Argo Workflow ʹΑΔMLδϣϒ؅ཧ Shotaro Tanaka / @yubessy / Ϧϒηϯε (ژ౎ΦϑΟε) MACHINE LEARNING Meetup KANSAI #4 LT

͜Εͷ঺հ͠·͢

https://argoproj.github.io/

Կ͕Ͱ͖Δͷ͔ "Container native workflow engine for Kubernetes" • ෳ਺ͷίϯςφΛ௚ྻ/ฒྻ࣮ߦ͢ΔϫʔΫϑϩʔΛఆٛͰ͖Δ • σʔλύΠϓϥΠϯ, CI/CD ͳͲͷར༻Λ૝ఆ • ৽όʔδϣϯͰ͸ DAG ΋αϙʔτ • Argo ϕʔεͷ༷ʑͳϓϩμΫτ • Argo CD: GitOps ʹΑΔ CD Λ࣮ݱ • Argo Event: ϫʔΫϑϩʔͷτϦΨ

apiVersion: argoproj.io/v1alpha1 kind: Workflow metadata: generateName: ml-workflow- spec: entrypoint: main templates: - name: main steps: - - name: load-dataset template: load-dataset - - name: train-model-1 template: train-model arguments: parameters: [{name: model, value: model1}] - name: train-model-2 template: train-model arguments: parameters: [{name: model, value: model2}] ...

... - name: load-dataset container: image: postgres:latest command: [sh, -c] args: ["psql db -c 'SELECT * FROM dataset' -A -F, > dataset.csv"] - name: train-model inputs: parameters: [{name: model}] container: image: train-model command: [sh -c] args: ["python train_model.py --model={{inputs.parameters.model}}"]

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ͳͥ࢖͏ͷ͔ ʮϞσϧ͕Ͱ͖ͨͷͰɺαΫοͱӡ༻ʹ৐͍ͤͨʯ • MLϞσϧͷ։ൃऀ • SQL Ͱσʔλऔಘ ʙ Ϟσϧ΍༧ଌ஋ΛϑΝΠϧʹग़ྗ • Docker Ͱಈ͘Α͏ʹ͓ͯ͘͠ • MLγεςϜͷ։ൃऀ • DBIO ΍Ϟσϧɾ༧ଌ݁ՌͷσϦόϦॲཧΛ࣮૷ • Argo Ͱ͢΂ͯΛ૊Έ߹ΘͤͨϫʔΫϑϩʔΛ࡞Δ → ίϯςφ୯ҐͰ໾ׂ෼୲

ϦϒηϯεͰͷར༻ྫ • ग़ྗͷDBॻ͖ࠐΈॲཧͷ෼཭ • Ϟσϧͷ Continuous Delivery • ฒߦॲཧ

ग़ྗͷDBॻ͖ࠐΈॲཧͷ෼཭ • ٻਓαΠτͷݕࡧॱҐ੍ޚ༻༧ଌϞσϧ • όονͰֶशɾ༧ଌ͠ग़ྗΛDBʹॻ͖ࠐΈ • Ϟσϧͷ։ൃऀ͸CSVग़ྗ·Ͱ࣮૷ͯ͠ Docker Խ͓ͯ͘͠ • ॻ͖ࠐΈॲཧ΍ΫϨσϯγϟϧ؅ཧ͸γεςϜͷ։ൃऀ͕࣮૷ steps: - - name: train-model # MLϞσϧͷ։ൃऀ͕࣮૷ - - name: predict-rates # MLϞσϧͷ։ൃऀ͕࣮૷ (ग़ྗ͸CSV) - - name: import-to-db # MLγεςϜͷ։ൃऀ͕࣮૷ # ※ग़ྗϑΝΠϧ͸ڞ༗ϘϦϡʔϜͰड͚౉͠

Ϟσϧͷ Continuous Delivery • Ӧۀઓུɾ޿ࠂग़ߘΛ૝ఆͨ͠ٻਓޮՌਪఆϞσϧ • ϚʔέςΟϯά୲౰ऀ޲͚ͷϏϡʔϫΛ R-Shiny Ͱ։ൃɾӡ༻ • ਪఆॲཧ͕׬ྃ͢ΔͨͼʹϏϡʔϫΛσϓϩΠͯ͠ϞσϧΛߋ৽ steps: - - name: estimate # ਪఆॲཧ - - name: upload-model # ࡞੒͞ΕͨϞσϧΛετϨʔδʹอଘ - - name: update-viewer # ϏϡʔϫΛσϓϩΠ͠௚͢

Ϟσϧͷ Continuous Delivery (ଓ͖) • Ϗϡʔϫ΋ಉ͡ Kubernetes ΫϥελͰ Deployment ͱ͍ͯಈ͍͍ͯΔ • kubectl set env Ͱ Deployment Λߋ৽͢Δ͜ͱͰ৽͍͠ϞσϧΛಡΈࠐΉ • Rolling Update ʹΑΓμ΢ϯλΠϜແ͠ͷϞσϧߋ৽΋Մೳ - name: update-viewer container: image: kubectl command: ["sh", "-c"] args: ["kubectl set env deployment/viewer-app MODEL={{workflow.parameters.model}}"]

ฒߦॲཧ • Webςετͷଟ࿹όϯσΟοτ࠷దԽͷॏΈߋ৽δϣϒ • ෳ਺ͷςετ͕૸͓ͬͯΓɺ֤ςετͷਪఆॲཧ͸ฒߦ࣮ߦ͍ͨ͠ steps: - - name: list-experiments # ਪఆॲཧ͕ඞཁͳςετΛϦετΞοϓ - - name: calc-weights # ͜ΕΛϦετΞοϓ͞Εͨςετͷ਺͚ͩฒߦ࣮ߦ͢Δ # ग़ྗύϥϝʔλͷϦετΛ౉͢ͱͦͷ਺͚ͩίϯςφ্ཱ͕͕ͪΔ # Ϧετ͸ [{"experimentId": 1}, {"experimentId": 2}] ͷΑ͏ͳ JSON withParams: "{{steps.list-experiments.outputs.parameters.experiments}}" # Ϧετͷ֤ΞΠςϜ͔ΒύϥϝʔλΛऔΓग़ͯ͠౉͢ arguments: parameters: [{name: experimentId, value: "{{item.experimentId}}"}]

ฒߦॲཧ (ଓ͖) templates: - name: list-experiments container: ... outputs: parameters: - name: experiments # ग़ྗύϥϝʔλͷϦετΛϑΝΠϧࢦఆ valueFrom: {path: /output/experiments.json} - name: calc-weights container: ... inputs: parameters: # ύϥϝʔλΛೖྗ஋ͱͯ͠ड͚औΔ - name: experimentId

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·ͱΊ • ෳ਺ίϯςφ͔ΒͳΔϫʔΫϑϩʔΛ؆୯ʹ૊ΊΔ • ͭͬͨ͘MLϞσϧΛ͢͹΍͘ӡ༻͍ͨ͠ͱ͖ʹศར هࣄ΋͋Γ·͢: Argo ʹΑΔίϯςφωΠςΟϒͳσʔλύΠϓϥΠϯͷϫʔΫϑϩʔ؅ཧ