Давно я уже не писал, работы в последнее время стало многовато. В основном текущие задачи в Drupal Coder, но и просто читатели блога обращаются по вопросам настройки и оптимизации серверов.
Сегодня напишу небольшой пост по вопросу как мониторить Varnish с помощью системы мониторинга zabbix.
Для настройки мониторинга необходимо:
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в конфигурационный файл zabbix агента, расположенного обычно в /etc/zabbix/zabbix_agentd.conf внести следующую запись:
UserParameter=varnish.stat[*],(test -f /usr/bin/varnishstat && varnishstat -1 -f $1 | awk '{print $$2}')Параметр * позволяет нам выводить все поля, которые доступны для команды varnishstat, а именно:
Field name Description ---------- ----------- client_conn Client connections accepted client_drop Connection dropped, no sess/wrk client_req Client requests received cache_hit Cache hits cache_hitpass Cache hits for pass cache_miss Cache misses backend_conn Backend conn. success backend_unhealthy Backend conn. not attempted backend_busy Backend conn. too many backend_fail Backend conn. failures backend_reuse Backend conn. reuses backend_toolate Backend conn. was closed backend_recycle Backend conn. recycles backend_unused Backend conn. unused fetch_head Fetch head fetch_length Fetch with Length fetch_chunked Fetch chunked fetch_eof Fetch EOF fetch_bad Fetch had bad headers fetch_close Fetch wanted close fetch_oldhttp Fetch pre HTTP/1.1 closed fetch_zero Fetch zero len fetch_failed Fetch failed n_sess_mem N struct sess_mem n_sess N struct sess n_object N struct object n_vampireobject N unresurrected objects n_objectcore N struct objectcore n_objecthead N struct objecthead n_smf N struct smf n_smf_frag N small free smf n_smf_large N large free smf n_vbe_conn N struct vbe_conn n_wrk N worker threads n_wrk_create N worker threads created n_wrk_failed N worker threads not created n_wrk_max N worker threads limited n_wrk_queue N queued work requests n_wrk_overflow N overflowed work requests n_wrk_drop N dropped work requests n_backend N backends n_expired N expired objects n_lru_nuked N LRU nuked objects n_lru_saved N LRU saved objects n_lru_moved N LRU moved objects n_deathrow N objects on deathrow losthdr HTTP header overflows n_objsendfile Objects sent with sendfile n_objwrite Objects sent with write n_objoverflow Objects overflowing workspace s_sess Total Sessions s_req Total Requests s_pipe Total pipe s_pass Total pass s_fetch Total fetch s_hdrbytes Total header bytes s_bodybytes Total body bytes sess_closed Session Closed sess_pipeline Session Pipeline sess_readahead Session Read Ahead sess_linger Session Linger sess_herd Session herd shm_records SHM records shm_writes SHM writes shm_flushes SHM flushes due to overflow shm_cont SHM MTX contention shm_cycles SHM cycles through buffer sm_nreq allocator requests sm_nobj outstanding allocations sm_balloc bytes allocated sm_bfree bytes free sma_nreq SMA allocator requests sma_nobj SMA outstanding allocations sma_nbytes SMA outstanding bytes sma_balloc SMA bytes allocated sma_bfree SMA bytes free sms_nreq SMS allocator requests sms_nobj SMS outstanding allocations sms_nbytes SMS outstanding bytes sms_balloc SMS bytes allocated sms_bfree SMS bytes freed backend_req Backend requests made n_vcl N vcl total n_vcl_avail N vcl available n_vcl_discard N vcl discarded n_purge N total active purges n_purge_add N new purges added n_purge_retire N old purges deleted n_purge_obj_test N objects tested n_purge_re_test N regexps tested against n_purge_dups N duplicate purges removed hcb_nolock HCB Lookups without lock hcb_lock HCB Lookups with lock hcb_insert HCB Inserts esi_parse Objects ESI parsed (unlock) esi_errors ESI parse errors (unlock) accept_fail Accept failures client_drop_late Connection dropped late uptime Client uptime
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На zabbix сервер создать элемент данных и в качестве ключа задать varnish.stat[имя_параметра из varnish stat], например
varnish.stat[cache_hit] - позволяет мониторить количество успешной загрузки из кэша.