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  **/
  22
  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                          N
  63  * n_wrk_create         N worker threads created                  N
  64  * n_wrk_failed         N worker threads not created              N
  65  * n_wrk_max            N worker threads limited                  N
  66  * n_wrk_queue          N queued work requests                    N
  67  * n_wrk_overflow       N overflowed work requests                N
  68  * n_wrk_drop           N dropped work requests                   N
  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"
 131
 132 #include <varnish/varnishapi.h>
 133
 134 /* {{{ user_config_s */
 135 struct user_config_s {
 136         char *instance;
 137
 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 };
 150 typedef struct user_config_s user_config_t; /* }}} */
 151
 152 static _Bool have_instance = 0;
 153
 154 static int varnish_submit (const char *plugin_instance, /* {{{ */
 155                 const char *type, const char *type_instance, value_t value)
 156 {
 157         value_list_t vl = VALUE_LIST_INIT;
 158
 159         vl.values = &value;
 160         vl.values_len = 1;
 161
 162         sstrncpy(vl.host, hostname_g, sizeof(vl.host));
 163
 164         sstrncpy(vl.plugin, "varnish", sizeof(vl.plugin));
 165         if (plugin_instance != NULL)
 166                 sstrncpy (vl.plugin_instance, plugin_instance,
 167                                 sizeof (vl.plugin_instance));
 168
 169         sstrncpy(vl.type, type, sizeof(vl.type));
 170         if (type_instance != NULL)
 171                 sstrncpy(vl.type_instance, type_instance,
 172                                 sizeof(vl.type_instance));
 173
 174         return (plugin_dispatch_values(&vl));
 175 } /* }}} int varnish_submit */
 176
 177 static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
 178                 const char *type, const char *type_instance,
 179                 uint64_t gauge_value)
 180 {
 181         value_t value;
 182
 183         value.gauge = (gauge_t) gauge_value;
 184
 185         return (varnish_submit (plugin_instance, type, type_instance, value));
 186 } /* }}} int varnish_submit_gauge */
 187
 188 static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
 189                 const char *type, const char *type_instance,
 190                 uint64_t derive_value)
 191 {
 192         value_t value;
 193
 194         value.derive = (derive_t) derive_value;
 195
 196         return (varnish_submit (plugin_instance, type, type_instance, value));
 197 } /* }}} int varnish_submit_derive */
 198
 199 static void varnish_monitor(const user_config_t *conf, struct varnish_stats *VSL_stats) /* {{{ */
 200 {
 201         if(conf->collect_cache)
 202         {
 203                 /* Cache hits */
 204                 varnish_submit_derive (conf->instance, "cache_result", "hit"    , VSL_stats->cache_hit);
 205                 /* Cache misses */
 206                 varnish_submit_derive (conf->instance, "cache_result", "miss"   , VSL_stats->cache_miss);
 207                 /* Cache hits for pass */
 208                 varnish_submit_derive (conf->instance, "cache_result", "hitpass", VSL_stats->cache_hitpass);
 209         }
 210
 211         if(conf->collect_connections)
 212         {
 213                 /* Client connections accepted */
 214                 varnish_submit_derive (conf->instance, "connections", "client-accepted", VSL_stats->client_conn);
 215                 /* Connection dropped, no sess */
 216                 varnish_submit_derive (conf->instance, "connections", "client-dropped" , VSL_stats->client_drop);
 217                 /* Client requests received    */
 218                 varnish_submit_derive (conf->instance, "connections", "client-received", VSL_stats->client_req);
 219         }
 220
 221         if(conf->collect_esi)
 222         {
 223                 /* Objects ESI parsed (unlock) */
 224                 varnish_submit_derive (conf->instance, "total_operations", "esi-parsed", VSL_stats->esi_parse);
 225                 /* ESI parse errors (unlock)   */
 226                 varnish_submit_derive (conf->instance, "total_operations", "esi-error", VSL_stats->esi_errors);
 227         }
 228
 229         if(conf->collect_backend)
 230         {
 231                 /* Backend conn. success       */
 232                 varnish_submit_derive (conf->instance, "connections", "backend-success"      , VSL_stats->backend_conn);
 233                 /* Backend conn. not attempted */
 234                 varnish_submit_derive (conf->instance, "connections", "backend-not-attempted", VSL_stats->backend_unhealthy);
 235                 /* Backend conn. too many      */
 236                 varnish_submit_derive (conf->instance, "connections", "backend-too-many"     , VSL_stats->backend_busy);
 237                 /* Backend conn. failures      */
 238                 varnish_submit_derive (conf->instance, "connections", "backend-failures"     , VSL_stats->backend_fail);
 239                 /* Backend conn. reuses        */
 240                 varnish_submit_derive (conf->instance, "connections", "backend-reuses"       , VSL_stats->backend_reuse);
 241                 /* Backend conn. was closed    */
 242                 varnish_submit_derive (conf->instance, "connections", "backend-was-closed"   , VSL_stats->backend_toolate);
 243                 /* Backend conn. recycles      */
 244                 varnish_submit_derive (conf->instance, "connections", "backend-recycled"     , VSL_stats->backend_recycle);
 245                 /* Backend conn. unused        */
 246                 varnish_submit_derive (conf->instance, "connections", "backend-unused"       , VSL_stats->backend_unused);
 247         }
 248
 249         if(conf->collect_fetch)
 250         {
 251                 /* Fetch head                */
 252                 varnish_submit_derive (conf->instance, "http_requests", "fetch-head"       , VSL_stats->fetch_head);
 253                 /* Fetch with length         */
 254                 varnish_submit_derive (conf->instance, "http_requests", "fetch-length"     , VSL_stats->fetch_length);
 255                 /* Fetch chunked             */
 256                 varnish_submit_derive (conf->instance, "http_requests", "fetch-chunked"    , VSL_stats->fetch_chunked);
 257                 /* Fetch EOF                 */
 258                 varnish_submit_derive (conf->instance, "http_requests", "fetch-eof"        , VSL_stats->fetch_eof);
 259                 /* Fetch bad headers         */
 260                 varnish_submit_derive (conf->instance, "http_requests", "fetch-bad_headers", VSL_stats->fetch_bad);
 261                 /* Fetch wanted close        */
 262                 varnish_submit_derive (conf->instance, "http_requests", "fetch-close"      , VSL_stats->fetch_close);
 263                 /* Fetch pre HTTP/1.1 closed */
 264                 varnish_submit_derive (conf->instance, "http_requests", "fetch-oldhttp"    , VSL_stats->fetch_oldhttp);
 265                 /* Fetch zero len            */
 266                 varnish_submit_derive (conf->instance, "http_requests", "fetch-zero"       , VSL_stats->fetch_zero);
 267                 /* Fetch failed              */
 268                 varnish_submit_derive (conf->instance, "http_requests", "fetch-failed"     , VSL_stats->fetch_failed);
 269         }
 270
 271         if(conf->collect_hcb)
 272         {
 273                 /* HCB Lookups without lock */
 274                 varnish_submit_derive (conf->instance, "cache_operation", "lookup_nolock", VSL_stats->hcb_nolock);
 275                 /* HCB Lookups with lock    */
 276                 varnish_submit_derive (conf->instance, "cache_operation", "lookup_lock",   VSL_stats->hcb_lock);
 277                 /* HCB Inserts              */
 278                 varnish_submit_derive (conf->instance, "cache_operation", "insert",        VSL_stats->hcb_insert);
 279         }
 280
 281         if(conf->collect_shm)
 282         {
 283                 /* SHM records                 */
 284                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-records"   , VSL_stats->shm_records);
 285                 /* SHM writes                  */
 286                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-writes"    , VSL_stats->shm_writes);
 287                 /* SHM flushes due to overflow */
 288                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-flushes"   , VSL_stats->shm_flushes);
 289                 /* SHM MTX contention          */
 290                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-contention", VSL_stats->shm_cont);
 291                 /* SHM cycles through buffer   */
 292                 varnish_submit_derive (conf->instance, "total_operations", "shmlog-cycles"    , VSL_stats->shm_cycles);
 293         }
 294
 295         if(conf->collect_sm)
 296         {
 297                 /* allocator requests */
 298                 varnish_submit_derive (conf->instance, "total_requests", "storage-file",      VSL_stats->sm_nreq);
 299                 /* outstanding allocations */
 300                 varnish_submit_gauge (conf->instance, "requests", "storage-file-outstanding", VSL_stats->sm_nobj);
 301                 /* bytes allocated */
 302                 varnish_submit_gauge (conf->instance, "bytes", "storage-file-allocated",      VSL_stats->sm_balloc);
 303                 /* bytes free */
 304                 varnish_submit_gauge (conf->instance, "bytes", "storage-file-free",           VSL_stats->sm_bfree);
 305         }
 306
 307         if(conf->collect_sma)
 308         {
 309                 /* SMA allocator requests */
 310                 varnish_submit_derive (conf->instance, "total_requests", "storage-mem",      VSL_stats->sma_nreq);
 311                 /* SMA outstanding allocations */
 312                 varnish_submit_gauge (conf->instance, "requests", "storage-mem-outstanding", VSL_stats->sma_nobj);
 313                 /* SMA outstanding bytes */
 314                 varnish_submit_gauge (conf->instance, "bytes", "storage-mem-outstanding",    VSL_stats->sma_nbytes);
 315                 /* SMA bytes allocated */
 316                 varnish_submit_gauge (conf->instance, "bytes", "storage-mem-allocated",      VSL_stats->sma_balloc);
 317                 /* SMA bytes free */
 318                 varnish_submit_gauge (conf->instance, "bytes", "storage-mem-free" ,          VSL_stats->sma_bfree);
 319         }
 320
 321         if(conf->collect_sms)
 322         {
 323                 /* SMS allocator requests */
 324                 varnish_submit_derive (conf->instance, "total_requests", "storage-synth",      VSL_stats->sms_nreq);
 325                 /* SMS outstanding allocations */
 326                 varnish_submit_gauge (conf->instance, "requests", "storage-synth-outstanding", VSL_stats->sms_nobj);
 327                 /* SMS outstanding bytes */
 328                 varnish_submit_gauge (conf->instance, "bytes", "storage-synth-outstanding",    VSL_stats->sms_nbytes);
 329                 /* SMS bytes allocated */
 330                 varnish_submit_gauge (conf->instance, "bytes", "storage-synth-allocated",      VSL_stats->sms_balloc);
 331                 /* SMS bytes freed */
 332                 varnish_submit_gauge (conf->instance, "bytes", "storage-synth-free",           VSL_stats->sms_bfree);
 333         }
 334
 335         if(conf->collect_totals)
 336         {
 337                 /* Total Sessions */
 338                 varnish_submit_derive (conf->instance, "total_counters", "sessions", VSL_stats->s_sess);
 339                 /* Total Requests */
 340                 varnish_submit_derive (conf->instance, "total_requests", "requests", VSL_stats->s_req);
 341                 /* Total pipe */
 342                 varnish_submit_derive (conf->instance, "total_operations", "pipe", VSL_stats->s_pipe);
 343                 /* Total pass */
 344                 varnish_submit_derive (conf->instance, "total_operations", "pass", VSL_stats->s_pass);
 345                 /* Total fetch */
 346                 varnish_submit_derive (conf->instance, "total_operations", "fetches", VSL_stats->s_fetch);
 347                 /* Total header bytes */
 348                 varnish_submit_derive (conf->instance, "total_bytes", "header-bytes", VSL_stats->s_hdrbytes);
 349                 /* Total body byte */
 350                 varnish_submit_derive (conf->instance, "total_bytes", "body-bytes", VSL_stats->s_bodybytes);
 351         }
 352 } /* }}} void varnish_monitor */
 353
 354 static int varnish_read(user_data_t *ud) /* {{{ */
 355 {
 356         struct varnish_stats *VSL_stats;
 357         user_config_t *conf;
 358
 359         if ((ud == NULL) || (ud->data == NULL))
 360                 return (EINVAL);
 361
 362         conf = ud->data;
 363
 364         VSL_stats = VSL_OpenStats(conf->instance);
 365         if (VSL_stats == NULL)
 366         {
 367                 ERROR("Varnish plugin : unable to load statistics");
 368
 369                 return (-1);
 370         }
 371
 372         varnish_monitor(conf, VSL_stats);
 373
 374     return (0);
 375 } /* }}} */
 376
 377 static void varnish_config_free (void *ptr) /* {{{ */
 378 {
 379         user_config_t *conf = ptr;
 380
 381         if (conf == NULL)
 382                 return;
 383
 384         sfree (conf->instance);
 385         sfree (conf);
 386 } /* }}} */
 387
 388 static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
 389 {
 390         if (conf == NULL)
 391                 return (EINVAL);
 392
 393         conf->collect_backend     = 1;
 394         conf->collect_cache       = 1;
 395         conf->collect_connections = 1;
 396         conf->collect_esi         = 0;
 397         conf->collect_fetch       = 0;
 398         conf->collect_hcb         = 0;
 399         conf->collect_shm         = 1;
 400         conf->collect_sm          = 0;
 401         conf->collect_sma         = 0;
 402         conf->collect_sms         = 0;
 403         conf->collect_totals      = 0;
 404
 405         return (0);
 406 } /* }}} int varnish_config_apply_default */
 407
 408 static int varnish_init (void) /* {{{ */
 409 {
 410         user_config_t *conf;
 411         user_data_t ud;
 412
 413         if (have_instance)
 414                 return (0);
 415
 416         conf = malloc (sizeof (*conf));
 417         if (conf == NULL)
 418                 return (ENOMEM);
 419         memset (conf, 0, sizeof (*conf));
 420
 421         /* Default settings: */
 422         conf->instance = NULL;
 423
 424         varnish_config_apply_default (conf);
 425
 426         ud.data = conf;
 427         ud.free_func = varnish_config_free;
 428
 429         plugin_register_complex_read (/* group = */ "varnish",
 430                         /* name      = */ "varnish/localhost",
 431                         /* callback  = */ varnish_read,
 432                         /* interval  = */ NULL,
 433                         /* user data = */ &ud);
 434
 435         return (0);
 436 } /* }}} int varnish_init */
 437
 438 static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
 439 {
 440         user_config_t *conf;
 441         user_data_t ud;
 442         char callback_name[DATA_MAX_NAME_LEN];
 443         int i;
 444
 445         conf = malloc (sizeof (*conf));
 446         if (conf == NULL)
 447                 return (ENOMEM);
 448         memset (conf, 0, sizeof (*conf));
 449         conf->instance = NULL;
 450
 451         varnish_config_apply_default (conf);
 452
 453         if (ci->values_num == 1)
 454         {
 455                 int status;
 456
 457                 status = cf_util_get_string (ci, &conf->instance);
 458                 if (status != 0)
 459                 {
 460                         sfree (conf);
 461                         return (status);
 462                 }
 463                 assert (conf->instance != NULL);
 464
 465                 if (strcmp ("localhost", conf->instance) == 0)
 466                 {
 467                         sfree (conf->instance);
 468                         conf->instance = NULL;
 469                 }
 470         }
 471         else if (ci->values_num > 1)
 472         {
 473                 WARNING ("Varnish plugin: \"Instance\" blocks accept only "
 474                                 "one argument.");
 475                 return (EINVAL);
 476         }
 477
 478         for (i = 0; i < ci->children_num; i++)
 479         {
 480                 oconfig_item_t *child = ci->children + i;
 481
 482                 if (strcasecmp ("CollectCache", child->key) == 0)
 483                         cf_util_get_boolean (child, &conf->collect_cache);
 484                 else if (strcasecmp ("CollectConnections", child->key) == 0)
 485                         cf_util_get_boolean (child, &conf->collect_connections);
 486                 else if (strcasecmp ("CollectESI", child->key) == 0)
 487                         cf_util_get_boolean (child, &conf->collect_esi);
 488                 else if (strcasecmp ("CollectBackend", child->key) == 0)
 489                         cf_util_get_boolean (child, &conf->collect_backend);
 490                 else if (strcasecmp ("CollectFetch", child->key) == 0)
 491                         cf_util_get_boolean (child, &conf->collect_fetch);
 492                 else if (strcasecmp ("CollectHCB", child->key) == 0)
 493                         cf_util_get_boolean (child, &conf->collect_hcb);
 494                 else if (strcasecmp ("CollectSHM", child->key) == 0)
 495                         cf_util_get_boolean (child, &conf->collect_shm);
 496                 else if (strcasecmp ("CollectSMA", child->key) == 0)
 497                         cf_util_get_boolean (child, &conf->collect_sma);
 498                 else if (strcasecmp ("CollectSMS", child->key) == 0)
 499                         cf_util_get_boolean (child, &conf->collect_sms);
 500                 else if (strcasecmp ("CollectSM", child->key) == 0)
 501                         cf_util_get_boolean (child, &conf->collect_sm);
 502                 else if (strcasecmp ("CollectTotals", child->key) == 0)
 503                         cf_util_get_boolean (child, &conf->collect_totals);
 504                 else
 505                 {
 506                         WARNING ("Varnish plugin: Ignoring unknown "
 507                                         "configuration option: \"%s\"",
 508                                         child->key);
 509                 }
 510         }
 511
 512         if (!conf->collect_cache
 513                         && !conf->collect_connections
 514                         && !conf->collect_esi
 515                         && !conf->collect_backend
 516                         && !conf->collect_fetch
 517                         && !conf->collect_hcb
 518                         && !conf->collect_shm
 519                         && !conf->collect_sma
 520                         && !conf->collect_sms
 521                         && !conf->collect_sm
 522                         && !conf->collect_totals)
 523         {
 524                 WARNING ("Varnish plugin: No metric has been configured for "
 525                                 "instance \"%s\". Disabling this instance.",
 526                                 (conf->instance == NULL) ? "localhost" : conf->instance);
 527                 return (EINVAL);
 528         }
 529
 530         ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
 531                         (conf->instance == NULL) ? "localhost" : conf->instance);
 532
 533         ud.data = conf;
 534         ud.free_func = varnish_config_free;
 535
 536         plugin_register_complex_read (/* group = */ "varnish",
 537                         /* name      = */ callback_name,
 538                         /* callback  = */ varnish_read,
 539                         /* interval  = */ NULL,
 540                         /* user data = */ &ud);
 541
 542         have_instance = 1;
 543
 544         return (0);
 545 } /* }}} int varnish_config_instance */
 546
 547 static int varnish_config (oconfig_item_t *ci) /* {{{ */
 548 {
 549         int i;
 550
 551         for (i = 0; i < ci->children_num; i++)
 552         {
 553                 oconfig_item_t *child = ci->children + i;
 554
 555                 if (strcasecmp ("Instance", child->key) == 0)
 556                         varnish_config_instance (child);
 557                 else
 558                 {
 559                         WARNING ("Varnish plugin: Ignoring unknown "
 560                                         "configuration option: \"%s\"",
 561                                         child->key);
 562                 }
 563         }
 564
 565         return (0);
 566 } /* }}} int varnish_config */
 567
 568 void module_register (void) /* {{{ */
 569 {
 570         plugin_register_complex_config("varnish", varnish_config);
 571         plugin_register_init ("varnish", varnish_init);
 572 } /* }}} */
 573
 574 /* vim: set sw=8 noet fdm=marker : */