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軽量Kubernetesディストリビューションである"K3s"を支える拡張機能
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cheng
September 02, 2020
Technology
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800
軽量Kubernetesディストリビューションである"K3s"を支える拡張機能
Helm CLIのインストールが不要で、Helm CRDのみでアプリのライフサイクルを管理する「Helm Controller」を中心に紹介します。
cheng
September 02, 2020
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Transcript
© Copyright 2020 Rancher Labs. All Rights Reserved. 1 ©
Copyright 2020 Rancher Labs. All Rights Reserved. 1 ܰྔK8sσΟετϦϏϡʔγϣϯͰ͋Δ "K3s"Λࢧ͑Δ֦ுػೳ 2020/09/02 Cheng
About me Jianqiang Cheng(νΣϯ) Field Engineer at Rancher Labs.
[email protected]
[email protected]
▪Favorite technologies: Rancher, Kubernetes, AWS, Jenkins. ▪Certifications:
© Copyright 2020 Rancher Labs. All Rights Reserved. 3 K3sͱ?
© Copyright 2020 Rancher Labs. All Rights Reserved. 4 ΞʔΩςΫνϟ
© Copyright 2020 Rancher Labs. All Rights Reserved. 5 Helm
Controller Helm CLIͷΠϯετʔϧ͕ෆཁͰɺ Helm CRDͷΈͰΞϓϦͷϥΠϑα ΠΫϧΛཧ Service LB ΤοδଆͳͲɺCloud Provider͕ͳ ͍ڥͰɺLBλΠϓͷserviceΛ࡞ Ͱ͖Δػೳ Traefik LB ܰྔͳIngress ControllerΛఏڙ local path provisioner ϩΧʔϧڥͰstorageClassͷ provisionerΛఏڙ K3sͷ֦ுػೳͷ֓ཁ
© Copyright 2020 Rancher Labs. All Rights Reserved. 6 Helm
Controller • HelmK8sͷύοέʔδϚωʔδϟʔ • k3s Helm ControllerɺHelmͷv2ͱv3ͷ྆ํΛαϙʔτ • v1.17.0+k3s1Ҏ্ͷόʔδϣϯɺv3Λαϙʔτ։࢝ • Helm Controllerͷಛ • ϢʔβʔମݧΛ্ • K3sͷػೳ֦ு͕؆୯ʹ https://helm.sh/docs/faq/#changes-since-helm-2
© Copyright 2020 Rancher Labs. All Rights Reserved. 7 Helm
ControllerΈ Library: https://github.com/rancher/helm-controller https://github.com/rancher/klipper-helm 1. Helm-controllermaster nodeʹ࣮ߦ͞Ε、HelmChart CRDΛlist/watch 2. CRD͕onChange࣌ʹɺΞϓϦߋ৽༻ͷJobΛ࣮ߦ 3. Jobʹɺrancher/kilipper-helmΛίϯςφͰ࣮ߦ 4. Killper-helmɺଂͷhelm cliͰChatΛΠϯετʔϧΞοϓσʔτ
© Copyright 2020 Rancher Labs. All Rights Reserved. 8 HelmChart
CRDͷσϓϩΠํࣜ • 「/var/lib/rancher/k3s/server/manifestsʯʹೖ͍ͬͯΔ HelmChart͕ࣗಈʹσϓϩΠ͞ΕΔ • Kubectl applyʹΑΔHelmChart CRDͷΠϯετʔϧ • CRDܦ༝ͰσϓϩΠͨ͠ΞϓϦɺhelm CLI͔Βૢ ࡞Ͱ͖Δ
© Copyright 2020 Rancher Labs. All Rights Reserved. 9 Demo
• ,T্ʹɺHelmChart CRDͰఆٛͨ͠ΞϓϦͷσϓϩΠ • ্هͰσϓϩΠͨ͠ΞϓϦΛɺhelm cliͰཧ
© Copyright 2020 Rancher Labs. All Rights Reserved. 10 Helm
Controller ·ͱΊ • Ϣʔβʔମݧͷ্ • HelmChart CRDにより、機能拡張が簡単になる CI/CD integration, etc • Helm CLIと互換性がある • 利用しているOSSは下記である • rancher/helm-controller • rancher/kilipper-helm
© Copyright 2020 Rancher Labs. All Rights Reserved. 11
© Copyright 2020 Rancher Labs. All Rights Reserved. 12 12
͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ