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}
  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 };
  38
  39 typedef struct user_config_s user_config_t; /* }}} */
  40
  41 /* {{{ Configuration directives */
  42 static user_config_t user_config = USER_CONFIG_INIT;
  43
  44 static const char *config_keys[] =
  45 {
  46   "MonitorCache",
  47   "MonitorConnections",
  48   "MonitorESI",
  49   "MonitorBackend",
  50 };
  51
  52 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys); /* }}} */
  53
  54 static int varnish_config(const char *key, const char *value) /* {{{ */
  55 {
  56         SET_MONITOR_FLAG("MonitorCache", monitor_cache, value);
  57         SET_MONITOR_FLAG("MonitorConnections", monitor_connections, value);
  58         SET_MONITOR_FLAG("MonitorESI", monitor_esi, value);
  59         SET_MONITOR_FLAG("MonitorBackend", monitor_backend, value);
  60
  61         return (0);
  62 } /* }}} */
  63
  64 static void varnish_submit(const char *type, const char *type_instance, gauge_t value) /* {{{ */
  65 {
  66         value_t values[1];
  67         value_list_t vl = VALUE_LIST_INIT;
  68
  69         values[0].gauge = value;
  70         vl.values_len = 1;
  71         vl.values = values;
  72
  73         sstrncpy(vl.host         , hostname_g   , sizeof(vl.host));
  74         sstrncpy(vl.plugin       , "varnish"    , sizeof(vl.plugin));
  75         sstrncpy(vl.type         , type         , sizeof(vl.type));
  76         sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
  77
  78         plugin_dispatch_values(&vl);
  79 } /* }}} */
  80
  81 static void varnish_monitor(struct varnish_stats *VSL_stats) /* {{{ */
  82 {
  83         if(user_config.monitor_cache == 1)
  84         {
  85                 varnish_submit("varnish_cache_ratio", "cache_hit"    , VSL_stats->cache_hit);
  86                 varnish_submit("varnish_cache_ratio", "cache_miss"   , VSL_stats->cache_miss);
  87                 varnish_submit("varnish_cache_ratio", "cache_hitpass", VSL_stats->cache_hitpass);
  88         }
  89
  90         if(user_config.monitor_connections == 1)
  91         {
  92                 varnish_submit("varnish_connections", "client_connections-accepted", VSL_stats->client_conn);
  93                 varnish_submit("varnish_connections", "client_connections-dropped" , VSL_stats->client_drop);
  94                 varnish_submit("varnish_connections", "client_connections-received", VSL_stats->client_req);
  95         }
  96
  97         if(user_config.monitor_esi == 1)
  98         {
  99                 varnish_submit("varnish_esi", "esi_parsed", VSL_stats->esi_parse);
 100                 varnish_submit("varnish_esi", "esi_errors", VSL_stats->esi_errors);
 101         }
 102
 103         if(user_config.monitor_backend == 1)
 104         {
 105                 varnish_submit("varnish_backend_connections", "backend_connections-success"      , VSL_stats->backend_conn);      /* Backend conn. success       */
 106                 varnish_submit("varnish_backend_connections", "backend_connections-not-attempted", VSL_stats->backend_unhealthy); /* Backend conn. not attempted */
 107                 varnish_submit("varnish_backend_connections", "backend_connections-too-many"     , VSL_stats->backend_busy);      /* Backend conn. too many      */
 108                 varnish_submit("varnish_backend_connections", "backend_connections-failures"     , VSL_stats->backend_fail);      /* Backend conn. failures      */
 109                 varnish_submit("varnish_backend_connections", "backend_connections-reuses"       , VSL_stats->backend_reuse);     /* Backend conn. reuses        */
 110                 varnish_submit("varnish_backend_connections", "backend_connections-was-closed"   , VSL_stats->backend_toolate);   /* Backend conn. was closed    */
 111                 varnish_submit("varnish_backend_connections", "backend_connections-recycles"     , VSL_stats->backend_recycle);   /* Backend conn. recycles      */
 112                 varnish_submit("varnish_backend_connections", "backend_connections-unused"       , VSL_stats->backend_unused);    /* Backend conn. unused        */
 113         }
 114 } /* }}} */
 115
 116 static int varnish_read(void) /* {{{ */
 117 {
 118         struct varnish_stats *VSL_stats;
 119         const char *varnish_instance_name = NULL;
 120
 121         if ((VSL_stats = VSL_OpenStats(varnish_instance_name)) == NULL)
 122         {
 123                 ERROR("Varnish plugin : unable to load statistics");
 124
 125                 return (-1);
 126         }
 127
 128         varnish_monitor(VSL_stats);
 129
 130     return (0);
 131 } /* }}} */
 132
 133 void module_register (void) /* {{{ */
 134 {
 135         plugin_register_config("varnish", varnish_config, config_keys, config_keys_num);
 136         plugin_register_read("varnish", varnish_read);
 137 } /* }}} */
 138
 139 /* vim: set sw=8 noet fdm=marker : */