Code

collectd-nagios: Implement the "-m" option (treat NaNs as critical).
[collectd.git] / src / varnish.c
1 /**
2  * collectd - src/varnish.c
3  * Copyright (C) 2010 Jerome Renard
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by the
7  * Free Software Foundation; only version 2 of the License is applicable.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
17  *
18  * Authors:
19  *   Florian octo Forster <octo at verplant.org>
20  *   Jerome Renard <jerome.renard@gmail.com>
21  **/
23 /**
24  * Current list of what is monitored and what is not monitored (yet)
25  * {{{
26  * Field name           Description                           Monitored
27  * ----------           -----------                           ---------
28  * uptime               Child uptime                              N
29  * client_conn          Client connections accepted               Y
30  * client_drop          Connection dropped, no sess               Y
31  * client_req           Client requests received                  Y
32  * cache_hit            Cache hits                                Y
33  * cache_hitpass        Cache hits for pass                       Y
34  * cache_miss           Cache misses                              Y
35  * backend_conn         Backend conn. success                     Y
36  * backend_unhealthy    Backend conn. not attempted               Y
37  * backend_busy         Backend conn. too many                    Y
38  * backend_fail         Backend conn. failures                    Y
39  * backend_reuse        Backend conn. reuses                      Y
40  * backend_toolate      Backend conn. was closed                  Y
41  * backend_recycle      Backend conn. recycles                    Y
42  * backend_unused       Backend conn. unused                      Y
43  * fetch_head           Fetch head                                Y
44  * fetch_length         Fetch with Length                         Y
45  * fetch_chunked        Fetch chunked                             Y
46  * fetch_eof            Fetch EOF                                 Y
47  * fetch_bad            Fetch had bad headers                     Y
48  * fetch_close          Fetch wanted close                        Y
49  * fetch_oldhttp        Fetch pre HTTP/1.1 closed                 Y
50  * fetch_zero           Fetch zero len                            Y
51  * fetch_failed         Fetch failed                              Y
52  * n_sess_mem           N struct sess_mem                         N
53  * n_sess               N struct sess                             N
54  * n_object             N struct object                           N
55  * n_vampireobject      N unresurrected objects                   N
56  * n_objectcore         N struct objectcore                       N
57  * n_objecthead         N struct objecthead                       N
58  * n_smf                N struct smf                              N
59  * n_smf_frag           N small free smf                          N
60  * n_smf_large          N large free smf                          N
61  * n_vbe_conn           N struct vbe_conn                         N
62  * n_wrk                N worker threads                          Y
63  * n_wrk_create         N worker threads created                  Y
64  * n_wrk_failed         N worker threads not created              Y
65  * n_wrk_max            N worker threads limited                  Y
66  * n_wrk_queue          N queued work requests                    Y
67  * n_wrk_overflow       N overflowed work requests                Y
68  * n_wrk_drop           N dropped work requests                   Y
69  * n_backend            N backends                                N
70  * n_expired            N expired objects                         N
71  * n_lru_nuked          N LRU nuked objects                       N
72  * n_lru_saved          N LRU saved objects                       N
73  * n_lru_moved          N LRU moved objects                       N
74  * n_deathrow           N objects on deathrow                     N
75  * losthdr              HTTP header overflows                     N
76  * n_objsendfile        Objects sent with sendfile                N
77  * n_objwrite           Objects sent with write                   N
78  * n_objoverflow        Objects overflowing workspace             N
79  * s_sess               Total Sessions                            Y
80  * s_req                Total Requests                            Y
81  * s_pipe               Total pipe                                Y
82  * s_pass               Total pass                                Y
83  * s_fetch              Total fetch                               Y
84  * s_hdrbytes           Total header bytes                        Y
85  * s_bodybytes          Total body bytes                          Y
86  * sess_closed          Session Closed                            N
87  * sess_pipeline        Session Pipeline                          N
88  * sess_readahead       Session Read Ahead                        N
89  * sess_linger          Session Linger                            N
90  * sess_herd            Session herd                              N
91  * shm_records          SHM records                               Y
92  * shm_writes           SHM writes                                Y
93  * shm_flushes          SHM flushes due to overflow               Y
94  * shm_cont             SHM MTX contention                        Y
95  * shm_cycles           SHM cycles through buffer                 Y
96  * sm_nreq              allocator requests                        Y
97  * sm_nobj              outstanding allocations                   Y
98  * sm_balloc            bytes allocated                           Y
99  * sm_bfree             bytes free                                Y
100  * sma_nreq             SMA allocator requests                    Y
101  * sma_nobj             SMA outstanding allocations               Y
102  * sma_nbytes           SMA outstanding bytes                     Y
103  * sma_balloc           SMA bytes allocated                       Y
104  * sma_bfree            SMA bytes free                            Y
105  * sms_nreq             SMS allocator requests                    Y
106  * sms_nobj             SMS outstanding allocations               Y
107  * sms_nbytes           SMS outstanding bytes                     Y
108  * sms_balloc           SMS bytes allocated                       Y
109  * sms_bfree            SMS bytes freed                           Y
110  * backend_req          Backend requests made                     N
111  * n_vcl                N vcl total                               N
112  * n_vcl_avail          N vcl available                           N
113  * n_vcl_discard        N vcl discarded                           N
114  * n_purge              N total active purges                     N
115  * n_purge_add          N new purges added                        N
116  * n_purge_retire       N old purges deleted                      N
117  * n_purge_obj_test     N objects tested                          N
118  * n_purge_re_test      N regexps tested against                  N
119  * n_purge_dups         N duplicate purges removed                N
120  * hcb_nolock           HCB Lookups without lock                  Y
121  * hcb_lock             HCB Lookups with lock                     Y
122  * hcb_insert           HCB Inserts                               Y
123  * esi_parse            Objects ESI parsed (unlock)               Y
124  * esi_errors           ESI parse errors (unlock)                 Y
125  * }}}
126  */
127 #include "collectd.h"
128 #include "common.h"
129 #include "plugin.h"
130 #include "configfile.h"
132 #include <varnish/varnishapi.h>
134 /* {{{ user_config_s */
135 struct user_config_s {
136         char *instance;
138         _Bool collect_cache;
139         _Bool collect_connections;
140         _Bool collect_esi;
141         _Bool collect_backend;
142         _Bool collect_fetch;
143         _Bool collect_hcb;
144         _Bool collect_shm;
145         _Bool collect_sma;
146         _Bool collect_sms;
147         _Bool collect_sm;
148         _Bool collect_totals;
149         _Bool collect_workers;
150 };
151 typedef struct user_config_s user_config_t; /* }}} */
153 static _Bool have_instance = 0;
155 static int varnish_submit (const char *plugin_instance, /* {{{ */
156                 const char *type, const char *type_instance, value_t value)
158         value_list_t vl = VALUE_LIST_INIT;
160         vl.values = &value;
161         vl.values_len = 1;
163         sstrncpy(vl.host, hostname_g, sizeof(vl.host));
165         sstrncpy(vl.plugin, "varnish", sizeof(vl.plugin));
166         if (plugin_instance != NULL)
167                 sstrncpy (vl.plugin_instance, plugin_instance,
168                                 sizeof (vl.plugin_instance));
170         sstrncpy(vl.type, type, sizeof(vl.type));
171         if (type_instance != NULL)
172                 sstrncpy(vl.type_instance, type_instance,
173                                 sizeof(vl.type_instance));
175         return (plugin_dispatch_values(&vl));
176 } /* }}} int varnish_submit */
178 static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
179                 const char *type, const char *type_instance,
180                 uint64_t gauge_value)
182         value_t value;
184         value.gauge = (gauge_t) gauge_value;
186         return (varnish_submit (plugin_instance, type, type_instance, value));
187 } /* }}} int varnish_submit_gauge */
189 static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
190                 const char *type, const char *type_instance,
191                 uint64_t derive_value)
193         value_t value;
195         value.derive = (derive_t) derive_value;
197         return (varnish_submit (plugin_instance, type, type_instance, value));
198 } /* }}} int varnish_submit_derive */
200 static void varnish_monitor(const user_config_t *conf, struct varnish_stats *VSL_stats) /* {{{ */
202         if(conf->collect_cache)
203         {
204                 /* Cache hits */
205                 varnish_submit_derive (conf->instance, "cache_result", "hit"    , VSL_stats->cache_hit);
206                 /* Cache misses */
207                 varnish_submit_derive (conf->instance, "cache_result", "miss"   , VSL_stats->cache_miss);
208                 /* Cache hits for pass */
209                 varnish_submit_derive (conf->instance, "cache_result", "hitpass", VSL_stats->cache_hitpass);
210         }
212         if(conf->collect_connections)
213         {
214                 /* Client connections accepted */
215                 varnish_submit_derive (conf->instance, "connections", "client-accepted", VSL_stats->client_conn);
216                 /* Connection dropped, no sess */
217                 varnish_submit_derive (conf->instance, "connections", "client-dropped" , VSL_stats->client_drop);
218                 /* Client requests received    */
219                 varnish_submit_derive (conf->instance, "connections", "client-received", VSL_stats->client_req);
220         }
222         if(conf->collect_esi)
223         {
224                 /* Objects ESI parsed (unlock) */
225                 varnish_submit_derive (conf->instance, "total_operations", "esi-parsed", VSL_stats->esi_parse);
226                 /* ESI parse errors (unlock)   */
227                 varnish_submit_derive (conf->instance, "total_operations", "esi-error", VSL_stats->esi_errors);
228         }
230         if(conf->collect_backend)
231         {
232                 /* Backend conn. success       */
233                 varnish_submit_derive (conf->instance, "connections", "backend-success"      , VSL_stats->backend_conn);
234                 /* Backend conn. not attempted */
235                 varnish_submit_derive (conf->instance, "connections", "backend-not-attempted", VSL_stats->backend_unhealthy);
236                 /* Backend conn. too many      */
237                 varnish_submit_derive (conf->instance, "connections", "backend-too-many"     , VSL_stats->backend_busy);
238                 /* Backend conn. failures      */
239                 varnish_submit_derive (conf->instance, "connections", "backend-failures"     , VSL_stats->backend_fail);
240                 /* Backend conn. reuses        */
241                 varnish_submit_derive (conf->instance, "connections", "backend-reuses"       , VSL_stats->backend_reuse);
242                 /* Backend conn. was closed    */
243                 varnish_submit_derive (conf->instance, "connections", "backend-was-closed"   , VSL_stats->backend_toolate);
244                 /* Backend conn. recycles      */
245                 varnish_submit_derive (conf->instance, "connections", "backend-recycled"     , VSL_stats->backend_recycle);
246                 /* Backend conn. unused        */
247                 varnish_submit_derive (conf->instance, "connections", "backend-unused"       , VSL_stats->backend_unused);
248         }
250         if(conf->collect_fetch)
251         {
252                 /* Fetch head                */
253                 varnish_submit_derive (conf->instance, "http_requests", "fetch-head"       , VSL_stats->fetch_head);
254                 /* Fetch with length         */
255                 varnish_submit_derive (conf->instance, "http_requests", "fetch-length"     , VSL_stats->fetch_length);
256                 /* Fetch chunked             */
257                 varnish_submit_derive (conf->instance, "http_requests", "fetch-chunked"    , VSL_stats->fetch_chunked);
258                 /* Fetch EOF                 */
259                 varnish_submit_derive (conf->instance, "http_requests", "fetch-eof"        , VSL_stats->fetch_eof);
260                 /* Fetch bad headers         */
261                 varnish_submit_derive (conf->instance, "http_requests", "fetch-bad_headers", VSL_stats->fetch_bad);
262                 /* Fetch wanted close        */
263                 varnish_submit_derive (conf->instance, "http_requests", "fetch-close"      , VSL_stats->fetch_close);
264                 /* Fetch pre HTTP/1.1 closed */
265                 varnish_submit_derive (conf->instance, "http_requests", "fetch-oldhttp"    , VSL_stats->fetch_oldhttp);
266                 /* Fetch zero len            */
267                 varnish_submit_derive (conf->instance, "http_requests", "fetch-zero"       , VSL_stats->fetch_zero);
268                 /* Fetch failed              */
269                 varnish_submit_derive (conf->instance, "http_requests", "fetch-failed"     , VSL_stats->fetch_failed);
270         }
272         if(conf->collect_hcb)
273         {
274                 /* HCB Lookups without lock */
275                 varnish_submit_derive (conf->instance, "cache_operation", "lookup_nolock", VSL_stats->hcb_nolock);
276                 /* HCB Lookups with lock    */
277                 varnish_submit_derive (conf->instance, "cache_operation", "lookup_lock",   VSL_stats->hcb_lock);
278                 /* HCB Inserts              */
279                 varnish_submit_derive (conf->instance, "cache_operation", "insert",        VSL_stats->hcb_insert);
280         }
282         if(conf->collect_shm)
283         {
284                 /* SHM records                 */
285                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-records"   , VSL_stats->shm_records);
286                 /* SHM writes                  */
287                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-writes"    , VSL_stats->shm_writes);
288                 /* SHM flushes due to overflow */
289                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-flushes"   , VSL_stats->shm_flushes);
290                 /* SHM MTX contention          */
291                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-contention", VSL_stats->shm_cont);
292                 /* SHM cycles through buffer   */
293                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-cycles"    , VSL_stats->shm_cycles);
294         }
296         if(conf->collect_sm)
297         {
298                 /* allocator requests */
299                 varnish_submit_derive (conf->instance, "total_requests", "storage-file",      VSL_stats->sm_nreq);
300                 /* outstanding allocations */
301                 varnish_submit_gauge (conf->instance, "requests", "storage-file-outstanding", VSL_stats->sm_nobj);
302                 /* bytes allocated */
303                 varnish_submit_gauge (conf->instance, "bytes", "storage-file-allocated",      VSL_stats->sm_balloc);
304                 /* bytes free */
305                 varnish_submit_gauge (conf->instance, "bytes", "storage-file-free",           VSL_stats->sm_bfree);
306         }
308         if(conf->collect_sma)
309         {
310                 /* SMA allocator requests */
311                 varnish_submit_derive (conf->instance, "total_requests", "storage-mem",      VSL_stats->sma_nreq);
312                 /* SMA outstanding allocations */
313                 varnish_submit_gauge (conf->instance, "requests", "storage-mem-outstanding", VSL_stats->sma_nobj);
314                 /* SMA outstanding bytes */
315                 varnish_submit_gauge (conf->instance, "bytes", "storage-mem-outstanding",    VSL_stats->sma_nbytes);
316                 /* SMA bytes allocated */
317                 varnish_submit_gauge (conf->instance, "bytes", "storage-mem-allocated",      VSL_stats->sma_balloc);
318                 /* SMA bytes free */
319                 varnish_submit_gauge (conf->instance, "bytes", "storage-mem-free" ,          VSL_stats->sma_bfree);
320         }
322         if(conf->collect_sms)
323         {
324                 /* SMS allocator requests */
325                 varnish_submit_derive (conf->instance, "total_requests", "storage-synth",      VSL_stats->sms_nreq);
326                 /* SMS outstanding allocations */
327                 varnish_submit_gauge (conf->instance, "requests", "storage-synth-outstanding", VSL_stats->sms_nobj);
328                 /* SMS outstanding bytes */
329                 varnish_submit_gauge (conf->instance, "bytes", "storage-synth-outstanding",    VSL_stats->sms_nbytes);
330                 /* SMS bytes allocated */
331                 varnish_submit_gauge (conf->instance, "bytes", "storage-synth-allocated",      VSL_stats->sms_balloc);
332                 /* SMS bytes freed */
333                 varnish_submit_gauge (conf->instance, "bytes", "storage-synth-free",           VSL_stats->sms_bfree);
334         }
336         if(conf->collect_totals)
337         {
338                 /* Total Sessions */
339                 varnish_submit_derive (conf->instance, "total_sessions", "sessions", VSL_stats->s_sess);
340                 /* Total Requests */
341                 varnish_submit_derive (conf->instance, "total_requests", "requests", VSL_stats->s_req);
342                 /* Total pipe */
343                 varnish_submit_derive (conf->instance, "total_operations", "pipe", VSL_stats->s_pipe);
344                 /* Total pass */
345                 varnish_submit_derive (conf->instance, "total_operations", "pass", VSL_stats->s_pass);
346                 /* Total fetch */
347                 varnish_submit_derive (conf->instance, "total_operations", "fetches", VSL_stats->s_fetch);
348                 /* Total header bytes */
349                 varnish_submit_derive (conf->instance, "total_bytes", "header-bytes", VSL_stats->s_hdrbytes);
350                 /* Total body byte */
351                 varnish_submit_derive (conf->instance, "total_bytes", "body-bytes", VSL_stats->s_bodybytes);
352         }
354         if(conf->collect_workers)
355         {
356                 /* worker threads */
357                 varnish_submit_gauge (conf->instance, "threads", "worker", VSL_stats->n_wrk);
358                 /* worker threads created */
359                 varnish_submit_gauge (conf->instance, "total_threads", "threads-created", VSL_stats->n_wrk_create);
360                 /* worker threads not created */
361                 varnish_submit_gauge (conf->instance, "total_threads", "threads-failed", VSL_stats->n_wrk_failed);
362                 /* worker threads limited */
363                 varnish_submit_gauge (conf->instance, "total_threads", "threads-limited", VSL_stats->n_wrk_max);
364                 /* queued work requests */
365                 varnish_submit_gauge (conf->instance, "total_requests", "worker-queued", VSL_stats->n_wrk_queue);
366                 /* overflowed work requests */
367                 varnish_submit_gauge (conf->instance, "total_requests", "worker-overflowed", VSL_stats->n_wrk_overflow);
368                 /* dropped work requests */
369                 varnish_submit_gauge (conf->instance, "total_requests", "worker-dropped", VSL_stats->n_wrk_drop);
370         }
371 } /* }}} void varnish_monitor */
373 static int varnish_read(user_data_t *ud) /* {{{ */
375         struct varnish_stats *VSL_stats;
376         user_config_t *conf;
378         if ((ud == NULL) || (ud->data == NULL))
379                 return (EINVAL);
381         conf = ud->data;
383         VSL_stats = VSL_OpenStats(conf->instance);
384         if (VSL_stats == NULL)
385         {
386                 ERROR("Varnish plugin : unable to load statistics");
388                 return (-1);
389         }
391         varnish_monitor(conf, VSL_stats);
393     return (0);
394 } /* }}} */
396 static void varnish_config_free (void *ptr) /* {{{ */
398         user_config_t *conf = ptr;
400         if (conf == NULL)
401                 return;
403         sfree (conf->instance);
404         sfree (conf);
405 } /* }}} */
407 static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
409         if (conf == NULL)
410                 return (EINVAL);
412         conf->collect_backend     = 1;
413         conf->collect_cache       = 1;
414         conf->collect_connections = 1;
415         conf->collect_esi         = 0;
416         conf->collect_fetch       = 0;
417         conf->collect_hcb         = 0;
418         conf->collect_shm         = 1;
419         conf->collect_sm          = 0;
420         conf->collect_sma         = 0;
421         conf->collect_sms         = 0;
422         conf->collect_totals      = 0;
423         
424         return (0);
425 } /* }}} int varnish_config_apply_default */
427 static int varnish_init (void) /* {{{ */
429         user_config_t *conf;
430         user_data_t ud;
432         if (have_instance)
433                 return (0);
435         conf = malloc (sizeof (*conf));
436         if (conf == NULL)
437                 return (ENOMEM);
438         memset (conf, 0, sizeof (*conf));
440         /* Default settings: */
441         conf->instance = NULL;
443         varnish_config_apply_default (conf);
445         ud.data = conf;
446         ud.free_func = varnish_config_free;
448         plugin_register_complex_read (/* group = */ "varnish",
449                         /* name      = */ "varnish/localhost",
450                         /* callback  = */ varnish_read,
451                         /* interval  = */ NULL,
452                         /* user data = */ &ud);
454         return (0);
455 } /* }}} int varnish_init */
457 static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
459         user_config_t *conf;
460         user_data_t ud;
461         char callback_name[DATA_MAX_NAME_LEN];
462         int i;
464         conf = malloc (sizeof (*conf));
465         if (conf == NULL)
466                 return (ENOMEM);
467         memset (conf, 0, sizeof (*conf));
468         conf->instance = NULL;
470         varnish_config_apply_default (conf);
472         if (ci->values_num == 1)
473         {
474                 int status;
476                 status = cf_util_get_string (ci, &conf->instance);
477                 if (status != 0)
478                 {
479                         sfree (conf);
480                         return (status);
481                 }
482                 assert (conf->instance != NULL);
484                 if (strcmp ("localhost", conf->instance) == 0)
485                 {
486                         sfree (conf->instance);
487                         conf->instance = NULL;
488                 }
489         }
490         else if (ci->values_num > 1)
491         {
492                 WARNING ("Varnish plugin: \"Instance\" blocks accept only "
493                                 "one argument.");
494                 return (EINVAL);
495         }
497         for (i = 0; i < ci->children_num; i++)
498         {
499                 oconfig_item_t *child = ci->children + i;
501                 if (strcasecmp ("CollectCache", child->key) == 0)
502                         cf_util_get_boolean (child, &conf->collect_cache);
503                 else if (strcasecmp ("CollectConnections", child->key) == 0)
504                         cf_util_get_boolean (child, &conf->collect_connections);
505                 else if (strcasecmp ("CollectESI", child->key) == 0)
506                         cf_util_get_boolean (child, &conf->collect_esi);
507                 else if (strcasecmp ("CollectBackend", child->key) == 0)
508                         cf_util_get_boolean (child, &conf->collect_backend);
509                 else if (strcasecmp ("CollectFetch", child->key) == 0)
510                         cf_util_get_boolean (child, &conf->collect_fetch);
511                 else if (strcasecmp ("CollectHCB", child->key) == 0)
512                         cf_util_get_boolean (child, &conf->collect_hcb);
513                 else if (strcasecmp ("CollectSHM", child->key) == 0)
514                         cf_util_get_boolean (child, &conf->collect_shm);
515                 else if (strcasecmp ("CollectSMA", child->key) == 0)
516                         cf_util_get_boolean (child, &conf->collect_sma);
517                 else if (strcasecmp ("CollectSMS", child->key) == 0)
518                         cf_util_get_boolean (child, &conf->collect_sms);
519                 else if (strcasecmp ("CollectSM", child->key) == 0)
520                         cf_util_get_boolean (child, &conf->collect_sm);
521                 else if (strcasecmp ("CollectTotals", child->key) == 0)
522                         cf_util_get_boolean (child, &conf->collect_totals);
523                 else if (strcasecmp ("CollectWorkers", child->key) == 0)
524                         cf_util_get_boolean (child, &conf->collect_workers);
525                 else
526                 {
527                         WARNING ("Varnish plugin: Ignoring unknown "
528                                         "configuration option: \"%s\"",
529                                         child->key);
530                 }
531         }
533         if (!conf->collect_cache
534                         && !conf->collect_connections
535                         && !conf->collect_esi
536                         && !conf->collect_backend
537                         && !conf->collect_fetch
538                         && !conf->collect_hcb
539                         && !conf->collect_shm
540                         && !conf->collect_sma
541                         && !conf->collect_sms
542                         && !conf->collect_sm
543                         && !conf->collect_totals
544                         && !conf->collect_workers)
545         {
546                 WARNING ("Varnish plugin: No metric has been configured for "
547                                 "instance \"%s\". Disabling this instance.",
548                                 (conf->instance == NULL) ? "localhost" : conf->instance);
549                 return (EINVAL);
550         }
552         ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
553                         (conf->instance == NULL) ? "localhost" : conf->instance);
555         ud.data = conf;
556         ud.free_func = varnish_config_free;
558         plugin_register_complex_read (/* group = */ "varnish",
559                         /* name      = */ callback_name,
560                         /* callback  = */ varnish_read,
561                         /* interval  = */ NULL,
562                         /* user data = */ &ud);
564         have_instance = 1;
566         return (0);
567 } /* }}} int varnish_config_instance */
569 static int varnish_config (oconfig_item_t *ci) /* {{{ */
571         int i;
573         for (i = 0; i < ci->children_num; i++)
574         {
575                 oconfig_item_t *child = ci->children + i;
577                 if (strcasecmp ("Instance", child->key) == 0)
578                         varnish_config_instance (child);
579                 else
580                 {
581                         WARNING ("Varnish plugin: Ignoring unknown "
582                                         "configuration option: \"%s\"",
583                                         child->key);
584                 }
585         }
587         return (0);
588 } /* }}} int varnish_config */
590 void module_register (void) /* {{{ */
592         plugin_register_complex_config("varnish", varnish_config);
593         plugin_register_init ("varnish", varnish_init);
594 } /* }}} */
596 /* vim: set sw=8 noet fdm=marker : */