14Kubernetes高可用集群-集群部署

Kubernetes高可用集群部署目录01任务添加master节点master节点初始化02任务添加node节点03任务学习目标【知识目标】●掌握Kubernetes集群的初始化●

掌握Kubernetes集群master节点的添加；●

掌握Kubernetes集群node节点的添加；【技能目标】●

能够独立完成Kubernetes集群搭建；●

能够基于搭建过程中出现的问题进行基础排错。1master节点初始化master节点初始化在master1上创建kubeadm-config.yaml文件1[root@master1~]#vimkubeadm-config.yamlapiVersion:kubeadm.k8s.io/v1beta2kind:ClusterConfigurationkubernetesVersion:v1.20.6controlPlaneEndpoint:99:16443imageRepository:/google_containersapiServer:certSANs:-0-0-0-99networking:podSubnet:/16serviceSubnet:/16---apiVersion:kubeproxy.config.k8s.io/v1alpha1kind:KubeProxyConfigurationmode:ipvsmaster节点初始化#把初始化k8s集群需要的离线镜像包上传到master1、master2、node1机器上，手动解压：[root@master1~]#dockerload-ik8simage-1-20-6.tar.gz[root@master2~]#dockerload-ik8simage-1-20-6.tar.gz[root@node1~]#dockerload-ik8simage-1-20-6.tar.gz1master节点初始化初始化[root@master1]#kubeadminit--configkubeadm-config.yaml显示如下，说明安装完成：1master节点初始化[root@master1~]#mkdir-p$HOME/.kube[root@master1~]#sudocp-i/etc/Kubernetes/admin.conf$HOME/.kube/config[root@master1~]#sudochown$(id-u):$(id-g)$HOME/.kube/config[root@master1~]#kubectlgetnodesNAMESTATUS

ROLES

AGE

VERSIONmaster1

NotReadycontrol-plane,master60sv1.20.61配置kubectl工具2添加master节点添加master节点在master2创建证书存放目录：[root@master2~]#cd/root&&mkdir-p/etc/kubernetes/pki/etcd&&mkdir-p~/.kube/2复制证书添加master节点#把master1节点的证书拷贝到master2上：[root@master1~]#scp/etc/kubernetes/pki/ca.crtmaster2:/etc/kubernetes/pki/[root@master1~]#scp/etc/kubernetes/pki/ca.keymaster2:/etc/kubernetes/pki/[root@master1~]#scp/etc/kubernetes/pki/sa.keymaster2:/etc/kubernetes/pki/[root@master1~]#scp/etc/kubernetes/pki/sa.pubmaster2:/etc/kubernetes/pki/[root@master1~]#scp/etc/kubernetes/pki/front-proxy-ca.crtmaster2:/etc/kubernetes/pki/[root@master1~]#scp/etc/kubernetes/pki/front-proxy-ca.keymaster2:/etc/kubernetes/pki/[root@master1~]#scp/etc/kubernetes/pki/etcd/ca.crtmaster2:/etc/kubernetes/pki/etcd/[root@master1~]#scp/etc/kubernetes/pki/etcd/ca.keymaster2:/etc/kubernetes/pki/etcd/2复制证书添加master节点在master1上查看加入节点的命令：[root@master1~]#kubeadmtokencreate--print-join-commandkubeadmjoin99:16443--token74utu6.e9lj5503t3gi1zob--discovery-token-ca-cert-hashsha256:5ad501fa00cb041581731cb67be67b4edf172f521ad3ec1296af131725998c03\--control-plane。。。2添加master节点拷贝在master2上执行结果如下：2master节点初始化[root@master2~]#mkdir-p$HOME/.kube[root@master2~]#sudocp-i/etc/kubernetes/admin.conf$HOME/.kube/config[root@master2~]#sudochown$(id-u):$(id-g)$HOME/.kube/config2配置kubectl工具master节点初始化在master1上查看集群状况：[root@master1~]#kubectlgetnodesNAMESTATUS

ROLES

AGE

VERSIONmaster1NotReadycontrol-plane,master7m45sv1.20.6master2NotReadycontrol-plane,master91s

v1.20.62检查集群状况3添加node节点添加node节点在master1上查看加入节点的命令：[root@master1~]#kubeadmtokencreate--print-join-commandkubeadmjoin99:16443--tokenul88gb.mcdxogu43a17ti1r--discovery-token-ca-cert-hashsha256:5ad501fa00cb041581731cb67be67b4edf172f521ad3ec1296af131725998c03。。。3添加node节点拷贝在node1上执行结果如下：3添加node节点#在master1上查看集群节点状况：[root@master1~]#kubectlgetnodesNAMESTATUSROLES

AGE

VERSIONmaster1NotReadycontrol-plane,master10m

v1.20.6master2NotReadycontrol-plane,master3m50sv1.20.6node1

NotReady<none>

14s

v1.20.63检查集群状况添加node节点把node1的ROLES变成work：[root@master1~]#kubectllabelnodenode1node-role.kubernetes.io/worker=worker3检查集群状况添加node节点无网络插件，coredns-*是pending状态[root@master1~]#kubectlgetpods-nkube-systemNAME