kubeconfig是用于在node节点上kubelet和kube-proxy访问集群的认证。
以下操作在master上进行，然后到时候再统一分发到node节点上
kubernetes安装包下载，下载后然后解压
下载地址https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.12.md
mkdir k8s_download
cd k8s_download
wget https://dl.k8s.io/v1.12.2/kubernetes-server-linux-amd64.tar.gz
下载地址https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.12.md mkdir k8s_download cd k8s_download wget https://dl.k8s.io/v1.12.2/kubernetes-server-linux-amd64.tar.gz 解压后可以看到有这些文件 [root@k8s-master-101 bin]# pwd /root/k8s_download/kubernetes/server/bin [root@k8s-master-101 bin]# ls apiextensions-apiserver kube-apiserver.docker_tag kube-proxy.docker_tag cloud-controller-manager kube-apiserver.tar kube-proxy.tar cloud-controller-manager.docker_tag kube-controller-manager kube-scheduler cloud-controller-manager.tar kube-controller-manager.docker_tag kube-scheduler.docker_tag hyperkube kube-controller-manager.tar kube-scheduler.tar kubeadm kubelet mounter kube-apiserver kube-proxy
在master上下载kubectl
cd k8s_download/kubernetes/server/bin/ chmod +x kubectl mv kubectl /opt/kubernetes/bin
创建 TLS Bootstrapping Token，即token.csv文件。TLS Bootstrapping Token用于引导kubelet自动生成证书。
export BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ') cat > token.csv <<EOF ${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap" EOF cp token.csv /opt/kubernetes/ssl/ cd /opt/kubernetes/ssl/ [root@k8s-master-101 ssl]# cat token.csv 427699856e2f019164f5d0b61bbb8195,kubelet-bootstrap,10001,"system:kubelet-bootstrap" 其中涉及到RBAC的知识。它表示使用kubelet-bootstrap并拥有10001权限，通过kubelet-bootstrap用户组使用第一个随机字符串来访问k8s集群。
创建bootstrap.kubeconfig，这个文件是用于kubelet自动签发证书的。
#首先指定kube-api访问入口，即master ip export KUBE_APISERVER=https://10.0.0.101:6443 #设置集群参数 kubectl config set-cluster kubernetes \ --certificate-authority=/opt/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${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
执行完后将生成bootstrap.kubeconfig文件
[root@k8s-master-101 ssl]# cat bootstrap.kubeconfig
apiVersion: v1 clusters: - cluster: certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUR4RENDQXF5Z0F3SUJBZ0lVVFcwZFhZMEZBWEdvcFppcXE1N05JQTIvWGlZd0RRWUpLb1pJaHZjTkFRRUwKQlFBd2FERUxNQWtHQTFVRUJoTUNRMDR4RWpBUUJnTlZCQWdUQ1VkMVlXNW5lbWh2ZFRFUk1BOEdBMVVFQnhNSQpVMmhsYm5wb1pXNHhEREFLQmdOVkJBb1RBMnM0Y3pFUE1BMEdBMVVFQ3hNR1UzbHpkR1Z0TVJNd0VRWURWUVFECkV3cHJkV0psY201bGRHVnpNQjRYRFRFNU1ETXdOekUyTVRRd01Gb1hEVEkwTURNd05URTJNVFF3TUZvd2FERUwKTUFrR0ExVUVCaE1DUTA0eEVqQVFCZ05WQkFnVENVZDFZVzVuZW1odmRURVJNQThHQTFVRUJ4TUlVMmhsYm5wbwpaVzR4RERBS0JnTlZCQW9UQTJzNGN6RVBNQTBHQTFVRUN4TUdVM2x6ZEdWdE1STXdFUVlEVlFRREV3cHJkV0psCmNtNWxkR1Z6TUlJQklqQU5CZ2txaGtpRzl3MEJBUUVGQUFPQ0FROEFNSUlCQ2dLQ0FRRUFzZmQ2NDRiV3RHNEsKYTZJS052bXg0RWZReHl1czVPQy9kUkZVRng0eE1iakV3eGVWbXRiUXh0cEV0TWs1UVMxMXpFNmdIcUhRWXFuMQpMOXVjVG5NZUZVYmJDaTBITXVOTFdSUGpJWmtnNzRuTnV3VlBkSjYvYkZPL21qSFd1Q2gzY2xWdE9tNGg1by9IClFZZkdWR2VIeWFXL3kvWW5IbzFWaHZWMlJONTJNTHRoUG0rVUtLQTlLeUJIUVJKWURKbXVoV2owUDJ4R01vVmkKd3VaU0tiT0c2R2xFeUxoRlNjbEd2d0FtNjRrL3RPMDVwZ0tZWHZtbmg2S0UwelhHVzR5M3BMYVZrMmhkc3RNWgpvM3hjTkZab0tlei9XbzdSZXR2enA1UFNLYnBkNTB5UTZ6MDhvaE56UlJhL2xXRWFxa0xUbndhT0ZRekhMQk5KCjE2WHh5T0RzZVFJREFRQUJvMll3WkRBT0JnTlZIUThCQWY4RUJBTUNBUVl3RWdZRFZSMFRBUUgvQkFnd0JnRUIKL3dJQkFqQWRCZ05WSFE0RUZnUVVPejBPN2RKSUdBbXRUbkxOaWh5TFZWbkNIY1F3SHdZRFZSMGpCQmd3Rm9BVQpPejBPN2RKSUdBbXRUbkxOaWh5TFZWbkNIY1F3RFFZSktvWklodmNOQVFFTEJRQURnZ0VCQUlSbndCT0hEdldyCjdmNFJGa3VzZXpVa25uWkRvYzZEOStIalF4YXJHYitFd2ZrZWNqUjkwOStOUjI4bUVmeDB3eXhRVkwwUjJrT28KRXFPOGtVc252eGxZdXZ4S1NiZHNhYTdTTEU2YS9mcHc3OTUxUzdSRDZEbktYREpMVENTZHRSRityeHBYYlBJUgp1WVVrVml1YndudU16VlMwRXZFSG1KcDNVTC9jVkFMYnJiV3JQVXkzellQM1J4ZXpEUTE0N2ZVajBFd3FLUTFWClNVRkRFNXkyTmRZZCtnbHV3MHRRRll2VlJBOWp1UjgvYnFYNVZLWHVublNLKzNEZVlKcGtTelU1dzlrcmhOUWQKTFZuQzBpdyttUm4zTm80WWpsdkR1eWJGeTdVSTJwV0w2aFg1c29SRlA4N2tyWEF2THgxcHNHdDFYYytYcmhVVwpkazlxMlF3bVVuQT0KLS0tLS1FTkQgQ0VSVElGSUNBVEUtLS0tLQo= server: https://10.0.0.101:6443 name: kubernetes contexts: - context: cluster: kubernetes user: kubelet-bootstrap name: default current-context: default kind: Config preferences: {} users: - name: kubelet-bootstrap user: token: 427699856e2f019164f5d0b61bbb8195
创建节点要用的kube-proxy kubeconfig文件
# 设置集群参数 kubectl config set-cluster kubernetes \ --certificate-authority=/opt/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=kube-proxy.kubeconfig # 设置客户端认证参数 kubectl config set-credentials kube-proxy \ --client-certificate=/opt/kubernetes/ssl/kube-proxy.pem \ --client-key=/opt/kubernetes/ssl/kube-proxy-key.pem \ --embed-certs=true \ --kubeconfig=kube-proxy.kubeconfig # 设置上下文参数 kubectl config set-context default \ --cluster=kubernetes \ --user=kube-proxy \ --kubeconfig=kube-proxy.kubeconfig # 设置默认上下文 kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
最后生成了两个kubeconfig文件
[root@k8s-master-101 ssl]# ls *config bootstrap.kubeconfig kube-proxy.kubeconfig