Kubernetes : Control Plane ノードの設定2024/11/06 |
Kubeadm をインストールして、マルチノード Kubernetes クラスターを構成します。 当例では以下のように 3 台のノードを使用して設定します。 -----------+---------------------------+--------------------------+------------ | | | eth0|10.0.0.30 eth0|10.0.0.51 eth0|10.0.0.52 +----------+-----------+ +-----------+----------+ +-----------+----------+ | [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] | | Control Plane | | Worker Node | | Worker Node | +----------------------+ +----------------------+ +----------------------+ |
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Control Plane ノードで初期セットアップします。 [control-plane-endpoint] には Etcd や Kubernetes API サーバー等のコンポーネントが実行されるホストの IP アドレスを指定します。
[--pod-network-cidr] には、Pod Network が利用するネットワークを指定します。 ⇒ https://kubernetes.io/docs/concepts/cluster-administration/networking/ 当例では Calico で進めます。 |
[root@dlp ~]# kubeadm init --control-plane-endpoint=10.0.0.30 --pod-network-cidr=192.168.0.0/16 --cri-socket=unix:///var/run/crio/crio.sock [init] Using Kubernetes version: v1.29.10 [preflight] Running pre-flight checks [preflight] Pulling images required for setting up a Kubernetes cluster [preflight] This might take a minute or two, depending on the speed of your internet connection [preflight] You can also perform this action in beforehand using 'kubeadm config images pull' [certs] Using certificateDir folder "/etc/kubernetes/pki" [certs] Generating "ca" certificate and key [certs] Generating "apiserver" certificate and key [certs] apiserver serving cert is signed for DNS names [dlp.srv.world kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 10.0.0.30] ..... ..... Your Kubernetes control-plane has initialized successfully! To start using your cluster, you need to run the following as a regular user: mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config Alternatively, if you are the root user, you can run: export KUBECONFIG=/etc/kubernetes/admin.conf You should now deploy a pod network to the cluster. Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at: https://kubernetes.io/docs/concepts/cluster-administration/addons/ You can now join any number of control-plane nodes by copying certificate authorities and service account keys on each node and then running the following as root: kubeadm join 10.0.0.30:6443 --token gvllup.00w3n7chdes7wwze \ --discovery-token-ca-cert-hash sha256:e1de67c31493734b93020f67eb817947caaa2bfb3d0e4bc62993c2b8e774d399 \ --control-plane Then you can join any number of worker nodes by running the following on each as root: kubeadm join 10.0.0.30:6443 --token gvllup.00w3n7chdes7wwze \ --discovery-token-ca-cert-hash sha256:e1de67c31493734b93020f67eb817947caaa2bfb3d0e4bc62993c2b8e774d399 # クラスター管理ユーザーの設定 # 一般ユーザーを管理ユーザーとする場合は、該当ユーザー自身で sudo cp/chown *** [root@dlp ~]# mkdir -p $HOME/.kube [root@dlp ~]# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config [root@dlp ~]# chown $(id -u):$(id -g) $HOME/.kube/config
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[3] | Calico での Pod Network を構成します。 |
[root@dlp ~]# wget https://raw.githubusercontent.com/projectcalico/calico/master/manifests/calico.yaml [root@dlp ~]# kubectl apply -f calico.yaml poddisruptionbudget.policy/calico-kube-controllers created serviceaccount/calico-kube-controllers created serviceaccount/calico-node created serviceaccount/calico-cni-plugin created configmap/calico-config created customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/bgpfilters.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/caliconodestatuses.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipreservations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/tiers.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/adminnetworkpolicies.policy.networking.k8s.io created clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created clusterrole.rbac.authorization.k8s.io/calico-node created clusterrole.rbac.authorization.k8s.io/calico-cni-plugin created clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created clusterrolebinding.rbac.authorization.k8s.io/calico-node created clusterrolebinding.rbac.authorization.k8s.io/calico-cni-plugin created daemonset.apps/calico-node created deployment.apps/calico-kube-controllers created # 確認 : STATUS = Ready であれば OK [root@dlp ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION dlp.srv.world Ready control-plane 3m6s v1.29.9 # 確認 : 全て Running であれば OK [root@dlp ~]# kubectl get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE kube-system calico-kube-controllers-5f9c988956-572fg 1/1 Running 0 53s kube-system calico-node-mwdjl 1/1 Running 0 53s kube-system coredns-76f75df574-6kxxl 1/1 Running 0 3m3s kube-system coredns-76f75df574-mrsw7 1/1 Running 0 3m3s kube-system etcd-dlp.srv.world 1/1 Running 0 3m13s kube-system kube-apiserver-dlp.srv.world 1/1 Running 0 3m18s kube-system kube-controller-manager-dlp.srv.world 1/1 Running 0 3m13s kube-system kube-proxy-448wq 1/1 Running 0 3m4s kube-system kube-scheduler-dlp.srv.world 1/1 Running 0 3m20s |
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