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© Copyright 2020 Rancher Labs. All Rights Reserved. 1
© Copyright 2020 Rancher Labs. All Rights Reserved. 1
ܰྔK8sσΟετϦϏϡʔγϣϯͰ͋Δ
"K3s"Λࢧ͑Δ֦ுػೳ
2020/09/02
Cheng
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About me
Jianqiang Cheng（νΣϯ）
Field Engineer at Rancher Labs.
[email protected]
[email protected]
■Favorite technologies:
Rancher, Kubernetes, AWS, Jenkins.
■Certifications:
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© Copyright 2020 Rancher Labs. All Rights Reserved. 3
K3sͱ？
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© Copyright 2020 Rancher Labs. All Rights Reserved. 4
ΞʔΩςΫνϟ
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© 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
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Helm Controller
• HelmK8sͷύοέʔδϚωʔδϟʔ
• k3s Helm ControllerɺHelmͷv2ͱv3ͷ྆ํΛαϙʔτ
• v1.17.0+k3s1Ҏ্ͷόʔδϣϯɺv3Λαϙʔτ։࢝
• Helm Controllerͷಛ
• ϢʔβʔମݧΛ্
• K3sͷػೳ֦ு͕؆୯ʹ
https://helm.sh/docs/faq/#changes-since-helm-2
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© 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
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HelmChart CRDͷσϓϩΠํࣜ
• 「/var/lib/rancher/k3s/server/manifestsʯʹೖ͍ͬͯΔ
HelmChart͕ࣗಈʹσϓϩΠ͞ΕΔ
• Kubectl applyʹΑΔHelmChart CRDͷΠϯετʔϧ
• CRDܦ༝ͰσϓϩΠͨ͠ΞϓϦɺhelm CLI͔Βૢ
࡞Ͱ͖Δ
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Demo
• ,T্ʹɺHelmChart CRDͰఆٛͨ͠ΞϓϦͷσϓϩΠ
• ্هͰσϓϩΠͨ͠ΞϓϦΛɺhelm cliͰཧ
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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
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͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ