varnish plugin: add missing fields
[collectd.git] / src / varnish.c
index 1d07945..f7bca41 100644 (file)
@@ -1,6 +1,8 @@
 /**
  * collectd - src/varnish.c
- * Copyright (C) 2010 Jerome Renard
+ * Copyright (C) 2010      Jérôme Renard
+ * Copyright (C) 2010      Marc Fournier
+ * Copyright (C) 2010-2012 Florian Forster
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  *
  * Authors:
- *   Jerome Renard <jerome.renard@gmail.com>
+ *   Jérôme Renard <jerome.renard at gmail.com>
+ *   Marc Fournier <marc.fournier at camptocamp.com>
+ *   Florian octo Forster <octo at collectd.org>
  **/
 
-/**
- * Current list of what is monitored and what is not monitored (yet)
- *
- * Field name           Description                           Monitored
- * ----------           -----------                           ---------
- * uptime               Child uptime                              N
- * client_conn          Client connections accepted               Y
- * client_drop          Connection dropped, no sess               Y
- * client_req           Client requests received                  Y
- * cache_hit            Cache hits                                Y
- * cache_hitpass        Cache hits for pass                       Y
- * cache_miss           Cache misses                              Y
- * backend_conn         Backend conn. success                     Y
- * backend_unhealthy    Backend conn. not attempted               Y
- * backend_busy         Backend conn. too many                    Y
- * backend_fail         Backend conn. failures                    Y
- * backend_reuse        Backend conn. reuses                      Y
- * backend_toolate      Backend conn. was closed                  Y
- * backend_recycle      Backend conn. recycles                    Y
- * backend_unused       Backend conn. unused                      Y
- * fetch_head           Fetch head                                Y
- * fetch_length         Fetch with Length                         Y
- * fetch_chunked        Fetch chunked                             Y
- * fetch_eof            Fetch EOF                                 Y
- * fetch_bad            Fetch had bad headers                     Y
- * fetch_close          Fetch wanted close                        Y
- * fetch_oldhttp        Fetch pre HTTP/1.1 closed                 Y
- * fetch_zero           Fetch zero len                            Y
- * fetch_failed         Fetch failed                              Y
- * n_sess_mem           N struct sess_mem                         N
- * n_sess               N struct sess                             N
- * n_object             N struct object                           N
- * n_vampireobject      N unresurrected objects                   N
- * n_objectcore         N struct objectcore                       N
- * n_objecthead         N struct objecthead                       N
- * n_smf                N struct smf                              N
- * n_smf_frag           N small free smf                          N
- * n_smf_large          N large free smf                          N
- * n_vbe_conn           N struct vbe_conn                         N
- * n_wrk                N worker threads                          N
- * n_wrk_create         N worker threads created                  N
- * n_wrk_failed         N worker threads not created              N
- * n_wrk_max            N worker threads limited                  N
- * n_wrk_queue          N queued work requests                    N
- * n_wrk_overflow       N overflowed work requests                N
- * n_wrk_drop           N dropped work requests                   N
- * n_backend            N backends                                N
- * n_expired            N expired objects                         N
- * n_lru_nuked          N LRU nuked objects                       N
- * n_lru_saved          N LRU saved objects                       N
- * n_lru_moved          N LRU moved objects                       N
- * n_deathrow           N objects on deathrow                     N
- * losthdr              HTTP header overflows                     N
- * n_objsendfile        Objects sent with sendfile                N
- * n_objwrite           Objects sent with write                   N
- * n_objoverflow        Objects overflowing workspace             N
- * s_sess               Total Sessions                            N
- * s_req                Total Requests                            N
- * s_pipe               Total pipe                                N
- * s_pass               Total pass                                N
- * s_fetch              Total fetch                               N
- * s_hdrbytes           Total header bytes                        N
- * s_bodybytes          Total body bytes                          N
- * sess_closed          Session Closed                            N
- * sess_pipeline        Session Pipeline                          N
- * sess_readahead       Session Read Ahead                        N
- * sess_linger          Session Linger                            N
- * sess_herd            Session herd                              N
- * shm_records          SHM records                               Y
- * shm_writes           SHM writes                                Y
- * shm_flushes          SHM flushes due to overflow               Y
- * shm_cont             SHM MTX contention                        Y
- * shm_cycles           SHM cycles through buffer                 Y
- * sm_nreq              allocator requests                        Y
- * sm_nobj              outstanding allocations                   Y
- * sm_balloc            bytes allocated                           Y
- * sm_bfree             bytes free                                Y
- * sma_nreq             SMA allocator requests                    Y
- * sma_nobj             SMA outstanding allocations               Y
- * sma_nbytes           SMA outstanding bytes                     Y
- * sma_balloc           SMA bytes allocated                       Y
- * sma_bfree            SMA bytes free                            Y
- * sms_nreq             SMS allocator requests                    Y
- * sms_nobj             SMS outstanding allocations               Y
- * sms_nbytes           SMS outstanding bytes                     Y
- * sms_balloc           SMS bytes allocated                       Y
- * sms_bfree            SMS bytes freed                           Y
- * backend_req          Backend requests made                     N
- * n_vcl                N vcl total                               N
- * n_vcl_avail          N vcl available                           N
- * n_vcl_discard        N vcl discarded                           N
- * n_purge              N total active purges                     N
- * n_purge_add          N new purges added                        N
- * n_purge_retire       N old purges deleted                      N
- * n_purge_obj_test     N objects tested                          N
- * n_purge_re_test      N regexps tested against                  N
- * n_purge_dups         N duplicate purges removed                N
- * hcb_nolock           HCB Lookups without lock                  Y
- * hcb_lock             HCB Lookups with lock                     Y
- * hcb_insert           HCB Inserts                               Y
- * esi_parse            Objects ESI parsed (unlock)               Y
- * esi_errors           ESI parse errors (unlock)                 Y
- */
 #include "collectd.h"
 #include "common.h"
 #include "plugin.h"
+#include "configfile.h"
 
 #include <varnish/varnishapi.h>
 
-#define USER_CONFIG_INIT {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
-#define SET_MONITOR_FLAG(name, flag, value) if((strcasecmp(name, key) == 0) && IS_TRUE(value)) user_config.flag = 1
+#if HAVE_VARNISH_V3
+# include <varnish/vsc.h>
+typedef struct VSC_C_main c_varnish_stats_t;
+#endif
+
+#if HAVE_VARNISH_V2
+typedef struct varnish_stats c_varnish_stats_t;
+#endif
 
 /* {{{ user_config_s */
 struct user_config_s {
-       int monitor_cache;
-       int monitor_connections;
-       int monitor_esi;
-       int monitor_backend;
-       int monitor_fetch;
-       int monitor_hcb;
-       int monitor_shm;
-       int monitor_sma;
-       int monitor_sms;
-       int monitor_sm;
-};
+       char *instance;
 
+       _Bool collect_cache;
+       _Bool collect_connections;
+       _Bool collect_esi;
+       _Bool collect_backend;
+#ifdef HAVE_VARNISH_V3
+       _Bool collect_dirdns;
+#endif
+       _Bool collect_fetch;
+       _Bool collect_hcb;
+       _Bool collect_objects;
+#if HAVE_VARNISH_V2
+       _Bool collect_purge;
+#else
+       _Bool collect_ban;
+#endif
+       _Bool collect_session;
+       _Bool collect_shm;
+       _Bool collect_sms;
+#if HAVE_VARNISH_V2
+       _Bool collect_sm;
+       _Bool collect_sma;
+#endif
+       _Bool collect_struct;
+       _Bool collect_totals;
+       _Bool collect_uptime;
+       _Bool collect_vcl;
+       _Bool collect_workers;
+};
 typedef struct user_config_s user_config_t; /* }}} */
 
-/* {{{ Configuration directives */
-static user_config_t user_config = USER_CONFIG_INIT;
+static _Bool have_instance = 0;
 
-static const char *config_keys[] =
+static int varnish_submit (const char *plugin_instance, /* {{{ */
+               const char *category, const char *type, const char *type_instance, value_t value)
 {
-  "MonitorCache",
-  "MonitorConnections",
-  "MonitorESI",
-  "MonitorBackend",
-  "MonitorFetch",
-  "MonitorHCB",
-  "MonitorSHM",
-  "MonitorSMA",
-  "MonitorSMS",
-  "MonitorSM"
-};
+       value_list_t vl = VALUE_LIST_INIT;
+
+       vl.values = &value;
+       vl.values_len = 1;
 
-static int config_keys_num = STATIC_ARRAY_SIZE (config_keys); /* }}} */
+       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 
-static int varnish_config(const char *key, const char *value) /* {{{ */
-{
-       SET_MONITOR_FLAG("MonitorCache"      , monitor_cache      , value);
-       SET_MONITOR_FLAG("MonitorConnections", monitor_connections, value);
-       SET_MONITOR_FLAG("MonitorESI"        , monitor_esi        , value);
-       SET_MONITOR_FLAG("MonitorBackend"    , monitor_backend    , value);
-       SET_MONITOR_FLAG("MonitorFetch"      , monitor_fetch      , value);
-       SET_MONITOR_FLAG("MonitorHCB"        , monitor_hcb        , value);
-       SET_MONITOR_FLAG("MonitorSHM"        , monitor_shm        , value);
-       SET_MONITOR_FLAG("MonitorSMA"        , monitor_sma        , value);
-       SET_MONITOR_FLAG("MonitorSMS"        , monitor_sms        , value);
-       SET_MONITOR_FLAG("MonitorSM"         , monitor_sm         , value);
+       sstrncpy (vl.plugin, "varnish", sizeof (vl.plugin));
 
-       return (0);
-} /* }}} */
+       if (plugin_instance == NULL)
+               plugin_instance = "default";
+
+       ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
+               "%s-%s", plugin_instance, category);
+
+       sstrncpy (vl.type, type, sizeof (vl.type));
+
+       if (type_instance != NULL)
+               sstrncpy (vl.type_instance, type_instance,
+                               sizeof (vl.type_instance));
+
+       return (plugin_dispatch_values (&vl));
+} /* }}} int varnish_submit */
 
-static void varnish_submit(const char *type, const char *type_instance, gauge_t value) /* {{{ */
+static int varnish_submit_gauge (const char *plugin_instance, /* {{{ */
+               const char *category, const char *type, const char *type_instance,
+               uint64_t gauge_value)
 {
-       value_t values[1];
-       value_list_t vl = VALUE_LIST_INIT;
+       value_t value;
 
-       values[0].gauge = value;
-       vl.values_len = 1;
-       vl.values = values;
+       value.gauge = (gauge_t) gauge_value;
 
-       sstrncpy(vl.host         , hostname_g   , sizeof(vl.host));
-       sstrncpy(vl.plugin       , "varnish"    , sizeof(vl.plugin));
-       sstrncpy(vl.type         , type         , sizeof(vl.type));
-       sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
+       return (varnish_submit (plugin_instance, category, type, type_instance, value));
+} /* }}} int varnish_submit_gauge */
 
-       plugin_dispatch_values(&vl);
-} /* }}} */
+static int varnish_submit_derive (const char *plugin_instance, /* {{{ */
+               const char *category, const char *type, const char *type_instance,
+               uint64_t derive_value)
+{
+       value_t value;
 
-static void varnish_monitor(struct varnish_stats *VSL_stats) /* {{{ */
+       value.derive = (derive_t) derive_value;
+
+       return (varnish_submit (plugin_instance, category, type, type_instance, value));
+} /* }}} int varnish_submit_derive */
+
+static void varnish_monitor (const user_config_t *conf, /* {{{ */
+               const c_varnish_stats_t *stats)
 {
-       if(user_config.monitor_cache == 1)
+       if (conf->collect_cache)
+       {
+               /* Cache hits */
+               varnish_submit_derive (conf->instance, "cache", "cache_result", "hit",     stats->cache_hit);
+               /* Cache misses */
+               varnish_submit_derive (conf->instance, "cache", "cache_result", "miss",    stats->cache_miss);
+               /* Cache hits for pass */
+               varnish_submit_derive (conf->instance, "cache", "cache_result", "hitpass", stats->cache_hitpass);
+       }
+
+       if (conf->collect_connections)
        {
-               varnish_submit("varnish_cache_ratio", "cache_hit"    , VSL_stats->cache_hit);     /* Cache hits          */
-               varnish_submit("varnish_cache_ratio", "cache_miss"   , VSL_stats->cache_miss);    /* Cache misses        */
-               varnish_submit("varnish_cache_ratio", "cache_hitpass", VSL_stats->cache_hitpass); /* Cache hits for pass */
+               /* Client connections accepted */
+               varnish_submit_derive (conf->instance, "connections", "connections", "accepted", stats->client_conn);
+               /* Connection dropped, no sess */
+               varnish_submit_derive (conf->instance, "connections", "connections", "dropped" , stats->client_drop);
+               /* Client requests received    */
+               varnish_submit_derive (conf->instance, "connections", "connections", "received", stats->client_req);
        }
 
-       if(user_config.monitor_connections == 1)
+#ifdef HAVE_VARNISH_V3
+       if (conf->collect_dirdns)
        {
-               varnish_submit("varnish_connections", "client_connections-accepted", VSL_stats->client_conn); /* Client connections accepted */
-               varnish_submit("varnish_connections", "client_connections-dropped" , VSL_stats->client_drop); /* Connection dropped, no sess */
-               varnish_submit("varnish_connections", "client_connections-received", VSL_stats->client_req);  /* Client requests received    */
+               /* DNS director lookups */
+               varnish_submit_derive (conf->instance, "dirdns", "cache_operation", "lookups",    stats->dir_dns_lookups);
+               /* DNS director failed lookups */
+               varnish_submit_derive (conf->instance, "dirdns", "cache_result",    "failed",     stats->dir_dns_failed);
+               /* DNS director cached lookups hit */
+               varnish_submit_derive (conf->instance, "dirdns", "cache_result",    "hits",       stats->dir_dns_hit);
+               /* DNS director full dnscache */
+               varnish_submit_derive (conf->instance, "dirdns", "cache_result",    "cache_full", stats->dir_dns_cache_full);
        }
+#endif
 
-       if(user_config.monitor_esi == 1)
+       if (conf->collect_esi)
        {
-               varnish_submit("varnish_esi", "esi_parsed", VSL_stats->esi_parse);  /* Objects ESI parsed (unlock) */
-               varnish_submit("varnish_esi", "esi_errors", VSL_stats->esi_errors); /* ESI parse errors (unlock)   */
+               /* ESI parse errors (unlock)   */
+               varnish_submit_derive (conf->instance, "esi", "total_operations", "error",   stats->esi_errors);
+#if HAVE_VARNISH_V2
+               /* Objects ESI parsed (unlock) */
+               varnish_submit_derive (conf->instance, "esi", "total_operations", "parsed",  stats->esi_parse);
+#else
+               /* ESI parse warnings (unlock) */
+               varnish_submit_derive (conf->instance, "esi", "total_operations", "warning", stats->esi_warnings);
+#endif
        }
 
-       if(user_config.monitor_backend == 1)
+       if (conf->collect_backend)
        {
-               varnish_submit("varnish_backend_connections", "backend_connections-success"      , VSL_stats->backend_conn);      /* Backend conn. success       */
-               varnish_submit("varnish_backend_connections", "backend_connections-not-attempted", VSL_stats->backend_unhealthy); /* Backend conn. not attempted */
-               varnish_submit("varnish_backend_connections", "backend_connections-too-many"     , VSL_stats->backend_busy);      /* Backend conn. too many      */
-               varnish_submit("varnish_backend_connections", "backend_connections-failures"     , VSL_stats->backend_fail);      /* Backend conn. failures      */
-               varnish_submit("varnish_backend_connections", "backend_connections-reuses"       , VSL_stats->backend_reuse);     /* Backend conn. reuses        */
-               varnish_submit("varnish_backend_connections", "backend_connections-was-closed"   , VSL_stats->backend_toolate);   /* Backend conn. was closed    */
-               varnish_submit("varnish_backend_connections", "backend_connections-recycles"     , VSL_stats->backend_recycle);   /* Backend conn. recycles      */
-               varnish_submit("varnish_backend_connections", "backend_connections-unused"       , VSL_stats->backend_unused);    /* Backend conn. unused        */
+               /* Backend conn. success       */
+               varnish_submit_derive (conf->instance, "backend", "connections", "success"      , stats->backend_conn);
+               /* Backend conn. not attempted */
+               varnish_submit_derive (conf->instance, "backend", "connections", "not-attempted", stats->backend_unhealthy);
+               /* Backend conn. too many      */
+               varnish_submit_derive (conf->instance, "backend", "connections", "too-many"     , stats->backend_busy);
+               /* Backend conn. failures      */
+               varnish_submit_derive (conf->instance, "backend", "connections", "failures"     , stats->backend_fail);
+               /* Backend conn. reuses        */
+               varnish_submit_derive (conf->instance, "backend", "connections", "reuses"       , stats->backend_reuse);
+               /* Backend conn. was closed    */
+               varnish_submit_derive (conf->instance, "backend", "connections", "was-closed"   , stats->backend_toolate);
+               /* Backend conn. recycles      */
+               varnish_submit_derive (conf->instance, "backend", "connections", "recycled"     , stats->backend_recycle);
+#if HAVE_VARNISH_V2
+               /* Backend conn. unused        */
+               varnish_submit_derive (conf->instance, "backend", "connections", "unused"       , stats->backend_unused);
+#else
+               /* Backend conn. retry         */
+               varnish_submit_derive (conf->instance, "backend", "connections", "retries"      , stats->backend_retry);
+#endif
+               /* Backend requests mades      */
+               varnish_submit_derive (conf->instance, "backend", "http_requests", "requests"   , stats->backend_req);
+               /* N backends                  */
+               varnish_submit_gauge  (conf->instance, "backend", "backends", "n_backends"      , stats->n_backend);
        }
 
-       if(user_config.monitor_fetch == 1)
+       if (conf->collect_fetch)
        {
-               varnish_submit("varnish_fetch", "fetch_head"       , VSL_stats->fetch_head);    /* Fetch head                */
-               varnish_submit("varnish_fetch", "fetch_length"     , VSL_stats->fetch_length);  /* Fetch with length         */
-               varnish_submit("varnish_fetch", "fetch_chunked"    , VSL_stats->fetch_chunked); /* Fetch chunked             */
-               varnish_submit("varnish_fetch", "fetch_eof"        , VSL_stats->fetch_eof);     /* Fetch EOF                 */
-               varnish_submit("varnish_fetch", "fetch_bad-headers", VSL_stats->fetch_bad);     /* Fetch bad headers         */
-               varnish_submit("varnish_fetch", "fetch_close"      , VSL_stats->fetch_close);   /* Fetch wanted close        */
-               varnish_submit("varnish_fetch", "fetch_oldhttp"    , VSL_stats->fetch_oldhttp); /* Fetch pre HTTP/1.1 closed */
-               varnish_submit("varnish_fetch", "fetch_zero"       , VSL_stats->fetch_zero);    /* Fetch zero len            */
-               varnish_submit("varnish_fetch", "fetch_failed"     , VSL_stats->fetch_failed);  /* Fetch failed              */
+               /* Fetch head                */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "head"       , stats->fetch_head);
+               /* Fetch with length         */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "length"     , stats->fetch_length);
+               /* Fetch chunked             */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "chunked"    , stats->fetch_chunked);
+               /* Fetch EOF                 */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "eof"        , stats->fetch_eof);
+               /* Fetch bad headers         */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "bad_headers", stats->fetch_bad);
+               /* Fetch wanted close        */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "close"      , stats->fetch_close);
+               /* Fetch pre HTTP/1.1 closed */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "oldhttp"    , stats->fetch_oldhttp);
+               /* Fetch zero len            */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "zero"       , stats->fetch_zero);
+               /* Fetch failed              */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "failed"     , stats->fetch_failed);
+#if HAVE_VARNISH_V3
+               /* Fetch no body (1xx)       */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "no_body_1xx", stats->fetch_1xx);
+               /* Fetch no body (204)       */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "no_body_204", stats->fetch_204);
+               /* Fetch no body (304)       */
+               varnish_submit_derive (conf->instance, "fetch", "http_requests", "no_body_304", stats->fetch_304);
+#endif
        }
 
-       if(user_config.monitor_hcb == 1)
+       if (conf->collect_hcb)
        {
-               varnish_submit("varnish_hcb", "hcb_nolock", VSL_stats->hcb_nolock); /* HCB Lookups without lock */
-               varnish_submit("varnish_hcb", "hcb_lock"  , VSL_stats->hcb_lock);   /* HCB Lookups with lock    */
-               varnish_submit("varnish_hcb", "hcb_insert", VSL_stats->hcb_insert); /* HCB Inserts              */
+               /* HCB Lookups without lock */
+               varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_nolock", stats->hcb_nolock);
+               /* HCB Lookups with lock    */
+               varnish_submit_derive (conf->instance, "hcb", "cache_operation", "lookup_lock",   stats->hcb_lock);
+               /* HCB Inserts              */
+               varnish_submit_derive (conf->instance, "hcb", "cache_operation", "insert",        stats->hcb_insert);
        }
 
-       if(user_config.monitor_shm == 1)
+       if (conf->collect_objects)
        {
-               varnish_submit("varnish_shm", "shm_records"   , VSL_stats->shm_records); /* SHM records                 */
-               varnish_submit("varnish_shm", "shm_writes"    , VSL_stats->shm_writes);  /* SHM writes                  */
-               varnish_submit("varnish_shm", "shm_flushes"   , VSL_stats->shm_flushes); /* SHM flushes due to overflow */
-               varnish_submit("varnish_shm", "shm_contention", VSL_stats->shm_cont);    /* SHM MTX contention          */
-               varnish_submit("varnish_shm", "shm_cycles"    , VSL_stats->shm_cycles);  /* SHM cycles through buffer   */
+               /* N expired objects             */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "expired",            stats->n_expired);
+               /* N LRU nuked objects           */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "lru_nuked",          stats->n_lru_nuked);
+#if HAVE_VARNISH_V2
+               /* N LRU saved objects           */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "lru_saved",          stats->n_lru_saved);
+#endif
+               /* N LRU moved objects           */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "lru_moved",          stats->n_lru_moved);
+#if HAVE_VARNISH_V2
+               /* N objects on deathrow         */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "deathrow",           stats->n_deathrow);
+#endif
+               /* HTTP header overflows         */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "header_overflow",    stats->losthdr);
+               /* Objects sent with sendfile    */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "sent_sendfile",      stats->n_objsendfile);
+               /* Objects sent with write       */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "sent_write",         stats->n_objwrite);
+               /* Objects overflowing workspace */
+               varnish_submit_derive (conf->instance, "objects", "total_objects", "workspace_overflow", stats->n_objoverflow);
        }
 
-       if(user_config.monitor_sma == 1)
+#if HAVE_VARNISH_V2
+       if (conf->collect_purge)
+       {
+               /* N total active purges      */
+               varnish_submit_derive (conf->instance, "purge", "total_operations", "total",            stats->n_purge);
+               /* N new purges added         */
+               varnish_submit_derive (conf->instance, "purge", "total_operations", "added",            stats->n_purge_add);
+               /* N old purges deleted       */
+               varnish_submit_derive (conf->instance, "purge", "total_operations", "deleted",          stats->n_purge_retire);
+               /* N objects tested           */
+               varnish_submit_derive (conf->instance, "purge", "total_operations", "objects_tested",   stats->n_purge_obj_test);
+               /* N regexps tested against   */
+               varnish_submit_derive (conf->instance, "purge", "total_operations", "regexps_tested",   stats->n_purge_re_test);
+               /* N duplicate purges removed */
+               varnish_submit_derive (conf->instance, "purge", "total_operations", "duplicate",        stats->n_purge_dups);
+       }
+#else
+       if (conf->collect_ban)
        {
-               varnish_submit("varnish_sma", "sma_req"   , VSL_stats->sma_nreq);   /* SMA allocator requests      */
-               varnish_submit("varnish_sma", "sma_nobj"  , VSL_stats->sma_nobj);   /* SMA outstanding allocations */
-               varnish_submit("varnish_sma", "sma_nbytes", VSL_stats->sma_nbytes); /* SMA outstanding bytes       */
-               varnish_submit("varnish_sma", "sma_balloc", VSL_stats->sma_balloc); /* SMA bytes allocated         */
-               varnish_submit("varnish_sma", "sma_bfree" , VSL_stats->sma_bfree);  /* SMA bytes free              */
+               /* N total active bans      */
+               varnish_submit_derive (conf->instance, "ban", "total_operations", "total",          stats->n_ban);
+               /* N new bans added         */
+               varnish_submit_derive (conf->instance, "ban", "total_operations", "added",          stats->n_ban_add);
+               /* N old bans deleted       */
+               varnish_submit_derive (conf->instance, "ban", "total_operations", "deleted",        stats->n_ban_retire);
+               /* N objects tested         */
+               varnish_submit_derive (conf->instance, "ban", "total_operations", "objects_tested", stats->n_ban_obj_test);
+               /* N regexps tested against */
+               varnish_submit_derive (conf->instance, "ban", "total_operations", "regexps_tested", stats->n_ban_re_test);
+               /* N duplicate bans removed */
+               varnish_submit_derive (conf->instance, "ban", "total_operations", "duplicate",      stats->n_ban_dups);
        }
+#endif
 
-       if(user_config.monitor_sms == 1)
+       if (conf->collect_session)
        {
-               varnish_submit("varnish_sms", "sms_nreq"  , VSL_stats->sms_nreq);   /* SMS allocator requests      */
-               varnish_submit("varnish_sms", "sms_nobj"  , VSL_stats->sms_nobj);   /* SMS outstanding allocations */
-               varnish_submit("varnish_sms", "sms_nbytes", VSL_stats->sms_nbytes); /* SMS outstanding bytes       */
-               varnish_submit("varnish_sms", "sms_balloc", VSL_stats->sms_balloc); /* SMS bytes allocated         */
-               varnish_submit("varnish_sms", "sms_bfree" , VSL_stats->sms_bfree);  /* SMS bytes freed             */
+               /* Session Closed     */
+               varnish_submit_derive (conf->instance, "session", "total_operations", "closed",    stats->sess_closed);
+               /* Session Pipeline   */
+               varnish_submit_derive (conf->instance, "session", "total_operations", "pipeline",  stats->sess_pipeline);
+               /* Session Read Ahead */
+               varnish_submit_derive (conf->instance, "session", "total_operations", "readahead", stats->sess_readahead);
+               /* Session Linger     */
+               varnish_submit_derive (conf->instance, "session", "total_operations", "linger",    stats->sess_linger);
+               /* Session herd       */
+               varnish_submit_derive (conf->instance, "session", "total_operations", "herd",      stats->sess_herd);
        }
 
-       if(user_config.monitor_sm == 1)
+       if (conf->collect_shm)
        {
-               varnish_submit("varnish_sm", "sm_nreq"  , VSL_stats->sm_nreq);   /* allocator requests      */
-               varnish_submit("varnish_sm", "sm_nobj"  , VSL_stats->sm_nobj);   /* outstanding allocations */
-               varnish_submit("varnish_sm", "sm_balloc", VSL_stats->sm_balloc); /* bytes allocated         */
-               varnish_submit("varnish_sm", "sm_bfree" , VSL_stats->sm_bfree);  /* bytes free              */
+               /* SHM records                 */
+               varnish_submit_derive (conf->instance, "shm", "total_operations", "records"   , stats->shm_records);
+               /* SHM writes                  */
+               varnish_submit_derive (conf->instance, "shm", "total_operations", "writes"    , stats->shm_writes);
+               /* SHM flushes due to overflow */
+               varnish_submit_derive (conf->instance, "shm", "total_operations", "flushes"   , stats->shm_flushes);
+               /* SHM MTX contention          */
+               varnish_submit_derive (conf->instance, "shm", "total_operations", "contention", stats->shm_cont);
+               /* SHM cycles through buffer   */
+               varnish_submit_derive (conf->instance, "shm", "total_operations", "cycles"    , stats->shm_cycles);
        }
-} /* }}} */
 
-static int varnish_read(void) /* {{{ */
+#if HAVE_VARNISH_V2
+       if (conf->collect_sm)
+       {
+               /* allocator requests */
+               varnish_submit_derive (conf->instance, "sm", "total_requests", "nreq",         stats->sm_nreq);
+               /* outstanding allocations */
+               varnish_submit_gauge (conf->instance,  "sm", "requests", "outstanding",        stats->sm_nobj);
+               /* bytes allocated */
+               varnish_submit_derive (conf->instance,  "sm", "total_bytes", "allocated",      stats->sm_balloc);
+               /* bytes free */
+               varnish_submit_derive (conf->instance,  "sm", "total_bytes", "free",           stats->sm_bfree);
+       }
+
+       if (conf->collect_sma)
+       {
+               /* SMA allocator requests */
+               varnish_submit_derive (conf->instance, "sma", "total_requests", "nreq",    stats->sma_nreq);
+               /* SMA outstanding allocations */
+               varnish_submit_gauge (conf->instance,  "sma", "requests", "outstanding",   stats->sma_nobj);
+               /* SMA outstanding bytes */
+               varnish_submit_gauge (conf->instance,  "sma", "bytes", "outstanding",      stats->sma_nbytes);
+               /* SMA bytes allocated */
+               varnish_submit_derive (conf->instance,  "sma", "total_bytes", "allocated", stats->sma_balloc);
+               /* SMA bytes free */
+               varnish_submit_derive (conf->instance,  "sma", "total_bytes", "free" ,     stats->sma_bfree);
+       }
+#endif
+
+       if (conf->collect_sms)
+       {
+               /* SMS allocator requests */
+               varnish_submit_derive (conf->instance, "sms", "total_requests", "allocator", stats->sms_nreq);
+               /* SMS outstanding allocations */
+               varnish_submit_gauge (conf->instance,  "sms", "requests", "outstanding",     stats->sms_nobj);
+               /* SMS outstanding bytes */
+               varnish_submit_gauge (conf->instance,  "sms", "bytes", "outstanding",        stats->sms_nbytes);
+               /* SMS bytes allocated */
+               varnish_submit_derive (conf->instance,  "sms", "total_bytes", "allocated",   stats->sms_balloc);
+               /* SMS bytes freed */
+               varnish_submit_derive (conf->instance,  "sms", "total_bytes", "free",        stats->sms_bfree);
+       }
+
+       if (conf->collect_struct)
+       {
+               /* N struct sess_mem       */
+               varnish_submit_gauge (conf->instance, "struct", "current_sessions", "sess_mem",  stats->n_sess_mem);
+               /* N struct sess           */
+               varnish_submit_gauge (conf->instance, "struct", "current_sessions", "sess",      stats->n_sess);
+               /* N struct object         */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "object",             stats->n_object);
+               /* N unresurrected objects */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "vampireobject",      stats->n_vampireobject);
+               /* N struct objectcore     */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "objectcore",         stats->n_objectcore);
+               /* N struct objecthead     */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "objecthead",         stats->n_objecthead);
+#ifdef HAVE_VARNISH_V2
+               /* N struct smf            */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "smf",                stats->n_smf);
+               /* N small free smf         */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "smf_frag",           stats->n_smf_frag);
+               /* N large free smf         */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "smf_large",          stats->n_smf_large);
+               /* N struct vbe_conn        */
+               varnish_submit_gauge (conf->instance, "struct", "objects", "vbe_conn",           stats->n_vbe_conn);
+#endif
+       }
+
+       if (conf->collect_totals)
+       {
+               /* Total Sessions */
+               varnish_submit_derive (conf->instance, "totals", "total_sessions", "sessions",  stats->s_sess);
+               /* Total Requests */
+               varnish_submit_derive (conf->instance, "totals", "total_requests", "requests",  stats->s_req);
+               /* Total pipe */
+               varnish_submit_derive (conf->instance, "totals", "total_operations", "pipe",    stats->s_pipe);
+               /* Total pass */
+               varnish_submit_derive (conf->instance, "totals", "total_operations", "pass",    stats->s_pass);
+               /* Total fetch */
+               varnish_submit_derive (conf->instance, "totals", "total_operations", "fetches", stats->s_fetch);
+               /* Total header bytes */
+               varnish_submit_derive (conf->instance, "totals", "total_bytes", "header-bytes", stats->s_hdrbytes);
+               /* Total body byte */
+               varnish_submit_derive (conf->instance, "totals", "total_bytes", "body-bytes",   stats->s_bodybytes);
+       }
+
+       if (conf->collect_uptime)
+       {
+               /* Client uptime */
+               varnish_submit_gauge (conf->instance, "uptime", "uptime", "client_uptime", stats->uptime);
+       }
+
+       if (conf->collect_vcl)
+       {
+               /* N vcl total     */
+               varnish_submit_gauge (conf->instance, "vcl", "vcl", "total_vcl",     stats->n_vcl);
+               /* N vcl available */
+               varnish_submit_gauge (conf->instance, "vcl", "vcl", "avail_vcl",     stats->n_vcl_avail);
+               /* N vcl discarded */
+               varnish_submit_gauge (conf->instance, "vcl", "vcl", "discarded_vcl", stats->n_vcl_discard);
+       }
+
+       if (conf->collect_workers)
+       {
+               /* worker threads */
+               varnish_submit_gauge (conf->instance, "workers", "threads", "worker",             stats->n_wrk);
+               /* worker threads created */
+               varnish_submit_derive (conf->instance, "workers", "total_threads", "created",     stats->n_wrk_create);
+               /* worker threads not created */
+               varnish_submit_derive (conf->instance, "workers", "total_threads", "failed",      stats->n_wrk_failed);
+               /* worker threads limited */
+               varnish_submit_derive (conf->instance, "workers", "total_threads", "limited",     stats->n_wrk_max);
+               /* dropped work requests */
+               varnish_submit_derive (conf->instance, "workers", "total_requests", "dropped",    stats->n_wrk_drop);
+#ifdef HAVE_VARNISH_V2
+               /* queued work requests */
+               varnish_submit_derive (conf->instance, "workers", "total_requests", "queued",     stats->n_wrk_queue);
+               /* overflowed work requests */
+               varnish_submit_derive (conf->instance, "workers", "total_requests", "overflowed", stats->n_wrk_overflow);
+#else
+               /* queued work requests */
+               varnish_submit_derive (conf->instance, "workers", "total_requests", "queued",       stats->n_wrk_queued);
+               /* work request queue length */
+               varnish_submit_derive (conf->instance, "workers", "total_requests", "queue_length", stats->n_wrk_lqueue);
+#endif
+       }
+} /* }}} void varnish_monitor */
+
+#if HAVE_VARNISH_V3
+static int varnish_read (user_data_t *ud) /* {{{ */
 {
-       struct varnish_stats *VSL_stats;
-       const char *varnish_instance_name = NULL;
+       struct VSM_data *vd;
+       const c_varnish_stats_t *stats;
+
+       user_config_t *conf;
+
+       if ((ud == NULL) || (ud->data == NULL))
+               return (EINVAL);
+
+       conf = ud->data;
+
+       vd = VSM_New();
+       VSC_Setup(vd);
 
-       if ((VSL_stats = VSL_OpenStats(varnish_instance_name)) == NULL)
+       if (conf->instance != NULL)
        {
-               ERROR("Varnish plugin : unable to load statistics");
+               int status;
+
+               status = VSM_n_Arg (vd, conf->instance);
+               if (status < 0)
+               {
+                       ERROR ("varnish plugin: VSM_n_Arg (\"%s\") failed "
+                                       "with status %i.",
+                                       conf->instance, status);
+                       return (-1);
+               }
+       }
+
+       if (VSC_Open (vd, /* diag = */ 1))
+       {
+               ERROR ("varnish plugin: Unable to load statistics.");
 
                return (-1);
        }
 
-       varnish_monitor(VSL_stats);
+       stats = VSC_Main(vd);
 
-    return (0);
+       varnish_monitor (conf, stats);
+       VSM_Close (vd);
+
+       return (0);
 } /* }}} */
+#else /* if HAVE_VARNISH_V2 */
+static int varnish_read (user_data_t *ud) /* {{{ */
+{
+       const c_varnish_stats_t *stats;
+
+       user_config_t *conf;
+
+       if ((ud == NULL) || (ud->data == NULL))
+               return (EINVAL);
+
+       conf = ud->data;
+
+       stats = VSL_OpenStats (conf->instance);
+       if (stats == NULL)
+       {
+               ERROR ("Varnish plugin : unable to load statistics");
+
+               return (-1);
+       }
+
+       varnish_monitor (conf, stats);
+
+       return (0);
+} /* }}} */
+#endif
+
+static void varnish_config_free (void *ptr) /* {{{ */
+{
+       user_config_t *conf = ptr;
+
+       if (conf == NULL)
+               return;
+
+       sfree (conf->instance);
+       sfree (conf);
+} /* }}} */
+
+static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
+{
+       if (conf == NULL)
+               return (EINVAL);
+
+       conf->collect_backend     = 1;
+       conf->collect_cache       = 1;
+       conf->collect_connections = 1;
+#ifdef HAVE_VARNISH_V3
+       conf->collect_dirdns      = 0;
+#endif
+       conf->collect_esi         = 0;
+       conf->collect_fetch       = 0;
+       conf->collect_hcb         = 0;
+       conf->collect_objects     = 0;
+#if HAVE_VARNISH_V2
+       conf->collect_purge       = 0;
+#else
+       conf->collect_ban         = 0;
+#endif
+       conf->collect_session     = 0;
+       conf->collect_shm         = 1;
+#if HAVE_VARNISH_V2
+       conf->collect_sm          = 0;
+       conf->collect_sma         = 0;
+#endif
+       conf->collect_sms         = 0;
+       conf->collect_struct      = 0;
+       conf->collect_totals      = 0;
+       conf->collect_uptime      = 0;
+       conf->collect_vcl         = 0;
+       conf->collect_workers     = 0;
+
+       return (0);
+} /* }}} int varnish_config_apply_default */
+
+static int varnish_init (void) /* {{{ */
+{
+       user_config_t *conf;
+       user_data_t ud;
+
+       if (have_instance)
+               return (0);
+
+       conf = malloc (sizeof (*conf));
+       if (conf == NULL)
+               return (ENOMEM);
+       memset (conf, 0, sizeof (*conf));
+
+       /* Default settings: */
+       conf->instance = NULL;
+
+       varnish_config_apply_default (conf);
+
+       ud.data = conf;
+       ud.free_func = varnish_config_free;
+
+       plugin_register_complex_read (/* group = */ "varnish",
+                       /* name      = */ "varnish/localhost",
+                       /* callback  = */ varnish_read,
+                       /* interval  = */ NULL,
+                       /* user data = */ &ud);
+
+       return (0);
+} /* }}} int varnish_init */
+
+static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
+{
+       user_config_t *conf;
+       user_data_t ud;
+       char callback_name[DATA_MAX_NAME_LEN];
+       int i;
+
+       conf = malloc (sizeof (*conf));
+       if (conf == NULL)
+               return (ENOMEM);
+       memset (conf, 0, sizeof (*conf));
+       conf->instance = NULL;
+
+       varnish_config_apply_default (conf);
+
+       if (ci->values_num == 1)
+       {
+               int status;
+
+               status = cf_util_get_string (ci, &conf->instance);
+               if (status != 0)
+               {
+                       sfree (conf);
+                       return (status);
+               }
+               assert (conf->instance != NULL);
+
+               if (strcmp ("localhost", conf->instance) == 0)
+               {
+                       sfree (conf->instance);
+                       conf->instance = NULL;
+               }
+       }
+       else if (ci->values_num > 1)
+       {
+               WARNING ("Varnish plugin: \"Instance\" blocks accept only "
+                               "one argument.");
+               return (EINVAL);
+       }
+
+       for (i = 0; i < ci->children_num; i++)
+       {
+               oconfig_item_t *child = ci->children + i;
+
+               if (strcasecmp ("CollectCache", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_cache);
+               else if (strcasecmp ("CollectConnections", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_connections);
+               else if (strcasecmp ("CollectESI", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_esi);
+#ifdef HAVE_VARNISH_V3
+               else if (strcasecmp ("CollectDirectorDNS", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_dirdns);
+#endif
+               else if (strcasecmp ("CollectBackend", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_backend);
+               else if (strcasecmp ("CollectFetch", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_fetch);
+               else if (strcasecmp ("CollectHCB", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_hcb);
+               else if (strcasecmp ("CollectObjects", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_objects);
+#if HAVE_VARNISH_V2
+               else if (strcasecmp ("CollectPurge", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_purge);
+#else
+               else if (strcasecmp ("CollectBan", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_ban);
+#endif
+               else if (strcasecmp ("CollectSession", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_session);
+               else if (strcasecmp ("CollectSHM", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_shm);
+               else if (strcasecmp ("CollectSMS", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_sms);
+#if HAVE_VARNISH_V2
+               else if (strcasecmp ("CollectSMA", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_sma);
+               else if (strcasecmp ("CollectSM", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_sm);
+#endif
+               else if (strcasecmp ("CollectStruct", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_struct);
+               else if (strcasecmp ("CollectTotals", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_totals);
+               else if (strcasecmp ("CollectUptime", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_uptime);
+               else if (strcasecmp ("CollectVCL", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_vcl);
+               else if (strcasecmp ("CollectWorkers", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_workers);
+               else
+               {
+                       WARNING ("Varnish plugin: Ignoring unknown "
+                                       "configuration option: \"%s\"",
+                                       child->key);
+               }
+       }
+
+       if (!conf->collect_cache
+                       && !conf->collect_connections
+                       && !conf->collect_esi
+                       && !conf->collect_backend
+#ifdef HAVE_VARNISH_V3
+                       && !conf->collect_dirdns
+#endif
+                       && !conf->collect_fetch
+                       && !conf->collect_hcb
+                       && !conf->collect_objects
+#if HAVE_VARNISH_V2
+                       && !conf->collect_purge
+#else
+                       && !conf->collect_ban
+#endif
+                       && !conf->collect_session
+                       && !conf->collect_shm
+                       && !conf->collect_sms
+#if HAVE_VARNISH_V2
+                       && !conf->collect_sma
+                       && !conf->collect_sm
+#endif
+                       && !conf->collect_struct
+                       && !conf->collect_totals
+                       && !conf->collect_uptime
+                       && !conf->collect_vcl
+                       && !conf->collect_workers)
+       {
+               WARNING ("Varnish plugin: No metric has been configured for "
+                               "instance \"%s\". Disabling this instance.",
+                               (conf->instance == NULL) ? "localhost" : conf->instance);
+               return (EINVAL);
+       }
+
+       ssnprintf (callback_name, sizeof (callback_name), "varnish/%s",
+                       (conf->instance == NULL) ? "localhost" : conf->instance);
+
+       ud.data = conf;
+       ud.free_func = varnish_config_free;
+
+       plugin_register_complex_read (/* group = */ "varnish",
+                       /* name      = */ callback_name,
+                       /* callback  = */ varnish_read,
+                       /* interval  = */ NULL,
+                       /* user data = */ &ud);
+
+       have_instance = 1;
+
+       return (0);
+} /* }}} int varnish_config_instance */
+
+static int varnish_config (oconfig_item_t *ci) /* {{{ */
+{
+       int i;
+
+       for (i = 0; i < ci->children_num; i++)
+       {
+               oconfig_item_t *child = ci->children + i;
+
+               if (strcasecmp ("Instance", child->key) == 0)
+                       varnish_config_instance (child);
+               else
+               {
+                       WARNING ("Varnish plugin: Ignoring unknown "
+                                       "configuration option: \"%s\"",
+                                       child->key);
+               }
+       }
+
+       return (0);
+} /* }}} int varnish_config */
 
 void module_register (void) /* {{{ */
 {
-       plugin_register_config("varnish", varnish_config, config_keys, config_keys_num);
-       plugin_register_read("varnish", varnish_read);
+       plugin_register_complex_config ("varnish", varnish_config);
+       plugin_register_init ("varnish", varnish_init);
 } /* }}} */
 
 /* vim: set sw=8 noet fdm=marker : */