一、查看集群状态
1.1 生成 kubectl 连接集群的证书:
bash
#切换到证书工作目录
cd /root/TSL/k8s
# 申请证书文件
cat > admin-csr.json <<EOF
{
"CN": "admin",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
# 生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
2.1 生成 kubeconfig 文件
bash
mkdir /root/.kube
# k8s默认的配置文件目录
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://192.168.1.20:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials cluster-admin \
--client-certificate=/opt/kubernetes/ssl/admin.pem \
--client-key=/opt/kubernetes/ssl/admin-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=cluster-admin \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
2.3 查看k8s集群组件状态
bash
kubectl get cs
输出:
2.4 授权 kubelet-bootstrap 用户允许请求证书
bash
kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap