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Elasticsearchに入門してチューニングや監視をした話 #elasticsearchj...
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Manabu Matsuzaki
October 06, 2017
Technology
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Elasticsearchに入門してチューニングや監視をした話 #elasticsearchjp /elasticsearch-fukuoka-2017
Elasticsearch勉強会 in 福岡 2017の発表資料です
Manabu Matsuzaki
October 06, 2017
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Transcript
Elasticsearchʹೖͯ͠ νϡʔχϯάࢹΛͨ͠ Elasticsearchษڧձ in Ԭ 2017 2017/10/06 @matsumana
ࣗݾհ • ໊લɿ দ࡚ ֶ • ॴଐɿ LINE Fukuokaגࣜձࣾ •
Twitterɿ @matsumana
ΞδΣϯμ • ೖ͢Δ࣌ʹؾΛ͚ͭͨࣄ • ηοτΞοϓ • νϡʔχϯά • όοΫΞοϓͱϦΧόϦ •
ϞχλϦϯά • ·ͱΊ
લఏ • ͜ͷεϥΠυͷ༰Elastic stack 5.4ʙ5.6࣌ͷใͰ͢ • LogstashͱBeatsࠓͷͱ͜Ζ͏༧ఆͳ͠ FluentdΛ͍ͬͯΔ • X-PackແঈͰ͑ΔMonitoring͚͍ͩͬͯΔ
• αʔϏεͷࢹΛطʹPrometheusͰߦ͍ͬͯΔͷͰ elasticsearch_exporterΛಋೖͯ͠PrometheusͰࢹ͢Δ
લఏ • ࠓճElasticsearchΛಋೖͨ͠ϓϩδΣΫτͷϢʔεέʔεҎԼ • શจݕࡧ༻్Ͱ͍ͬͯΔ • indexing1ʹճɺόονʹΑΔbulk indexingͷΈ • Ϣʔβsearch͔͠ߦΘͳ͍
• ͦͷϓϩδΣΫτͷαʔόαΠυͷݴޠJava
ೖ͢Δ࣌ʹؾΛ͚ͭͨࣄ • ެࣜυΩϡϝϯτɺެࣜϒϩάΛಡΉ • άάͬͯग़͖ͯͨݸਓͷϒϩάͳͲग़དྷΔ͚ͩಡ·ͳ͍ ʢݹ͍όʔδϣϯΛݩʹॻ͔Εͨهࣄʹҙʣ • ࡉ͔͍ڍಈΛΓ͍ͨ࣌ιʔεΛಡΉ
ެࣜυΩϡϝϯτ ϘϦϡʔϜ͕ଟ͍ͷͰ ಛʹେࣄͦ͏ͳՕॴ͚ͩಡΜͩ https://matsumana.info/blog/2017/06/17/elasticsearch-getting-started-docs/ Ҏલϒϩάʹ·ͱΊ͍ͯ·͢
ηοτΞοϓ • ެࣜͷAnsible playbookͰηοτΞοϓ ʢࢼͨ͠ࣄͳ͍͚ͲɺPuppet൛ɺChef൛͋ΔΈ͍ͨʣ • ศརɻ͓͢͢Ί • 2017/10/03ݱࡏͩͱɺ5.5.1ͱ͍͏tagΛ͏ͷ͕ྑ͍
ެࣜplaybookͷॏཁͦ͏ͳม es_version es_instance_name es_heap_size es_config.cluster.name es_config.node.name → "${HOSTNAME}" ͕ྑ͍ es_config.discovery.zen.ping.unicast.hosts
es_config.node.master es_config.node.data es_config.bootstrap.memory_lock → true ͕ྑ͍ es_config.network.host → 0.0.0.0 es_jvm_custom_parameters → Ճ͍ͨ͠JVM OptionΛࢦఆ es_plugins → analysis-icuanalysis-kuromojiͳͲΛࢦఆՄೳ es_enable_xpack → X-PackΛ͏߹true es_xpack_features → monitoringͳͲΛΠϯετʔϧՄೳ https://github.com/elastic/ansible-elasticsearch/blob/master/README.md
༻͍ͯ͠Δόʔδϣϯ • CentOS 7.3 (ެࣜͷAnsible playbookCentOS 6Λαϙʔτ͍ͯ͠ͳ͍) • Oracle JDK
1.8.0 • Elastic stack 5.5.1 • Elasticsearch • Kibana (X-Pack MonitoringͷμογϡϘʔυΛݟΔͨΊʹಋೖ) • X-Pack Monitoring ※Slideͷ࠷ޙʹัଊ͋Γ (ӡ༻ʹཱͭใ͕͋Δ͔ݟͯΈ͔ͨͬͨͷͰಋೖ) • Cerebro 0.6.6
νϡʔχϯά ʢαʔόαΠυʣ
• APIͰಈతʹઃఆͰ͖Δύϥϝʔλͱग़དྷͳ͍ύϥϝʔλ͕͋Δ • ಈతʹมߋͰ͖ͳ͍߲elasticsearch.ymlʹॻ͘ ʢөʹElasticsearchͷ࠶ىಈ͕ඞཁʣ • ಈతʹมߋͰ͖Δ߲APIͰมߋ͢Δ ʢElasticsearchΛ࠶ىಈ͠ͳͯ͘ө͞ΕΔʣ • elasticsearch.ymlͱAPIͷ྆ํͰಉ߲͡Λมߋͨ͠߹ɺ
APIͰͷมߋ͕༏ઌ͞ΕΔ ҙ
ઃఆͨ͠ओͳύϥϝʔλ
• Cacheؔ࿈ • indices.fielddata.cache.size • indices.queries.cache.size • indices.requests.cache.size • Thread
poolؔ࿈ ※Slideͷ࠷ޙʹัଊ͋Γ • thread_pool.index.queue_size • thread_pool.bulk.queue_size elasticsearch.ymlͰߦ͏Ϋϥελશମͷઃఆ ʢಈతʹมߋͰ͖ͳ͍ʣ
• Circuit Breakerؔ࿈ • indices.breaker.total.limit • indices.breaker.fielddata.limit • indices.breaker.request.limit •
Segments and Mergingؔ࿈ ※Slideͷ࠷ޙʹัଊ͋Γ • indices.store.throttle.max_bytes_per_sec σϑΥϧτHDD͚ʹͳ͍ͬͯΔͷͰɺ SSDΛ͏߹มߋ͢ΔΑ͏ʹDefinitive Guideʹॻ͍ͯ͋Δ APIͰߦ͏Ϋϥελશମͷઃఆ ʢಈతʹมߋͰ͖Δʣ
• number_of_shards • number_of_replicas bulk indexingத0ʹઃఆɻऴΘͬͨΒ͢ • _allΛແޮԽ • dynamic:
strict • index.indexing.slowlogؔ࿈ • index.search.slowlogؔ࿈ APIͰߦ͏index/index templateຖͷઃఆ ʢಈతʹมߋͰ͖Δʣ
νϡʔχϯά ʢΫϥΠΞϯταΠυʣ
• ࠷ۙɺElasticsearchࣾREST Clientਪ͠ͳงғؾ • Transport ClientͱҧͬͯαʔόͱΫϥΠΞϯτϥΠϒϥϦͷ όʔδϣϯΛҰகͤ͞ͳͯ͘ྑ͍ • ύϑΥʔϚϯεTransport Clientͱಉ͘͡Β͍Β͍͠
• Elasticsearch 5.6ͰJava High Level REST Client ϦϦʔε͞Εͨ REST Client
• Transport ClientͰbulkॲཧ͢Δ߹ɺ BulkProcessorΛ͏ͱྑ͍ɻҎԼͷύϥϝʔλ͕ઃఆՄೳ • bulkActions • bulkSize • flushInterval
• concurrentRequests • backoffPolicy https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-docs-bulk-processor.html Transport Client
όοΫΞοϓͱϦΧόϦ • ࠓճͷϓϩδΣΫτͰɺݩͷσʔλશͯMySQLʹอଘ͞Ε͍ͯͯ ̍ʹճόονͰElasticsearchʹશ݅builk indexing͍ͯ͠Δ ElasticsearchͷόοΫΞοϓऔ͍ͬͯͳ͍ • ElasticsearchΫϥελશମ͕յΕΔͱ͍͏࠷ѱͷέʔεͷ߹ɺ ElasticsearchΫϥελΛAnsibleͰ࠶ߏஙͯ͠ɺ͍ͭͷఆظόονͰ શ݅builk
indexing͢Δఆ https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html
ϞχλϦϯά • ͍ͬͯΔPrometheus exporter • node_exporter • jmx_exporter • elasticsearch_exporter
• άάΔͱ͍͔ͭ͘ݟ͔ͭΔ͕ɺݱࡏ͍ͬͯΔͷ͜Ε https://github.com/justwatchcom/elasticsearch_exporter • authorͱcontributorୡ͕ඞཁͳϝτϦΫε͔͠export͞Εͯ ͍ͳ͍ͷͰɺ͕ࣗඞཁͳϝτϦΫε͕ແ͚ΕPR͠Α͏
• Load Avg • CPU༻ • Disk I/O • network
trafic node_exporterͰऩूͰ͖Δ OSʹؔ͢ΔϝτϦΫεͷҰྫ
• Heap༻ • GCճ • GCॴ༻࣌ؒ jmx_exporterͰऔಘͰ͖Δ JVMʹؔ͢ΔϝτϦΫεͷҰྫ
• cluster health • Document count(primary shardͷΈ) • Document size(primary
shardͷΈ) • Thread pool queue count • Thread pool rejected count • Circuit Breaker tripped count elasticsearch_exporterͰऩूͰ͖Δ Elasticsearchʹؔ͢ΔϝτϦΫεͷҰྫ
• Fielddata cache size • Query cache size • Query
cache ώοτ (hit / total) • Request cache size elasticsearch_exporterͰऩूͰ͖Δ Elasticsearchʹؔ͢ΔϝτϦΫεͷҰྫ
elasticsearch_exporterҎ֎Ͱ औಘ͍ͯ͠Δ Elasticsearchؔ࿈ͷϝτϦΫε
• ϦΫΤετճ • ྫ֎ൃੜճ • Search latency percentile (0.5, 0.75,
0.98, 0.99, 0.999) prometheus_clientΛαʔόαΠυΞϓϦʹΈࠐΜͰ DropWizard MetricsͰऩू͍ͯ͠ΔϝτϦΫε
• Slow logൃੜճ • NorikraͰूܭ • Raw slow log •
Elasticsearchʹอଘ • Elasticsearchʹอଘͨ͠σʔλKibanaͰݟΔͷ͕Ұൠత ͩͱࢥ͏͕ɺ͍׳Ε͍ͯΔGrafanaͰҰ୴ݟΔࣄʹͨ͠ slow logΛFluentdͰऩू
slow log ՄࢹԽͷ֓ཁਤ
·ͱΊ
• ެࣜυΩϡϝϯτΛಡ͏ • ެࣜAnsible playbook͓͢͢Ί • ύϥϝʔλͷઃఆมߋɺAPIͰಈతʹग़དྷΔͷͱग़དྷͳ͍ ͷ͕͋Δ • elasticsearch_exporter͚ͩͰऩूͰ͖ͳ͍ϝτϦΫεผͷ
ํ๏Ͱɻ • αʔόαΠυΞϓϦʹDropWizard MetricsΛΈࠐΜͰܭଌ • slow logΛऩूͯ͠NorikraͰूܭ • Raw slow logผͷElasticsearchʹอଘ
ิ • X-Pack MonitoringΛΠϯετʔϧ͢ΔͱɺϝτϦΫεσʔλ Λอଘ͢Δઐ༻ͷΠϯσοΫε͕ग़དྷΔɻΠϯσοΫεͷอ ଘઌผͷElasticsearchΫϥελʹ͠·͠ΐ͏ • Thread poolؔ࿈ͷύϥϝʔλνϡʔχϯάɺqueue_size͚ͩ ૿ͯ͠ύϑΥʔϚϯε্͕ΒͣΩϡʔ͕ͪ૿͑Δ͚ͩ
ͳͷͰɺsize߹Θͤͯνϡʔχϯά͠·͠ΐ͏ https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-threadpool.html • indices.store.throttle.max_bytes_per_sec Elasticsearch 6.0 Ͱഇࢭ͞Ε·͢ https://www.elastic.co/guide/en/elasticsearch/reference/6.0/breaking_60_settings_changes.html
Thank you :)