![]() mv $HOME/.kube/config.new $HOME/.kube/config mv $HOME/.kube/config $HOME/.kube/config.old Now rename the old $HOME.kube/config file. The above command creates a merged config named config.new. Ensure you are running the command from the $HOME/.kube directory KUBECONFIG= config:dev_config:test_config kubectl config view -merge -flatten > config.new You can merge all the three configs into a single file using the following command. Lets assume you have three Kubeconfig files in the $HOME/.kube/ directory. To manage all clusters effectively using a single config, you can merge the other Kubeconfig files to the default $HOME/.kube/config file using the supported kubectl command. However, there are situations where you will be given a Kubeconfig file with limited access to connect to prod or non-prod servers. Usually, when you work with Kubernetes services like GKE, all the cluster contexts get added as a single file. ![]() kubectl get nodes -kubeconfig=$HOME/.kube/dev_cluster_configĪlso you can use, KUBECONFIG=$HOME/.kube/dev_cluster_config kubectl get nodes Merging Multiple Kubeconfig Files You can pass the Kubeconfig file with the Kubectl command to override the current context and KUBECONFIG env variable. KUBECONFIG=$HOME/.kube/dev_cluster_config Method 3: Using Kubeconfig File With Kubectl Where dev_cluster_config is the kubeconfig file name. ![]() You can set the variable using the following command. If you set this variable, it overrides the current cluster context. So wherever you are using the kubectl command from the terminal, the KUBECONFIG env variable should be available. You can set the KUBECONFIG environment variable with the kubeconfig file path to connect to the cluster. kubectl get nodes Method 2: Connect with KUBECONFIG environment variable To validate the cluster connectivity, you can execute the following kubectl command to list the cluster nodes. kubectl config use-context įor example, kubectl config use-context my-dev-cluster Step 4: Validate the Kubernetes cluster connectivity You can set that using the following command. Now you need to set the current context to your kubeconfig file. kubectl config get-contexts Step 3: Set the current context It will list the context name as the name of the cluster. You can list all the contexts using the following command. You can validate the Kubeconfig file by listing the contexts. Each config will have a unique context name (ie, the name of the cluster). You can have any number of kubeconfig in the. mv /path/to/kubeconfig ~/.kube Step 2: List all cluster contexts Replace /path/to/kubeconfig with your kubeconfig current path. By default, kubectl looks for the config file in the /.kube location. Kubectl interacts with the kubernetes cluster using the details available in the Kubeconfig file. Now follow the steps given below to use the kubeconfig file to interact with the cluster. If you don’t have the CLI installed, follow the instructions given here. To connect to the Kubernetes cluster, the basic prerequisite is the Kubectl CLI plugin. Method 1: Connect to Kubernetes Cluster With Kubeconfig Kubectl Context Now let’s take a look at all three ways to use the Kubeconfig file. ![]() ![]() Command-Line Reference: The current context has the least precedence over the inline config reference and env variable.Environment Variable: KUBECONFIG env variable overrides the current context.Kubectl Context: Kubeconfig with kubectl overrides all other configs.You can use the Kubeconfig in different ways and each way has its own precedence. token: Secret token of the user/service account.ĭifferent Methods to Connect Kubernetes Cluster With Kubeconfig File.user: name of the user/service account.server: Cluster endpoint (IP/DNS of the master node).It needs the following key information to connect to the Kubernetes clusters. The default location of the Kubeconfig file is $HOME/.kube/configĪlso, kubernetes cluster components like controller manager, scheduler and kubelet use the kubeconfig files to interact with the API server. When you use kubectl, it uses the information in the kubeconfig file to connect to the kubernetes cluster API. You might get this config file directly from the cluster administrator or from a cloud platform if you are using managed Kubernetes cluster. A Kubeconfig is a YAML file with all the Kubernetes cluster details, certificates, and secret token to authenticate the cluster. ![]()
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