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}
  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 };
  39
  40 typedef struct user_config_s user_config_t; /* }}} */
  41
  42 /* {{{ Configuration directives */
  43 static user_config_t user_config = USER_CONFIG_INIT;
  44
  45 static const char *config_keys[] =
  46 {
  47   "MonitorCache",
  48   "MonitorConnections",
  49   "MonitorESI",
  50   "MonitorBackend",
  51   "MonitorFetch"
  52 };
  53
  54 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys); /* }}} */
  55
  56 static int varnish_config(const char *key, const char *value) /* {{{ */
  57 {
  58         SET_MONITOR_FLAG("MonitorCache", monitor_cache, value);
  59         SET_MONITOR_FLAG("MonitorConnections", monitor_connections, value);
  60         SET_MONITOR_FLAG("MonitorESI", monitor_esi, value);
  61         SET_MONITOR_FLAG("MonitorBackend", monitor_backend, value);
  62         SET_MONITOR_FLAG("MonitorFetch", monitor_fetch, value);
  63
  64         return (0);
  65 } /* }}} */
  66
  67 static void varnish_submit(const char *type, const char *type_instance, gauge_t value) /* {{{ */
  68 {
  69         value_t values[1];
  70         value_list_t vl = VALUE_LIST_INIT;
  71
  72         values[0].gauge = value;
  73         vl.values_len = 1;
  74         vl.values = values;
  75
  76         sstrncpy(vl.host         , hostname_g   , sizeof(vl.host));
  77         sstrncpy(vl.plugin       , "varnish"    , sizeof(vl.plugin));
  78         sstrncpy(vl.type         , type         , sizeof(vl.type));
  79         sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
  80
  81         plugin_dispatch_values(&vl);
  82 } /* }}} */
  83
  84 static void varnish_monitor(struct varnish_stats *VSL_stats) /* {{{ */
  85 {
  86         if(user_config.monitor_cache == 1)
  87         {
  88                 varnish_submit("varnish_cache_ratio", "cache_hit"    , VSL_stats->cache_hit);     /* Cache hits          */
  89                 varnish_submit("varnish_cache_ratio", "cache_miss"   , VSL_stats->cache_miss);    /* Cache misses        */
  90                 varnish_submit("varnish_cache_ratio", "cache_hitpass", VSL_stats->cache_hitpass); /* Cache hits for pass */
  91         }
  92
  93         if(user_config.monitor_connections == 1)
  94         {
  95                 varnish_submit("varnish_connections", "client_connections-accepted", VSL_stats->client_conn); /* Client connections accepted */
  96                 varnish_submit("varnish_connections", "client_connections-dropped" , VSL_stats->client_drop); /* Connection dropped, no sess */
  97                 varnish_submit("varnish_connections", "client_connections-received", VSL_stats->client_req);  /* Client requests received    */
  98         }
  99
 100         if(user_config.monitor_esi == 1)
 101         {
 102                 varnish_submit("varnish_esi", "esi_parsed", VSL_stats->esi_parse);  /* Objects ESI parsed (unlock) */
 103                 varnish_submit("varnish_esi", "esi_errors", VSL_stats->esi_errors); /* ESI parse errors (unlock)   */
 104         }
 105
 106         if(user_config.monitor_backend == 1)
 107         {
 108                 varnish_submit("varnish_backend_connections", "backend_connections-success"      , VSL_stats->backend_conn);      /* Backend conn. success       */
 109                 varnish_submit("varnish_backend_connections", "backend_connections-not-attempted", VSL_stats->backend_unhealthy); /* Backend conn. not attempted */
 110                 varnish_submit("varnish_backend_connections", "backend_connections-too-many"     , VSL_stats->backend_busy);      /* Backend conn. too many      */
 111                 varnish_submit("varnish_backend_connections", "backend_connections-failures"     , VSL_stats->backend_fail);      /* Backend conn. failures      */
 112                 varnish_submit("varnish_backend_connections", "backend_connections-reuses"       , VSL_stats->backend_reuse);     /* Backend conn. reuses        */
 113                 varnish_submit("varnish_backend_connections", "backend_connections-was-closed"   , VSL_stats->backend_toolate);   /* Backend conn. was closed    */
 114                 varnish_submit("varnish_backend_connections", "backend_connections-recycles"     , VSL_stats->backend_recycle);   /* Backend conn. recycles      */
 115                 varnish_submit("varnish_backend_connections", "backend_connections-unused"       , VSL_stats->backend_unused);    /* Backend conn. unused        */
 116         }
 117
 118         if(user_config.monitor_fetch == 1)
 119         {
 120                 varnish_submit("varnish_fetch", "fetch_head"       , VSL_stats->fetch_head);    /* Fetch head                */
 121                 varnish_submit("varnish_fetch", "fetch_length"     , VSL_stats->fetch_length);  /* Fetch with length         */
 122                 varnish_submit("varnish_fetch", "fetch_chunked"    , VSL_stats->fetch_chunked); /* Fetch chunked             */
 123                 varnish_submit("varnish_fetch", "fetch_eof"        , VSL_stats->fetch_eof);     /* Fetch EOF                 */
 124                 varnish_submit("varnish_fetch", "fetch_bad-headers", VSL_stats->fetch_bad);     /* Fetch bad headers         */
 125                 varnish_submit("varnish_fetch", "fetch_close"      , VSL_stats->fetch_close);   /* Fetch wanted close        */
 126                 varnish_submit("varnish_fetch", "fetch_oldhttp"    , VSL_stats->fetch_oldhttp); /* Fetch pre HTTP/1.1 closed */
 127                 varnish_submit("varnish_fetch", "fetch_zero"       , VSL_stats->fetch_zero);    /* Fetch zero len            */
 128                 varnish_submit("varnish_fetch", "fetch_failed"     , VSL_stats->fetch_failed);  /* Fetch failed              */
 129         }
 130 } /* }}} */
 131
 132 static int varnish_read(void) /* {{{ */
 133 {
 134         struct varnish_stats *VSL_stats;
 135         const char *varnish_instance_name = NULL;
 136
 137         if ((VSL_stats = VSL_OpenStats(varnish_instance_name)) == NULL)
 138         {
 139                 ERROR("Varnish plugin : unable to load statistics");
 140
 141                 return (-1);
 142         }
 143
 144         varnish_monitor(VSL_stats);
 145
 146     return (0);
 147 } /* }}} */
 148
 149 void module_register (void) /* {{{ */
 150 {
 151         plugin_register_config("varnish", varnish_config, config_keys, config_keys_num);
 152         plugin_register_read("varnish", varnish_read);
 153 } /* }}} */
 154
 155 /* vim: set sw=8 noet fdm=marker : */