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 *category, 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
 167         if (plugin_instance == NULL)
 168                 plugin_instance = "default";
 169
 170         ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
 171                 "%s-%s", plugin_instance, category);
 172
 173         sstrncpy (vl.type, type, sizeof (vl.type));
 174
 175         if (type_instance != NULL)
 176                 sstrncpy (vl.type_instance, type_instance,
 177                                 sizeof (vl.type_instance));
 178
 179         return (plugin_dispatch_values (&vl));
 180 } /* }}} int varnish_submit */
 181
 182 static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
 183                 const char *category, const char *type, const char *type_instance,
 184                 uint64_t gauge_value)
 185 {
 186         value_t value;
 187
 188         value.gauge = (gauge_t) gauge_value;
 189
 190         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 191 } /* }}} int varnish_submit_gauge */
 192
 193 static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
 194                 const char *category, const char *type, const char *type_instance,
 195                 uint64_t derive_value)
 196 {
 197         value_t value;
 198
 199         value.derive = (derive_t) derive_value;
 200
 201         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 202 } /* }}} int varnish_submit_derive */
 203
 204 static void varnish_monitor (const user_config_t *conf, struct varnish_stats *VSL_stats) /* {{{ */
 205 {
 206         if (conf->collect_cache)
 207         {
 208                 /* Cache hits */
 209                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hit",     VSL_stats->cache_hit);
 210                 /* Cache misses */
 211                 varnish_submit_derive (conf->instance, "cache", "cache_result", "miss",    VSL_stats->cache_miss);
 212                 /* Cache hits for pass */
 213                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hitpass", VSL_stats->cache_hitpass);
 214         }
 215
 216         if (conf->collect_connections)
 217         {
 218                 /* Client connections accepted */
 219                 varnish_submit_derive (conf->instance, "connections", "connections", "accepted", VSL_stats->client_conn);
 220                 /* Connection dropped, no sess */
 221                 varnish_submit_derive (conf->instance, "connections", "connections", "dropped" , VSL_stats->client_drop);
 222                 /* Client requests received    */
 223                 varnish_submit_derive (conf->instance, "connections", "connections", "received", VSL_stats->client_req);
 224         }
 225
 226         if (conf->collect_esi)
 227         {
 228                 /* Objects ESI parsed (unlock) */
 229                 varnish_submit_derive (conf->instance, "esi", "total_operations", "parsed", VSL_stats->esi_parse);
 230                 /* ESI parse errors (unlock)   */
 231                 varnish_submit_derive (conf->instance, "esi", "total_operations", "error",  VSL_stats->esi_errors);
 232         }
 233
 234         if (conf->collect_backend)
 235         {
 236                 /* Backend conn. success       */
 237                 varnish_submit_derive (conf->instance, "backend", "connections", "success"      , VSL_stats->backend_conn);
 238                 /* Backend conn. not attempted */
 239                 varnish_submit_derive (conf->instance, "backend", "connections", "not-attempted", VSL_stats->backend_unhealthy);
 240                 /* Backend conn. too many      */
 241                 varnish_submit_derive (conf->instance, "backend", "connections", "too-many"     , VSL_stats->backend_busy);
 242                 /* Backend conn. failures      */
 243                 varnish_submit_derive (conf->instance, "backend", "connections", "failures"     , VSL_stats->backend_fail);
 244                 /* Backend conn. reuses        */
 245                 varnish_submit_derive (conf->instance, "backend", "connections", "reuses"       , VSL_stats->backend_reuse);
 246                 /* Backend conn. was closed    */
 247                 varnish_submit_derive (conf->instance, "backend", "connections", "was-closed"   , VSL_stats->backend_toolate);
 248                 /* Backend conn. recycles      */
 249                 varnish_submit_derive (conf->instance, "backend", "connections", "recycled"     , VSL_stats->backend_recycle);
 250                 /* Backend conn. unused        */
 251                 varnish_submit_derive (conf->instance, "backend", "connections", "unused"       , VSL_stats->backend_unused);
 252         }
 253
 254         if (conf->collect_fetch)
 255         {
 256                 /* Fetch head                */
 257                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "head"       , VSL_stats->fetch_head);
 258                 /* Fetch with length         */
 259                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "length"     , VSL_stats->fetch_length);
 260                 /* Fetch chunked             */
 261                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "chunked"    , VSL_stats->fetch_chunked);
 262                 /* Fetch EOF                 */
 263                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "eof"        , VSL_stats->fetch_eof);
 264                 /* Fetch bad headers         */
 265                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "bad_headers", VSL_stats->fetch_bad);
 266                 /* Fetch wanted close        */
 267                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "close"      , VSL_stats->fetch_close);
 268                 /* Fetch pre HTTP/1.1 closed */
 269                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "oldhttp"    , VSL_stats->fetch_oldhttp);
 270                 /* Fetch zero len            */
 271                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "zero"       , VSL_stats->fetch_zero);
 272                 /* Fetch failed              */
 273                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "failed"     , VSL_stats->fetch_failed);
 274         }
 275
 276         if (conf->collect_hcb)
 277         {
 278                 /* HCB Lookups without lock */
 279                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_nolock", VSL_stats->hcb_nolock);
 280                 /* HCB Lookups with lock    */
 281                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_lock",   VSL_stats->hcb_lock);
 282                 /* HCB Inserts              */
 283                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "insert",        VSL_stats->hcb_insert);
 284         }
 285
 286         if (conf->collect_shm)
 287         {
 288                 /* SHM records                 */
 289                 varnish_submit_derive (conf->instance, "shm", "total_operations", "records"   , VSL_stats->shm_records);
 290                 /* SHM writes                  */
 291                 varnish_submit_derive (conf->instance, "shm", "total_operations", "writes"    , VSL_stats->shm_writes);
 292                 /* SHM flushes due to overflow */
 293                 varnish_submit_derive (conf->instance, "shm", "total_operations", "flushes"   , VSL_stats->shm_flushes);
 294                 /* SHM MTX contention          */
 295                 varnish_submit_derive (conf->instance, "shm", "total_operations", "contention", VSL_stats->shm_cont);
 296                 /* SHM cycles through buffer   */
 297                 varnish_submit_derive (conf->instance, "shm", "total_operations", "cycles"    , VSL_stats->shm_cycles);
 298         }
 299
 300         if (conf->collect_sm)
 301         {
 302                 /* allocator requests */
 303                 varnish_submit_derive (conf->instance, "sm", "total_requests", "nreq",  VSL_stats->sm_nreq);
 304                 /* outstanding allocations */
 305                 varnish_submit_gauge (conf->instance,  "sm", "requests", "outstanding", VSL_stats->sm_nobj);
 306                 /* bytes allocated */
 307                 varnish_submit_gauge (conf->instance,  "sm", "bytes", "allocated",      VSL_stats->sm_balloc);
 308                 /* bytes free */
 309                 varnish_submit_gauge (conf->instance,  "sm", "bytes", "free",           VSL_stats->sm_bfree);
 310         }
 311
 312         if (conf->collect_sma)
 313         {
 314                 /* SMA allocator requests */
 315                 varnish_submit_derive (conf->instance, "sma", "total_requests", "nreq",  VSL_stats->sma_nreq);
 316                 /* SMA outstanding allocations */
 317                 varnish_submit_gauge (conf->instance,  "sma", "requests", "outstanding", VSL_stats->sma_nobj);
 318                 /* SMA outstanding bytes */
 319                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "outstanding",    VSL_stats->sma_nbytes);
 320                 /* SMA bytes allocated */
 321                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "allocated",      VSL_stats->sma_balloc);
 322                 /* SMA bytes free */
 323                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "free" ,          VSL_stats->sma_bfree);
 324         }
 325
 326         if (conf->collect_sms)
 327         {
 328                 /* SMS allocator requests */
 329                 varnish_submit_derive (conf->instance, "sms", "total_requests", "allocator", VSL_stats->sms_nreq);
 330                 /* SMS outstanding allocations */
 331                 varnish_submit_gauge (conf->instance,  "sms", "requests", "outstanding",     VSL_stats->sms_nobj);
 332                 /* SMS outstanding bytes */
 333                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "outstanding",        VSL_stats->sms_nbytes);
 334                 /* SMS bytes allocated */
 335                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "allocated",          VSL_stats->sms_balloc);
 336                 /* SMS bytes freed */
 337                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "free",               VSL_stats->sms_bfree);
 338         }
 339
 340         if (conf->collect_totals)
 341         {
 342                 /* Total Sessions */
 343                 varnish_submit_derive (conf->instance, "totals", "total_sessions", "sessions",  VSL_stats->s_sess);
 344                 /* Total Requests */
 345                 varnish_submit_derive (conf->instance, "totals", "total_requests", "requests",  VSL_stats->s_req);
 346                 /* Total pipe */
 347                 varnish_submit_derive (conf->instance, "totals", "total_operations", "pipe",    VSL_stats->s_pipe);
 348                 /* Total pass */
 349                 varnish_submit_derive (conf->instance, "totals", "total_operations", "pass",    VSL_stats->s_pass);
 350                 /* Total fetch */
 351                 varnish_submit_derive (conf->instance, "totals", "total_operations", "fetches", VSL_stats->s_fetch);
 352                 /* Total header bytes */
 353                 varnish_submit_derive (conf->instance, "totals", "total_bytes", "header-bytes", VSL_stats->s_hdrbytes);
 354                 /* Total body byte */
 355                 varnish_submit_derive (conf->instance, "totals", "total_bytes", "body-bytes",   VSL_stats->s_bodybytes);
 356         }
 357
 358         if (conf->collect_workers)
 359         {
 360                 /* worker threads */
 361                 varnish_submit_gauge (conf->instance, "workers", "threads", "worker",            VSL_stats->n_wrk);
 362                 /* worker threads created */
 363                 varnish_submit_gauge (conf->instance, "workers", "total_threads", "created",     VSL_stats->n_wrk_create);
 364                 /* worker threads not created */
 365                 varnish_submit_gauge (conf->instance, "workers", "total_threads", "failed",      VSL_stats->n_wrk_failed);
 366                 /* worker threads limited */
 367                 varnish_submit_gauge (conf->instance, "workers", "total_threads", "limited",     VSL_stats->n_wrk_max);
 368                 /* queued work requests */
 369                 varnish_submit_gauge (conf->instance, "workers", "total_requests", "queued",     VSL_stats->n_wrk_queue);
 370                 /* overflowed work requests */
 371                 varnish_submit_gauge (conf->instance, "workers", "total_requests", "overflowed", VSL_stats->n_wrk_overflow);
 372                 /* dropped work requests */
 373                 varnish_submit_gauge (conf->instance, "workers", "total_requests", "dropped",    VSL_stats->n_wrk_drop);
 374         }
 375 } /* }}} void varnish_monitor */
 376
 377 static int varnish_read (user_data_t *ud) /* {{{ */
 378 {
 379         struct varnish_stats *VSL_stats;
 380         user_config_t *conf;
 381
 382         if ((ud == NULL) || (ud->data == NULL))
 383                 return (EINVAL);
 384
 385         conf = ud->data;
 386
 387         VSL_stats = VSL_OpenStats (conf->instance);
 388         if (VSL_stats == NULL)
 389         {
 390                 ERROR ("Varnish plugin : unable to load statistics");
 391
 392                 return (-1);
 393         }
 394
 395         varnish_monitor (conf, VSL_stats);
 396
 397     return (0);
 398 } /* }}} */
 399
 400 static void varnish_config_free (void *ptr) /* {{{ */
 401 {
 402         user_config_t *conf = ptr;
 403
 404         if (conf == NULL)
 405                 return;
 406
 407         sfree (conf->instance);
 408         sfree (conf);
 409 } /* }}} */
 410
 411 static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
 412 {
 413         if (conf == NULL)
 414                 return (EINVAL);
 415
 416         conf->collect_backend     = 1;
 417         conf->collect_cache       = 1;
 418         conf->collect_connections = 1;
 419         conf->collect_esi         = 0;
 420         conf->collect_fetch       = 0;
 421         conf->collect_hcb         = 0;
 422         conf->collect_shm         = 1;
 423         conf->collect_sm          = 0;
 424         conf->collect_sma         = 0;
 425         conf->collect_sms         = 0;
 426         conf->collect_totals      = 0;
 427
 428         return (0);
 429 } /* }}} int varnish_config_apply_default */
 430
 431 static int varnish_init (void) /* {{{ */
 432 {
 433         user_config_t *conf;
 434         user_data_t ud;
 435
 436         if (have_instance)
 437                 return (0);
 438
 439         conf = malloc (sizeof (*conf));
 440         if (conf == NULL)
 441                 return (ENOMEM);
 442         memset (conf, 0, sizeof (*conf));
 443
 444         /* Default settings: */
 445         conf->instance = NULL;
 446
 447         varnish_config_apply_default (conf);
 448
 449         ud.data = conf;
 450         ud.free_func = varnish_config_free;
 451
 452         plugin_register_complex_read (/* group = */ "varnish",
 453                         /* name      = */ "varnish/localhost",
 454                         /* callback  = */ varnish_read,
 455                         /* interval  = */ NULL,
 456                         /* user data = */ &ud);
 457
 458         return (0);
 459 } /* }}} int varnish_init */
 460
 461 static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
 462 {
 463         user_config_t *conf;
 464         user_data_t ud;
 465         char callback_name[DATA_MAX_NAME_LEN];
 466         int i;
 467
 468         conf = malloc (sizeof (*conf));
 469         if (conf == NULL)
 470                 return (ENOMEM);
 471         memset (conf, 0, sizeof (*conf));
 472         conf->instance = NULL;
 473
 474         varnish_config_apply_default (conf);
 475
 476         if (ci->values_num == 1)
 477         {
 478                 int status;
 479
 480                 status = cf_util_get_string (ci, &conf->instance);
 481                 if (status != 0)
 482                 {
 483                         sfree (conf);
 484                         return (status);
 485                 }
 486                 assert (conf->instance != NULL);
 487
 488                 if (strcmp ("localhost", conf->instance) == 0)
 489                 {
 490                         sfree (conf->instance);
 491                         conf->instance = NULL;
 492                 }
 493         }
 494         else if (ci->values_num > 1)
 495         {
 496                 WARNING ("Varnish plugin: \"Instance\" blocks accept only "
 497                                 "one argument.");
 498                 return (EINVAL);
 499         }
 500
 501         for (i = 0; i < ci->children_num; i++)
 502         {
 503                 oconfig_item_t *child = ci->children + i;
 504
 505                 if (strcasecmp ("CollectCache", child->key) == 0)
 506                         cf_util_get_boolean (child, &conf->collect_cache);
 507                 else if (strcasecmp ("CollectConnections", child->key) == 0)
 508                         cf_util_get_boolean (child, &conf->collect_connections);
 509                 else if (strcasecmp ("CollectESI", child->key) == 0)
 510                         cf_util_get_boolean (child, &conf->collect_esi);
 511                 else if (strcasecmp ("CollectBackend", child->key) == 0)
 512                         cf_util_get_boolean (child, &conf->collect_backend);
 513                 else if (strcasecmp ("CollectFetch", child->key) == 0)
 514                         cf_util_get_boolean (child, &conf->collect_fetch);
 515                 else if (strcasecmp ("CollectHCB", child->key) == 0)
 516                         cf_util_get_boolean (child, &conf->collect_hcb);
 517                 else if (strcasecmp ("CollectSHM", child->key) == 0)
 518                         cf_util_get_boolean (child, &conf->collect_shm);
 519                 else if (strcasecmp ("CollectSMA", child->key) == 0)
 520                         cf_util_get_boolean (child, &conf->collect_sma);
 521                 else if (strcasecmp ("CollectSMS", child->key) == 0)
 522                         cf_util_get_boolean (child, &conf->collect_sms);
 523                 else if (strcasecmp ("CollectSM", child->key) == 0)
 524                         cf_util_get_boolean (child, &conf->collect_sm);
 525                 else if (strcasecmp ("CollectTotals", child->key) == 0)
 526                         cf_util_get_boolean (child, &conf->collect_totals);
 527                 else if (strcasecmp ("CollectWorkers", child->key) == 0)
 528                         cf_util_get_boolean (child, &conf->collect_workers);
 529                 else
 530                 {
 531                         WARNING ("Varnish plugin: Ignoring unknown "
 532                                         "configuration option: \"%s\"",
 533                                         child->key);
 534                 }
 535         }
 536
 537         if (!conf->collect_cache
 538                         && !conf->collect_connections
 539                         && !conf->collect_esi
 540                         && !conf->collect_backend
 541                         && !conf->collect_fetch
 542                         && !conf->collect_hcb
 543                         && !conf->collect_shm
 544                         && !conf->collect_sma
 545                         && !conf->collect_sms
 546                         && !conf->collect_sm
 547                         && !conf->collect_totals
 548                         && !conf->collect_workers)
 549         {
 550                 WARNING ("Varnish plugin: No metric has been configured for "
 551                                 "instance \"%s\". Disabling this instance.",
 552                                 (conf->instance == NULL) ? "localhost" : conf->instance);
 553                 return (EINVAL);
 554         }
 555
 556         ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
 557                         (conf->instance == NULL) ? "localhost" : conf->instance);
 558
 559         ud.data = conf;
 560         ud.free_func = varnish_config_free;
 561
 562         plugin_register_complex_read (/* group = */ "varnish",
 563                         /* name      = */ callback_name,
 564                         /* callback  = */ varnish_read,
 565                         /* interval  = */ NULL,
 566                         /* user data = */ &ud);
 567
 568         have_instance = 1;
 569
 570         return (0);
 571 } /* }}} int varnish_config_instance */
 572
 573 static int varnish_config (oconfig_item_t *ci) /* {{{ */
 574 {
 575         int i;
 576
 577         for (i = 0; i < ci->children_num; i++)
 578         {
 579                 oconfig_item_t *child = ci->children + i;
 580
 581                 if (strcasecmp ("Instance", child->key) == 0)
 582                         varnish_config_instance (child);
 583                 else
 584                 {
 585                         WARNING ("Varnish plugin: Ignoring unknown "
 586                                         "configuration option: \"%s\"",
 587                                         child->key);
 588                 }
 589         }
 590
 591         return (0);
 592 } /* }}} int varnish_config */
 593
 594 void module_register (void) /* {{{ */
 595 {
 596         plugin_register_complex_config ("varnish", varnish_config);
 597         plugin_register_init ("varnish", varnish_init);
 598 } /* }}} */
 599
 600 /* vim: set sw=8 noet fdm=marker : */