1 /**
2 * collectd - src/statsd.c
3 * Copyright (C) 2013 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 */
27 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "configfile.h"
31 #include "utils_avltree.h"
32 #include "utils_complain.h"
33 #include "utils_latency.h"
35 #include <pthread.h>
37 #include <sys/types.h>
38 #include <netdb.h>
39 #include <poll.h>
41 /* AIX doesn't have MSG_DONTWAIT */
42 #ifndef MSG_DONTWAIT
43 # define MSG_DONTWAIT MSG_NONBLOCK
44 #endif
46 #ifndef STATSD_DEFAULT_NODE
47 # define STATSD_DEFAULT_NODE NULL
48 #endif
50 #ifndef STATSD_DEFAULT_SERVICE
51 # define STATSD_DEFAULT_SERVICE "8125"
52 #endif
54 enum metric_type_e
55 {
56 STATSD_COUNTER,
57 STATSD_TIMER,
58 STATSD_GAUGE,
59 STATSD_SET
60 };
61 typedef enum metric_type_e metric_type_t;
63 struct statsd_metric_s
64 {
65 metric_type_t type;
66 double value;
67 latency_counter_t *latency;
68 c_avl_tree_t *set;
69 unsigned long updates_num;
70 };
71 typedef struct statsd_metric_s statsd_metric_t;
73 static c_avl_tree_t *metrics_tree = NULL;
74 static pthread_mutex_t metrics_lock = PTHREAD_MUTEX_INITIALIZER;
76 static pthread_t network_thread;
77 static _Bool network_thread_running = 0;
78 static _Bool network_thread_shutdown = 0;
80 static char *conf_node = NULL;
81 static char *conf_service = NULL;
83 static _Bool conf_delete_counters = 0;
84 static _Bool conf_delete_timers = 0;
85 static _Bool conf_delete_gauges = 0;
86 static _Bool conf_delete_sets = 0;
88 static double *conf_timer_percentile = NULL;
89 static size_t conf_timer_percentile_num = 0;
91 static _Bool conf_timer_lower = 0;
92 static _Bool conf_timer_upper = 0;
93 static _Bool conf_timer_sum = 0;
94 static _Bool conf_timer_count = 0;
96 /* Must hold metrics_lock when calling this function. */
97 static statsd_metric_t *statsd_metric_lookup_unsafe (char const *name, /* {{{ */
98 metric_type_t type)
99 {
100 char key[DATA_MAX_NAME_LEN + 2];
101 char *key_copy;
102 statsd_metric_t *metric;
103 int status;
105 switch (type)
106 {
107 case STATSD_COUNTER: key[0] = 'c'; break;
108 case STATSD_TIMER: key[0] = 't'; break;
109 case STATSD_GAUGE: key[0] = 'g'; break;
110 case STATSD_SET: key[0] = 's'; break;
111 default: return (NULL);
112 }
114 key[1] = ':';
115 sstrncpy (&key[2], name, sizeof (key) - 2);
117 status = c_avl_get (metrics_tree, key, (void *) &metric);
118 if (status == 0)
119 return (metric);
121 key_copy = strdup (key);
122 if (key_copy == NULL)
123 {
124 ERROR ("statsd plugin: strdup failed.");
125 return (NULL);
126 }
128 metric = malloc (sizeof (*metric));
129 if (metric == NULL)
130 {
131 ERROR ("statsd plugin: malloc failed.");
132 sfree (key_copy);
133 return (NULL);
134 }
135 memset (metric, 0, sizeof (*metric));
137 metric->type = type;
138 metric->latency = NULL;
139 metric->set = NULL;
141 status = c_avl_insert (metrics_tree, key_copy, metric);
142 if (status != 0)
143 {
144 ERROR ("statsd plugin: c_avl_insert failed.");
145 sfree (key_copy);
146 sfree (metric);
147 return (NULL);
148 }
150 return (metric);
151 } /* }}} statsd_metric_lookup_unsafe */
153 static int statsd_metric_set (char const *name, double value, /* {{{ */
154 metric_type_t type)
155 {
156 statsd_metric_t *metric;
158 pthread_mutex_lock (&metrics_lock);
160 metric = statsd_metric_lookup_unsafe (name, type);
161 if (metric == NULL)
162 {
163 pthread_mutex_unlock (&metrics_lock);
164 return (-1);
165 }
167 metric->value = value;
168 metric->updates_num++;
170 pthread_mutex_unlock (&metrics_lock);
172 return (0);
173 } /* }}} int statsd_metric_set */
175 static int statsd_metric_add (char const *name, double delta, /* {{{ */
176 metric_type_t type)
177 {
178 statsd_metric_t *metric;
180 pthread_mutex_lock (&metrics_lock);
182 metric = statsd_metric_lookup_unsafe (name, type);
183 if (metric == NULL)
184 {
185 pthread_mutex_unlock (&metrics_lock);
186 return (-1);
187 }
189 metric->value += delta;
190 metric->updates_num++;
192 pthread_mutex_unlock (&metrics_lock);
194 return (0);
195 } /* }}} int statsd_metric_add */
197 static void statsd_metric_free (statsd_metric_t *metric) /* {{{ */
198 {
199 if (metric == NULL)
200 return;
202 if (metric->latency != NULL)
203 {
204 latency_counter_destroy (metric->latency);
205 metric->latency = NULL;
206 }
208 if (metric->set != NULL)
209 {
210 void *key;
211 void *value;
213 while (c_avl_pick (metric->set, &key, &value) == 0)
214 {
215 sfree (key);
216 assert (value == NULL);
217 }
219 c_avl_destroy (metric->set);
220 metric->set = NULL;
221 }
223 sfree (metric);
224 } /* }}} void statsd_metric_free */
226 static int statsd_parse_value (char const *str, value_t *ret_value) /* {{{ */
227 {
228 char *endptr = NULL;
230 ret_value->gauge = (gauge_t) strtod (str, &endptr);
231 if ((str == endptr) || ((endptr != NULL) && (*endptr != 0)))
232 return (-1);
234 return (0);
235 } /* }}} int statsd_parse_value */
237 static int statsd_handle_counter (char const *name, /* {{{ */
238 char const *value_str,
239 char const *extra)
240 {
241 value_t value;
242 value_t scale;
243 int status;
245 if ((extra != NULL) && (extra[0] != '@'))
246 return (-1);
248 scale.gauge = 1.0;
249 if (extra != NULL)
250 {
251 status = statsd_parse_value (extra + 1, &scale);
252 if (status != 0)
253 return (status);
255 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
256 return (-1);
257 }
259 value.gauge = 1.0;
260 status = statsd_parse_value (value_str, &value);
261 if (status != 0)
262 return (status);
264 return (statsd_metric_add (name, (double) (value.gauge / scale.gauge),
265 STATSD_COUNTER));
266 } /* }}} int statsd_handle_counter */
268 static int statsd_handle_gauge (char const *name, /* {{{ */
269 char const *value_str)
270 {
271 value_t value;
272 int status;
274 value.gauge = 0;
275 status = statsd_parse_value (value_str, &value);
276 if (status != 0)
277 return (status);
279 if ((value_str[0] == '+') || (value_str[0] == '-'))
280 return (statsd_metric_add (name, (double) value.gauge, STATSD_GAUGE));
281 else
282 return (statsd_metric_set (name, (double) value.gauge, STATSD_GAUGE));
283 } /* }}} int statsd_handle_gauge */
285 static int statsd_handle_timer (char const *name, /* {{{ */
286 char const *value_str,
287 char const *extra)
288 {
289 statsd_metric_t *metric;
290 value_t value_ms;
291 value_t scale;
292 cdtime_t value;
293 int status;
295 if ((extra != NULL) && (extra[0] != '@'))
296 return (-1);
298 scale.gauge = 1.0;
299 if (extra != NULL)
300 {
301 status = statsd_parse_value (extra + 1, &scale);
302 if (status != 0)
303 return (status);
305 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
306 return (-1);
307 }
309 value_ms.derive = 0;
310 status = statsd_parse_value (value_str, &value_ms);
311 if (status != 0)
312 return (status);
314 value = MS_TO_CDTIME_T (value_ms.gauge / scale.gauge);
316 pthread_mutex_lock (&metrics_lock);
318 metric = statsd_metric_lookup_unsafe (name, STATSD_TIMER);
319 if (metric == NULL)
320 {
321 pthread_mutex_unlock (&metrics_lock);
322 return (-1);
323 }
325 if (metric->latency == NULL)
326 metric->latency = latency_counter_create ();
327 if (metric->latency == NULL)
328 {
329 pthread_mutex_unlock (&metrics_lock);
330 return (-1);
331 }
333 latency_counter_add (metric->latency, value);
334 metric->updates_num++;
336 pthread_mutex_unlock (&metrics_lock);
337 return (0);
338 } /* }}} int statsd_handle_timer */
340 static int statsd_handle_set (char const *name, /* {{{ */
341 char const *set_key_orig)
342 {
343 statsd_metric_t *metric = NULL;
344 char *set_key;
345 int status;
347 pthread_mutex_lock (&metrics_lock);
349 metric = statsd_metric_lookup_unsafe (name, STATSD_SET);
350 if (metric == NULL)
351 {
352 pthread_mutex_unlock (&metrics_lock);
353 return (-1);
354 }
356 /* Make sure metric->set exists. */
357 if (metric->set == NULL)
358 metric->set = c_avl_create ((void *) strcmp);
360 if (metric->set == NULL)
361 {
362 pthread_mutex_unlock (&metrics_lock);
363 ERROR ("statsd plugin: c_avl_create failed.");
364 return (-1);
365 }
367 set_key = strdup (set_key_orig);
368 if (set_key == NULL)
369 {
370 pthread_mutex_unlock (&metrics_lock);
371 ERROR ("statsd plugin: strdup failed.");
372 return (-1);
373 }
375 status = c_avl_insert (metric->set, set_key, /* value = */ NULL);
376 if (status < 0)
377 {
378 pthread_mutex_unlock (&metrics_lock);
379 if (status < 0)
380 ERROR ("statsd plugin: c_avl_insert (\"%s\") failed with status %i.",
381 set_key, status);
382 sfree (set_key);
383 return (-1);
384 }
385 else if (status > 0) /* key already exists */
386 {
387 sfree (set_key);
388 }
390 metric->updates_num++;
392 pthread_mutex_unlock (&metrics_lock);
393 return (0);
394 } /* }}} int statsd_handle_set */
396 static int statsd_parse_line (char *buffer) /* {{{ */
397 {
398 char *name = buffer;
399 char *value;
400 char *type;
401 char *extra;
403 type = strchr (name, '|');
404 if (type == NULL)
405 return (-1);
406 *type = 0;
407 type++;
409 value = strrchr (name, ':');
410 if (value == NULL)
411 return (-1);
412 *value = 0;
413 value++;
415 extra = strchr (type, '|');
416 if (extra != NULL)
417 {
418 *extra = 0;
419 extra++;
420 }
422 if (strcmp ("c", type) == 0)
423 return (statsd_handle_counter (name, value, extra));
424 else if (strcmp ("ms", type) == 0)
425 return (statsd_handle_timer (name, value, extra));
427 /* extra is only valid for counters and timers */
428 if (extra != NULL)
429 return (-1);
431 if (strcmp ("g", type) == 0)
432 return (statsd_handle_gauge (name, value));
433 else if (strcmp ("s", type) == 0)
434 return (statsd_handle_set (name, value));
435 else
436 return (-1);
437 } /* }}} void statsd_parse_line */
439 static void statsd_parse_buffer (char *buffer) /* {{{ */
440 {
441 while (buffer != NULL)
442 {
443 char orig[64];
444 char *next;
445 int status;
447 next = strchr (buffer, '\n');
448 if (next != NULL)
449 {
450 *next = 0;
451 next++;
452 }
454 if (*buffer == 0)
455 {
456 buffer = next;
457 continue;
458 }
460 sstrncpy (orig, buffer, sizeof (orig));
462 status = statsd_parse_line (buffer);
463 if (status != 0)
464 ERROR ("statsd plugin: Unable to parse line: \"%s\"", orig);
466 buffer = next;
467 }
468 } /* }}} void statsd_parse_buffer */
470 static void statsd_network_read (int fd) /* {{{ */
471 {
472 char buffer[4096];
473 size_t buffer_size;
474 ssize_t status;
476 status = recv (fd, buffer, sizeof (buffer), /* flags = */ MSG_DONTWAIT);
477 if (status < 0)
478 {
479 char errbuf[1024];
481 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
482 return;
484 ERROR ("statsd plugin: recv(2) failed: %s",
485 sstrerror (errno, errbuf, sizeof (errbuf)));
486 return;
487 }
489 buffer_size = (size_t) status;
490 if (buffer_size >= sizeof (buffer))
491 buffer_size = sizeof (buffer) - 1;
492 buffer[buffer_size] = 0;
494 statsd_parse_buffer (buffer);
495 } /* }}} void statsd_network_read */
497 static int statsd_network_init (struct pollfd **ret_fds, /* {{{ */
498 size_t *ret_fds_num)
499 {
500 struct pollfd *fds = NULL;
501 size_t fds_num = 0;
503 struct addrinfo ai_hints;
504 struct addrinfo *ai_list = NULL;
505 struct addrinfo *ai_ptr;
506 int status;
508 char const *node = (conf_node != NULL) ? conf_node : STATSD_DEFAULT_NODE;
509 char const *service = (conf_service != NULL)
510 ? conf_service : STATSD_DEFAULT_SERVICE;
512 memset (&ai_hints, 0, sizeof (ai_hints));
513 ai_hints.ai_flags = AI_PASSIVE;
514 #ifdef AI_ADDRCONFIG
515 ai_hints.ai_flags |= AI_ADDRCONFIG;
516 #endif
517 ai_hints.ai_family = AF_UNSPEC;
518 ai_hints.ai_socktype = SOCK_DGRAM;
520 status = getaddrinfo (node, service, &ai_hints, &ai_list);
521 if (status != 0)
522 {
523 ERROR ("statsd plugin: getaddrinfo (\"%s\", \"%s\") failed: %s",
524 node, service, gai_strerror (status));
525 return (status);
526 }
528 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
529 {
530 int fd;
531 struct pollfd *tmp;
533 char dbg_node[NI_MAXHOST];
534 char dbg_service[NI_MAXSERV];
536 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
537 if (fd < 0)
538 {
539 char errbuf[1024];
540 ERROR ("statsd plugin: socket(2) failed: %s",
541 sstrerror (errno, errbuf, sizeof (errbuf)));
542 continue;
543 }
545 getnameinfo (ai_ptr->ai_addr, ai_ptr->ai_addrlen,
546 dbg_node, sizeof (dbg_node), dbg_service, sizeof (dbg_service),
547 NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV);
548 DEBUG ("statsd plugin: Trying to bind to [%s]:%s ...", dbg_node, dbg_service);
550 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
551 if (status != 0)
552 {
553 char errbuf[1024];
554 ERROR ("statsd plugin: bind(2) failed: %s",
555 sstrerror (errno, errbuf, sizeof (errbuf)));
556 close (fd);
557 continue;
558 }
560 tmp = realloc (fds, sizeof (*fds) * (fds_num + 1));
561 if (tmp == NULL)
562 {
563 ERROR ("statsd plugin: realloc failed.");
564 continue;
565 }
566 fds = tmp;
567 tmp = fds + fds_num;
568 fds_num++;
570 memset (tmp, 0, sizeof (*tmp));
571 tmp->fd = fd;
572 tmp->events = POLLIN | POLLPRI;
573 }
575 freeaddrinfo (ai_list);
577 if (fds_num == 0)
578 {
579 ERROR ("statsd plugin: Unable to create listening socket for [%s]:%s.",
580 (node != NULL) ? node : "::", service);
581 return (ENOENT);
582 }
584 *ret_fds = fds;
585 *ret_fds_num = fds_num;
586 return (0);
587 } /* }}} int statsd_network_init */
589 static void *statsd_network_thread (void *args) /* {{{ */
590 {
591 struct pollfd *fds = NULL;
592 size_t fds_num = 0;
593 int status;
594 size_t i;
596 status = statsd_network_init (&fds, &fds_num);
597 if (status != 0)
598 {
599 ERROR ("statsd plugin: Unable to open listening sockets.");
600 pthread_exit ((void *) 0);
601 }
603 while (!network_thread_shutdown)
604 {
605 status = poll (fds, (nfds_t) fds_num, /* timeout = */ -1);
606 if (status < 0)
607 {
608 char errbuf[1024];
610 if ((errno == EINTR) || (errno == EAGAIN))
611 continue;
613 ERROR ("statsd plugin: poll(2) failed: %s",
614 sstrerror (errno, errbuf, sizeof (errbuf)));
615 break;
616 }
618 for (i = 0; i < fds_num; i++)
619 {
620 if ((fds[i].revents & (POLLIN | POLLPRI)) == 0)
621 continue;
623 statsd_network_read (fds[i].fd);
624 fds[i].revents = 0;
625 }
626 } /* while (!network_thread_shutdown) */
628 /* Clean up */
629 for (i = 0; i < fds_num; i++)
630 close (fds[i].fd);
631 sfree (fds);
633 return ((void *) 0);
634 } /* }}} void *statsd_network_thread */
636 static int statsd_config_timer_percentile (oconfig_item_t *ci) /* {{{ */
637 {
638 double percent = NAN;
639 double *tmp;
640 int status;
642 status = cf_util_get_double (ci, &percent);
643 if (status != 0)
644 return (status);
646 if ((percent <= 0.0) || (percent >= 100))
647 {
648 ERROR ("statsd plugin: The value for \"%s\" must be between 0 and 100, "
649 "exclusively.", ci->key);
650 return (ERANGE);
651 }
653 tmp = realloc (conf_timer_percentile,
654 sizeof (*conf_timer_percentile) * (conf_timer_percentile_num + 1));
655 if (tmp == NULL)
656 {
657 ERROR ("statsd plugin: realloc failed.");
658 return (ENOMEM);
659 }
660 conf_timer_percentile = tmp;
661 conf_timer_percentile[conf_timer_percentile_num] = percent;
662 conf_timer_percentile_num++;
664 return (0);
665 } /* }}} int statsd_config_timer_percentile */
667 static int statsd_config (oconfig_item_t *ci) /* {{{ */
668 {
669 int i;
671 for (i = 0; i < ci->children_num; i++)
672 {
673 oconfig_item_t *child = ci->children + i;
675 if (strcasecmp ("Host", child->key) == 0)
676 cf_util_get_string (child, &conf_node);
677 else if (strcasecmp ("Port", child->key) == 0)
678 cf_util_get_service (child, &conf_service);
679 else if (strcasecmp ("DeleteCounters", child->key) == 0)
680 cf_util_get_boolean (child, &conf_delete_counters);
681 else if (strcasecmp ("DeleteTimers", child->key) == 0)
682 cf_util_get_boolean (child, &conf_delete_timers);
683 else if (strcasecmp ("DeleteGauges", child->key) == 0)
684 cf_util_get_boolean (child, &conf_delete_gauges);
685 else if (strcasecmp ("DeleteSets", child->key) == 0)
686 cf_util_get_boolean (child, &conf_delete_sets);
687 else if (strcasecmp ("TimerLower", child->key) == 0)
688 cf_util_get_boolean (child, &conf_timer_lower);
689 else if (strcasecmp ("TimerUpper", child->key) == 0)
690 cf_util_get_boolean (child, &conf_timer_upper);
691 else if (strcasecmp ("TimerSum", child->key) == 0)
692 cf_util_get_boolean (child, &conf_timer_sum);
693 else if (strcasecmp ("TimerCount", child->key) == 0)
694 cf_util_get_boolean (child, &conf_timer_count);
695 else if (strcasecmp ("TimerPercentile", child->key) == 0)
696 statsd_config_timer_percentile (child);
697 else
698 ERROR ("statsd plugin: The \"%s\" config option is not valid.",
699 child->key);
700 }
702 return (0);
703 } /* }}} int statsd_config */
705 static int statsd_init (void) /* {{{ */
706 {
707 pthread_mutex_lock (&metrics_lock);
708 if (metrics_tree == NULL)
709 metrics_tree = c_avl_create ((void *) strcmp);
711 if (!network_thread_running)
712 {
713 int status;
715 status = pthread_create (&network_thread,
716 /* attr = */ NULL,
717 statsd_network_thread,
718 /* args = */ NULL);
719 if (status != 0)
720 {
721 char errbuf[1024];
722 pthread_mutex_unlock (&metrics_lock);
723 ERROR ("statsd plugin: pthread_create failed: %s",
724 sstrerror (errno, errbuf, sizeof (errbuf)));
725 return (status);
726 }
727 }
728 network_thread_running = 1;
730 pthread_mutex_unlock (&metrics_lock);
732 return (0);
733 } /* }}} int statsd_init */
735 /* Must hold metrics_lock when calling this function. */
736 static int statsd_metric_clear_set_unsafe (statsd_metric_t *metric) /* {{{ */
737 {
738 void *key;
739 void *value;
741 if ((metric == NULL) || (metric->type != STATSD_SET))
742 return (EINVAL);
744 if (metric->set == NULL)
745 return (0);
747 while (c_avl_pick (metric->set, &key, &value) == 0)
748 {
749 sfree (key);
750 sfree (value);
751 }
753 return (0);
754 } /* }}} int statsd_metric_clear_set_unsafe */
756 /* Must hold metrics_lock when calling this function. */
757 static int statsd_metric_submit_unsafe (char const *name, /* {{{ */
758 statsd_metric_t const *metric)
759 {
760 value_t values[1];
761 value_list_t vl = VALUE_LIST_INIT;
763 vl.values = values;
764 vl.values_len = 1;
765 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
766 sstrncpy (vl.plugin, "statsd", sizeof (vl.plugin));
768 if (metric->type == STATSD_GAUGE)
769 sstrncpy (vl.type, "gauge", sizeof (vl.type));
770 else if (metric->type == STATSD_TIMER)
771 sstrncpy (vl.type, "latency", sizeof (vl.type));
772 else if (metric->type == STATSD_SET)
773 sstrncpy (vl.type, "objects", sizeof (vl.type));
774 else /* if (metric->type == STATSD_COUNTER) */
775 sstrncpy (vl.type, "derive", sizeof (vl.type));
777 sstrncpy (vl.type_instance, name, sizeof (vl.type_instance));
779 if (metric->type == STATSD_GAUGE)
780 values[0].gauge = (gauge_t) metric->value;
781 else if (metric->type == STATSD_TIMER)
782 {
783 size_t i;
784 _Bool have_events = (metric->updates_num > 0);
786 /* Make sure all timer metrics share the *same* timestamp. */
787 vl.time = cdtime ();
789 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
790 "%s-average", name);
791 values[0].gauge = have_events
792 ? CDTIME_T_TO_DOUBLE (latency_counter_get_average (metric->latency))
793 : NAN;
794 plugin_dispatch_values (&vl);
796 if (conf_timer_lower) {
797 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
798 "%s-lower", name);
799 values[0].gauge = have_events
800 ? CDTIME_T_TO_DOUBLE (latency_counter_get_min (metric->latency))
801 : NAN;
802 plugin_dispatch_values (&vl);
803 }
805 if (conf_timer_upper) {
806 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
807 "%s-upper", name);
808 values[0].gauge = have_events
809 ? CDTIME_T_TO_DOUBLE (latency_counter_get_max (metric->latency))
810 : NAN;
811 plugin_dispatch_values (&vl);
812 }
814 if (conf_timer_sum) {
815 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
816 "%s-sum", name);
817 values[0].gauge = have_events
818 ? CDTIME_T_TO_DOUBLE (latency_counter_get_sum (metric->latency))
819 : NAN;
820 plugin_dispatch_values (&vl);
821 }
823 for (i = 0; i < conf_timer_percentile_num; i++)
824 {
825 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
826 "%s-percentile-%.0f", name, conf_timer_percentile[i]);
827 values[0].gauge = have_events
828 ? CDTIME_T_TO_DOUBLE (latency_counter_get_percentile (metric->latency, conf_timer_percentile[i]))
829 : NAN;
830 plugin_dispatch_values (&vl);
831 }
833 /* Keep this at the end, since vl.type is set to "gauge" here. The
834 * vl.type's above are implicitly set to "latency". */
835 if (conf_timer_count) {
836 sstrncpy (vl.type, "gauge", sizeof (vl.type));
837 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
838 "%s-count", name);
839 values[0].gauge = latency_counter_get_num (metric->latency);
840 plugin_dispatch_values (&vl);
841 }
843 latency_counter_reset (metric->latency);
844 return (0);
845 }
846 else if (metric->type == STATSD_SET)
847 {
848 if (metric->set == NULL)
849 values[0].gauge = 0.0;
850 else
851 values[0].gauge = (gauge_t) c_avl_size (metric->set);
852 }
853 else { /* STATSD_COUNTER */
854 /*
855 * Expand a single value to two metrics:
856 *
857 * - The absolute counter, as a gauge
858 * - A derived rate for this counter
859 */
860 values[0].derive = (derive_t) metric->value;
861 plugin_dispatch_values(&vl);
863 sstrncpy(vl.type, "gauge", sizeof (vl.type));
864 values[0].gauge = (gauge_t) metric->value;
865 }
867 return (plugin_dispatch_values (&vl));
868 } /* }}} int statsd_metric_submit_unsafe */
870 static int statsd_read (void) /* {{{ */
871 {
872 c_avl_iterator_t *iter;
873 char *name;
874 statsd_metric_t *metric;
876 char **to_be_deleted = NULL;
877 size_t to_be_deleted_num = 0;
878 size_t i;
880 pthread_mutex_lock (&metrics_lock);
882 if (metrics_tree == NULL)
883 {
884 pthread_mutex_unlock (&metrics_lock);
885 return (0);
886 }
888 iter = c_avl_get_iterator (metrics_tree);
889 while (c_avl_iterator_next (iter, (void *) &name, (void *) &metric) == 0)
890 {
891 if ((metric->updates_num == 0)
892 && ((conf_delete_counters && (metric->type == STATSD_COUNTER))
893 || (conf_delete_timers && (metric->type == STATSD_TIMER))
894 || (conf_delete_gauges && (metric->type == STATSD_GAUGE))
895 || (conf_delete_sets && (metric->type == STATSD_SET))))
896 {
897 DEBUG ("statsd plugin: Deleting metric \"%s\".", name);
898 strarray_add (&to_be_deleted, &to_be_deleted_num, name);
899 continue;
900 }
902 /* Names have a prefix, e.g. "c:", which determines the (statsd) type.
903 * Remove this here. */
904 statsd_metric_submit_unsafe (name + 2, metric);
906 /* Reset the metric. */
907 metric->updates_num = 0;
908 if (metric->type == STATSD_SET)
909 statsd_metric_clear_set_unsafe (metric);
910 }
911 c_avl_iterator_destroy (iter);
913 for (i = 0; i < to_be_deleted_num; i++)
914 {
915 int status;
917 status = c_avl_remove (metrics_tree, to_be_deleted[i],
918 (void *) &name, (void *) &metric);
919 if (status != 0)
920 {
921 ERROR ("stats plugin: c_avl_remove (\"%s\") failed with status %i.",
922 to_be_deleted[i], status);
923 continue;
924 }
926 sfree (name);
927 statsd_metric_free (metric);
928 }
930 pthread_mutex_unlock (&metrics_lock);
932 strarray_free (to_be_deleted, to_be_deleted_num);
934 return (0);
935 } /* }}} int statsd_read */
937 static int statsd_shutdown (void) /* {{{ */
938 {
939 void *key;
940 void *value;
942 pthread_mutex_lock (&metrics_lock);
944 if (network_thread_running)
945 {
946 network_thread_shutdown = 1;
947 pthread_kill (network_thread, SIGTERM);
948 pthread_join (network_thread, /* retval = */ NULL);
949 }
950 network_thread_running = 0;
952 while (c_avl_pick (metrics_tree, &key, &value) == 0)
953 {
954 sfree (key);
955 statsd_metric_free (value);
956 }
957 c_avl_destroy (metrics_tree);
958 metrics_tree = NULL;
960 sfree (conf_node);
961 sfree (conf_service);
963 pthread_mutex_unlock (&metrics_lock);
965 return (0);
966 } /* }}} int statsd_shutdown */
968 void module_register (void)
969 {
970 plugin_register_complex_config ("statsd", statsd_config);
971 plugin_register_init ("statsd", statsd_init);
972 plugin_register_read ("statsd", statsd_read);
973 plugin_register_shutdown ("statsd", statsd_shutdown);
974 }
976 /* vim: set sw=2 sts=2 et fdm=marker : */