kindで作るローカルk8s開発環境

Transcript

1. kindͰ࡞ΔϩʔΧϧk8s։ൃ؀ڥ
   2020/1 @sinohara
   

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2. TL;DR
   • kubernetes͸ॳֶऀ΁ͷෑډ͕૬มΘΒͣߴ͍
   • kind͸docker͕ಈ͘؀ڥ͑͋͞Ε͹kubernetes
   ؀ڥ͕࡞ΕΔͷͰ͓קΊ
   

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3. Kenta Shinohara @ NSݚN੍PωࣜDP
   • Ϋϥ΢υωΠςΟϒNFVج൫ͷݚڀɾ։ൃ
   • 1/31 NTT Tech Conference #4ͰLT͠·ͨ͠
   Copyright©2020 NTT Corp. All Rights Reserved. NTT Tech Conf#4 @2020/1/31 1
   

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4. ຊ೔ͷ͓୊ɿ
   ϩʔΧϧk8s؀ڥ
   • k8s৮ͬͨ͜ͱ͋Δਓʁ
   • ͓ࢼ͢͠Δʹ΋k8s؀ڥͬͯ
   ΍ͬͺΓෑډ͕ߴ͍
   

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5. ϚωʔδυαʔϏεʁ
   • ߏஙʹ20෼͔͔Δ
   • ߴ͍($72/݄~)
   • 5෼͘Β͍Ͱߏஙग़དྷΔ
   • ߴ͍($24/݄)
   

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6. ϩʔΧϧ k8sʁ • minikube
   • hypervisorϕʔε
   • Virtual box, hyperkit, parallels, vmware,
   etc…
   • 2vCPU / 2GB mem
   • γϯάϧϊʔυΫϥελ
   • master/workerಉډߏ੒
   • ΋͏গͪ͠ΌΜͱͨ͠؀ڥ͕ཉ͍͠ɾɾ
   

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7. kind : kubernetes in docker
   • dockerίϯςφ্Ͱmulti-node cluster؀ڥΛ
   ࡞Δߏஙπʔϧ
   

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8. how to use kind
   kind-config.yml
   

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9. how to use kind
   

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10. kind architecure
    Server
    docker docker docker
    Kube-apiserver
    Kube-controller
    Kube-scheduler
    etcd
    kube-proxy
    coredns
    Image: kindest/node:v1.17.0
    kind.cluster: test
    kind.role: control-plane
    Image: kindest/node:v1.17.0
    kind.cluster: test
    kind.role: worker
    Image: kindest/node:v1.17.0
    kind.cluster: test
    kind.role: worker
    Kubelet
    kube-proxy
    Kubelet Kubelet
    kube-proxy
    cni: kindnet
    cni: kindnet cni: kindnet
    EPDLFS CSJEHF
    
    ίϯςφͷJQSPVUFJQUBCMFTΛ؅ཧ
    

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11. ࢀߟɿπʔϧൺֱ
    • kind
    • minikube virtualbox
    • minikube hyperkit
    kind
    Minikube
    virtualbox
    Minikube
    hyperkit
    Start-up time
    [sec]
    82 133.65 141.14
    CPU% 25 30 20
    Memory [MiB] 622 2071
    * wired down pages
    2615
    node
    Master x1
    worker x2
    Single node Single node
    environment: MacBook Pro 2017, CPU: Intel Core i5 2.3GHz, Memory: 16GB
    

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12. ࢀߟɿkindnet-cni
    

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13. kindΛ࢖͑͹ɾɾ
    • docker؀ڥ͑͋͞Ε͹k8s؀ڥΛ
    ϩʔΧϧͰ࡞ΕΔʂ
    • minikubeΑΓಈ࡞͕଎ͯܰ͘ྔʂ
    • multi-node؀ڥͰ༡΂Δʂ
    

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15. kind architecure ;ͨͨͼ
    Server
    docker docker docker
    Kube-apiserver
    Kube-controller
    Kube-scheduler
    etcd
    kube-proxy
    coredns
    Image: kindest/node:v1.17.0
    kind.cluster: test
    kind.role: control-plane
    Image: kindest/node:v1.17.0
    kind.cluster: test
    kind.role: worker
    Image: kindest/node:v1.17.0
    kind.cluster: test
    kind.role: worker
    Kubelet
    kube-proxy
    Kubelet Kubelet
    kube-proxy
    cni: kindnet
    cni: kindnet cni: kindnet
    EPDLFS CSJEHF
    
    frontend Pod frontend Pod
    frontend Pod
    Redis-master Pod
    Redis-slave Pod Redis-slave Pod
    github/kubernetes/examples/guestbook
    

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16. docker ps
    Kubernetes resource
    ϗετ͔Β1PEʹ౸ୡ͢Δܦ࿏͕ແ͍
    

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17. kubefwd
    • https://github.com/txn2/kubefwd
    • kubectl port-forwardΛ·ͱΊ࣮ͯߦͯ͘͠ΕΔπʔϧ
    

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20. Takeaways
    • kind+kubefwdΛ࢖ͬͨk8s։ൃ؀ڥͷ঺հ
    • ҎԼͷ੍໿͸͋Δ͚Ͳେମͷέʔε͸OK?
    • kubectl port-forward͸UDPඇରԠ
    • localͰϏϧυͨ͠ίϯςφΠϝʔδ͸
    `kind load`ίϚϯυͰk8sίϯςφʹΠϝʔδసૹ͢Δඞཁ͋Γ
    

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