Kubernetes Access

Zero Trust Kubectl

End users of the Kubernetes cluster (e.g. developers etc.) are recommended to use the secure Zero Trust Kubectl service. Users can both the "web based shell" or "download the kubeconfig" to access the cluster using the Kubectl CLI from their laptops.

Direct Kubectl Access

Organizations may have requirements to provide "privileged administrators" to have direct Kubectl access to the cluster "bypassing" the zero trust kubectl channel. The instructions below describe how this works and how it can be set up.

Upstream Kubernetes Clusterk8s API Serverk8s Master NodeAdministratork8s API Serverk8s Master NodeAdministratorLocal Kubectl CLI and kubeconfig fileSSH to Master NodeKubectl CommandsResponsesEnd SSH Session

Step 1: SSH to Master Node

• Identify the name or IP address of K8s master Node
• SSH to the node using ssh command. For example, for the name node demo-node and ssh username ubuntu, run the below command

    ssh ubuntu@demo-node
    ```

For the users having key-value pair based authentication, specify the private key file using `-i` option as shown in the below example

ssh -i <privatekey_filename> ubuntu@demo-node
```

Step 2: Execute Kubectl Commands

Now the user is logged in and can run the kubectl commands. Ensure you have required permissions to execute the commands. Users can use sudo to run these commands as "root".

• Before running the kubectl commands, set the KUBECONFIG env variable pointing to the cluster's kubeconfig file.

    export KUBECONFIG=/root/.kube/config
    ```

- Now run the kubectl commands on this node. For example, to get list of pods, use the below command

kubectl get pods -A
```

Info

In order to use this "direct" Kubeconfig file outside the master nodes, replace the server endpoint details from "server: https://k8master.service.consul:6443" with the IP address of one of the master nodes. For example, " https://master_node_ip:6443".

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