src/varnish.c

   1 /**
   2  * collectd - src/varnish.c
   3  * Copyright (C) 2010      Jérôme Renard
   4  * Copyright (C) 2010      Marc Fournier
   5  * Copyright (C) 2010-2012 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 collectd.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 #if HAVE_VARNISH_V3
 138 # include <varnish/vsc.h>
 139 typedef struct VSC_C_main c_varnish_stats_t;
 140 #endif
 141
 142 #if HAVE_VARNISH_V2
 143 typedef struct varnish_stats c_varnish_stats_t;
 144 #endif
 145
 146 /* {{{ user_config_s */
 147 struct user_config_s {
 148         char *instance;
 149
 150         _Bool collect_cache;
 151         _Bool collect_connections;
 152         _Bool collect_esi;
 153         _Bool collect_backend;
 154         _Bool collect_fetch;
 155         _Bool collect_hcb;
 156         _Bool collect_shm;
 157         _Bool collect_sms;
 158 #if HAVE_VARNISH_V2
 159         _Bool collect_sm;
 160         _Bool collect_sma;
 161 #endif
 162         _Bool collect_totals;
 163         _Bool collect_workers;
 164 };
 165 typedef struct user_config_s user_config_t; /* }}} */
 166
 167 static _Bool have_instance = 0;
 168
 169 static int varnish_submit (const char *plugin_instance, /* {{{ */
 170                 const char *category, const char *type, const char *type_instance, value_t value)
 171 {
 172         value_list_t vl = VALUE_LIST_INIT;
 173
 174         vl.values = &value;
 175         vl.values_len = 1;
 176
 177         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 178
 179         sstrncpy (vl.plugin, "varnish", sizeof (vl.plugin));
 180
 181         if (plugin_instance == NULL)
 182                 plugin_instance = "default";
 183
 184         ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
 185                 "%s-%s", plugin_instance, category);
 186
 187         sstrncpy (vl.type, type, sizeof (vl.type));
 188
 189         if (type_instance != NULL)
 190                 sstrncpy (vl.type_instance, type_instance,
 191                                 sizeof (vl.type_instance));
 192
 193         return (plugin_dispatch_values (&vl));
 194 } /* }}} int varnish_submit */
 195
 196 static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
 197                 const char *category, const char *type, const char *type_instance,
 198                 uint64_t gauge_value)
 199 {
 200         value_t value;
 201
 202         value.gauge = (gauge_t) gauge_value;
 203
 204         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 205 } /* }}} int varnish_submit_gauge */
 206
 207 static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
 208                 const char *category, const char *type, const char *type_instance,
 209                 uint64_t derive_value)
 210 {
 211         value_t value;
 212
 213         value.derive = (derive_t) derive_value;
 214
 215         return (varnish_submit (plugin_instance, category, type, type_instance, value));
 216 } /* }}} int varnish_submit_derive */
 217
 218 static void varnish_monitor (const user_config_t *conf, /* {{{ */
 219                 const c_varnish_stats_t *stats)
 220 {
 221         if (conf->collect_cache)
 222         {
 223                 /* Cache hits */
 224                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hit",     stats->cache_hit);
 225                 /* Cache misses */
 226                 varnish_submit_derive (conf->instance, "cache", "cache_result", "miss",    stats->cache_miss);
 227                 /* Cache hits for pass */
 228                 varnish_submit_derive (conf->instance, "cache", "cache_result", "hitpass", stats->cache_hitpass);
 229         }
 230
 231         if (conf->collect_connections)
 232         {
 233                 /* Client connections accepted */
 234                 varnish_submit_derive (conf->instance, "connections", "connections", "accepted", stats->client_conn);
 235                 /* Connection dropped, no sess */
 236                 varnish_submit_derive (conf->instance, "connections", "connections", "dropped" , stats->client_drop);
 237                 /* Client requests received    */
 238                 varnish_submit_derive (conf->instance, "connections", "connections", "received", stats->client_req);
 239         }
 240
 241         if (conf->collect_esi)
 242         {
 243                 /* ESI parse errors (unlock)   */
 244                 varnish_submit_derive (conf->instance, "esi", "total_operations", "error",  stats->esi_errors);
 245 #if HAVE_VARNISH_V2
 246                 /* Objects ESI parsed (unlock) */
 247                 varnish_submit_derive (conf->instance, "esi", "total_operations", "parsed", stats->esi_parse);
 248 #endif
 249         }
 250
 251         if (conf->collect_backend)
 252         {
 253                 /* Backend conn. success       */
 254                 varnish_submit_derive (conf->instance, "backend", "connections", "success"      , stats->backend_conn);
 255                 /* Backend conn. not attempted */
 256                 varnish_submit_derive (conf->instance, "backend", "connections", "not-attempted", stats->backend_unhealthy);
 257                 /* Backend conn. too many      */
 258                 varnish_submit_derive (conf->instance, "backend", "connections", "too-many"     , stats->backend_busy);
 259                 /* Backend conn. failures      */
 260                 varnish_submit_derive (conf->instance, "backend", "connections", "failures"     , stats->backend_fail);
 261                 /* Backend conn. reuses        */
 262                 varnish_submit_derive (conf->instance, "backend", "connections", "reuses"       , stats->backend_reuse);
 263                 /* Backend conn. was closed    */
 264                 varnish_submit_derive (conf->instance, "backend", "connections", "was-closed"   , stats->backend_toolate);
 265                 /* Backend conn. recycles      */
 266                 varnish_submit_derive (conf->instance, "backend", "connections", "recycled"     , stats->backend_recycle);
 267 #if HAVE_VARNISH_V2
 268                 /* Backend conn. unused        */
 269                 varnish_submit_derive (conf->instance, "backend", "connections", "unused"       , stats->backend_unused);
 270 #endif
 271         }
 272
 273         if (conf->collect_fetch)
 274         {
 275                 /* Fetch head                */
 276                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "head"       , stats->fetch_head);
 277                 /* Fetch with length         */
 278                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "length"     , stats->fetch_length);
 279                 /* Fetch chunked             */
 280                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "chunked"    , stats->fetch_chunked);
 281                 /* Fetch EOF                 */
 282                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "eof"        , stats->fetch_eof);
 283                 /* Fetch bad headers         */
 284                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "bad_headers", stats->fetch_bad);
 285                 /* Fetch wanted close        */
 286                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "close"      , stats->fetch_close);
 287                 /* Fetch pre HTTP/1.1 closed */
 288                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "oldhttp"    , stats->fetch_oldhttp);
 289                 /* Fetch zero len            */
 290                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "zero"       , stats->fetch_zero);
 291                 /* Fetch failed              */
 292                 varnish_submit_derive (conf->instance, "fetch", "http_requests", "failed"     , stats->fetch_failed);
 293         }
 294
 295         if (conf->collect_hcb)
 296         {
 297                 /* HCB Lookups without lock */
 298                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_nolock", stats->hcb_nolock);
 299                 /* HCB Lookups with lock    */
 300                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_lock",   stats->hcb_lock);
 301                 /* HCB Inserts              */
 302                 varnish_submit_derive (conf->instance, "hcb", "cache_operation", "insert",        stats->hcb_insert);
 303         }
 304
 305         if (conf->collect_shm)
 306         {
 307                 /* SHM records                 */
 308                 varnish_submit_derive (conf->instance, "shm", "total_operations", "records"   , stats->shm_records);
 309                 /* SHM writes                  */
 310                 varnish_submit_derive (conf->instance, "shm", "total_operations", "writes"    , stats->shm_writes);
 311                 /* SHM flushes due to overflow */
 312                 varnish_submit_derive (conf->instance, "shm", "total_operations", "flushes"   , stats->shm_flushes);
 313                 /* SHM MTX contention          */
 314                 varnish_submit_derive (conf->instance, "shm", "total_operations", "contention", stats->shm_cont);
 315                 /* SHM cycles through buffer   */
 316                 varnish_submit_derive (conf->instance, "shm", "total_operations", "cycles"    , stats->shm_cycles);
 317         }
 318
 319 #if HAVE_VARNISH_V2
 320         if (conf->collect_sm)
 321         {
 322                 /* allocator requests */
 323                 varnish_submit_derive (conf->instance, "sm", "total_requests", "nreq",         stats->sm_nreq);
 324                 /* outstanding allocations */
 325                 varnish_submit_gauge (conf->instance,  "sm", "requests", "outstanding",        stats->sm_nobj);
 326                 /* bytes allocated */
 327                 varnish_submit_derive (conf->instance,  "sm", "total_bytes", "allocated",      stats->sm_balloc);
 328                 /* bytes free */
 329                 varnish_submit_derive (conf->instance,  "sm", "total_bytes", "free",           stats->sm_bfree);
 330         }
 331
 332         if (conf->collect_sma)
 333         {
 334                 /* SMA allocator requests */
 335                 varnish_submit_derive (conf->instance, "sma", "total_requests", "nreq",    stats->sma_nreq);
 336                 /* SMA outstanding allocations */
 337                 varnish_submit_gauge (conf->instance,  "sma", "requests", "outstanding",   stats->sma_nobj);
 338                 /* SMA outstanding bytes */
 339                 varnish_submit_gauge (conf->instance,  "sma", "bytes", "outstanding",      stats->sma_nbytes);
 340                 /* SMA bytes allocated */
 341                 varnish_submit_derive (conf->instance,  "sma", "total_bytes", "allocated", stats->sma_balloc);
 342                 /* SMA bytes free */
 343                 varnish_submit_derive (conf->instance,  "sma", "total_bytes", "free" ,     stats->sma_bfree);
 344         }
 345 #endif
 346
 347         if (conf->collect_sms)
 348         {
 349                 /* SMS allocator requests */
 350                 varnish_submit_derive (conf->instance, "sms", "total_requests", "allocator", stats->sms_nreq);
 351                 /* SMS outstanding allocations */
 352                 varnish_submit_gauge (conf->instance,  "sms", "requests", "outstanding",     stats->sms_nobj);
 353                 /* SMS outstanding bytes */
 354                 varnish_submit_gauge (conf->instance,  "sms", "bytes", "outstanding",        stats->sms_nbytes);
 355                 /* SMS bytes allocated */
 356                 varnish_submit_derive (conf->instance,  "sms", "total_bytes", "allocated",   stats->sms_balloc);
 357                 /* SMS bytes freed */
 358                 varnish_submit_derive (conf->instance,  "sms", "total_bytes", "free",        stats->sms_bfree);
 359         }
 360
 361         if (conf->collect_totals)
 362         {
 363                 /* Total Sessions */
 364                 varnish_submit_derive (conf->instance, "totals", "total_sessions", "sessions",  stats->s_sess);
 365                 /* Total Requests */
 366                 varnish_submit_derive (conf->instance, "totals", "total_requests", "requests",  stats->s_req);
 367                 /* Total pipe */
 368                 varnish_submit_derive (conf->instance, "totals", "total_operations", "pipe",    stats->s_pipe);
 369                 /* Total pass */
 370                 varnish_submit_derive (conf->instance, "totals", "total_operations", "pass",    stats->s_pass);
 371                 /* Total fetch */
 372                 varnish_submit_derive (conf->instance, "totals", "total_operations", "fetches", stats->s_fetch);
 373                 /* Total header bytes */
 374                 varnish_submit_derive (conf->instance, "totals", "total_bytes", "header-bytes", stats->s_hdrbytes);
 375                 /* Total body byte */
 376                 varnish_submit_derive (conf->instance, "totals", "total_bytes", "body-bytes",   stats->s_bodybytes);
 377         }
 378
 379         if (conf->collect_workers)
 380         {
 381                 /* worker threads */
 382                 varnish_submit_gauge (conf->instance, "workers", "threads", "worker",             stats->n_wrk);
 383                 /* worker threads created */
 384                 varnish_submit_derive (conf->instance, "workers", "total_threads", "created",     stats->n_wrk_create);
 385                 /* worker threads not created */
 386                 varnish_submit_derive (conf->instance, "workers", "total_threads", "failed",      stats->n_wrk_failed);
 387                 /* worker threads limited */
 388                 varnish_submit_derive (conf->instance, "workers", "total_threads", "limited",     stats->n_wrk_max);
 389                 /* dropped work requests */
 390                 varnish_submit_derive (conf->instance, "workers", "total_requests", "dropped",    stats->n_wrk_drop);
 391 #ifdef HAVE_VARNISH_V2
 392                 /* queued work requests */
 393                 varnish_submit_derive (conf->instance, "workers", "total_requests", "queued",     stats->n_wrk_queue);
 394                 /* overflowed work requests */
 395                 varnish_submit_derive (conf->instance, "workers", "total_requests", "overflowed", stats->n_wrk_overflow);
 396 #endif
 397         }
 398 } /* }}} void varnish_monitor */
 399
 400 #if HAVE_VARNISH_V3
 401 static int varnish_read (user_data_t *ud) /* {{{ */
 402 {
 403         struct VSM_data *vd;
 404         const c_varnish_stats_t *stats;
 405
 406         user_config_t *conf;
 407
 408         if ((ud == NULL) || (ud->data == NULL))
 409                 return (EINVAL);
 410
 411         conf = ud->data;
 412
 413         vd = VSM_New();
 414         VSC_Setup(vd);
 415
 416         if (conf->instance != NULL)
 417         {
 418                 int status;
 419
 420                 status = VSM_n_Arg (vd, conf->instance);
 421                 if (status < 0)
 422                 {
 423                         ERROR ("varnish plugin: VSM_n_Arg (\"%s\") failed "
 424                                         "with status %i.",
 425                                         conf->instance, status);
 426                         return (-1);
 427                 }
 428         }
 429
 430         if (VSC_Open (vd, /* diag = */ 1))
 431         {
 432                 ERROR ("varnish plugin: Unable to load statistics.");
 433
 434                 return (-1);
 435         }
 436
 437         stats = VSC_Main(vd);
 438
 439         varnish_monitor (conf, stats);
 440         VSM_Close (vd);
 441
 442         return (0);
 443 } /* }}} */
 444 #else /* if HAVE_VARNISH_V2 */
 445 static int varnish_read (user_data_t *ud) /* {{{ */
 446 {
 447         const c_varnish_stats_t *stats;
 448
 449         user_config_t *conf;
 450
 451         if ((ud == NULL) || (ud->data == NULL))
 452                 return (EINVAL);
 453
 454         conf = ud->data;
 455
 456         stats = VSL_OpenStats (conf->instance);
 457         if (stats == NULL)
 458         {
 459                 ERROR ("Varnish plugin : unable to load statistics");
 460
 461                 return (-1);
 462         }
 463
 464         varnish_monitor (conf, stats);
 465
 466         return (0);
 467 } /* }}} */
 468 #endif
 469
 470 static void varnish_config_free (void *ptr) /* {{{ */
 471 {
 472         user_config_t *conf = ptr;
 473
 474         if (conf == NULL)
 475                 return;
 476
 477         sfree (conf->instance);
 478         sfree (conf);
 479 } /* }}} */
 480
 481 static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
 482 {
 483         if (conf == NULL)
 484                 return (EINVAL);
 485
 486         conf->collect_backend     = 1;
 487         conf->collect_cache       = 1;
 488         conf->collect_connections = 1;
 489         conf->collect_esi         = 0;
 490         conf->collect_fetch       = 0;
 491         conf->collect_hcb         = 0;
 492         conf->collect_shm         = 1;
 493 #if HAVE_VARNISH_V2
 494         conf->collect_sm          = 0;
 495         conf->collect_sma         = 0;
 496 #endif
 497         conf->collect_sms         = 0;
 498         conf->collect_totals      = 0;
 499
 500         return (0);
 501 } /* }}} int varnish_config_apply_default */
 502
 503 static int varnish_init (void) /* {{{ */
 504 {
 505         user_config_t *conf;
 506         user_data_t ud;
 507
 508         if (have_instance)
 509                 return (0);
 510
 511         conf = malloc (sizeof (*conf));
 512         if (conf == NULL)
 513                 return (ENOMEM);
 514         memset (conf, 0, sizeof (*conf));
 515
 516         /* Default settings: */
 517         conf->instance = NULL;
 518
 519         varnish_config_apply_default (conf);
 520
 521         ud.data = conf;
 522         ud.free_func = varnish_config_free;
 523
 524         plugin_register_complex_read (/* group = */ "varnish",
 525                         /* name      = */ "varnish/localhost",
 526                         /* callback  = */ varnish_read,
 527                         /* interval  = */ NULL,
 528                         /* user data = */ &ud);
 529
 530         return (0);
 531 } /* }}} int varnish_init */
 532
 533 static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
 534 {
 535         user_config_t *conf;
 536         user_data_t ud;
 537         char callback_name[DATA_MAX_NAME_LEN];
 538         int i;
 539
 540         conf = malloc (sizeof (*conf));
 541         if (conf == NULL)
 542                 return (ENOMEM);
 543         memset (conf, 0, sizeof (*conf));
 544         conf->instance = NULL;
 545
 546         varnish_config_apply_default (conf);
 547
 548         if (ci->values_num == 1)
 549         {
 550                 int status;
 551
 552                 status = cf_util_get_string (ci, &conf->instance);
 553                 if (status != 0)
 554                 {
 555                         sfree (conf);
 556                         return (status);
 557                 }
 558                 assert (conf->instance != NULL);
 559
 560                 if (strcmp ("localhost", conf->instance) == 0)
 561                 {
 562                         sfree (conf->instance);
 563                         conf->instance = NULL;
 564                 }
 565         }
 566         else if (ci->values_num > 1)
 567         {
 568                 WARNING ("Varnish plugin: \"Instance\" blocks accept only "
 569                                 "one argument.");
 570                 return (EINVAL);
 571         }
 572
 573         for (i = 0; i < ci->children_num; i++)
 574         {
 575                 oconfig_item_t *child = ci->children + i;
 576
 577                 if (strcasecmp ("CollectCache", child->key) == 0)
 578                         cf_util_get_boolean (child, &conf->collect_cache);
 579                 else if (strcasecmp ("CollectConnections", child->key) == 0)
 580                         cf_util_get_boolean (child, &conf->collect_connections);
 581                 else if (strcasecmp ("CollectESI", child->key) == 0)
 582                         cf_util_get_boolean (child, &conf->collect_esi);
 583                 else if (strcasecmp ("CollectBackend", child->key) == 0)
 584                         cf_util_get_boolean (child, &conf->collect_backend);
 585                 else if (strcasecmp ("CollectFetch", child->key) == 0)
 586                         cf_util_get_boolean (child, &conf->collect_fetch);
 587                 else if (strcasecmp ("CollectHCB", child->key) == 0)
 588                         cf_util_get_boolean (child, &conf->collect_hcb);
 589                 else if (strcasecmp ("CollectSHM", child->key) == 0)
 590                         cf_util_get_boolean (child, &conf->collect_shm);
 591                 else if (strcasecmp ("CollectSMS", child->key) == 0)
 592                         cf_util_get_boolean (child, &conf->collect_sms);
 593 #if HAVE_VARNISH_V2
 594                 else if (strcasecmp ("CollectSMA", child->key) == 0)
 595                         cf_util_get_boolean (child, &conf->collect_sma);
 596                 else if (strcasecmp ("CollectSM", child->key) == 0)
 597                         cf_util_get_boolean (child, &conf->collect_sm);
 598 #endif
 599                 else if (strcasecmp ("CollectTotals", child->key) == 0)
 600                         cf_util_get_boolean (child, &conf->collect_totals);
 601                 else if (strcasecmp ("CollectWorkers", child->key) == 0)
 602                         cf_util_get_boolean (child, &conf->collect_workers);
 603                 else
 604                 {
 605                         WARNING ("Varnish plugin: Ignoring unknown "
 606                                         "configuration option: \"%s\". Did "
 607                                         "you forget to add an <Instance /> "
 608                                         "block around the configuration?",
 609                                         child->key);
 610                 }
 611         }
 612
 613         if (!conf->collect_cache
 614                         && !conf->collect_connections
 615                         && !conf->collect_esi
 616                         && !conf->collect_backend
 617                         && !conf->collect_fetch
 618                         && !conf->collect_hcb
 619                         && !conf->collect_shm
 620                         && !conf->collect_sms
 621 #if HAVE_VARNISH_V2
 622                         && !conf->collect_sma
 623                         && !conf->collect_sm
 624 #endif
 625                         && !conf->collect_totals
 626                         && !conf->collect_workers)
 627         {
 628                 WARNING ("Varnish plugin: No metric has been configured for "
 629                                 "instance \"%s\". Disabling this instance.",
 630                                 (conf->instance == NULL) ? "localhost" : conf->instance);
 631                 return (EINVAL);
 632         }
 633
 634         ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
 635                         (conf->instance == NULL) ? "localhost" : conf->instance);
 636
 637         ud.data = conf;
 638         ud.free_func = varnish_config_free;
 639
 640         plugin_register_complex_read (/* group = */ "varnish",
 641                         /* name      = */ callback_name,
 642                         /* callback  = */ varnish_read,
 643                         /* interval  = */ NULL,
 644                         /* user data = */ &ud);
 645
 646         have_instance = 1;
 647
 648         return (0);
 649 } /* }}} int varnish_config_instance */
 650
 651 static int varnish_config (oconfig_item_t *ci) /* {{{ */
 652 {
 653         int i;
 654
 655         for (i = 0; i < ci->children_num; i++)
 656         {
 657                 oconfig_item_t *child = ci->children + i;
 658
 659                 if (strcasecmp ("Instance", child->key) == 0)
 660                         varnish_config_instance (child);
 661                 else
 662                 {
 663                         WARNING ("Varnish plugin: Ignoring unknown "
 664                                         "configuration option: \"%s\"",
 665                                         child->key);
 666                 }
 667         }
 668
 669         return (0);
 670 } /* }}} int varnish_config */
 671
 672 void module_register (void) /* {{{ */
 673 {
 674         plugin_register_complex_config ("varnish", varnish_config);
 675         plugin_register_init ("varnish", varnish_init);
 676 } /* }}} */
 677
 678 /* vim: set sw=8 noet fdm=marker : */