Building HA Kubernetes Clusters with RKE

by Kazumichi Yamamoto

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n %PXOMPBE3,&CJOBSZ *OTUBMM3,& $ curl -L -o rke $RKE_URL n 3VODINPE $ chmod +x rke 3,&@63-IUUQTHJUIVCDPNSBODIFSSLFSFMFBTFTEPXOMPBEWSLF@EBSXJOBNE

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n .JOJNBMDMVTUFSZNM $SFBUFDMVTUFSZNM node: - address: 1.2.3.4 user: ubuntu role: [etcd, controlplane, worker]

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3VOlSLF VQz $ ./rke up --config cluster.yml

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n DMVTUFSZNM /PEFSPMFT node: - address: 1.2.3.4 user: ubuntu role: [etcd, controlplane, worker]

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3FEVOEBOUXPSLFST n .VMUJQMFXPSLFSQSPWJTJPOJOH node: - address: 192.2.0.1 role: [controlplane, etcd] - address: 192.2.0.2 role: [worker] - address: 192.2.0.3 role: [worker] - address: 192.2.0.4 role: [worker]

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n .VMUJQMFFUDE QSPWJTJPOJOH node: - address: 192.2.0.1 role: [etcd, controlplane, workers] - address: 192.2.0.2 role: [etcd, controlplane, workers] - address: 192.2.0.3 role: [etcd, controlplane, workers] FUDE $MVTUFSJOH

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FUDE $MVTUFSJOH n FUDE CPPUTUSBQDPOGJHVSBUJPO $ docker inspect etcd ... --initial-cluster= etcd-node1=https://192.2.0.1:2380, etcd-node2=https://192.2.0.2:2380, etcd-node3=https://192.2.0.3:2380

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FUDE $MVTUFSJOH n "1*4FSWFSTCPPUTUSBQDPOGJHVSBUJPO $ docker inspect kube-apiserver ... --etcd-servers= https://192.2.0.1:2379, https://192.2.0.2:2379, https://192.2.0.3:2379

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n .VMUJQMFDPOUSPMQMBOF QSPWJTJPOJOH node: - address: 192.2.0.1 role: [etcd, controlplane, workers] - address: 192.2.0.2 role: [etcd, controlplane, workers] - address: 192.2.0.3 role: [etcd, workers] 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST

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n "OTXFS6TF3,&OHJOYQSPYZ $ cat /etc/kubernetes/ssl/kubecfg-kube-node.yaml apiVersion: v1 kind: Config clusters: - cluster: api-version: v1 server: "https://127.0.0.1:6443" name: "local" 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST

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n MFBEFSFMFDUGMBH TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO $ docker inspect kube-scheduler ... --leader-elect=true $ docker inspect kube-controller-manager ... --leader-elect=true

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