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Helmfile: Supercharge your deployment pipeline
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KUOKA Yusuke
May 27, 2020
Technology
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Helmfile: Supercharge your deployment pipeline
https://k8sjp.connpass.com/event/175030/
KUOKA Yusuke
May 27, 2020
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Transcript
Helmfile Supercharge your deployment pipeline Yusuke Kuoka / @mumoshu, Z
Lab Corporation
“Deploying to K8s is unnecessarily hard”
“Deploying to K8s is unnecessarily hard” • ʮKubernetesͷσϓϩΠͳΜΘ͔ΒΜʯ • kubectl
apply -f dir/ ҰͰ? • ͍͍͑͑
Α͋͘Δύϥϝʔλ • ϚχϑΣετॻ͖͍ͨ vs Ͱ͖Δ͚ͩॻ͖ͨ͘ͳ͍ • DRYʹ͍ͨ͠ vs ͨ͘͠ͳ͍ •
ࣗͰCI/CDΈ͍ͨ vs ͍ͤͨ • (ηΩϡϦςΟ|ύϑΥʔϚϯε|etc) ʹͩ͜ΘΔ vs ͩ͜ΘΒͳ͍ • KubernetesͷॊೈੑΏ͑બࢶ͕ଟ͍
Α͋͘Δ՝ • ૿͑ଓ͚Δπʔϧ • kubectl, kustomize, helm, kpt, go(client-go +
whatever), etc. • ཚཱ͢ΔWrapper • make, bash, ruby, go, js, yaml(CircleCI config.yml, GitHub Actions Workflow, …) • ߏཧ • WrapperͲ͜ (ΞϓϦέʔγϣϯϨϙδτϦ?ConfigRepo? • OSSͷެࣜϚχϑΣετ/ChartΛͦͷ··ͬͯΔͷ͔ɺforkͯ͠Δͷ͔ • forkͯ͠ΔͳΒࠩͲ͔͜ • πʔϧͷظ͢Δόʔδϣϯ?
Α͋͘Δରࡦ • ૿͑ଓ͚Δπʔϧ ← ϕετϓϥΫςΟεͷυΩϡϝϯτԽ • ཚཱ͢ΔWrapper ← ڞ௨ԽɾࣾπʔϧԽ •
ߏཧ ← نΛͭ͘Δ
ΊͰͨ͠ΊͰͨ͠?
Α͋͘Δ՝ - Phase 2 • ૿͑ଓ͚ΔυΩϡϝϯτπʔϧͷϝϯςφϯε • ेʹςετ͞Εͳ͍ࣾπʔϧ • ૿͑ଓ͚Δن
“Deployment on K8s is unnecessarily hard” • <—ίετେ— πʔϧઐνʔϜ, WG,
ਆ(K8s͓͡͞Μ), ϘϥϯςΟΞ —খ—> • େίετ͔͚ͨ΄͏͕πʔϧͱ͍ͯ͘͢͠ͳΔ(ܦݧଇ • ͏·͍͘͘·ͰίετΛ͔͚ଓ͚Δ͔ʁˠجຊతʹYes • ʢͰ͖Εʣ࠷খݶͷίετͰΛղܾ͍ͨ͠ • ୭͔͕طʹૺ۰ͨ͠ճආ͍ͨ͠ • େ͖ͳϛεΛճආ͍ͨ͠ • طଘπʔϧͳ͍ͷ͔ʁ
Helmfile
Helmfile: HISTORY & NUMBERS HelmϕʔεͷએݴతσϓϩΠπʔϧ https://github.com/roboll/helmfile/ - Nov. 2016: First
Commit by @roboll (Datadog) - Feb. 2018: @mumoshu as maintainer - Apr. 2018: ϓϩμΫγϣϯͰΘΕ࢝ΊΔ - 200ίϛοτɾ100ϦϦʔε/ - 2.1K GitHubελʔ @ 2020/05
Helmfile Benefits • πʔϧཚཱ ← ϚχϑΣετɾHelm Chartɾkustomizeαϙʔτ • ཚཱ͢ΔWrapper ←
helmfile͕kubectl/kustomize/helmͷڞ௨ Wrapperʹ • ߏཧ ← نΛͭ͘ΔͷͰͳ͘ɺhelmfileͷنΛར༻
Helm
Helmfile (helmfile.yaml)
Helmfile + Kustomize (./deploy/prod/kustomization.yamlΛHelmͰΠϯετʔϧ)
Helmfile as a “Wrapper” (ར༻πʔϧʹؔΘΒͣ౷ҰతͳίϚϯυͰෳΞϓϦΛҰׅཧ)
ߏཧ - ϓϩδΣΫτϧʔτʹ helmfile.yaml Λஔ͘ - ϓϩδΣΫτΘͣɺͨͩhelmfileΛ ࣮ߦ͢Δ͚ͩͰσϓϩΠՄೳ - ༨ྗ͕͋ΕͦΕҎ֎ͷཁૉͷ໋໊ن
ଇϑΝΠϧͷஔ͖ͷϧʔϧΛܾΊ Δ
ศརػೳ • Diff • όʔδϣϯϩοΫ • ϚχϑΣετੜ • Secretཧ •
Values provider: AWS SecretsManager/Vault/SOPS/Terraform State • DAG • σόοάࢧԉ (helmfile build, helmfile —debug)
None
None
None
None
Alternatives • Terraform + Kubernetes/Helm provider • Pulumi + Kubernetes
provider • AWS CDK / cdk8s • KPT (https://github.com/GoogleContainerTools/kpt) • Terraform + terraform-provider-helmfile
terraform-provider-helmfile https://github.com/mumoshu/terraform-provider-helmfile
Also see… • helmfile.yamlαϯϓϧू https://github.com/cloudposse/helmfiles • Helmfileͷsecret refػೳͰ͑ΔόοΫΤϯυ https://github.com/variantdev/vals/
·ͱΊ • Kubernetes ͚ͷσϓϩΠҙ֎ͱ໘ʢબࢶ͕ଟ͍͕ނʣ • kubectl/helm/kustomizeΛϥοϓ͢Δπʔϧ͕ಠࣗ։ൃ͞Ε͕ͪ • υΩϡϝϯτπʔϧͷ࡞ɾϝϯςίετ࠷খݶʹ͍ͨ͠ • ಠࣗ։ൃ෦ΛݮΒ͢
/ ཁ݅ʹ͋͏طଘπʔϧ͕͋Εར༻ • Helmfile͕͓ͦΒ͘࠷ଟػೳ • ൺֱݕ౼ީิʹೖΕΔͱɺඞཁͳػೳͷߟྀ࿙Ε͕ݮΒͤΔ͔