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         sstrncpy (vl.plugin_instance, plugin_instance,
 171                                 sizeof (vl.plugin_instance));
 172         strncat(vl.plugin_instance, "-", 1);
 173         strncat(vl.plugin_instance, category, sizeof(category));
 174
 175         sstrncpy(vl.type, type, sizeof(vl.type));
 176
 177         if (type_instance != NULL)
 178                 sstrncpy(vl.type_instance, type_instance,
 179                                 sizeof(vl.type_instance));
 180
 181         return (plugin_dispatch_values(&vl));
 182 } /* }}} int varnish_submit */
 183
 184 static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
 185                 const char *category, const char *type, const char *type_instance,
 186                 uint64_t gauge_value)
 187 {
 188         value_t value;
 189
 190         value.gauge = (gauge_t) gauge_value;
 191
 192         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 193 } /* }}} int varnish_submit_gauge */
 194
 195 static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
 196                 const char *category, const char *type, const char *type_instance,
 197                 uint64_t derive_value)
 198 {
 199         value_t value;
 200
 201         value.derive = (derive_t) derive_value;
 202
 203         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 204 } /* }}} int varnish_submit_derive */
 205
 206 static void varnish_monitor(const user_config_t *conf, struct varnish_stats *VSL_stats) /* {{{ */
 207 {
 208         if(conf->collect_cache)
 209         {
 210                 /* Cache hits */
 211                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hit",     VSL_stats->cache_hit);
 212                 /* Cache misses */
 213                 varnish_submit_derive (conf->instance, "cache", "cache_result", "miss",    VSL_stats->cache_miss);
 214                 /* Cache hits for pass */
 215                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hitpass", VSL_stats->cache_hitpass);
 216         }
 217
 218         if(conf->collect_connections)
 219         {
 220                 /* Client connections accepted */
 221                 varnish_submit_derive (conf->instance, "client", "connections", "accepted", VSL_stats->client_conn);
 222                 /* Connection dropped, no sess */
 223                 varnish_submit_derive (conf->instance, "client", "connections", "dropped" , VSL_stats->client_drop);
 224                 /* Client requests received    */
 225                 varnish_submit_derive (conf->instance, "client", "connections", "received", VSL_stats->client_req);
 226         }
 227
 228         if(conf->collect_esi)
 229         {
 230                 /* Objects ESI parsed (unlock) */
 231                 varnish_submit_derive (conf->instance, "esi", "total_operations", "parsed", VSL_stats->esi_parse);
 232                 /* ESI parse errors (unlock)   */
 233                 varnish_submit_derive (conf->instance, "esi", "total_operations", "error",  VSL_stats->esi_errors);
 234         }
 235
 236         if(conf->collect_backend)
 237         {
 238                 /* Backend conn. success       */
 239                 varnish_submit_derive (conf->instance, "backend", "connections", "success"      , VSL_stats->backend_conn);
 240                 /* Backend conn. not attempted */
 241                 varnish_submit_derive (conf->instance, "backend", "connections", "not-attempted", VSL_stats->backend_unhealthy);
 242                 /* Backend conn. too many      */
 243                 varnish_submit_derive (conf->instance, "backend", "connections", "too-many"     , VSL_stats->backend_busy);
 244                 /* Backend conn. failures      */
 245                 varnish_submit_derive (conf->instance, "backend", "connections", "failures"     , VSL_stats->backend_fail);
 246                 /* Backend conn. reuses        */
 247                 varnish_submit_derive (conf->instance, "backend", "connections", "reuses"       , VSL_stats->backend_reuse);
 248                 /* Backend conn. was closed    */
 249                 varnish_submit_derive (conf->instance, "backend", "connections", "was-closed"   , VSL_stats->backend_toolate);
 250                 /* Backend conn. recycles      */
 251                 varnish_submit_derive (conf->instance, "backend", "connections", "recycled"     , VSL_stats->backend_recycle);
 252                 /* Backend conn. unused        */
 253                 varnish_submit_derive (conf->instance, "backend", "connections", "unused"       , VSL_stats->backend_unused);
 254         }
 255
 256         if(conf->collect_fetch)
 257         {
 258                 /* Fetch head                */
 259                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "head"       , VSL_stats->fetch_head);
 260                 /* Fetch with length         */
 261                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "length"     , VSL_stats->fetch_length);
 262                 /* Fetch chunked             */
 263                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "chunked"    , VSL_stats->fetch_chunked);
 264                 /* Fetch EOF                 */
 265                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "eof"        , VSL_stats->fetch_eof);
 266                 /* Fetch bad headers         */
 267                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "bad_headers", VSL_stats->fetch_bad);
 268                 /* Fetch wanted close        */
 269                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "close"      , VSL_stats->fetch_close);
 270                 /* Fetch pre HTTP/1.1 closed */
 271                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "oldhttp"    , VSL_stats->fetch_oldhttp);
 272                 /* Fetch zero len            */
 273                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "zero"       , VSL_stats->fetch_zero);
 274                 /* Fetch failed              */
 275                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "failed"     , VSL_stats->fetch_failed);
 276         }
 277
 278         if(conf->collect_hcb)
 279         {
 280                 /* HCB Lookups without lock */
 281                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_nolock", VSL_stats->hcb_nolock);
 282                 /* HCB Lookups with lock    */
 283                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_lock",   VSL_stats->hcb_lock);
 284                 /* HCB Inserts              */
 285                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "insert",        VSL_stats->hcb_insert);
 286         }
 287
 288         if(conf->collect_shm)
 289         {
 290                 /* SHM records                 */
 291                 varnish_submit_derive (conf->instance, "shm", "total_operations", "records"   , VSL_stats->shm_records);
 292                 /* SHM writes                  */
 293                 varnish_submit_derive (conf->instance, "shm", "total_operations", "writes"    , VSL_stats->shm_writes);
 294                 /* SHM flushes due to overflow */
 295                 varnish_submit_derive (conf->instance, "shm", "total_operations", "flushes"   , VSL_stats->shm_flushes);
 296                 /* SHM MTX contention          */
 297                 varnish_submit_derive (conf->instance, "shm", "total_operations", "contention", VSL_stats->shm_cont);
 298                 /* SHM cycles through buffer   */
 299                 varnish_submit_derive (conf->instance, "shm", "total_operations", "cycles"    , VSL_stats->shm_cycles);
 300         }
 301
 302         if(conf->collect_sm)
 303         {
 304                 /* allocator requests */
 305                 varnish_submit_derive (conf->instance, "sm", "total_requests", "nreq",  VSL_stats->sm_nreq);
 306                 /* outstanding allocations */
 307                 varnish_submit_gauge (conf->instance,  "sm", "requests", "outstanding", VSL_stats->sm_nobj);
 308                 /* bytes allocated */
 309                 varnish_submit_gauge (conf->instance,  "sm", "bytes", "allocated",      VSL_stats->sm_balloc);
 310                 /* bytes free */
 311                 varnish_submit_gauge (conf->instance,  "sm", "bytes", "free",           VSL_stats->sm_bfree);
 312         }
 313
 314         if(conf->collect_sma)
 315         {
 316                 /* SMA allocator requests */
 317                 varnish_submit_derive (conf->instance, "sma", "total_requests", "nreq",  VSL_stats->sma_nreq);
 318                 /* SMA outstanding allocations */
 319                 varnish_submit_gauge (conf->instance,  "sma", "requests", "outstanding", VSL_stats->sma_nobj);
 320                 /* SMA outstanding bytes */
 321                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "outstanding",    VSL_stats->sma_nbytes);
 322                 /* SMA bytes allocated */
 323                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "allocated",      VSL_stats->sma_balloc);
 324                 /* SMA bytes free */
 325                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "free" ,          VSL_stats->sma_bfree);
 326         }
 327
 328         if(conf->collect_sms)
 329         {
 330                 /* SMS allocator requests */
 331                 varnish_submit_derive (conf->instance, "sms", "total_requests", "allocator", VSL_stats->sms_nreq);
 332                 /* SMS outstanding allocations */
 333                 varnish_submit_gauge (conf->instance,  "sms", "requests", "outstanding",     VSL_stats->sms_nobj);
 334                 /* SMS outstanding bytes */
 335                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "outstanding",        VSL_stats->sms_nbytes);
 336                 /* SMS bytes allocated */
 337                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "allocated",          VSL_stats->sms_balloc);
 338                 /* SMS bytes freed */
 339                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "free",               VSL_stats->sms_bfree);
 340         }
 341
 342         if(conf->collect_totals)
 343         {
 344                 /* Total Sessions */
 345                 varnish_submit_derive (conf->instance, "s", "total_sessions", "sessions",  VSL_stats->s_sess);
 346                 /* Total Requests */
 347                 varnish_submit_derive (conf->instance, "s", "total_requests", "requests",  VSL_stats->s_req);
 348                 /* Total pipe */
 349                 varnish_submit_derive (conf->instance, "s", "total_operations", "pipe",    VSL_stats->s_pipe);
 350                 /* Total pass */
 351                 varnish_submit_derive (conf->instance, "s", "total_operations", "pass",    VSL_stats->s_pass);
 352                 /* Total fetch */
 353                 varnish_submit_derive (conf->instance, "s", "total_operations", "fetches", VSL_stats->s_fetch);
 354                 /* Total header bytes */
 355                 varnish_submit_derive (conf->instance, "s", "total_bytes", "header-bytes", VSL_stats->s_hdrbytes);
 356                 /* Total body byte */
 357                 varnish_submit_derive (conf->instance, "s", "total_bytes", "body-bytes",   VSL_stats->s_bodybytes);
 358         }
 359
 360         if(conf->collect_workers)
 361         {
 362                 /* worker threads */
 363                 varnish_submit_gauge (conf->instance, "n_wrk", "threads", "worker",            VSL_stats->n_wrk);
 364                 /* worker threads created */
 365                 varnish_submit_gauge (conf->instance, "n_wrk", "total_threads", "created",     VSL_stats->n_wrk_create);
 366                 /* worker threads not created */
 367                 varnish_submit_gauge (conf->instance, "n_wrk", "total_threads", "failed",      VSL_stats->n_wrk_failed);
 368                 /* worker threads limited */
 369                 varnish_submit_gauge (conf->instance, "n_wrk", "total_threads", "limited",     VSL_stats->n_wrk_max);
 370                 /* queued work requests */
 371                 varnish_submit_gauge (conf->instance, "n_wrk", "total_requests", "queued",     VSL_stats->n_wrk_queue);
 372                 /* overflowed work requests */
 373                 varnish_submit_gauge (conf->instance, "n_wrk", "total_requests", "overflowed", VSL_stats->n_wrk_overflow);
 374                 /* dropped work requests */
 375                 varnish_submit_gauge (conf->instance, "n_wrk", "total_requests", "dropped",    VSL_stats->n_wrk_drop);
 376         }
 377 } /* }}} void varnish_monitor */
 378
 379 static int varnish_read(user_data_t *ud) /* {{{ */
 380 {
 381         struct varnish_stats *VSL_stats;
 382         user_config_t *conf;
 383
 384         if ((ud == NULL) || (ud->data == NULL))
 385                 return (EINVAL);
 386
 387         conf = ud->data;
 388
 389         VSL_stats = VSL_OpenStats(conf->instance);
 390         if (VSL_stats == NULL)
 391         {
 392                 ERROR("Varnish plugin : unable to load statistics");
 393
 394                 return (-1);
 395         }
 396
 397         varnish_monitor(conf, VSL_stats);
 398
 399     return (0);
 400 } /* }}} */
 401
 402 static void varnish_config_free (void *ptr) /* {{{ */
 403 {
 404         user_config_t *conf = ptr;
 405
 406         if (conf == NULL)
 407                 return;
 408
 409         sfree (conf->instance);
 410         sfree (conf);
 411 } /* }}} */
 412
 413 static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
 414 {
 415         if (conf == NULL)
 416                 return (EINVAL);
 417
 418         conf->collect_backend     = 1;
 419         conf->collect_cache       = 1;
 420         conf->collect_connections = 1;
 421         conf->collect_esi         = 0;
 422         conf->collect_fetch       = 0;
 423         conf->collect_hcb         = 0;
 424         conf->collect_shm         = 1;
 425         conf->collect_sm          = 0;
 426         conf->collect_sma         = 0;
 427         conf->collect_sms         = 0;
 428         conf->collect_totals      = 0;
 429
 430         return (0);
 431 } /* }}} int varnish_config_apply_default */
 432
 433 static int varnish_init (void) /* {{{ */
 434 {
 435         user_config_t *conf;
 436         user_data_t ud;
 437
 438         if (have_instance)
 439                 return (0);
 440
 441         conf = malloc (sizeof (*conf));
 442         if (conf == NULL)
 443                 return (ENOMEM);
 444         memset (conf, 0, sizeof (*conf));
 445
 446         /* Default settings: */
 447         conf->instance = NULL;
 448
 449         varnish_config_apply_default (conf);
 450
 451         ud.data = conf;
 452         ud.free_func = varnish_config_free;
 453
 454         plugin_register_complex_read (/* group = */ "varnish",
 455                         /* name      = */ "varnish/localhost",
 456                         /* callback  = */ varnish_read,
 457                         /* interval  = */ NULL,
 458                         /* user data = */ &ud);
 459
 460         return (0);
 461 } /* }}} int varnish_init */
 462
 463 static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
 464 {
 465         user_config_t *conf;
 466         user_data_t ud;
 467         char callback_name[DATA_MAX_NAME_LEN];
 468         int i;
 469
 470         conf = malloc (sizeof (*conf));
 471         if (conf == NULL)
 472                 return (ENOMEM);
 473         memset (conf, 0, sizeof (*conf));
 474         conf->instance = NULL;
 475
 476         varnish_config_apply_default (conf);
 477
 478         if (ci->values_num == 1)
 479         {
 480                 int status;
 481
 482                 status = cf_util_get_string (ci, &conf->instance);
 483                 if (status != 0)
 484                 {
 485                         sfree (conf);
 486                         return (status);
 487                 }
 488                 assert (conf->instance != NULL);
 489
 490                 if (strcmp ("localhost", conf->instance) == 0)
 491                 {
 492                         sfree (conf->instance);
 493                         conf->instance = NULL;
 494                 }
 495         }
 496         else if (ci->values_num > 1)
 497         {
 498                 WARNING ("Varnish plugin: \"Instance\" blocks accept only "
 499                                 "one argument.");
 500                 return (EINVAL);
 501         }
 502
 503         for (i = 0; i < ci->children_num; i++)
 504         {
 505                 oconfig_item_t *child = ci->children + i;
 506
 507                 if (strcasecmp ("CollectCache", child->key) == 0)
 508                         cf_util_get_boolean (child, &conf->collect_cache);
 509                 else if (strcasecmp ("CollectConnections", child->key) == 0)
 510                         cf_util_get_boolean (child, &conf->collect_connections);
 511                 else if (strcasecmp ("CollectESI", child->key) == 0)
 512                         cf_util_get_boolean (child, &conf->collect_esi);
 513                 else if (strcasecmp ("CollectBackend", child->key) == 0)
 514                         cf_util_get_boolean (child, &conf->collect_backend);
 515                 else if (strcasecmp ("CollectFetch", child->key) == 0)
 516                         cf_util_get_boolean (child, &conf->collect_fetch);
 517                 else if (strcasecmp ("CollectHCB", child->key) == 0)
 518                         cf_util_get_boolean (child, &conf->collect_hcb);
 519                 else if (strcasecmp ("CollectSHM", child->key) == 0)
 520                         cf_util_get_boolean (child, &conf->collect_shm);
 521                 else if (strcasecmp ("CollectSMA", child->key) == 0)
 522                         cf_util_get_boolean (child, &conf->collect_sma);
 523                 else if (strcasecmp ("CollectSMS", child->key) == 0)
 524                         cf_util_get_boolean (child, &conf->collect_sms);
 525                 else if (strcasecmp ("CollectSM", child->key) == 0)
 526                         cf_util_get_boolean (child, &conf->collect_sm);
 527                 else if (strcasecmp ("CollectTotals", child->key) == 0)
 528                         cf_util_get_boolean (child, &conf->collect_totals);
 529                 else if (strcasecmp ("CollectWorkers", child->key) == 0)
 530                         cf_util_get_boolean (child, &conf->collect_workers);
 531                 else
 532                 {
 533                         WARNING ("Varnish plugin: Ignoring unknown "
 534                                         "configuration option: \"%s\"",
 535                                         child->key);
 536                 }
 537         }
 538
 539         if (!conf->collect_cache
 540                         && !conf->collect_connections
 541                         && !conf->collect_esi
 542                         && !conf->collect_backend
 543                         && !conf->collect_fetch
 544                         && !conf->collect_hcb
 545                         && !conf->collect_shm
 546                         && !conf->collect_sma
 547                         && !conf->collect_sms
 548                         && !conf->collect_sm
 549                         && !conf->collect_totals
 550                         && !conf->collect_workers)
 551         {
 552                 WARNING ("Varnish plugin: No metric has been configured for "
 553                                 "instance \"%s\". Disabling this instance.",
 554                                 (conf->instance == NULL) ? "localhost" : conf->instance);
 555                 return (EINVAL);
 556         }
 557
 558         ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
 559                         (conf->instance == NULL) ? "localhost" : conf->instance);
 560
 561         ud.data = conf;
 562         ud.free_func = varnish_config_free;
 563
 564         plugin_register_complex_read (/* group = */ "varnish",
 565                         /* name      = */ callback_name,
 566                         /* callback  = */ varnish_read,
 567                         /* interval  = */ NULL,
 568                         /* user data = */ &ud);
 569
 570         have_instance = 1;
 571
 572         return (0);
 573 } /* }}} int varnish_config_instance */
 574
 575 static int varnish_config (oconfig_item_t *ci) /* {{{ */
 576 {
 577         int i;
 578
 579         for (i = 0; i < ci->children_num; i++)
 580         {
 581                 oconfig_item_t *child = ci->children + i;
 582
 583                 if (strcasecmp ("Instance", child->key) == 0)
 584                         varnish_config_instance (child);
 585                 else
 586                 {
 587                         WARNING ("Varnish plugin: Ignoring unknown "
 588                                         "configuration option: \"%s\"",
 589                                         child->key);
 590                 }
 591         }
 592
 593         return (0);
 594 } /* }}} int varnish_config */
 595
 596 void module_register (void) /* {{{ */
 597 {
 598         plugin_register_complex_config("varnish", varnish_config);
 599         plugin_register_init ("varnish", varnish_init);
 600 } /* }}} */
 601
 602 /* vim: set sw=8 noet fdm=marker : */