1 /**
2 * collectd - src/pinba.c (based on code from pinba_engine 0.0.5)
3 * Copyright (c) 2007-2009 Antony Dovgal
4 * Copyright (C) 2010 Phoenix Kayo
5 * Copyright (C) 2010 Florian Forster
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; only version 2 of the License is applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Antony Dovgal <tony at daylessday.org>
22 * Phoenix Kayo <kayo.k11.4 at gmail.com>
23 * Florian Forster <octo at collectd.org>
24 **/
26 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
31 #include <netdb.h>
32 #include <poll.h>
34 #include "pinba.pb-c.h"
36 /* AIX doesn't have MSG_DONTWAIT */
37 #ifndef MSG_DONTWAIT
38 #define MSG_DONTWAIT MSG_NONBLOCK
39 #endif
41 /*
42 * Defines
43 */
44 #ifndef PINBA_UDP_BUFFER_SIZE
45 #define PINBA_UDP_BUFFER_SIZE 65536
46 #endif
48 #ifndef PINBA_DEFAULT_NODE
49 #define PINBA_DEFAULT_NODE "::0"
50 #endif
52 #ifndef PINBA_DEFAULT_SERVICE
53 #define PINBA_DEFAULT_SERVICE "30002"
54 #endif
56 #ifndef PINBA_MAX_SOCKETS
57 #define PINBA_MAX_SOCKETS 16
58 #endif
60 /*
61 * Private data structures
62 */
63 /* {{{ */
64 struct pinba_socket_s {
65 struct pollfd fd[PINBA_MAX_SOCKETS];
66 nfds_t fd_num;
67 };
68 typedef struct pinba_socket_s pinba_socket_t;
70 /* Fixed point counter value. n is the decimal part multiplied by 10^9. */
71 struct float_counter_s {
72 uint64_t i;
73 uint64_t n; /* nanos */
74 };
75 typedef struct float_counter_s float_counter_t;
77 struct pinba_statnode_s {
78 /* collector name, used as plugin instance */
79 char *name;
81 /* query data */
82 char *host;
83 char *server;
84 char *script;
86 derive_t req_count;
88 float_counter_t req_time;
89 float_counter_t ru_utime;
90 float_counter_t ru_stime;
92 derive_t doc_size;
93 gauge_t mem_peak;
94 };
95 typedef struct pinba_statnode_s pinba_statnode_t;
96 /* }}} */
98 /*
99 * Module global variables
100 */
101 /* {{{ */
102 static pinba_statnode_t *stat_nodes = NULL;
103 static unsigned int stat_nodes_num = 0;
104 static pthread_mutex_t stat_nodes_lock;
106 static char *conf_node = NULL;
107 static char *conf_service = NULL;
109 static _Bool collector_thread_running = 0;
110 static _Bool collector_thread_do_shutdown = 0;
111 static pthread_t collector_thread_id;
112 /* }}} */
114 /*
115 * Functions
116 */
117 static void float_counter_add(float_counter_t *fc, float val) /* {{{ */
118 {
119 uint64_t tmp;
121 if (val < 0.0)
122 return;
124 tmp = (uint64_t)val;
125 val -= (double)tmp;
127 fc->i += tmp;
128 fc->n += (uint64_t)((val * 1000000000.0) + .5);
130 if (fc->n >= 1000000000) {
131 fc->i += 1;
132 fc->n -= 1000000000;
133 assert(fc->n < 1000000000);
134 }
135 } /* }}} void float_counter_add */
137 static derive_t float_counter_get(const float_counter_t *fc, /* {{{ */
138 uint64_t factor) {
139 derive_t ret;
141 ret = (derive_t)(fc->i * factor);
142 ret += (derive_t)(fc->n / (1000000000 / factor));
144 return (ret);
145 } /* }}} derive_t float_counter_get */
147 static void strset(char **str, const char *new) /* {{{ */
148 {
149 char *tmp;
151 if (!str || !new)
152 return;
154 tmp = strdup(new);
155 if (tmp == NULL)
156 return;
158 sfree(*str);
159 *str = tmp;
160 } /* }}} void strset */
162 static void service_statnode_add(const char *name, /* {{{ */
163 const char *host, const char *server,
164 const char *script) {
165 pinba_statnode_t *node;
167 node = realloc(stat_nodes, sizeof(*stat_nodes) * (stat_nodes_num + 1));
168 if (node == NULL) {
169 ERROR("pinba plugin: realloc failed");
170 return;
171 }
172 stat_nodes = node;
174 node = stat_nodes + stat_nodes_num;
175 memset(node, 0, sizeof(*node));
177 /* reset strings */
178 node->name = NULL;
179 node->host = NULL;
180 node->server = NULL;
181 node->script = NULL;
183 node->mem_peak = NAN;
185 /* fill query data */
186 strset(&node->name, name);
187 strset(&node->host, host);
188 strset(&node->server, server);
189 strset(&node->script, script);
191 /* increment counter */
192 stat_nodes_num++;
193 } /* }}} void service_statnode_add */
195 /* Copy the data from the global "stat_nodes" list into the buffer pointed to
196 * by "res", doing the derivation in the process. Returns the next index or
197 * zero if the end of the list has been reached. */
198 static unsigned int service_statnode_collect(pinba_statnode_t *res, /* {{{ */
199 unsigned int index) {
200 pinba_statnode_t *node;
202 if (stat_nodes_num == 0)
203 return 0;
205 /* begin collecting */
206 if (index == 0)
207 pthread_mutex_lock(&stat_nodes_lock);
209 /* end collecting */
210 if (index >= stat_nodes_num) {
211 pthread_mutex_unlock(&stat_nodes_lock);
212 return 0;
213 }
215 node = stat_nodes + index;
216 memcpy(res, node, sizeof(*res));
218 /* reset node */
219 node->mem_peak = NAN;
221 return (index + 1);
222 } /* }}} unsigned int service_statnode_collect */
224 static void service_statnode_process(pinba_statnode_t *node, /* {{{ */
225 Pinba__Request *request) {
226 node->req_count++;
228 float_counter_add(&node->req_time, request->request_time);
229 float_counter_add(&node->ru_utime, request->ru_utime);
230 float_counter_add(&node->ru_stime, request->ru_stime);
232 node->doc_size += request->document_size;
234 if (isnan(node->mem_peak) ||
235 (node->mem_peak < ((gauge_t)request->memory_peak)))
236 node->mem_peak = (gauge_t)request->memory_peak;
238 } /* }}} void service_statnode_process */
240 static void service_process_request(Pinba__Request *request) /* {{{ */
241 {
242 pthread_mutex_lock(&stat_nodes_lock);
244 for (unsigned int i = 0; i < stat_nodes_num; i++) {
245 if ((stat_nodes[i].host != NULL) &&
246 (strcmp(request->hostname, stat_nodes[i].host) != 0))
247 continue;
249 if ((stat_nodes[i].server != NULL) &&
250 (strcmp(request->server_name, stat_nodes[i].server) != 0))
251 continue;
253 if ((stat_nodes[i].script != NULL) &&
254 (strcmp(request->script_name, stat_nodes[i].script) != 0))
255 continue;
257 service_statnode_process(&stat_nodes[i], request);
258 }
260 pthread_mutex_unlock(&stat_nodes_lock);
261 } /* }}} void service_process_request */
263 static int pb_del_socket(pinba_socket_t *s, /* {{{ */
264 nfds_t index) {
265 if (index >= s->fd_num)
266 return (EINVAL);
268 close(s->fd[index].fd);
269 s->fd[index].fd = -1;
271 /* When deleting the last element in the list, no memmove is necessary. */
272 if (index < (s->fd_num - 1)) {
273 memmove(&s->fd[index], &s->fd[index + 1],
274 sizeof(s->fd[0]) * (s->fd_num - (index + 1)));
275 }
277 s->fd_num--;
278 return (0);
279 } /* }}} int pb_del_socket */
281 static int pb_add_socket(pinba_socket_t *s, /* {{{ */
282 const struct addrinfo *ai) {
283 int fd;
284 int tmp;
285 int status;
287 if (s->fd_num == PINBA_MAX_SOCKETS) {
288 WARNING("pinba plugin: Sorry, you have hit the built-in limit of "
289 "%i sockets. Please complain to the collectd developers so we can "
290 "raise the limit.",
291 PINBA_MAX_SOCKETS);
292 return (-1);
293 }
295 fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
296 if (fd < 0) {
297 char errbuf[1024];
298 ERROR("pinba plugin: socket(2) failed: %s",
299 sstrerror(errno, errbuf, sizeof(errbuf)));
300 return (0);
301 }
303 tmp = 1;
304 status = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp));
305 if (status != 0) {
306 char errbuf[1024];
307 WARNING("pinba plugin: setsockopt(SO_REUSEADDR) failed: %s",
308 sstrerror(errno, errbuf, sizeof(errbuf)));
309 }
311 status = bind(fd, ai->ai_addr, ai->ai_addrlen);
312 if (status != 0) {
313 char errbuf[1024];
314 ERROR("pinba plugin: bind(2) failed: %s",
315 sstrerror(errno, errbuf, sizeof(errbuf)));
316 close(fd);
317 return (0);
318 }
320 s->fd[s->fd_num].fd = fd;
321 s->fd[s->fd_num].events = POLLIN | POLLPRI;
322 s->fd[s->fd_num].revents = 0;
323 s->fd_num++;
325 return (0);
326 } /* }}} int pb_add_socket */
328 static pinba_socket_t *pinba_socket_open(const char *node, /* {{{ */
329 const char *service) {
330 pinba_socket_t *s;
331 struct addrinfo *ai_list;
332 int status;
334 if (node == NULL)
335 node = PINBA_DEFAULT_NODE;
337 if (service == NULL)
338 service = PINBA_DEFAULT_SERVICE;
340 struct addrinfo ai_hints = {.ai_family = AF_UNSPEC,
341 .ai_flags = AI_PASSIVE,
342 .ai_socktype = SOCK_DGRAM};
344 status = getaddrinfo(node, service, &ai_hints, &ai_list);
345 if (status != 0) {
346 ERROR("pinba plugin: getaddrinfo(3) failed: %s", gai_strerror(status));
347 return (NULL);
348 }
349 assert(ai_list != NULL);
351 s = calloc(1, sizeof(*s));
352 if (s == NULL) {
353 freeaddrinfo(ai_list);
354 ERROR("pinba plugin: calloc failed.");
355 return (NULL);
356 }
358 for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL;
359 ai_ptr = ai_ptr->ai_next) {
360 status = pb_add_socket(s, ai_ptr);
361 if (status != 0)
362 break;
363 } /* for (ai_list) */
365 freeaddrinfo(ai_list);
367 if (s->fd_num < 1) {
368 WARNING("pinba plugin: Unable to open socket for address %s.", node);
369 sfree(s);
370 s = NULL;
371 }
373 return (s);
374 } /* }}} pinba_socket_open */
376 static void pinba_socket_free(pinba_socket_t *socket) /* {{{ */
377 {
378 if (!socket)
379 return;
381 for (nfds_t i = 0; i < socket->fd_num; i++) {
382 if (socket->fd[i].fd < 0)
383 continue;
384 close(socket->fd[i].fd);
385 socket->fd[i].fd = -1;
386 }
388 sfree(socket);
389 } /* }}} void pinba_socket_free */
391 static int pinba_process_stats_packet(const uint8_t *buffer, /* {{{ */
392 size_t buffer_size) {
393 Pinba__Request *request;
395 request = pinba__request__unpack(NULL, buffer_size, buffer);
397 if (!request)
398 return (-1);
400 service_process_request(request);
401 pinba__request__free_unpacked(request, NULL);
403 return (0);
404 } /* }}} int pinba_process_stats_packet */
406 static int pinba_udp_read_callback_fn(int sock) /* {{{ */
407 {
408 uint8_t buffer[PINBA_UDP_BUFFER_SIZE];
409 size_t buffer_size;
410 int status;
412 while (42) {
413 buffer_size = sizeof(buffer);
414 status = recvfrom(sock, buffer, buffer_size - 1, MSG_DONTWAIT,
415 /* from = */ NULL, /* from len = */ 0);
416 if (status < 0) {
417 char errbuf[1024];
419 if ((errno == EINTR)
420 #ifdef EWOULDBLOCK
421 || (errno == EWOULDBLOCK)
422 #endif
423 || (errno == EAGAIN)) {
424 continue;
425 }
427 WARNING("pinba plugin: recvfrom(2) failed: %s",
428 sstrerror(errno, errbuf, sizeof(errbuf)));
429 return (-1);
430 } else if (status == 0) {
431 DEBUG("pinba plugin: recvfrom(2) returned unexpected status zero.");
432 return (-1);
433 } else /* if (status > 0) */
434 {
435 assert(((size_t)status) < buffer_size);
436 buffer_size = (size_t)status;
437 buffer[buffer_size] = 0;
439 status = pinba_process_stats_packet(buffer, buffer_size);
440 if (status != 0)
441 DEBUG("pinba plugin: Parsing packet failed.");
442 return (status);
443 }
444 } /* while (42) */
446 /* not reached */
447 assert(23 == 42);
448 return (-1);
449 } /* }}} void pinba_udp_read_callback_fn */
451 static int receive_loop(void) /* {{{ */
452 {
453 pinba_socket_t *s;
455 s = pinba_socket_open(conf_node, conf_service);
456 if (s == NULL) {
457 ERROR("pinba plugin: Collector thread is exiting prematurely.");
458 return (-1);
459 }
461 while (!collector_thread_do_shutdown) {
462 int status;
464 if (s->fd_num < 1)
465 break;
467 status = poll(s->fd, s->fd_num, /* timeout = */ 1000);
468 if (status == 0) /* timeout */
469 {
470 continue;
471 } else if (status < 0) {
472 char errbuf[1024];
474 if ((errno == EINTR) || (errno == EAGAIN))
475 continue;
477 ERROR("pinba plugin: poll(2) failed: %s",
478 sstrerror(errno, errbuf, sizeof(errbuf)));
479 pinba_socket_free(s);
480 return (-1);
481 }
483 for (nfds_t i = 0; i < s->fd_num; i++) {
484 if (s->fd[i].revents & (POLLERR | POLLHUP | POLLNVAL)) {
485 pb_del_socket(s, i);
486 i--;
487 } else if (s->fd[i].revents & (POLLIN | POLLPRI)) {
488 pinba_udp_read_callback_fn(s->fd[i].fd);
489 }
490 } /* for (s->fd) */
491 } /* while (!collector_thread_do_shutdown) */
493 pinba_socket_free(s);
494 s = NULL;
496 return (0);
497 } /* }}} int receive_loop */
499 static void *collector_thread(void *arg) /* {{{ */
500 {
501 receive_loop();
503 memset(&collector_thread_id, 0, sizeof(collector_thread_id));
504 collector_thread_running = 0;
505 pthread_exit(NULL);
506 return (NULL);
507 } /* }}} void *collector_thread */
509 /*
510 * Plugin declaration section
511 */
512 static int pinba_config_view(const oconfig_item_t *ci) /* {{{ */
513 {
514 char *name = NULL;
515 char *host = NULL;
516 char *server = NULL;
517 char *script = NULL;
518 int status;
520 status = cf_util_get_string(ci, &name);
521 if (status != 0)
522 return (status);
524 for (int i = 0; i < ci->children_num; i++) {
525 oconfig_item_t *child = ci->children + i;
527 if (strcasecmp("Host", child->key) == 0)
528 status = cf_util_get_string(child, &host);
529 else if (strcasecmp("Server", child->key) == 0)
530 status = cf_util_get_string(child, &server);
531 else if (strcasecmp("Script", child->key) == 0)
532 status = cf_util_get_string(child, &script);
533 else {
534 WARNING("pinba plugin: Unknown config option: %s", child->key);
535 status = -1;
536 }
538 if (status != 0)
539 break;
540 }
542 if (status == 0)
543 service_statnode_add(name, host, server, script);
545 sfree(name);
546 sfree(host);
547 sfree(server);
548 sfree(script);
550 return (status);
551 } /* }}} int pinba_config_view */
553 static int plugin_config(oconfig_item_t *ci) /* {{{ */
554 {
555 /* The lock should not be necessary in the config callback, but let's be
556 * sure.. */
557 pthread_mutex_lock(&stat_nodes_lock);
559 for (int i = 0; i < ci->children_num; i++) {
560 oconfig_item_t *child = ci->children + i;
562 if (strcasecmp("Address", child->key) == 0)
563 cf_util_get_string(child, &conf_node);
564 else if (strcasecmp("Port", child->key) == 0)
565 cf_util_get_service(child, &conf_service);
566 else if (strcasecmp("View", child->key) == 0)
567 pinba_config_view(child);
568 else
569 WARNING("pinba plugin: Unknown config option: %s", child->key);
570 }
572 pthread_mutex_unlock(&stat_nodes_lock);
574 return (0);
575 } /* }}} int pinba_config */
577 static int plugin_init(void) /* {{{ */
578 {
579 int status;
581 if (stat_nodes == NULL) {
582 /* Collect the "total" data by default. */
583 service_statnode_add("total",
584 /* host = */ NULL,
585 /* server = */ NULL,
586 /* script = */ NULL);
587 }
589 if (collector_thread_running)
590 return (0);
592 status = plugin_thread_create(&collector_thread_id,
593 /* attrs = */ NULL, collector_thread,
594 /* args = */ NULL, "pinba collector");
595 if (status != 0) {
596 char errbuf[1024];
597 ERROR("pinba plugin: pthread_create(3) failed: %s",
598 sstrerror(errno, errbuf, sizeof(errbuf)));
599 return (-1);
600 }
601 collector_thread_running = 1;
603 return (0);
604 } /* }}} */
606 static int plugin_shutdown(void) /* {{{ */
607 {
608 if (collector_thread_running) {
609 int status;
611 DEBUG("pinba plugin: Shutting down collector thread.");
612 collector_thread_do_shutdown = 1;
614 status = pthread_join(collector_thread_id, /* retval = */ NULL);
615 if (status != 0) {
616 char errbuf[1024];
617 ERROR("pinba plugin: pthread_join(3) failed: %s",
618 sstrerror(status, errbuf, sizeof(errbuf)));
619 }
621 collector_thread_running = 0;
622 collector_thread_do_shutdown = 0;
623 } /* if (collector_thread_running) */
625 return (0);
626 } /* }}} int plugin_shutdown */
628 static int plugin_submit(const pinba_statnode_t *res) /* {{{ */
629 {
630 value_list_t vl = VALUE_LIST_INIT;
632 vl.values_len = 1;
633 sstrncpy(vl.plugin, "pinba", sizeof(vl.plugin));
634 sstrncpy(vl.plugin_instance, res->name, sizeof(vl.plugin_instance));
636 vl.values = &(value_t){.derive = res->req_count};
637 sstrncpy(vl.type, "total_requests", sizeof(vl.type));
638 plugin_dispatch_values(&vl);
640 vl.values = &(value_t){
641 .derive = float_counter_get(&res->req_time, /* factor = */ 1000)};
642 sstrncpy(vl.type, "total_time_in_ms", sizeof(vl.type));
643 plugin_dispatch_values(&vl);
645 vl.values = &(value_t){.derive = res->doc_size};
646 sstrncpy(vl.type, "total_bytes", sizeof(vl.type));
647 plugin_dispatch_values(&vl);
649 vl.values = &(value_t){
650 .derive = float_counter_get(&res->ru_utime, /* factor = */ 100)};
651 sstrncpy(vl.type, "cpu", sizeof(vl.type));
652 sstrncpy(vl.type_instance, "user", sizeof(vl.type_instance));
653 plugin_dispatch_values(&vl);
655 vl.values = &(value_t){
656 .derive = float_counter_get(&res->ru_stime, /* factor = */ 100)};
657 sstrncpy(vl.type, "cpu", sizeof(vl.type));
658 sstrncpy(vl.type_instance, "system", sizeof(vl.type_instance));
659 plugin_dispatch_values(&vl);
661 vl.values = &(value_t){.gauge = res->mem_peak};
662 sstrncpy(vl.type, "memory", sizeof(vl.type));
663 sstrncpy(vl.type_instance, "peak", sizeof(vl.type_instance));
664 plugin_dispatch_values(&vl);
666 return (0);
667 } /* }}} int plugin_submit */
669 static int plugin_read(void) /* {{{ */
670 {
671 unsigned int i = 0;
672 pinba_statnode_t data;
674 while ((i = service_statnode_collect(&data, i)) != 0) {
675 plugin_submit(&data);
676 }
678 return 0;
679 } /* }}} int plugin_read */
681 void module_register(void) /* {{{ */
682 {
683 plugin_register_complex_config("pinba", plugin_config);
684 plugin_register_init("pinba", plugin_init);
685 plugin_register_read("pinba", plugin_read);
686 plugin_register_shutdown("pinba", plugin_shutdown);
687 } /* }}} void module_register */
689 /* vim: set sw=2 sts=2 et fdm=marker : */