl.time = cdtime ();
786 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
787 "%s-average", name);
788 values[0].gauge = have_events
789 ? CDTIME_T_TO_DOUBLE (latency_counter_get_average (metric->latency))
790 : NAN;
791 plugin_dispatch_values (&vl);
793 if (conf_timer_lower) {
794 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
795 "%s-lower", name);
796 values[0].gauge = have_events
797 ? CDTIME_T_TO_DOUBLE (latency_counter_get_min (metric->latency))
798 : NAN;
799 plugin_dispatch_values (&vl);
800 }
802 if (conf_timer_upper) {
803 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
804 "%s-upper", name);
805 values[0].gauge = have_events
806 ? CDTIME_T_TO_DOUBLE (latency_counter_get_max (metric->latency))
807 : NAN;
808 plugin_dispatch_values (&vl);
809 }
811 if (conf_timer_sum) {
812 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
813 "%s-sum", name);
814 values[0].gauge = have_events
815 ? CDTIME_T_TO_DOUBLE (latency_counter_get_sum (metric->latency))
816 : NAN;
817 plugin_dispatch_values (&vl);
818 }
820 for (i = 0; i < conf_timer_percentile_num; i++)
821 {
822 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
823 "%s-percentile-%.0f", name, conf_timer_percentile[i]);
824 values[0].gauge = have_events
825 ? CDTIME_T_TO_DOUBLE (latency_counter_get_percentile (metric->latency, conf_timer_percentile[i]))
826 : NAN;
827 plugin_dispatch_values (&vl);
828 }
830 /* Keep this at the end, since vl.type is set to "gauge" here. The
831 * vl.type's above are implicitly set to "latency". */
832 if (conf_timer_count) {
833 sstrncpy (vl.type, "gauge", sizeof (vl.type));
834 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
835 "%s-count", name);
836 values[0].gauge = latency_counter_get_num (metric->latency);
837 plugin_dispatch_values (&vl);
838 }
840 latency_counter_reset (metric->latency);
841 return (0);
842 }
843 else if (metric->type == STATSD_SET)
844 {
845 if (metric->set == NULL)
846 values[0].gauge = 0.0;
847 else
848 values[0].gauge = (gauge_t) c_avl_size (metric->set);
849 }
850 else { /* STATSD_COUNTER */
851 /*
852 * Expand a single value to two metrics:
853 *
854 * - The absolute counter, as a gauge
855 * - A derived rate for this counter
856 */
857 values[0].derive = (derive_t) metric->value;
858 plugin_dispatch_values(&vl);
860 sstrncpy(vl.type, "gauge", sizeof (vl.type));
861 values[0].gauge = (gauge_t) metric->value;
862 }
864 return (plugin_dispatch_values (&vl));
865 } /* }}} int statsd_metric_submit_unsafe */
867 static int statsd_read (void) /* {{{ */
868 {
869 c_avl_iterator_t *iter;
870 char *name;
871 statsd_metric_t *metric;
873 char **to_be_deleted = NULL;
874 size_t to_be_deleted_num = 0;
875 size_t i;
877 pthread_mutex_lock (&metrics_lock);
879 if (metrics_tree == NULL)
880 {
881 pthread_mutex_unlock (&metrics_lock);
882 return (0);
883 }
885 iter = c_avl_get_iterator (metrics_tree);
886 while (c_avl_iterator_next (iter, (void *) &name, (void *) &metric) == 0)
887 {
888 if ((metric->updates_num == 0)
889 && ((conf_delete_counters && (metric->type == STATSD_COUNTER))
890 || (conf_delete_timers && (metric->type == STATSD_TIMER))
891 || (conf_delete_gauges && (metric->type == STATSD_GAUGE))
892 || (conf_delete_sets && (metric->type == STATSD_SET))))
893 {
894 DEBUG ("statsd plugin: Deleting metric \"%s\".", name);
895 strarray_add (&to_be_deleted, &to_be_deleted_num, name);
896 continue;
897 }
899 /* Names have a prefix, e.g. "c:", which determines the (statsd) type.
900 * Remove this here. */
901 statsd_metric_submit_unsafe (name + 2, metric);
903 /* Reset the metric. */
904 metric->updates_num = 0;
905 if (metric->type == STATSD_SET)
906 statsd_metric_clear_set_unsafe (metric);
907 }
908 c_avl_iterator_destroy (iter);
910 for (i = 0; i < to_be_deleted_num; i++)
911 {
912 int status;
914 status = c_avl_remove (metrics_tree, to_be_deleted[i],
915 (void *) &name, (void *) &metric);
916 if (status != 0)
917 {
918 ERROR ("stats plugin: c_avl_remove (\"%s\") failed with status %i.",
919 to_be_deleted[i], status);
920 continue;
921 }
923 sfree (name);
924 statsd_metric_free (metric);
925 }
927 pthread_mutex_unlock (&metrics_lock);
929 strarray_free (to_be_deleted, to_be_deleted_num);
931 return (0);
932 } /* }}} int statsd_read */
934 static int statsd_shutdown (void) /* {{{ */
935 {
936 void *key;
937 void *value;
939 pthread_mutex_lock (&metrics_lock);
941 if (network_thread_running)
942 {
943 network_thread_shutdown = 1;
944 pthread_kill (network_thread, SIGTERM);
945 pthread_join (network_thread, /* retval = */ NULL);
946 }
947 network_thread_running = 0;
949 while (c_avl_pick (metrics_tree, &key, &value) == 0)
950 {
951 sfree (key);
952 statsd_metric_free (value);
953 }
954 c_avl_destroy (metrics_tree);
955 metrics_tree = NULL;
957 sfree (conf_node);
958 sfree (conf_service);
960 pthread_mutex_unlock (&metrics_lock);
962 return (0);
963 } /* }}} int statsd_shutdown */
965 void module_register (void)
966 {
967 plugin_register_complex_config ("statsd", statsd_config);
968 plugin_register_init ("statsd", statsd_init);
969 plugin_register_read ("statsd", statsd_read);
970 plugin_register_shutdown ("statsd", statsd_shutdown);
971 }
973 /* vim: set sw=2 sts=2 et fdm=marker : */