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 /**
  23  * Current list of what is monitored and what is not monitored (yet)
  24  *
  25  * Field name           Description                           Monitored
  26  * ----------           -----------                           ---------
  27  * uptime               Child uptime                              N
  28  * client_conn          Client connections accepted               Y
  29  * client_drop          Connection dropped, no sess               Y
  30  * client_req           Client requests received                  Y
  31  * cache_hit            Cache hits                                Y
  32  * cache_hitpass        Cache hits for pass                       Y
  33  * cache_miss           Cache misses                              Y
  34  * backend_conn         Backend conn. success                     Y
  35  * backend_unhealthy    Backend conn. not attempted               Y
  36  * backend_busy         Backend conn. too many                    Y
  37  * backend_fail         Backend conn. failures                    Y
  38  * backend_reuse        Backend conn. reuses                      Y
  39  * backend_toolate      Backend conn. was closed                  Y
  40  * backend_recycle      Backend conn. recycles                    Y
  41  * backend_unused       Backend conn. unused                      Y
  42  * fetch_head           Fetch head                                Y
  43  * fetch_length         Fetch with Length                         Y
  44  * fetch_chunked        Fetch chunked                             Y
  45  * fetch_eof            Fetch EOF                                 Y
  46  * fetch_bad            Fetch had bad headers                     Y
  47  * fetch_close          Fetch wanted close                        Y
  48  * fetch_oldhttp        Fetch pre HTTP/1.1 closed                 Y
  49  * fetch_zero           Fetch zero len                            Y
  50  * fetch_failed         Fetch failed                              Y
  51  * n_sess_mem           N struct sess_mem                         N
  52  * n_sess               N struct sess                             N
  53  * n_object             N struct object                           N
  54  * n_vampireobject      N unresurrected objects                   N
  55  * n_objectcore         N struct objectcore                       N
  56  * n_objecthead         N struct objecthead                       N
  57  * n_smf                N struct smf                              N
  58  * n_smf_frag           N small free smf                          N
  59  * n_smf_large          N large free smf                          N
  60  * n_vbe_conn           N struct vbe_conn                         N
  61  * n_wrk                N worker threads                          N
  62  * n_wrk_create         N worker threads created                  N
  63  * n_wrk_failed         N worker threads not created              N
  64  * n_wrk_max            N worker threads limited                  N
  65  * n_wrk_queue          N queued work requests                    N
  66  * n_wrk_overflow       N overflowed work requests                N
  67  * n_wrk_drop           N dropped work requests                   N
  68  * n_backend            N backends                                N
  69  * n_expired            N expired objects                         N
  70  * n_lru_nuked          N LRU nuked objects                       N
  71  * n_lru_saved          N LRU saved objects                       N
  72  * n_lru_moved          N LRU moved objects                       N
  73  * n_deathrow           N objects on deathrow                     N
  74  * losthdr              HTTP header overflows                     N
  75  * n_objsendfile        Objects sent with sendfile                N
  76  * n_objwrite           Objects sent with write                   N
  77  * n_objoverflow        Objects overflowing workspace             N
  78  * s_sess               Total Sessions                            N
  79  * s_req                Total Requests                            N
  80  * s_pipe               Total pipe                                N
  81  * s_pass               Total pass                                N
  82  * s_fetch              Total fetch                               N
  83  * s_hdrbytes           Total header bytes                        N
  84  * s_bodybytes          Total body bytes                          N
  85  * sess_closed          Session Closed                            N
  86  * sess_pipeline        Session Pipeline                          N
  87  * sess_readahead       Session Read Ahead                        N
  88  * sess_linger          Session Linger                            N
  89  * sess_herd            Session herd                              N
  90  * shm_records          SHM records                               N
  91  * shm_writes           SHM writes                                N
  92  * shm_flushes          SHM flushes due to overflow               N
  93  * shm_cont             SHM MTX contention                        N
  94  * shm_cycles           SHM cycles through buffer                 N
  95  * sm_nreq              allocator requests                        N
  96  * sm_nobj              outstanding allocations                   N
  97  * sm_balloc            bytes allocated                           N
  98  * sm_bfree             bytes free                                N
  99  * sma_nreq             SMA allocator requests                    N
 100  * sma_nobj             SMA outstanding allocations               N
 101  * sma_nbytes           SMA outstanding bytes                     N
 102  * sma_balloc           SMA bytes allocated                       N
 103  * sma_bfree            SMA bytes free                            N
 104  * sms_nreq             SMS allocator requests                    N
 105  * sms_nobj             SMS outstanding allocations               N
 106  * sms_nbytes           SMS outstanding bytes                     N
 107  * sms_balloc           SMS bytes allocated                       N
 108  * sms_bfree            SMS bytes freed                           N
 109  * backend_req          Backend requests made                     N
 110  * n_vcl                N vcl total                               N
 111  * n_vcl_avail          N vcl available                           N
 112  * n_vcl_discard        N vcl discarded                           N
 113  * n_purge              N total active purges                     N
 114  * n_purge_add          N new purges added                        N
 115  * n_purge_retire       N old purges deleted                      N
 116  * n_purge_obj_test     N objects tested                          N
 117  * n_purge_re_test      N regexps tested against                  N
 118  * n_purge_dups         N duplicate purges removed                N
 119  * hcb_nolock           HCB Lookups without lock                  Y
 120  * hcb_lock             HCB Lookups with lock                     Y
 121  * hcb_insert           HCB Inserts                               Y
 122  * esi_parse            Objects ESI parsed (unlock)               Y
 123  * esi_errors           ESI parse errors (unlock)                 Y
 124  */
 125 #include "collectd.h"
 126 #include "common.h"
 127 #include "plugin.h"
 128
 129 #include <varnish/varnishapi.h>
 130
 131 #define USER_CONFIG_INIT {0, 0, 0, 0, 0,0}
 132 #define SET_MONITOR_FLAG(name, flag, value) if((strcasecmp(name, key) == 0) && IS_TRUE(value)) user_config.flag = 1
 133
 134 /* {{{ user_config_s */
 135 struct user_config_s {
 136         int monitor_cache;
 137         int monitor_connections;
 138         int monitor_esi;
 139         int monitor_backend;
 140         int monitor_fetch;
 141         int monitor_hcb;
 142 };
 143
 144 typedef struct user_config_s user_config_t; /* }}} */
 145
 146 /* {{{ Configuration directives */
 147 static user_config_t user_config = USER_CONFIG_INIT;
 148
 149 static const char *config_keys[] =
 150 {
 151   "MonitorCache",
 152   "MonitorConnections",
 153   "MonitorESI",
 154   "MonitorBackend",
 155   "MonitorFetch",
 156   "MonitorHCB"
 157 };
 158
 159 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys); /* }}} */
 160
 161 static int varnish_config(const char *key, const char *value) /* {{{ */
 162 {
 163         SET_MONITOR_FLAG("MonitorCache", monitor_cache, value);
 164         SET_MONITOR_FLAG("MonitorConnections", monitor_connections, value);
 165         SET_MONITOR_FLAG("MonitorESI", monitor_esi, value);
 166         SET_MONITOR_FLAG("MonitorBackend", monitor_backend, value);
 167         SET_MONITOR_FLAG("MonitorFetch", monitor_fetch, value);
 168         SET_MONITOR_FLAG("MonitorHCB", monitor_hcb, value);
 169
 170         return (0);
 171 } /* }}} */
 172
 173 static void varnish_submit(const char *type, const char *type_instance, gauge_t value) /* {{{ */
 174 {
 175         value_t values[1];
 176         value_list_t vl = VALUE_LIST_INIT;
 177
 178         values[0].gauge = value;
 179         vl.values_len = 1;
 180         vl.values = values;
 181
 182         sstrncpy(vl.host         , hostname_g   , sizeof(vl.host));
 183         sstrncpy(vl.plugin       , "varnish"    , sizeof(vl.plugin));
 184         sstrncpy(vl.type         , type         , sizeof(vl.type));
 185         sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
 186
 187         plugin_dispatch_values(&vl);
 188 } /* }}} */
 189
 190 static void varnish_monitor(struct varnish_stats *VSL_stats) /* {{{ */
 191 {
 192         if(user_config.monitor_cache == 1)
 193         {
 194                 varnish_submit("varnish_cache_ratio", "cache_hit"    , VSL_stats->cache_hit);     /* Cache hits          */
 195                 varnish_submit("varnish_cache_ratio", "cache_miss"   , VSL_stats->cache_miss);    /* Cache misses        */
 196                 varnish_submit("varnish_cache_ratio", "cache_hitpass", VSL_stats->cache_hitpass); /* Cache hits for pass */
 197         }
 198
 199         if(user_config.monitor_connections == 1)
 200         {
 201                 varnish_submit("varnish_connections", "client_connections-accepted", VSL_stats->client_conn); /* Client connections accepted */
 202                 varnish_submit("varnish_connections", "client_connections-dropped" , VSL_stats->client_drop); /* Connection dropped, no sess */
 203                 varnish_submit("varnish_connections", "client_connections-received", VSL_stats->client_req);  /* Client requests received    */
 204         }
 205
 206         if(user_config.monitor_esi == 1)
 207         {
 208                 varnish_submit("varnish_esi", "esi_parsed", VSL_stats->esi_parse);  /* Objects ESI parsed (unlock) */
 209                 varnish_submit("varnish_esi", "esi_errors", VSL_stats->esi_errors); /* ESI parse errors (unlock)   */
 210         }
 211
 212         if(user_config.monitor_backend == 1)
 213         {
 214                 varnish_submit("varnish_backend_connections", "backend_connections-success"      , VSL_stats->backend_conn);      /* Backend conn. success       */
 215                 varnish_submit("varnish_backend_connections", "backend_connections-not-attempted", VSL_stats->backend_unhealthy); /* Backend conn. not attempted */
 216                 varnish_submit("varnish_backend_connections", "backend_connections-too-many"     , VSL_stats->backend_busy);      /* Backend conn. too many      */
 217                 varnish_submit("varnish_backend_connections", "backend_connections-failures"     , VSL_stats->backend_fail);      /* Backend conn. failures      */
 218                 varnish_submit("varnish_backend_connections", "backend_connections-reuses"       , VSL_stats->backend_reuse);     /* Backend conn. reuses        */
 219                 varnish_submit("varnish_backend_connections", "backend_connections-was-closed"   , VSL_stats->backend_toolate);   /* Backend conn. was closed    */
 220                 varnish_submit("varnish_backend_connections", "backend_connections-recycles"     , VSL_stats->backend_recycle);   /* Backend conn. recycles      */
 221                 varnish_submit("varnish_backend_connections", "backend_connections-unused"       , VSL_stats->backend_unused);    /* Backend conn. unused        */
 222         }
 223
 224         if(user_config.monitor_fetch == 1)
 225         {
 226                 varnish_submit("varnish_fetch", "fetch_head"       , VSL_stats->fetch_head);    /* Fetch head                */
 227                 varnish_submit("varnish_fetch", "fetch_length"     , VSL_stats->fetch_length);  /* Fetch with length         */
 228                 varnish_submit("varnish_fetch", "fetch_chunked"    , VSL_stats->fetch_chunked); /* Fetch chunked             */
 229                 varnish_submit("varnish_fetch", "fetch_eof"        , VSL_stats->fetch_eof);     /* Fetch EOF                 */
 230                 varnish_submit("varnish_fetch", "fetch_bad-headers", VSL_stats->fetch_bad);     /* Fetch bad headers         */
 231                 varnish_submit("varnish_fetch", "fetch_close"      , VSL_stats->fetch_close);   /* Fetch wanted close        */
 232                 varnish_submit("varnish_fetch", "fetch_oldhttp"    , VSL_stats->fetch_oldhttp); /* Fetch pre HTTP/1.1 closed */
 233                 varnish_submit("varnish_fetch", "fetch_zero"       , VSL_stats->fetch_zero);    /* Fetch zero len            */
 234                 varnish_submit("varnish_fetch", "fetch_failed"     , VSL_stats->fetch_failed);  /* Fetch failed              */
 235         }
 236
 237         if(user_config.monitor_hcb == 1)
 238         {
 239                 varnish_submit("varnish_hcb", "hcb_nolock", VSL_stats->hcb_nolock); /* HCB Lookups without lock */
 240                 varnish_submit("varnish_hcb", "hcb_lock"  , VSL_stats->hcb_lock);   /* HCB Lookups with lock    */
 241                 varnish_submit("varnish_hcb", "hcb_insert", VSL_stats->hcb_insert); /* HCB Inserts              */
 242         }
 243 } /* }}} */
 244
 245 static int varnish_read(void) /* {{{ */
 246 {
 247         struct varnish_stats *VSL_stats;
 248         const char *varnish_instance_name = NULL;
 249
 250         if ((VSL_stats = VSL_OpenStats(varnish_instance_name)) == NULL)
 251         {
 252                 ERROR("Varnish plugin : unable to load statistics");
 253
 254                 return (-1);
 255         }
 256
 257         varnish_monitor(VSL_stats);
 258
 259     return (0);
 260 } /* }}} */
 261
 262 void module_register (void) /* {{{ */
 263 {
 264         plugin_register_config("varnish", varnish_config, config_keys, config_keys_num);
 265         plugin_register_read("varnish", varnish_read);
 266 } /* }}} */
 267
 268 /* vim: set sw=8 noet fdm=marker : */