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Generating Kubeconfigs for a New Kubernetes Cluster
To set up a new Kubernetes cluster from scratch, we need to provide various components of the cluster with kubeconfig files so that they can locate and authenticate with the Kubernetes API. In this learning activity, you will generate a set of kubeconfigs that can be used to build a Kubernetes cluster.
Path Info
Table of Contents
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Challenge
Generate kubelet kubeconfigs for each worker node.
To complete this task, generate a kubelet kubeconfig for each worker node. You can do so like this:
KUBERNETES_PUBLIC_ADDRESS=172.34.2.0 for instance in worker0.mylabserver.com worker1.mylabserver.com; 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=${instance}.kubeconfig done -
Challenge
Generate a kube-proxy kubeconfig.
To complete this task, generate a kubeconfig for kube-proxy. You can do so like this:
KUBERNETES_PUBLIC_ADDRESS=172.34.2.0 { kubectl config set-cluster kubernetes-the-hard-way --certificate-authority=ca.pem --embed-certs=true --server=https://${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 } -
Challenge
Generate a kube-controller-manager kubeconfig.
To complete this task, generate a kubeconfig for kube-controller-manager. You can do so like this:
{ 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 } -
Challenge
Generate a kube-scheduler kubeconfig.
To complete this task, generate a kubeconfig for kube-scheduler. You can do so like this:
{ 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 } -
Challenge
Generate an admin kubeconfig.
To complete this task, generate a kubeconfig for the admin user. You can do so like this:
{ 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 }
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