src/varnish.c

   1 /**
   2  * collectd - src/varnish.c
   3  * Copyright (C) 2010 Jérôme Renard
   4  * Copyright (C) 2010 Marc Fournier
   5  * Copyright (C) 2010 Florian Forster
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; only version 2 of the License is applicable.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  *
  20  * Authors:
  21  *   Jérôme Renard <jerome.renard at gmail.com>
  22  *   Marc Fournier <marc.fournier at camptocamp.com>
  23  *   Florian octo Forster <octo at verplant.org>
  24  **/
  25
  26 /**
  27  * Current list of what is monitored and what is not monitored (yet)
  28  * {{{
  29  * Field name           Description                           Monitored
  30  * ----------           -----------                           ---------
  31  * uptime               Child uptime                              N
  32  * client_conn          Client connections accepted               Y
  33  * client_drop          Connection dropped, no sess               Y
  34  * client_req           Client requests received                  Y
  35  * cache_hit            Cache hits                                Y
  36  * cache_hitpass        Cache hits for pass                       Y
  37  * cache_miss           Cache misses                              Y
  38  * backend_conn         Backend conn. success                     Y
  39  * backend_unhealthy    Backend conn. not attempted               Y
  40  * backend_busy         Backend conn. too many                    Y
  41  * backend_fail         Backend conn. failures                    Y
  42  * backend_reuse        Backend conn. reuses                      Y
  43  * backend_toolate      Backend conn. was closed                  Y
  44  * backend_recycle      Backend conn. recycles                    Y
  45  * backend_unused       Backend conn. unused                      Y
  46  * fetch_head           Fetch head                                Y
  47  * fetch_length         Fetch with Length                         Y
  48  * fetch_chunked        Fetch chunked                             Y
  49  * fetch_eof            Fetch EOF                                 Y
  50  * fetch_bad            Fetch had bad headers                     Y
  51  * fetch_close          Fetch wanted close                        Y
  52  * fetch_oldhttp        Fetch pre HTTP/1.1 closed                 Y
  53  * fetch_zero           Fetch zero len                            Y
  54  * fetch_failed         Fetch failed                              Y
  55  * n_sess_mem           N struct sess_mem                         N
  56  * n_sess               N struct sess                             N
  57  * n_object             N struct object                           N
  58  * n_vampireobject      N unresurrected objects                   N
  59  * n_objectcore         N struct objectcore                       N
  60  * n_objecthead         N struct objecthead                       N
  61  * n_smf                N struct smf                              N
  62  * n_smf_frag           N small free smf                          N
  63  * n_smf_large          N large free smf                          N
  64  * n_vbe_conn           N struct vbe_conn                         N
  65  * n_wrk                N worker threads                          Y
  66  * n_wrk_create         N worker threads created                  Y
  67  * n_wrk_failed         N worker threads not created              Y
  68  * n_wrk_max            N worker threads limited                  Y
  69  * n_wrk_queue          N queued work requests                    Y
  70  * n_wrk_overflow       N overflowed work requests                Y
  71  * n_wrk_drop           N dropped work requests                   Y
  72  * n_backend            N backends                                N
  73  * n_expired            N expired objects                         N
  74  * n_lru_nuked          N LRU nuked objects                       N
  75  * n_lru_saved          N LRU saved objects                       N
  76  * n_lru_moved          N LRU moved objects                       N
  77  * n_deathrow           N objects on deathrow                     N
  78  * losthdr              HTTP header overflows                     N
  79  * n_objsendfile        Objects sent with sendfile                N
  80  * n_objwrite           Objects sent with write                   N
  81  * n_objoverflow        Objects overflowing workspace             N
  82  * s_sess               Total Sessions                            Y
  83  * s_req                Total Requests                            Y
  84  * s_pipe               Total pipe                                Y
  85  * s_pass               Total pass                                Y
  86  * s_fetch              Total fetch                               Y
  87  * s_hdrbytes           Total header bytes                        Y
  88  * s_bodybytes          Total body bytes                          Y
  89  * sess_closed          Session Closed                            N
  90  * sess_pipeline        Session Pipeline                          N
  91  * sess_readahead       Session Read Ahead                        N
  92  * sess_linger          Session Linger                            N
  93  * sess_herd            Session herd                              N
  94  * shm_records          SHM records                               Y
  95  * shm_writes           SHM writes                                Y
  96  * shm_flushes          SHM flushes due to overflow               Y
  97  * shm_cont             SHM MTX contention                        Y
  98  * shm_cycles           SHM cycles through buffer                 Y
  99  * sm_nreq              allocator requests                        Y
 100  * sm_nobj              outstanding allocations                   Y
 101  * sm_balloc            bytes allocated                           Y
 102  * sm_bfree             bytes free                                Y
 103  * sma_nreq             SMA allocator requests                    Y
 104  * sma_nobj             SMA outstanding allocations               Y
 105  * sma_nbytes           SMA outstanding bytes                     Y
 106  * sma_balloc           SMA bytes allocated                       Y
 107  * sma_bfree            SMA bytes free                            Y
 108  * sms_nreq             SMS allocator requests                    Y
 109  * sms_nobj             SMS outstanding allocations               Y
 110  * sms_nbytes           SMS outstanding bytes                     Y
 111  * sms_balloc           SMS bytes allocated                       Y
 112  * sms_bfree            SMS bytes freed                           Y
 113  * backend_req          Backend requests made                     N
 114  * n_vcl                N vcl total                               N
 115  * n_vcl_avail          N vcl available                           N
 116  * n_vcl_discard        N vcl discarded                           N
 117  * n_purge              N total active purges                     N
 118  * n_purge_add          N new purges added                        N
 119  * n_purge_retire       N old purges deleted                      N
 120  * n_purge_obj_test     N objects tested                          N
 121  * n_purge_re_test      N regexps tested against                  N
 122  * n_purge_dups         N duplicate purges removed                N
 123  * hcb_nolock           HCB Lookups without lock                  Y
 124  * hcb_lock             HCB Lookups with lock                     Y
 125  * hcb_insert           HCB Inserts                               Y
 126  * esi_parse            Objects ESI parsed (unlock)               Y
 127  * esi_errors           ESI parse errors (unlock)                 Y
 128  * }}}
 129  */
 130 #include "collectd.h"
 131 #include "common.h"
 132 #include "plugin.h"
 133 #include "configfile.h"
 134
 135 #include <varnish/varnishapi.h>
 136
 137 /* {{{ user_config_s */
 138 struct user_config_s {
 139         char *instance;
 140
 141         _Bool collect_cache;
 142         _Bool collect_connections;
 143         _Bool collect_esi;
 144         _Bool collect_backend;
 145         _Bool collect_fetch;
 146         _Bool collect_hcb;
 147         _Bool collect_shm;
 148         _Bool collect_sma;
 149         _Bool collect_sms;
 150         _Bool collect_sm;
 151         _Bool collect_totals;
 152         _Bool collect_workers;
 153 };
 154 typedef struct user_config_s user_config_t; /* }}} */
 155
 156 static _Bool have_instance = 0;
 157
 158 static int varnish_submit (const char *plugin_instance, /* {{{ */
 159                 const char *category, const char *type, const char *type_instance, value_t value)
 160 {
 161         value_list_t vl = VALUE_LIST_INIT;
 162
 163         vl.values = &value;
 164         vl.values_len = 1;
 165
 166         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 167
 168         sstrncpy (vl.plugin, "varnish", sizeof (vl.plugin));
 169
 170         if (plugin_instance == NULL)
 171                 plugin_instance = "default";
 172
 173         ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
 174                 "%s-%s", plugin_instance, category);
 175
 176         sstrncpy (vl.type, type, sizeof (vl.type));
 177
 178         if (type_instance != NULL)
 179                 sstrncpy (vl.type_instance, type_instance,
 180                                 sizeof (vl.type_instance));
 181
 182         return (plugin_dispatch_values (&vl));
 183 } /* }}} int varnish_submit */
 184
 185 static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
 186                 const char *category, const char *type, const char *type_instance,
 187                 uint64_t gauge_value)
 188 {
 189         value_t value;
 190
 191         value.gauge = (gauge_t) gauge_value;
 192
 193         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 194 } /* }}} int varnish_submit_gauge */
 195
 196 static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
 197                 const char *category, const char *type, const char *type_instance,
 198                 uint64_t derive_value)
 199 {
 200         value_t value;
 201
 202         value.derive = (derive_t) derive_value;
 203
 204         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 205 } /* }}} int varnish_submit_derive */
 206
 207 static void varnish_monitor (const user_config_t *conf, struct varnish_stats *VSL_stats) /* {{{ */
 208 {
 209         if (conf->collect_cache)
 210         {
 211                 /* Cache hits */
 212                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hit",     VSL_stats->cache_hit);
 213                 /* Cache misses */
 214                 varnish_submit_derive (conf->instance, "cache", "cache_result", "miss",    VSL_stats->cache_miss);
 215                 /* Cache hits for pass */
 216                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hitpass", VSL_stats->cache_hitpass);
 217         }
 218
 219         if (conf->collect_connections)
 220         {
 221                 /* Client connections accepted */
 222                 varnish_submit_derive (conf->instance, "connections", "connections", "accepted", VSL_stats->client_conn);
 223                 /* Connection dropped, no sess */
 224                 varnish_submit_derive (conf->instance, "connections", "connections", "dropped" , VSL_stats->client_drop);
 225                 /* Client requests received    */
 226                 varnish_submit_derive (conf->instance, "connections", "connections", "received", VSL_stats->client_req);
 227         }
 228
 229         if (conf->collect_esi)
 230         {
 231                 /* Objects ESI parsed (unlock) */
 232                 varnish_submit_derive (conf->instance, "esi", "total_operations", "parsed", VSL_stats->esi_parse);
 233                 /* ESI parse errors (unlock)   */
 234                 varnish_submit_derive (conf->instance, "esi", "total_operations", "error",  VSL_stats->esi_errors);
 235         }
 236
 237         if (conf->collect_backend)
 238         {
 239                 /* Backend conn. success       */
 240                 varnish_submit_derive (conf->instance, "backend", "connections", "success"      , VSL_stats->backend_conn);
 241                 /* Backend conn. not attempted */
 242                 varnish_submit_derive (conf->instance, "backend", "connections", "not-attempted", VSL_stats->backend_unhealthy);
 243                 /* Backend conn. too many      */
 244                 varnish_submit_derive (conf->instance, "backend", "connections", "too-many"     , VSL_stats->backend_busy);
 245                 /* Backend conn. failures      */
 246                 varnish_submit_derive (conf->instance, "backend", "connections", "failures"     , VSL_stats->backend_fail);
 247                 /* Backend conn. reuses        */
 248                 varnish_submit_derive (conf->instance, "backend", "connections", "reuses"       , VSL_stats->backend_reuse);
 249                 /* Backend conn. was closed    */
 250                 varnish_submit_derive (conf->instance, "backend", "connections", "was-closed"   , VSL_stats->backend_toolate);
 251                 /* Backend conn. recycles      */
 252                 varnish_submit_derive (conf->instance, "backend", "connections", "recycled"     , VSL_stats->backend_recycle);
 253                 /* Backend conn. unused        */
 254                 varnish_submit_derive (conf->instance, "backend", "connections", "unused"       , VSL_stats->backend_unused);
 255         }
 256
 257         if (conf->collect_fetch)
 258         {
 259                 /* Fetch head                */
 260                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "head"       , VSL_stats->fetch_head);
 261                 /* Fetch with length         */
 262                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "length"     , VSL_stats->fetch_length);
 263                 /* Fetch chunked             */
 264                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "chunked"    , VSL_stats->fetch_chunked);
 265                 /* Fetch EOF                 */
 266                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "eof"        , VSL_stats->fetch_eof);
 267                 /* Fetch bad headers         */
 268                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "bad_headers", VSL_stats->fetch_bad);
 269                 /* Fetch wanted close        */
 270                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "close"      , VSL_stats->fetch_close);
 271                 /* Fetch pre HTTP/1.1 closed */
 272                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "oldhttp"    , VSL_stats->fetch_oldhttp);
 273                 /* Fetch zero len            */
 274                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "zero"       , VSL_stats->fetch_zero);
 275                 /* Fetch failed              */
 276                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "failed"     , VSL_stats->fetch_failed);
 277         }
 278
 279         if (conf->collect_hcb)
 280         {
 281                 /* HCB Lookups without lock */
 282                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_nolock", VSL_stats->hcb_nolock);
 283                 /* HCB Lookups with lock    */
 284                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_lock",   VSL_stats->hcb_lock);
 285                 /* HCB Inserts              */
 286                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "insert",        VSL_stats->hcb_insert);
 287         }
 288
 289         if (conf->collect_shm)
 290         {
 291                 /* SHM records                 */
 292                 varnish_submit_derive (conf->instance, "shm", "total_operations", "records"   , VSL_stats->shm_records);
 293                 /* SHM writes                  */
 294                 varnish_submit_derive (conf->instance, "shm", "total_operations", "writes"    , VSL_stats->shm_writes);
 295                 /* SHM flushes due to overflow */
 296                 varnish_submit_derive (conf->instance, "shm", "total_operations", "flushes"   , VSL_stats->shm_flushes);
 297                 /* SHM MTX contention          */
 298                 varnish_submit_derive (conf->instance, "shm", "total_operations", "contention", VSL_stats->shm_cont);
 299                 /* SHM cycles through buffer   */
 300                 varnish_submit_derive (conf->instance, "shm", "total_operations", "cycles"    , VSL_stats->shm_cycles);
 301         }
 302
 303         if (conf->collect_sm)
 304         {
 305                 /* allocator requests */
 306                 varnish_submit_derive (conf->instance, "sm", "total_requests", "nreq",  VSL_stats->sm_nreq);
 307                 /* outstanding allocations */
 308                 varnish_submit_gauge (conf->instance,  "sm", "requests", "outstanding", VSL_stats->sm_nobj);
 309                 /* bytes allocated */
 310                 varnish_submit_derive (conf->instance,  "sm", "total_bytes", "allocated",      VSL_stats->sm_balloc);
 311                 /* bytes free */
 312                 varnish_submit_derive (conf->instance,  "sm", "total_bytes", "free",           VSL_stats->sm_bfree);
 313         }
 314
 315         if (conf->collect_sma)
 316         {
 317                 /* SMA allocator requests */
 318                 varnish_submit_derive (conf->instance, "sma", "total_requests", "nreq",  VSL_stats->sma_nreq);
 319                 /* SMA outstanding allocations */
 320                 varnish_submit_gauge (conf->instance,  "sma", "requests", "outstanding", VSL_stats->sma_nobj);
 321                 /* SMA outstanding bytes */
 322                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "outstanding",    VSL_stats->sma_nbytes);
 323                 /* SMA bytes allocated */
 324                 varnish_submit_derive (conf->instance,  "sma", "total_bytes", "allocated",      VSL_stats->sma_balloc);
 325                 /* SMA bytes free */
 326                 varnish_submit_derive (conf->instance,  "sma", "total_bytes", "free" ,          VSL_stats->sma_bfree);
 327         }
 328
 329         if (conf->collect_sms)
 330         {
 331                 /* SMS allocator requests */
 332                 varnish_submit_derive (conf->instance, "sms", "total_requests", "allocator", VSL_stats->sms_nreq);
 333                 /* SMS outstanding allocations */
 334                 varnish_submit_gauge (conf->instance,  "sms", "requests", "outstanding",     VSL_stats->sms_nobj);
 335                 /* SMS outstanding bytes */
 336                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "outstanding",        VSL_stats->sms_nbytes);
 337                 /* SMS bytes allocated */
 338                 varnish_submit_derive (conf->instance,  "sms", "total_bytes", "allocated",          VSL_stats->sms_balloc);
 339                 /* SMS bytes freed */
 340                 varnish_submit_derive (conf->instance,  "sms", "total_bytes", "free",               VSL_stats->sms_bfree);
 341         }
 342
 343         if (conf->collect_totals)
 344         {
 345                 /* Total Sessions */
 346                 varnish_submit_derive (conf->instance, "totals", "total_sessions", "sessions",  VSL_stats->s_sess);
 347                 /* Total Requests */
 348                 varnish_submit_derive (conf->instance, "totals", "total_requests", "requests",  VSL_stats->s_req);
 349                 /* Total pipe */
 350                 varnish_submit_derive (conf->instance, "totals", "total_operations", "pipe",    VSL_stats->s_pipe);
 351                 /* Total pass */
 352                 varnish_submit_derive (conf->instance, "totals", "total_operations", "pass",    VSL_stats->s_pass);
 353                 /* Total fetch */
 354                 varnish_submit_derive (conf->instance, "totals", "total_operations", "fetches", VSL_stats->s_fetch);
 355                 /* Total header bytes */
 356                 varnish_submit_derive (conf->instance, "totals", "total_bytes", "header-bytes", VSL_stats->s_hdrbytes);
 357                 /* Total body byte */
 358                 varnish_submit_derive (conf->instance, "totals", "total_bytes", "body-bytes",   VSL_stats->s_bodybytes);
 359         }
 360
 361         if (conf->collect_workers)
 362         {
 363                 /* worker threads */
 364                 varnish_submit_gauge (conf->instance, "workers", "threads", "worker",            VSL_stats->n_wrk);
 365                 /* worker threads created */
 366                 varnish_submit_derive (conf->instance, "workers", "total_threads", "created",     VSL_stats->n_wrk_create);
 367                 /* worker threads not created */
 368                 varnish_submit_derive (conf->instance, "workers", "total_threads", "failed",      VSL_stats->n_wrk_failed);
 369                 /* worker threads limited */
 370                 varnish_submit_derive (conf->instance, "workers", "total_threads", "limited",     VSL_stats->n_wrk_max);
 371                 /* queued work requests */
 372                 varnish_submit_derive (conf->instance, "workers", "total_requests", "queued",     VSL_stats->n_wrk_queue);
 373                 /* overflowed work requests */
 374                 varnish_submit_derive (conf->instance, "workers", "total_requests", "overflowed", VSL_stats->n_wrk_overflow);
 375                 /* dropped work requests */
 376                 varnish_submit_derive (conf->instance, "workers", "total_requests", "dropped",    VSL_stats->n_wrk_drop);
 377         }
 378 } /* }}} void varnish_monitor */
 379
 380 static int varnish_read (user_data_t *ud) /* {{{ */
 381 {
 382         struct varnish_stats *VSL_stats;
 383         user_config_t *conf;
 384
 385         if ((ud == NULL) || (ud->data == NULL))
 386                 return (EINVAL);
 387
 388         conf = ud->data;
 389
 390         VSL_stats = VSL_OpenStats (conf->instance);
 391         if (VSL_stats == NULL)
 392         {
 393                 ERROR ("Varnish plugin : unable to load statistics");
 394
 395                 return (-1);
 396         }
 397
 398         varnish_monitor (conf, VSL_stats);
 399
 400     return (0);
 401 } /* }}} */
 402
 403 static void varnish_config_free (void *ptr) /* {{{ */
 404 {
 405         user_config_t *conf = ptr;
 406
 407         if (conf == NULL)
 408                 return;
 409
 410         sfree (conf->instance);
 411         sfree (conf);
 412 } /* }}} */
 413
 414 static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
 415 {
 416         if (conf == NULL)
 417                 return (EINVAL);
 418
 419         conf->collect_backend     = 1;
 420         conf->collect_cache       = 1;
 421         conf->collect_connections = 1;
 422         conf->collect_esi         = 0;
 423         conf->collect_fetch       = 0;
 424         conf->collect_hcb         = 0;
 425         conf->collect_shm         = 1;
 426         conf->collect_sm          = 0;
 427         conf->collect_sma         = 0;
 428         conf->collect_sms         = 0;
 429         conf->collect_totals      = 0;
 430
 431         return (0);
 432 } /* }}} int varnish_config_apply_default */
 433
 434 static int varnish_init (void) /* {{{ */
 435 {
 436         user_config_t *conf;
 437         user_data_t ud;
 438
 439         if (have_instance)
 440                 return (0);
 441
 442         conf = malloc (sizeof (*conf));
 443         if (conf == NULL)
 444                 return (ENOMEM);
 445         memset (conf, 0, sizeof (*conf));
 446
 447         /* Default settings: */
 448         conf->instance = NULL;
 449
 450         varnish_config_apply_default (conf);
 451
 452         ud.data = conf;
 453         ud.free_func = varnish_config_free;
 454
 455         plugin_register_complex_read (/* group = */ "varnish",
 456                         /* name      = */ "varnish/localhost",
 457                         /* callback  = */ varnish_read,
 458                         /* interval  = */ NULL,
 459                         /* user data = */ &ud);
 460
 461         return (0);
 462 } /* }}} int varnish_init */
 463
 464 static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
 465 {
 466         user_config_t *conf;
 467         user_data_t ud;
 468         char callback_name[DATA_MAX_NAME_LEN];
 469         int i;
 470
 471         conf = malloc (sizeof (*conf));
 472         if (conf == NULL)
 473                 return (ENOMEM);
 474         memset (conf, 0, sizeof (*conf));
 475         conf->instance = NULL;
 476
 477         varnish_config_apply_default (conf);
 478
 479         if (ci->values_num == 1)
 480         {
 481                 int status;
 482
 483                 status = cf_util_get_string (ci, &conf->instance);
 484                 if (status != 0)
 485                 {
 486                         sfree (conf);
 487                         return (status);
 488                 }
 489                 assert (conf->instance != NULL);
 490
 491                 if (strcmp ("localhost", conf->instance) == 0)
 492                 {
 493                         sfree (conf->instance);
 494                         conf->instance = NULL;
 495                 }
 496         }
 497         else if (ci->values_num > 1)
 498         {
 499                 WARNING ("Varnish plugin: \"Instance\" blocks accept only "
 500                                 "one argument.");
 501                 return (EINVAL);
 502         }
 503
 504         for (i = 0; i < ci->children_num; i++)
 505         {
 506                 oconfig_item_t *child = ci->children + i;
 507
 508                 if (strcasecmp ("CollectCache", child->key) == 0)
 509                         cf_util_get_boolean (child, &conf->collect_cache);
 510                 else if (strcasecmp ("CollectConnections", child->key) == 0)
 511                         cf_util_get_boolean (child, &conf->collect_connections);
 512                 else if (strcasecmp ("CollectESI", child->key) == 0)
 513                         cf_util_get_boolean (child, &conf->collect_esi);
 514                 else if (strcasecmp ("CollectBackend", child->key) == 0)
 515                         cf_util_get_boolean (child, &conf->collect_backend);
 516                 else if (strcasecmp ("CollectFetch", child->key) == 0)
 517                         cf_util_get_boolean (child, &conf->collect_fetch);
 518                 else if (strcasecmp ("CollectHCB", child->key) == 0)
 519                         cf_util_get_boolean (child, &conf->collect_hcb);
 520                 else if (strcasecmp ("CollectSHM", child->key) == 0)
 521                         cf_util_get_boolean (child, &conf->collect_shm);
 522                 else if (strcasecmp ("CollectSMA", child->key) == 0)
 523                         cf_util_get_boolean (child, &conf->collect_sma);
 524                 else if (strcasecmp ("CollectSMS", child->key) == 0)
 525                         cf_util_get_boolean (child, &conf->collect_sms);
 526                 else if (strcasecmp ("CollectSM", child->key) == 0)
 527                         cf_util_get_boolean (child, &conf->collect_sm);
 528                 else if (strcasecmp ("CollectTotals", child->key) == 0)
 529                         cf_util_get_boolean (child, &conf->collect_totals);
 530                 else if (strcasecmp ("CollectWorkers", child->key) == 0)
 531                         cf_util_get_boolean (child, &conf->collect_workers);
 532                 else
 533                 {
 534                         WARNING ("Varnish plugin: Ignoring unknown "
 535                                         "configuration option: \"%s\"",
 536                                         child->key);
 537                 }
 538         }
 539
 540         if (!conf->collect_cache
 541                         && !conf->collect_connections
 542                         && !conf->collect_esi
 543                         && !conf->collect_backend
 544                         && !conf->collect_fetch
 545                         && !conf->collect_hcb
 546                         && !conf->collect_shm
 547                         && !conf->collect_sma
 548                         && !conf->collect_sms
 549                         && !conf->collect_sm
 550                         && !conf->collect_totals
 551                         && !conf->collect_workers)
 552         {
 553                 WARNING ("Varnish plugin: No metric has been configured for "
 554                                 "instance \"%s\". Disabling this instance.",
 555                                 (conf->instance == NULL) ? "localhost" : conf->instance);
 556                 return (EINVAL);
 557         }
 558
 559         ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
 560                         (conf->instance == NULL) ? "localhost" : conf->instance);
 561
 562         ud.data = conf;
 563         ud.free_func = varnish_config_free;
 564
 565         plugin_register_complex_read (/* group = */ "varnish",
 566                         /* name      = */ callback_name,
 567                         /* callback  = */ varnish_read,
 568                         /* interval  = */ NULL,
 569                         /* user data = */ &ud);
 570
 571         have_instance = 1;
 572
 573         return (0);
 574 } /* }}} int varnish_config_instance */
 575
 576 static int varnish_config (oconfig_item_t *ci) /* {{{ */
 577 {
 578         int i;
 579
 580         for (i = 0; i < ci->children_num; i++)
 581         {
 582                 oconfig_item_t *child = ci->children + i;
 583
 584                 if (strcasecmp ("Instance", child->key) == 0)
 585                         varnish_config_instance (child);
 586                 else
 587                 {
 588                         WARNING ("Varnish plugin: Ignoring unknown "
 589                                         "configuration option: \"%s\"",
 590                                         child->key);
 591                 }
 592         }
 593
 594         return (0);
 595 } /* }}} int varnish_config */
 596
 597 void module_register (void) /* {{{ */
 598 {
 599         plugin_register_complex_config ("varnish", varnish_config);
 600         plugin_register_init ("varnish", varnish_init);
 601 } /* }}} */
 602
 603 /* vim: set sw=8 noet fdm=marker : */