添加工作节点
worker通过kubeadm join加入集群，加入所需的集群的token默认24小时过期
查看Token
1 kubeadm token list 2 # 如果失效创建一个新的 3 kubeadm create token 4 # 获取ca证书sha256编码hash值 5 openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //' 6 ## ffd76aed49c8f52dea15d16132897376176aea4c3ee50370e9369ca6c6c5a6b0
加入集群
1 kubeadm join 10.8.28.200:6443 --token k60p22.go0fadibgqm2xcx8 2 --discovery-token-ca-cert-hash sha256:ffd76aed49c8f52dea15d16132897376176aea4c3ee50370e9369ca6c6c5a6b0 3 --node-name k8s-test-node-1
以下为输出
[preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ [preflight] Reading configuration from the cluster... [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml' [kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.15" ConfigMap in the kube-system namespace [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml" [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env" [kubelet-start] Activating the kubelet service [kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap... This node has joined the cluster: * Certificate signing request was sent to apiserver and a response was received. * The Kubelet was informed of the new secure connection details. Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
检查node节点
1 [root@k8s-test-master-1 .kube]# kubectl get nodes 2 NAME STATUS ROLES AGE VERSION 3 k8s-test-master-1 Ready master 146m v1.15.1 4 k8s-test-master-2 Ready master 121m v1.15.1 5 k8s-test-master-3 Ready master 116m v1.15.1 6 k8s-test-node-1 Ready <none> 3m47s v1.15.1
测试
测试pod
1 # !!!待添加一个工作节点后运行 2 kubectl run nginx --image=nginx:1.14 --replicas=2 3 ## kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead. 4 ## deployment.apps/nginx created 5 kubectl get pods -o wide 6 ## NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES 7 ## nginx-7b4d6c6559-4j78l 1/1 Running 0 22s 192.168.49.2 k8s-test-node-1 <none> <none> 8 ## nginx-7b4d6c6559-nvlgg 1/1 Running 0 22s 192.168.49.1 k8s-test-node-1 <none> <none> 9 curl 192.168.49.2 10 ... 11 <title>Welcome to nginx!</title> 12 ...
测试dns
[root@k8s-test-master-1 ~]# kubectl run curl --image=radial/busyboxplus:curl -it kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead. If you don't see a command prompt, try pressing enter. [ root@curl-6bf6db5c4f-d5lv9:/ ]$ nslookup kubernetes.default Server: 10.96.0.10 Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local Name: kubernetes.default Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local