src/varnish.c

   1 /**
   2  * collectd - src/varnish.c
   3  * Copyright (C) 2010 Jerome Renard
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; only version 2 of the License is applicable.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  17  *
  18  * Authors:
  19  *   Jerome Renard <jerome.renard@gmail.com>
  20  **/
  21
  22 #include "collectd.h"
  23 #include "common.h"
  24 #include "plugin.h"
  25
  26 #include <varnish/varnishapi.h>
  27
  28 #define USER_CONFIG_INIT {0, 0, 0, 0, 0,0}
  29 #define SET_MONITOR_FLAG(name, flag, value) if((strcasecmp(name, key) == 0) && IS_TRUE(value)) user_config.flag = 1
  30
  31 /* {{{ user_config_s */
  32 struct user_config_s {
  33         int monitor_cache;
  34         int monitor_connections;
  35         int monitor_esi;
  36         int monitor_backend;
  37         int monitor_fetch;
  38         int monitor_hcb;
  39 };
  40
  41 typedef struct user_config_s user_config_t; /* }}} */
  42
  43 /* {{{ Configuration directives */
  44 static user_config_t user_config = USER_CONFIG_INIT;
  45
  46 static const char *config_keys[] =
  47 {
  48   "MonitorCache",
  49   "MonitorConnections",
  50   "MonitorESI",
  51   "MonitorBackend",
  52   "MonitorFetch",
  53   "MonitorHCB"
  54 };
  55
  56 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys); /* }}} */
  57
  58 static int varnish_config(const char *key, const char *value) /* {{{ */
  59 {
  60         SET_MONITOR_FLAG("MonitorCache", monitor_cache, value);
  61         SET_MONITOR_FLAG("MonitorConnections", monitor_connections, value);
  62         SET_MONITOR_FLAG("MonitorESI", monitor_esi, value);
  63         SET_MONITOR_FLAG("MonitorBackend", monitor_backend, value);
  64         SET_MONITOR_FLAG("MonitorFetch", monitor_fetch, value);
  65         SET_MONITOR_FLAG("MonitorHCB", monitor_hcb, value);
  66
  67         return (0);
  68 } /* }}} */
  69
  70 static void varnish_submit(const char *type, const char *type_instance, gauge_t value) /* {{{ */
  71 {
  72         value_t values[1];
  73         value_list_t vl = VALUE_LIST_INIT;
  74
  75         values[0].gauge = value;
  76         vl.values_len = 1;
  77         vl.values = values;
  78
  79         sstrncpy(vl.host         , hostname_g   , sizeof(vl.host));
  80         sstrncpy(vl.plugin       , "varnish"    , sizeof(vl.plugin));
  81         sstrncpy(vl.type         , type         , sizeof(vl.type));
  82         sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
  83
  84         plugin_dispatch_values(&vl);
  85 } /* }}} */
  86
  87 static void varnish_monitor(struct varnish_stats *VSL_stats) /* {{{ */
  88 {
  89         if(user_config.monitor_cache == 1)
  90         {
  91                 varnish_submit("varnish_cache_ratio", "cache_hit"    , VSL_stats->cache_hit);     /* Cache hits          */
  92                 varnish_submit("varnish_cache_ratio", "cache_miss"   , VSL_stats->cache_miss);    /* Cache misses        */
  93                 varnish_submit("varnish_cache_ratio", "cache_hitpass", VSL_stats->cache_hitpass); /* Cache hits for pass */
  94         }
  95
  96         if(user_config.monitor_connections == 1)
  97         {
  98                 varnish_submit("varnish_connections", "client_connections-accepted", VSL_stats->client_conn); /* Client connections accepted */
  99                 varnish_submit("varnish_connections", "client_connections-dropped" , VSL_stats->client_drop); /* Connection dropped, no sess */
 100                 varnish_submit("varnish_connections", "client_connections-received", VSL_stats->client_req);  /* Client requests received    */
 101         }
 102
 103         if(user_config.monitor_esi == 1)
 104         {
 105                 varnish_submit("varnish_esi", "esi_parsed", VSL_stats->esi_parse);  /* Objects ESI parsed (unlock) */
 106                 varnish_submit("varnish_esi", "esi_errors", VSL_stats->esi_errors); /* ESI parse errors (unlock)   */
 107         }
 108
 109         if(user_config.monitor_backend == 1)
 110         {
 111                 varnish_submit("varnish_backend_connections", "backend_connections-success"      , VSL_stats->backend_conn);      /* Backend conn. success       */
 112                 varnish_submit("varnish_backend_connections", "backend_connections-not-attempted", VSL_stats->backend_unhealthy); /* Backend conn. not attempted */
 113                 varnish_submit("varnish_backend_connections", "backend_connections-too-many"     , VSL_stats->backend_busy);      /* Backend conn. too many      */
 114                 varnish_submit("varnish_backend_connections", "backend_connections-failures"     , VSL_stats->backend_fail);      /* Backend conn. failures      */
 115                 varnish_submit("varnish_backend_connections", "backend_connections-reuses"       , VSL_stats->backend_reuse);     /* Backend conn. reuses        */
 116                 varnish_submit("varnish_backend_connections", "backend_connections-was-closed"   , VSL_stats->backend_toolate);   /* Backend conn. was closed    */
 117                 varnish_submit("varnish_backend_connections", "backend_connections-recycles"     , VSL_stats->backend_recycle);   /* Backend conn. recycles      */
 118                 varnish_submit("varnish_backend_connections", "backend_connections-unused"       , VSL_stats->backend_unused);    /* Backend conn. unused        */
 119         }
 120
 121         if(user_config.monitor_fetch == 1)
 122         {
 123                 varnish_submit("varnish_fetch", "fetch_head"       , VSL_stats->fetch_head);    /* Fetch head                */
 124                 varnish_submit("varnish_fetch", "fetch_length"     , VSL_stats->fetch_length);  /* Fetch with length         */
 125                 varnish_submit("varnish_fetch", "fetch_chunked"    , VSL_stats->fetch_chunked); /* Fetch chunked             */
 126                 varnish_submit("varnish_fetch", "fetch_eof"        , VSL_stats->fetch_eof);     /* Fetch EOF                 */
 127                 varnish_submit("varnish_fetch", "fetch_bad-headers", VSL_stats->fetch_bad);     /* Fetch bad headers         */
 128                 varnish_submit("varnish_fetch", "fetch_close"      , VSL_stats->fetch_close);   /* Fetch wanted close        */
 129                 varnish_submit("varnish_fetch", "fetch_oldhttp"    , VSL_stats->fetch_oldhttp); /* Fetch pre HTTP/1.1 closed */
 130                 varnish_submit("varnish_fetch", "fetch_zero"       , VSL_stats->fetch_zero);    /* Fetch zero len            */
 131                 varnish_submit("varnish_fetch", "fetch_failed"     , VSL_stats->fetch_failed);  /* Fetch failed              */
 132         }
 133
 134         if(user_config.monitor_hcb == 1)
 135         {
 136                 varnish_submit("varnish_hcb", "hcb_nolock", VSL_stats->hcb_nolock); /* HCB Lookups without lock */
 137                 varnish_submit("varnish_hcb", "hcb_lock"  , VSL_stats->hcb_lock);   /* HCB Lookups with lock    */
 138                 varnish_submit("varnish_hcb", "hcb_insert", VSL_stats->hcb_insert); /* HCB Inserts              */
 139         }
 140 } /* }}} */
 141
 142 static int varnish_read(void) /* {{{ */
 143 {
 144         struct varnish_stats *VSL_stats;
 145         const char *varnish_instance_name = NULL;
 146
 147         if ((VSL_stats = VSL_OpenStats(varnish_instance_name)) == NULL)
 148         {
 149                 ERROR("Varnish plugin : unable to load statistics");
 150
 151                 return (-1);
 152         }
 153
 154         varnish_monitor(VSL_stats);
 155
 156     return (0);
 157 } /* }}} */
 158
 159 void module_register (void) /* {{{ */
 160 {
 161         plugin_register_config("varnish", varnish_config, config_keys, config_keys_num);
 162         plugin_register_read("varnish", varnish_read);
 163 } /* }}} */
 164
 165 /* vim: set sw=8 noet fdm=marker : */