[雲端] K8S / 安裝 script

[雲端] K8S / 安裝 script === ###### tags: `雲端 / K8s` ###### tags: `雲端`, `K8s` [TOC] ## 若已經有 k8s，想要重新安裝，可執行 kubectl reset - [詳細資訊](/kD5ynMNsRH-TWq9KUwXfCQ#kubectl-reset) ## k8s.sh > ``` > sudo sh k8s.sh > ``` > - 目前可下載最新版號：1.22.0 (2021/08/16) > - 在執行 `kubeadm init` 前，將 driver 從 cgroupfs 變更為 systemmd ```shell= #!/bin/bash # Add Kubernetes Repository and Install Kubernetes curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add sudo apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main" sudo apt-get update sudo swapoff -a # List Kubernetes Versions curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}' # Install Kubernetes with version 1.17.3 # sudo apt-get install -qy kubelet=1.17.3-00 kubectl=1.17.3-00 kubeadm=1.17.3-00 # ^^^ v1.21.1... OK sudo apt-get install -qy kubelet kubectl kubeadm # 2021.05.13, # when executing 'kubeadm init ...', dump the following log: # [preflight] You can also perform this action in beforehand # using 'kubeadm config images pull' sudo kubeadm config images pull # Startup a Kubernetes Cluster (for master node) # sudo kubeadm init --service-cidr 10.96.0.0/12 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=10.78.153.130 # ^^^ NOT OK sudo kubeadm init --pod-network-cidr=10.244.0.0/16 # Setup Admin Config mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config # Install Flannel CNI kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml # Taint Master Node kubectl taint nodes --all node-role.kubernetes.io/master- # Install Kubernetes Dashboard #kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-rc2/aio/deploy/recommended.yaml # Get admin user token #kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep dashboard-token | awk '{print $1}') > token #echo "dashboard token=" #cat token ``` log: ``` 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 ``` - keywords: k8s/kubenetes, install, script ## Q&A - [[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd".](https://blog.csdn.net/M82_A1/article/details/97626309) /lib/systemd/ ```bash= $ sudo nano /etc/docker/daemon.json { "exec-opts":["native.cgroupdriver=systemd"] } ``` ```bash= systemctl restart docker systemctl status docker ``` ``` $ sudo systemctl status docker ● docker.service - Docker Application Container Engine Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled) ``` - 快速安裝 kubernete ```bash= sudo rm -rf $HOME/.kube/ sudo rm -rf /etc/kubernetes/ ``` ```bash= sudo kubeadm init --pod-network-cidr=10.244.0.0/16 ``` ```bash= mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config ``` - ### [How do I find the join command for kubeadm on the master?](https://stackoverflow.com/questions/51126164/) ``` kubeadm token create --print-join-command ``` or ``` kubeadm token list ``` ``` $ kubeadm join 10.0.2.15:6443 --token heynu5.1g65zecl0z4zxcb1 \ --discovery-token-ca-cert-hash sha256:bed37343beb691328455f8a1eee50ee26e82595346ee779fe647bd62e4172f6f # ------------------ $ kubeadm token list TOKEN TTL EXPIRES USAGES DESCRIPTION EXTRA GROUPS heynu5.1g65zecl0z4zxcb1 23h 2021-05-15T08:54:24+08:00 authentication,signing The default bootstrap token generated by 'kubeadm init'. system:bootstrappers:kubeadm:default-node-token ``` (2021.05.13, 待驗證) - ### [Coredns in pending state in Kubernetes cluster](https://stackoverflow.com/questions/52609257) >　According to this error, you forgot to initialize a Kubernetes Pod network add-on. Looking at your settings, I suppose it should be Flannel. >　 >　For flannel to work correctly, you must pass `--pod-network-cidr=10.244.0.0/16‵` to kubeadm init. ```bash= $ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/c5d10c8/Documentation/kube-flannel.yml ``` - ### [link text](https:// "title") > ### Control plane node isolation > By default, **your cluster will not schedule pods on the control-plane node for security reasons**. If you want to be able to schedule pods on the control-plane node, e.g. for a single-machine Kubernetes cluster for development, run: > ``` > $ kubectl taint nodes --all node-role.kubernetes.io/master- > ``` - ### [my kubernetes cluster is down after reboot](https://stackoverflow.com/questions/55555987) - 原因 Main PID: 2184 (code=exited, status=255/EXCEPTION) - 狀態 [![](https://i.imgur.com/xGqM1JV.jpg)](https://i.imgur.com/xGqM1JV.jpg) [![](https://i.imgur.com/dwIsZjk.png)](https://i.imgur.com/dwIsZjk.png) - 解決方法：==`sudo swapoff -a`== ``` $ curl 127.0.0.1:30080 curl: (7) Failed to connect to 127.0.0.1 port 30080: Connection refused $ systemctl status kubelet ● kubelet.service - kubelet: The Kubernetes Node Agent Loaded: loaded (/lib/systemd/system/kubelet.service; enabled; vendor preset: enabled) Drop-In: /etc/systemd/system/kubelet.service.d └─10-kubeadm.conf Active: activating (auto-restart) (Result: exit-code) since Fri 2021-05-14 09:15:53 CST; 4s ago Docs: https://kubernetes.io/docs/home/ Process: 2184 ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS (code=exited, st> Main PID: 2184 (code=exited, status=255/EXCEPTION) $ kubectl get nodes The connection to the server 10.0.2.15:6443 was refused - did you specify the right host or port? $ kubectl get pod -A The connection to the server 10.0.2.15:6443 was refused - did you specify the right host or port? ``` 執行： ```bash $ sudo swapoff -a ``` 等待片刻 ``` $ kubectl get nodes NAME STATUS ROLES AGE VERSION tj-virtualbox Ready master 22m v1.17.3 $ kubectl get pod NAME READY STATUS RESTARTS AGE tj-pod-kuard 0/1 Error 3 6m8s ... ... ... $ kubectl get pod NAME READY STATUS RESTARTS AGE tj-pod-kuard 1/1 Running 4 7m21s $ curl 127.0.0.1:30080 # OK ``` - ### [[[雲端] K8S / Helm] 安裝 Helm3](https://hackmd.io/5h33aCEKS5GJFoThP8hF6w#%E5%AE%89%E8%A3%9D-Helm3) ``` curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 \ && chmod 700 get_helm.sh \ && ./get_helm.sh ``` # Good work ```bash= sudo swapoff -a docker ps -a docker images # Add Kubernetes Repository and Install Kubernetes curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add sudo apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main" sudo apt-get update sudo swapoff -a # List Kubernetes Versions curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}' sudo apt-get install -qy kubelet kubectl kubeadm sudo kubeadm config images pull sudo kubeadm init --pod-network-cidr=10.244.0.0/16 kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml kubectl taint nodes --all node-role.kubernetes.io/master- sudo kubeadm join 10.0.2.15:6443 --token b272bh.pxlqf7r3xjswu4fc --discovery-token-ca-cert-hash sha256:7ae9817a12330ffadea5b0751579f0dad8ef2c95e12ce8aa5b5345cfbc437a48 --ignore-preflight-errors=all alias k=kubectl k get nodes k get pod -A ``` ![](https://i.imgur.com/i9s7z88.png)