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使用kubeadm安装k8s集群(v1.18.0)

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一、安装环境 系统 [root@master1 ~]# cat /etc/redhat-release CentOS Linux release 7.9.2009 (Core)[root@master1 ~]# uname -aLinux master1 3.10.0-1160.el7.x86_64 #1 SMP Mon Oct 19 16:18:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux 配置

一、安装环境

  • 系统
  • [root@master1 ~]# cat /etc/redhat-release CentOS Linux release 7.9.2009 (Core)[root@master1 ~]# uname -aLinux master1 3.10.0-1160.el7.x86_64 #1 SMP Mon Oct 19 16:18:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
  • 配置
  • 角色

    IP

    配置

    master1

    172.16.0.11

    4核4G内存

    node1

    172.16.0.12

    4核4G内存

    node2

    172.16.0.13

    4核4G内存

    二、基础配置(所有服务器都要配置)

  • 更改服务器名称
  • hostnamectl set-hostname master1 #在master1上操作hostnamectl set-hostname node1 #在node1上操作hostnamectl set-hostname node2 #在node2上操作
  • 添加域名绑定(所有服务器都要操作)
  • cat >> /etc/hosts << EOF172.16.0.11 master1172.16.0.12 node1172.16.0.13 node2EOF
  • 关闭防火墙
  • systemctl stop firewalld && systemctl disable firewalld
  • 关闭selinux
  • setenforce 0 && sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
  • 关闭swap分区
  • swapoff -a && sed -ri 's/.*swap.*/#&/' /etc/fstab

    6.将桥接的IPv4流量传递到iptables的链

    cat > /etc/sysctl.d/k8s.conf << EOFnet.bridge.bridge-nf-call-ip6tables = 1net.bridge.bridge-nf-call-iptables = 1EOFsysctl --system #让配置生效
  • 配置时间同步
  • yum install -y ntpdate && ntpdate time.windows.com

    三、安装docker(所有服务器都要配置)

  • 卸载旧版本的docker
  • yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine
  • 安装docker
  • yum install -y wgetwget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repoyum -y install docker-ce-18.06.1.ce-3.el7
  • 启动docker及配置为开机启动
  • systemctl enable docker && systemctl start docker
  • 查看docker版本
  • docker --version
  • 配置阿里云镜像加速
  • mkdir -p /etc/dockertee /etc/docker/daemon.json <<-'EOF'{ "registry-mirrors": ["https://sx15mtuf.mirror.aliyuncs.com"]}EOFsystemctl daemon-reloadsystemctl restart docker

    四、添加阿里云yum源(所有服务器都要配置)

    cat > /etc/yum.repos.d/kubernetes.repo << EOF[kubernetes]name=Kubernetesbaseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64enabled=1gpgcheck=0repo_gpgcheck=0gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpgEOF

    五、安装kubeadm、kubelet、kubectl(所有服务器都要配置)

  • 安装三大件
  • yum install -y kubelet-1.18.0 kubeadm-1.18.0 kubectl-1.18.0
  • 设置开机启动
  • systemctl enable kubelet

    六、初始化master1节点(仅master1节点操作)

  • 初始化master1节点
  • kubeadm init \ --apiserver-advertise-address=172.16.0.11 \ --image-repository registry.aliyuncs.com/google_containers \ --kubernetes-version v1.18.0 \ --service-cidr=10.96.0.0/12 \ --pod-network-cidr=10.244.0.0/16
  • 配置kubectl工具
  • mkdir -p $HOME/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configsudo chown ( i d − u ) : (id -u):(id−u):(id -g) $HOME/.kube/config

    七、部署CNI插件(仅master1节点操作)

    wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.ymlkubectl apply -f kube-flannel.ymlkubectl get pods -n kube-system #查看flannel状态kubectl get nodes #flannel就绪后,我们可以看到master1也已经就绪

    八、添加node节点(所有node节点上操作)

  • 将master1节点的flannel配置拷贝到node节点
  • scp -r /etc/cni root@172.16.0.12:/etc/cni #这个是在master1上操作的systemctl restart kubelet
  • 将node节点加入到集群
  • kubeadm join 172.16.0.11:6443 --token x1spbh.gfwauz5pp9x8jk5j --discovery-token-ca-cert-hash sha256:601a110b6cb91577322b3dc2253140a5f2c2eed6873495c213ff9795dcdfb2a6
  • 查看节点状态
  • kubectl get nodes

    九、测试

    kubectl create deployment nginx --image=nginxkubectl expose deployment nginx --port=80 --type=NodePortkubectl get pod,svc

    十、安装dashboard

  • 下载yml文件
  • wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-rc7/aio/deploy/recommended.yaml
  • 将recommended.yaml如下两处新增
  • kind: ServiceapiVersion: v1metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboardspec: type: NodePort #新增 ports: - port: 443 targetPort: 8443 nodePort: 30001 #新增 selector:k8s-app: kubernetes-dashboard
  • 执行并生效
  • kubectl create -f recommended.yaml
  • 创建serceaccount和clusterrolebinding资源YAML文件
  • vim adminuser.yamlapiVersion: v1kind: ServiceAccountmetadata: name: admin-user namespace: kubernetes-dashboard apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRoleBindingmetadata: name: admin-userroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-adminsubjects:- kind: ServiceAccount name: admin-user namespace: kubernetes-dashboard
  • 创建admin-user并且赋予admin-user集权管理员权限
  • kubectl create -f adminuser.yaml

    6.在浏览器中输入 ​​​https://172.16.0.11:30001/​​ ​​

    使用kubeadm安装k8s集群(v1.18.0)_docker

  • 查看token
  • [root@master1 ~]# kubectl get secret -n kubernetes-dashboardNAME TYPE DATA AGEdefault-token-nzrk4 kubernetes.io/service-account-token 3 89mkubernetes-dashboard-certs Opaque 0 89mkubernetes-dashboard-csrf Opaque 1 89mkubernetes-dashboard-key-holder Opaque 2 89mkubernetes-dashboard-token-bs9qp kubernetes.io/service-account-token 3 89m #找到此项[root@master1 ~]# kubectl describe secret kubernetes-dashboard-token-bs9qp -n kubernetes-dashboard Name: kubernetes-dashboard-token-bs9qpNamespace: kubernetes-dashboardLabels: <none>Annotations: kubernetes.io/service-account.name: kubernetes-dashboard kubernetes.io/service-account.uid: e03da0c2-3e9c-42d6-b1da-3417e3cc2764Type: kubernetes.io/service-account-tokenData====token: eyJhbGciOiJSUzI1NiIsImtpZCI6ImNfTmhqVFdsbXpiRUpTTnA1bEhNanhnMUNTY2lQUWJDd0FBcWljQXExejAifQ.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.0CVjK8WjyDiyYShSwyCyTKN-f3FoYDlgIX--_ISshxLmmzJJRJolqiUXkbCs_OBZUhOz_3tJarpjgnFUcoETpFgDjdB9naztbajTPrGDIgLzjVWKsvnsfAKaMGxnpyNLBnCQAQzmGBKfNBg6jnxhEAxcTkA42N0yxxX8-30PTNsZjW8hx8haoSYoUK_ttlVbi1ajT8JHg2YCo3Scxdg01niZpsTntmqtSeraxE7bPgDCGBX6281iMAhlT9vDXTkYUlFoEXqdIC717cvDsh-ky0xEkOR4pEnmUiOTEIJWor_lr8LMA4FCaA1v2Xw-4f9rHDEzjWq2DTjn4DI2WWia2Aca.crt: 1025 bytesnamespace: 20 bytes[root@master1 ~]#
  • 输入token,就可以进入dashboard了
  • 使用kubeadm安装k8s集群(v1.18.0)_dashboard_02

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