How-to-connect-with-kubernetes

How to connect with Kubernetes cluster using Linux

This document provides a step-by-step guide on connecting to a Kubernetes cluster using Linux, including installing kubectl, configuring access with the kubeconfig file, and verifying cluster connection and pod status.

Prerequisites

• Access to the Utho Cloud UI.
• Access to the Kubernetes cluster provided by Utho Cloud.
• The kubeconfig file downloaded from the Utho Kubernetes cluster.
• A Linux-based system with administrative privileges.

Deployment Steps

Step 1: Installing kubectl Using Snap

The simplest way to install kubectl on your Linux system is by using Snap. Here’s how to do it:

1. Install kubectl via Snap:

Run the following command to install kubectl:

sudo sna p install kubectl --classic

2. Verify Installation version:

To verify that kubectl has been installed correctly,check the version of the client using the command below:

 kubectl version --client

Download the kubeconfig file from the Utho k8s cluster.

3. How to Transfer Cluster File:

If you want to transfer cluster file from one Linux system to another Linux system.

 sudo rsync -av kubeconfig_mks_$CLUSTERID.yaml root@<server-ip>:~/kubeconfig_mks_$CLUSTERID.yaml

Step 2: Configuring Access to Your Kubernetes

To access and manage your Kubernetes cluster, you need to configure kubectl with the cluster configuration file (kubeconfig).

1. Set the KUBECONFIG environment variable:

Assuming the Kubernetes config file is located at /root/kubeconfig_mks_$CLUSTERID.yaml, use the following command to point kubectl to the correct configuration file:

 export KUBECONFIG=/root/kubeconfig_mks_$CLUSTERID.yaml

2. Verify Cluster Connection:

To ensure you’re connected to the cluster, run:

 kubectl cluster-info

Step 3: Checking Running Pods in the Kubernetes

1. Check Pods:

To see the pods running in your Kubernetes cluster, use the following command:

 kubectl get nodes

 kubectl get pods --all-namespaces

This command will list all running pods in every namespace.

 kubectl get pods

This command will show staus of running pods.