配置生成配置

Last updated 10 months ago

本部分内容将会创建 kubeconfig 配置文件,它们是 Kubernetes 客户端与 API Server 认证与鉴权的保证。

客户端认证配置

本节将会创建用于 kube-proxykube-controller-managerkube-schedulerkubelet 的 kubeconfig 文件。

Kubernetes 公有 IP 地址

每一个 kubeconfig 文件都需要一个 Kuberntes API Server 的 IP 地址。为了保证高可用性,我们将该 IP 分配给 API Server 之前的外部负载均衡器。

查询 kubernetes-the-hard-way 的静态 IP 地址:

KUBERNETES_PUBLIC_ADDRESS=$(gcloud compute addresses describe kubernetes-the-hard-way \
--region $(gcloud config get-value compute/region) \
--format 'value(address)')

kubelet 配置文件

为了确保 Node Authorizer 授权,Kubelet 配置文件中的客户端证书必需匹配 Node 名字。

为每个 worker 节点创建 kubeconfig 配置:

for instance in worker-0 worker-1 worker-2; do
kubectl config set-cluster kubernetes-the-hard-way \
--certificate-authority=ca.pem \
--embed-certs=true \
--server=https://${KUBERNETES_PUBLIC_ADDRESS}:6443 \
--kubeconfig=${instance}.kubeconfig
kubectl config set-credentials system:node:${instance} \
--client-certificate=${instance}.pem \
--client-key=${instance}-key.pem \
--embed-certs=true \
--kubeconfig=${instance}.kubeconfig
kubectl config set-context default \
--cluster=kubernetes-the-hard-way \
--user=system:node:${instance} \
--kubeconfig=${instance}.kubeconfig
kubectl config use-context default --kubeconfig=${instance}.kubeconfig
done

结果将会生成以下 3 个文件:

worker-0.kubeconfig
worker-1.kubeconfig
worker-2.kubeconfig

kube-proxy 配置文件

为 kube-proxy 服务生成 kubeconfig 配置文件:

{
kubectl config set-cluster kubernetes-the-hard-way \
--certificate-authority=ca.pem \
--embed-certs=true \
--server=https://${KUBERNETES_PUBLIC_ADDRESS}:6443 \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials system: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-the-hard-way \
--user=system:kube-proxy \
--kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
}

kube-controller-manager 配置文件

{
kubectl config set-cluster kubernetes-the-hard-way \
--certificate-authority=ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:6443 \
--kubeconfig=kube-controller-manager.kubeconfig
kubectl config set-credentials system:kube-controller-manager \
--client-certificate=kube-controller-manager.pem \
--client-key=kube-controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=kube-controller-manager.kubeconfig
kubectl config set-context default \
--cluster=kubernetes-the-hard-way \
--user=system:kube-controller-manager \
--kubeconfig=kube-controller-manager.kubeconfig
kubectl config use-context default --kubeconfig=kube-controller-manager.kubeconfig
}

kube-scheduler 配置文件

{
kubectl config set-cluster kubernetes-the-hard-way \
--certificate-authority=ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:6443 \
--kubeconfig=kube-scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler \
--client-certificate=kube-scheduler.pem \
--client-key=kube-scheduler-key.pem \
--embed-certs=true \
--kubeconfig=kube-scheduler.kubeconfig
kubectl config set-context default \
--cluster=kubernetes-the-hard-way \
--user=system:kube-scheduler \
--kubeconfig=kube-scheduler.kubeconfig
kubectl config use-context default --kubeconfig=kube-scheduler.kubeconfig
}

Admin 配置文件

{
kubectl config set-cluster kubernetes-the-hard-way \
--certificate-authority=ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:6443 \
--kubeconfig=admin.kubeconfig
kubectl config set-credentials admin \
--client-certificate=admin.pem \
--client-key=admin-key.pem \
--embed-certs=true \
--kubeconfig=admin.kubeconfig
kubectl config set-context default \
--cluster=kubernetes-the-hard-way \
--user=admin \
--kubeconfig=admin.kubeconfig
kubectl config use-context default --kubeconfig=admin.kubeconfig
}

分发配置文件

kubeletkube-proxy kubeconfig 配置文件复制到每个 worker 节点上:

for instance in worker-0 worker-1 worker-2; do
gcloud compute scp ${instance}.kubeconfig kube-proxy.kubeconfig ${instance}:~/
done

adminkube-controller-managerkube-scheduler kubeconfig 配置文件复制到每个 controller 节点上:

for instance in controller-0 controller-1 controller-2; do
gcloud compute scp admin.kubeconfig kube-controller-manager.kubeconfig kube-scheduler.kubeconfig ${instance}:~/
done

下一步:配置和生成密钥