Kubernetes v1.12/v1.13 二进制部署集群（HTTPS+RBAC）(4)

systemd管理schduler组件：

# cat /usr/lib/systemd/system/kube-scheduler.service [Unit] Description=Kubernetes Scheduler Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-scheduler ExecStart=/opt/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target

启动：

# systemctl daemon-reload # systemctl enable kube-scheduler # systemctl restart kube-scheduler 4.4 部署controller-manager组件

创建controller-manager配置文件：

# cat /opt/kubernetes/cfg/kube-controller-manager KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \ --v=4 \ --master=127.0.0.1:8080 \ --leader-elect=true \ --address=127.0.0.1 \ --service-cluster-ip-range=10.0.0.0/24 \ --cluster-name=kubernetes \ --cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \ --cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \ --root-ca-file=/opt/kubernetes/ssl/ca.pem \ --service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem"

systemd管理controller-manager组件：

# cat /usr/lib/systemd/system/kube-controller-manager.service [Unit] Description=Kubernetes Controller Manager Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-controller-manager ExecStart=/opt/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target

启动：

# systemctl daemon-reload # systemctl enable kube-controller-manager # systemctl restart kube-controller-manager

所有组件都已经启动成功，通过kubectl工具查看当前集群组件状态：

# /opt/kubernetes/bin/kubectl get cs NAME STATUS MESSAGE ERROR scheduler Healthy ok etcd-0 Healthy {"health":"true"} etcd-2 Healthy {"health":"true"} etcd-1 Healthy {"health":"true"} controller-manager Healthy ok

如上输出说明组件都正常。

5. 在Node节点部署组件

Master apiserver启用TLS认证后，Node节点kubelet组件想要加入集群，必须使用CA签发的有效证书才能与apiserver通信，当Node节点很多时，签署证书是一件很繁琐的事情，因此有了TLS Bootstrapping机制，kubelet会以一个低权限用户自动向apiserver申请证书，kubelet的证书由apiserver动态签署。

认证大致工作流程如图所示：

5.1 将kubelet-bootstrap用户绑定到系统集群角色 kubectl create clusterrolebinding kubelet-bootstrap \ --clusterrole=system:node-bootstrapper \ --user=kubelet-bootstrap 5.2 创建kubeconfig文件

在生成kubernetes证书的目录下执行以下命令生成kubeconfig文件：

# 创建kubelet bootstrapping kubeconfig BOOTSTRAP_TOKEN=674c457d4dcf2eefe4920d7dbb6b0ddc KUBE_APISERVER="https://192.168.31.63:6443" # 设置集群参数 kubectl config set-cluster kubernetes \ --certificate-authority=./ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=bootstrap.kubeconfig # 设置客户端认证参数 kubectl config set-credentials kubelet-bootstrap \ --token=${BOOTSTRAP_TOKEN} \ --kubeconfig=bootstrap.kubeconfig # 设置上下文参数 kubectl config set-context default \ --cluster=kubernetes \ --user=kubelet-bootstrap \ --kubeconfig=bootstrap.kubeconfig # 设置默认上下文 kubectl config use-context default --kubeconfig=bootstrap.kubeconfig #---------------------- # 创建kube-proxy kubeconfig文件 kubectl config set-cluster kubernetes \ --certificate-authority=./ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=kube-proxy.kubeconfig kubectl config set-credentials kube-proxy \ --client-certificate=./kube-proxy.pem \ --client-key=./kube-proxy-key.pem \ --embed-certs=true \ --kubeconfig=kube-proxy.kubeconfig kubectl config set-context default \ --cluster=kubernetes \ --user=kube-proxy \ --kubeconfig=kube-proxy.kubeconfig kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig # ls bootstrap.kubeconfig kube-proxy.kubeconfig

将这两个文件拷贝到Node节点/opt/kubernetes/cfg目录下。

5.2 部署kubelet组件

将前面下载的二进制包中的kubelet和kube-proxy拷贝到/opt/kubernetes/bin目录下。