# kubernetes 1.4.5 > 更新 kubernetes 1.4.5 , 配置文档 # 1 初始化环境 ## 1.1 环境： |节点|IP| |----|----| |node-1|10.6.0.140| |node-2|10.6.0.187| |node-3|10.6.0.188| ## 1.2 设置hostname ``` hostnamectl --static set-hostname hostname ``` |IP|hostname| |----|----| |10.6.0.140|k8s-master| |10.6.0.187|k8s-node-1| |10.6.0.188|k8s-node-2| ## 1.3 配置 hosts ``` vi /etc/hosts ``` |IP|hostname| |----|----| |10.6.0.140|k8s-master| |10.6.0.187|k8s-node-1| |10.6.0.188|k8s-node-2| # 2 部署 kubernetes master ## 2.1 添加yum ``` ------------------------------------------------------ cat < /etc/yum.repos.d/k8s.repo [kubelet] name=kubelet baseurl=http://files.rm-rf.ca/rpms/kubelet/ enabled=1 gpgcheck=0 EOF ------------------------------------------------------ yum makecache yum install -y socat kubelet kubeadm kubectl kubernetes-cni ``` ## 2.2 安装docker ``` wget -qO- https://get.docker.com/ | sh systemctl enable docker systemctl start docker ``` ## 2.3 下载镜像 ``` images=(kube-proxy-amd64:v1.4.5 kube-discovery-amd64:1.0 kubedns-amd64:1.7 kube-scheduler-amd64:v1.4.5 kube-controller-manager-amd64:v1.4.5 kube-apiserver-amd64:v1.4.5 etcd-amd64:2.2.5 kube-dnsmasq-amd64:1.3 exechealthz-amd64:1.1 pause-amd64:3.0 kubernetes-dashboard-amd64:v1.4.1) for imageName in ${images[@]} ; do docker pull jicki/$imageName docker tag jicki/$imageName gcr.io/google_containers/$imageName docker rmi jicki/$imageName done ``` ## 2.4 启动 kubernetes ``` systemctl enable kubelet systemctl start kubelet ``` ## 2.5 创建集群 ``` kubeadm init --api-advertise-addresses=10.6.0.140 --use-kubernetes-version v1.4.5 ``` ## 2.6 记录 token ``` kubernetes master initialised successfully! You can now join any number of machines by running the following on each node: kubeadm join --token=cf9fd4.7a477d4299305b93 10.6.0.140 ``` ## 2.7 检查 kubelet 状态 ``` systemctl status kubelet ``` # 3 部署 kubernetes node ## 3.1 安装docker ``` wget -qO- https://get.docker.com/ | sh systemctl enable docker systemctl start docker ``` ## 3.2 下载镜像 ``` images=(kube-proxy-amd64:v1.4.5 kube-discovery-amd64:1.0 kubedns-amd64:1.7 kube-scheduler-amd64:v1.4.5 kube-controller-manager-amd64:v1.4.5 kube-apiserver-amd64:v1.4.5 etcd-amd64:2.2.5 kube-dnsmasq-amd64:1.3 exechealthz-amd64:1.1 pause-amd64:3.0 kubernetes-dashboard-amd64:v1.4.1) for imageName in ${images[@]} ; do docker pull jicki/$imageName docker tag jicki/$imageName gcr.io/google_containers/$imageName docker rmi jicki/$imageName done ``` ## 3.3 启动 kubernetes ``` systemctl enable kubelet systemctl start kubelet ``` ## 3.4 加入集群 ``` kubeadm join --token=cf9fd4.7a477d4299305b93 10.6.0.140 ``` ``` Node join complete: * Certificate signing request sent to master and response received. * Kubelet informed of new secure connection details. Run 'kubectl get nodes' on the master to see this machine join. ``` ## 3.5 查看集群状态 ``` [root@k8s-master ~]#kubectl get nodes NAME STATUS AGE k8s-master Ready 8m k8s-node-1 Ready 1m k8s-node-2 Ready 1m ``` # 4 设置 kubernetes ## 4.1 配置 POD 网络 ``` kubectl apply -f https://git.io/weave-kube daemonset "weave-net" created ``` ## 4.2 查看系统服务状态 ``` # kube-dns 必须配置完网络才能 Running [root@k8s-master ~]#kubectl get pods --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGE kube-system dummy-2088944543-io6ca 1/1 Running 0 22m kube-system etcd-k8s-master 1/1 Running 0 22m kube-system kube-apiserver-k8s-master 1/1 Running 0 22m kube-system kube-controller-manager-k8s-master 1/1 Running 0 20m kube-system kube-discovery-982812725-rm6ut 1/1 Running 0 22m kube-system kube-dns-2247936740-htw22 3/3 Running 0 21m kube-system kube-proxy-amd64-lo0hr 1/1 Running 0 15m kube-system kube-proxy-amd64-t3qpn 1/1 Running 0 15m kube-system kube-proxy-amd64-wwj2z 1/1 Running 0 21m kube-system kube-scheduler-k8s-master 1/1 Running 0 21m kube-system weave-net-6k3ha 2/2 Running 0 11m kube-system weave-net-auf0c 2/2 Running 0 11m kube-system weave-net-bxj6d 2/2 Running 0 11m ``` ## 4.3 配置 flannel 网络 ``` # 必须使用 --pod-network-cidr 指定网段(10.244.0.0/16 是因为 kube-flannel.yml 文件里面写了这个网段) kubeadm init --api-advertise-addresses 10.6.0.140 --use-kubernetes-version v1.4.5 --pod-network-cidr 10.244.0.0/16 ``` ``` # 导入yml文件 kubectl create -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml ``` ## 4.4 其他主机控制集群 ``` # 备份master节点的 配置文件 /etc/kubernetes/admin.conf # 保存至 其他电脑, 通过执行配置文件控制集群 kubectl --kubeconfig ./admin.conf get nodes ``` ## 4.5 配置dashboard ``` #下载 yaml 文件, 直接导入会去官方拉取images curl -O https://rawgit.com/kubernetes/dashboard/master/src/deploy/kubernetes-dashboard.yaml #编辑 yaml 文件 vi kubernetes-dashboard.yaml image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.4.0 修改为 image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.4.1 imagePullPolicy: Always 修改为 imagePullPolicy: IfNotPresent ``` ``` kubectl create -f ./kubernetes-dashboard.yaml deployment "kubernetes-dashboard" created service "kubernetes-dashboard" created ``` ``` # 查看 NodePort ，既外网访问端口 kubectl describe svc kubernetes-dashboard --namespace=kube-system NodePort: 31736/TCP ``` ``` # 访问 dashboard http://localhost:31736 ``` ![此处输入图片的描述][1] # FAQ: ## kube-discovery error ``` failed to create "kube-discovery" deployment [deployments.extensions "kube-discovery" already exists] systemctl stop kubelet; docker rm -f -v $(docker ps -q); find /var/lib/kubelet | xargs -n 1 findmnt -n -t tmpfs -o TARGET -T | uniq | xargs -r umount -v; rm -r -f /etc/kubernetes /var/lib/kubelet /var/lib/etcd; systemctl start kubelet kubeadm init ``` [1]: https://jicki.cn/img/posts/kubernetes/1.png