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                          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"
 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         _Bool collect_workers;
 150 };
 151 typedef struct user_config_s user_config_t; /* }}} */
 152
 153 static _Bool have_instance = 0;
 154
 155 static int varnish_submit (const char *plugin_instance, /* {{{ */
 156                 const char *type, const char *type_instance, value_t value)
 157 {
 158         value_list_t vl = VALUE_LIST_INIT;
 159
 160         vl.values = &value;
 161         vl.values_len = 1;
 162
 163         sstrncpy(vl.host, hostname_g, sizeof(vl.host));
 164
 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));
 169
 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));
 174
 175         return (plugin_dispatch_values(&vl));
 176 } /* }}} int varnish_submit */
 177
 178 static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
 179                 const char *type, const char *type_instance,
 180                 uint64_t gauge_value)
 181 {
 182         value_t value;
 183
 184         value.gauge = (gauge_t) gauge_value;
 185
 186         return (varnish_submit (plugin_instance, type, type_instance, value));
 187 } /* }}} int varnish_submit_gauge */
 188
 189 static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
 190                 const char *type, const char *type_instance,
 191                 uint64_t derive_value)
 192 {
 193         value_t value;
 194
 195         value.derive = (derive_t) derive_value;
 196
 197         return (varnish_submit (plugin_instance, type, type_instance, value));
 198 } /* }}} int varnish_submit_derive */
 199
 200 static void varnish_monitor(const user_config_t *conf, struct varnish_stats *VSL_stats) /* {{{ */
 201 {
 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         }
 211
 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         }
 221
 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         }
 229
 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         }
 249
 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         }
 271
 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         }
 281
 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         }
 295
 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         }
 307
 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         }
 321
 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         }
 335
 336         if(conf->collect_totals)
 337         {
 338                 /* Total Sessions */
 339                 varnish_submit_derive (conf->instance, "total_counters", "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         }
 353
 354         if(conf->collect_workers)
 355         {
 356                 /* worker threads */
 357                 varnish_submit_gauge ( conf->instance, "threads", "threads", VSL_stats-> n_wrk );
 358                 /* worker threads created */
 359                 varnish_submit_gauge ( conf->instance , "threads", "threads-created", VSL_stats-> n_wrk_create );
 360                 /* worker threads not created */
 361                 varnish_submit_gauge ( conf->instance, "threads", "threads-failed", VSL_stats-> n_wrk_failed );
 362                 /* worker threads limited */
 363                 varnish_submit_gauge ( conf->instance, "threads", "threads-limited", VSL_stats-> n_wrk_max );
 364                 /* queued work requests */
 365                 varnish_submit_gauge ( conf->instance, "threads", "queued-requests", VSL_stats-> n_wrk_queue );
 366                 /* overflowed work requests */
 367                 varnish_submit_gauge ( conf->instance, "threads", "overflowed-requests", VSL_stats-> n_wrk_overflow );
 368                 /* dropped work requests */
 369                 varnish_submit_gauge ( conf->instance, "threads", "dropped-requests", VSL_stats-> n_wrk_drop );
 370         }
 371 } /* }}} void varnish_monitor */
 372
 373 static int varnish_read(user_data_t *ud) /* {{{ */
 374 {
 375         struct varnish_stats *VSL_stats;
 376         user_config_t *conf;
 377
 378         if ((ud == NULL) || (ud->data == NULL))
 379                 return (EINVAL);
 380
 381         conf = ud->data;
 382
 383         VSL_stats = VSL_OpenStats(conf->instance);
 384         if (VSL_stats == NULL)
 385         {
 386                 ERROR("Varnish plugin : unable to load statistics");
 387
 388                 return (-1);
 389         }
 390
 391         varnish_monitor(conf, VSL_stats);
 392
 393     return (0);
 394 } /* }}} */
 395
 396 static void varnish_config_free (void *ptr) /* {{{ */
 397 {
 398         user_config_t *conf = ptr;
 399
 400         if (conf == NULL)
 401                 return;
 402
 403         sfree (conf->instance);
 404         sfree (conf);
 405 } /* }}} */
 406
 407 static int varnish_init (void) /* {{{ */
 408 {
 409         user_config_t *conf;
 410         user_data_t ud;
 411
 412         if (have_instance)
 413                 return (0);
 414
 415         conf = malloc (sizeof (*conf));
 416         if (conf == NULL)
 417                 return (ENOMEM);
 418         memset (conf, 0, sizeof (*conf));
 419
 420         /* Default settings: */
 421         conf->instance = NULL;
 422         conf->collect_cache = 1;
 423         conf->collect_backend = 1;
 424         conf->collect_connections = 1;
 425         conf->collect_shm = 1;
 426
 427         ud.data = conf;
 428         ud.free_func = varnish_config_free;
 429
 430         plugin_register_complex_read (/* group = */ "varnish",
 431                         /* name      = */ "varnish/localhost",
 432                         /* callback  = */ varnish_read,
 433                         /* interval  = */ NULL,
 434                         /* user data = */ &ud);
 435
 436         return (0);
 437 } /* }}} int varnish_init */
 438
 439 static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
 440 {
 441         user_config_t *conf;
 442         user_data_t ud;
 443         char callback_name[DATA_MAX_NAME_LEN];
 444         int i;
 445
 446         conf = malloc (sizeof (*conf));
 447         if (conf == NULL)
 448                 return (ENOMEM);
 449         memset (conf, 0, sizeof (*conf));
 450         conf->instance = NULL;
 451
 452         if (ci->values_num == 1)
 453         {
 454                 int status;
 455
 456                 status = cf_util_get_string (ci, &conf->instance);
 457                 if (status != 0)
 458                 {
 459                         sfree (conf);
 460                         return (status);
 461                 }
 462                 assert (conf->instance != NULL);
 463
 464                 if (strcmp ("localhost", conf->instance) == 0)
 465                 {
 466                         sfree (conf->instance);
 467                         conf->instance = NULL;
 468                 }
 469         }
 470         else if (ci->values_num > 1)
 471         {
 472                 WARNING ("Varnish plugin: \"Instance\" blocks accept only "
 473                                 "one argument.");
 474                 return (EINVAL);
 475         }
 476
 477         for (i = 0; i < ci->children_num; i++)
 478         {
 479                 oconfig_item_t *child = ci->children + i;
 480
 481                 if (strcasecmp ("CollectCache", child->key) == 0)
 482                         cf_util_get_boolean (child, &conf->collect_cache);
 483                 else if (strcasecmp ("CollectConnections", child->key) == 0)
 484                         cf_util_get_boolean (child, &conf->collect_connections);
 485                 else if (strcasecmp ("CollectESI", child->key) == 0)
 486                         cf_util_get_boolean (child, &conf->collect_esi);
 487                 else if (strcasecmp ("CollectBackend", child->key) == 0)
 488                         cf_util_get_boolean (child, &conf->collect_backend);
 489                 else if (strcasecmp ("CollectFetch", child->key) == 0)
 490                         cf_util_get_boolean (child, &conf->collect_fetch);
 491                 else if (strcasecmp ("CollectHCB", child->key) == 0)
 492                         cf_util_get_boolean (child, &conf->collect_hcb);
 493                 else if (strcasecmp ("CollectSHM", child->key) == 0)
 494                         cf_util_get_boolean (child, &conf->collect_shm);
 495                 else if (strcasecmp ("CollectSMA", child->key) == 0)
 496                         cf_util_get_boolean (child, &conf->collect_sma);
 497                 else if (strcasecmp ("CollectSMS", child->key) == 0)
 498                         cf_util_get_boolean (child, &conf->collect_sms);
 499                 else if (strcasecmp ("CollectSM", child->key) == 0)
 500                         cf_util_get_boolean (child, &conf->collect_sm);
 501                 else if (strcasecmp ("CollectTotals", child->key) == 0)
 502                         cf_util_get_boolean (child, &conf->collect_totals);
 503                 else if (strcasecmp ("CollectWorkers", child->key) == 0)
 504                         cf_util_get_boolean (child, &conf->collect_workers);
 505                 else
 506                 {
 507                         WARNING ("Varnish plugin: Ignoring unknown "
 508                                         "configuration option: \"%s\"",
 509                                         child->key);
 510                 }
 511         }
 512
 513         if (!conf->collect_cache
 514                         && !conf->collect_connections
 515                         && !conf->collect_esi
 516                         && !conf->collect_backend
 517                         && !conf->collect_fetch
 518                         && !conf->collect_hcb
 519                         && !conf->collect_shm
 520                         && !conf->collect_sma
 521                         && !conf->collect_sms
 522                         && !conf->collect_sm
 523                         && !conf->collect_totals
 524                         && !conf->collect_workers)
 525         {
 526                 WARNING ("Varnish plugin: No metric has been configured for "
 527                                 "instance \"%s\". Disabling this instance.",
 528                                 (conf->instance == NULL) ? "localhost" : conf->instance);
 529                 return (EINVAL);
 530         }
 531
 532         ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
 533                         (conf->instance == NULL) ? "localhost" : conf->instance);
 534
 535         ud.data = conf;
 536         ud.free_func = varnish_config_free;
 537
 538         plugin_register_complex_read (/* group = */ "varnish",
 539                         /* name      = */ callback_name,
 540                         /* callback  = */ varnish_read,
 541                         /* interval  = */ NULL,
 542                         /* user data = */ &ud);
 543
 544         have_instance = 1;
 545
 546         return (0);
 547 } /* }}} int varnish_config_instance */
 548
 549 static int varnish_config (oconfig_item_t *ci) /* {{{ */
 550 {
 551         int i;
 552
 553         for (i = 0; i < ci->children_num; i++)
 554         {
 555                 oconfig_item_t *child = ci->children + i;
 556
 557                 if (strcasecmp ("Instance", child->key) == 0)
 558                         varnish_config_instance (child);
 559                 else
 560                 {
 561                         WARNING ("Varnish plugin: Ignoring unknown "
 562                                         "configuration option: \"%s\"",
 563                                         child->key);
 564                 }
 565         }
 566
 567         return (0);
 568 } /* }}} int varnish_config */
 569
 570 void module_register (void) /* {{{ */
 571 {
 572         plugin_register_complex_config("varnish", varnish_config);
 573         plugin_register_init ("varnish", varnish_init);
 574 } /* }}} */
 575
 576 /* vim: set sw=8 noet fdm=marker : */