k8s二进制部署系列06-配置kubectl程序

1.1 部署并分发k8s程序文件

cd /server/tools/
tar xf kubernetes-server-linux-amd64.tar.gz

scp kubernetes/server/bin/{kube-apiserver,kube-controller-manager,kube-scheduler,kubectl} 192.168.10.161:/opt/kubernetes/bin/
scp kubernetes/server/bin/{kube-apiserver,kube-controller-manager,kube-scheduler,kubectl} 192.168.10.162:/opt/kubernetes/bin/
scp kubernetes/server/bin/{kubelet,kube-proxy,kubectl,kubeadm} 192.168.10.163:/opt/kubernetes/bin/
scp kubernetes/server/bin/{kubelet,kube-proxy,kubectl,kubeadm} 192.168.10.164:/opt/kubernetes/bin/

1.2 创建kubectl.kubeconfig配置文件

cd /etc/ssl/

kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://192.168.10.160:8443 \     # 此处为master节点的VIP
  --kubeconfig=kubectl.kubeconfig

kubectl config set-credentials admin \
  --client-certificate=/opt/kubernetes/ssl/admin.pem \
  --client-key=/opt/kubernetes/ssl/admin-key.pem \
  --embed-certs=true \
  --kubeconfig=kubectl.kubeconfig

kubectl config set-context kubernetes \
  --cluster=kubernetes \
  --user=admin \
  --kubeconfig=kubectl.kubeconfig

kubectl config use-context kubernetes --kubeconfig=kubectl.kubeconfig

• 说明：
• --certificate-authority：验证 kube-apiserver 证书的根证书
• --client-certificate、--client-key：刚生成的admin 证书和私钥，连接 kube-apiserver 时使用
• --embed-certs=true：将pem 和 admin.pem 证书内容嵌入到生成的 kubectl.kubeconfig 文件中(不加时，写入的是证书文件路径)

1.3 分发配置文件

mkdir -p ~/.kube        # 所有k8s节点创建此目录
scp kubectl.kubeconfig 192.168.10.161:~/.kube/config
scp kubectl.kubeconfig 192.168.10.162:~/.kube/config
scp kubectl.kubeconfig 192.168.10.163:~/.kube/config
scp kubectl.kubeconfig 192.168.10.164:~/.kube/config

• 说明：
• 如果执行 kubectl 命令式时输出如下错误信息，则说明使用的~/.kube/config 文件不对，请切换到正确的账户后再执行该命令：

The connection to the server localhost:8080 was refused - did you specify the right host or port