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digdag-Introduction
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Masatoshi Shimada
August 19, 2016
Programming
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1.3k
digdag-Introduction
Digdagを本番導入したので社内勉強会で発表した資料です。
Masatoshi Shimada
August 19, 2016
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Transcript
Introduction of Digdag.
Who am I. • Twitter/GitHub Account • @smdmts • Main
Fields • Scala & Java8 & React.js & Python • DDD CleanArchitecture @ akka-http • Workflow • Hive/Presto
Agenda • Digdag = Workflow automation system.
ϫʔΫϑϩʔΤϯδϯͷओͳཁ݅ • ఆظతͳλεΫͷ࣮ߦ • λεΫͷॱ࣮࣍ߦ • γεςϜؒͷσʔλࣗಈ࿈ܞ • όονʹΑΔσʔλूܭͷࣗಈԽ •
όονδϣϒྃޙͷϝʔϧ/SlackͳͲ௨ • ϦτϥΠ࣌ʹ͓͚Δႈੑ
Digdagͱ • DAGʢDirected acyclic graph)Λ࣮ݱ͢ΔϫʔΫϑ ϩʔΤϯδϯ • YAMLͰDAGΛදݱ͢ΔͨΊఆٛମGitཧՄೳ ʢWorkflow as
Codeʣ • LocalϞʔυͰ։ൃ͠ɺClient/ServerϞʔυͰຊ൪ ͰՔಇͤ͞Δ • Python/Ruby/Bash/DockerͳͲͰαϒλεΫ͕࣮ ߦՄೳ
DigdagͱʢClient/ServerϞʔυʣ • PostgreSQLͰQueueΛ࣮ݱ͍ͯ͠Δ • αϒλεΫຖͰQueueԽ͞Ε͓ͯΓαʔόෳ Ͱ࣮ߦڥ͕εέʔϧՄೳ • Workflowͷ࣮ମPostgreSQLʹӬଓԽ͞ΕΔ • Client͕ίϚϯυͰWorkflowΛpush͢Δ
• Workflowੈཧ͞ΕΔ • ࠶ىಈෆཁͰδϣϒొʗ࠶࣮ߦՄೳ
DAG (Directed acyclic graph)ͱ • DAGʢ༗ඇ८ճάϥϑʣͱ ʢwikipedia) άϥϑཧʹ͓͚Δด࿏ͷͳ͍༗άϥϑͷࣄ ༗άϥϑͱ༗ลʢํΛࣔ͢ҹ͖ ͷลʣ͔ΒͳΓɺลಉ࢜Λͭͳ͙͕ɺ͋Δ
v ͔Βग़ൃ͠ɺลΛͨͲΓɺ v ʹͬͯ ͜ͳ͍ͷ͕༗ඇ८ճάϥϑͰ͋Δɻ
DAG (Directed acyclic graph)ͱ • DAGʢ༗ඇ८ճάϥϑʣͱ • తʹݴ͏ͱऴ͕ଘࡏ͠։࢝ʹͬͯ͜ͳ ͍άϥϑ
DigdagͰͷදݱํ๏ • YAMLͰΦϖϨʔλΛఆٛ timezone: UTC _export: mail: ..... # Definition
of mail +step1_input: py>: tasks.load _error: mail>: body.txt subject: input error! to: [me@example.com] +step2_process: sh>: echo process. +step2_report: sh>: echo report.
δϣϒϑϩʔߏུ֓ਤ
δϣϒϑϩʔߏུ֓ਤʹ͓͚Δఆٛ timezone: UTC +prepare_load_aws_env: py>: tasks.load_aws_env +step1_produce_tasks: # Generate SQL
Queries for Redshift. !include : 'child_tasks/produce_tasks/bootstrap.dig' +step2_create_redshift_buffer: # Internal S3 or TreasureData to Redshift temporary buffer. !include : 'child_tasks/create_redshift_buffer/bootstrap.dig' +step3_create_publisher_s3: # Create Redshift buffer to publisher s3 bucket. !include : 'child_tasks/create_publisher_s3/bootstrap.dig'
։ൃ/ӡ༻ͯ͠Έͨײ • Workflow͕ίʔυͰදݱ͞Ε σόοά༰қ ͳ ͷͰ ී௨ͷ։ൃͷϊϦ Ͱॱ൪ͱΤϥʔϋϯυϦ ϯάΛҙࣝͨ͠δϣϒΛΧδϡΞϧʹ࡞Εͨ •
Πϯετʔϧͷ؆қੑɺ࠶ىಈෆཁͷδϣϒ࠶ ొʗ࣮ߦՄೳͳͲɺಋೖ/։ൃ/ӡ༻ָ͕ʹͳΔ ͜ͱ͕ҙࣝͯ͠ઃܭ͞Ε͍ͯΔҹ • ࣮ߦॱংɺฒྻԽɺΤϥʔϋϯυϦϯάͷ੍ޚ͕ ඇৗʹ༰қͳҝɺશόονܥΛDigdagʹҠ͢Δ ࣄΛܾఆ
։ൃ࣌ʹൃੜͨ͠/՝ • py operatorར༻࣌ʹগ͠ϋϚͬͨ • ςετίʔυΛॻͨ͘Ίʹimport digdagͷ ϞοΫίʔυ͕ඞཁ • !includeͰผσΟϨΫτϦʹdigΛஔ͘ͱ
PythonεΫϦϓτؒͷґଘղܾͷ࣮͕ඞཁ • λεΫؒͷม࿈ܞdigdag.env.storeͰɺ શλεΫԣஅͰΩʔͷ໊લΛҰҙʹ͢Δඞཁ͋ ΓʢಉҰ໊শͰ্ॻ͖͕ൃੜ͢Δ߹༗Γʣ
։ൃ࣌ʹൃੜͨ͠/՝ʢิʣ • rb operatorར༻ͯ͠·ͤΜ
ӡ༻࣌ʹൃੜͨ͠/՝ • ӡ༻Ͱཉ͍͠ػೳ͕͋Δঢ়گʢ։ൃதʁʣ • ֬ೝը໘ (ίϚϯυͰճආத) • ਐߦঢ়گɾ࣮ߦ݁ՌɾΤϥʔͳͲ • ϩάͷS3ӬଓԽ
(S3FSͰճආத)
·ͱΊ • ࣗಈԽਖ਼ٛʂ