How to Connect Oracle Kubernetes?

Oracle Kubernetes Engine (OKE) is a powerful container orchestration platform that allows you to deploy, manage, and scale containerized applications. Connecting to Oracle Kubernetes is a crucial step in harnessing its capabilities. In this article, we will guide you through the process of connecting to Oracle Kubernetes, providing step-by-step instructions and relevant commands.

Prerequisites:

Before we dive into connecting to Oracle Kubernetes, ensure that you have the following prerequisites in place:

1. Oracle Cloud Account: You need access to Oracle Cloud Infrastructure (OCI) and an active account.

2. OCI CLI Installed: Make sure you have the Oracle Cloud Infrastructure Command Line Interface (OCI CLI) installed on your local machine. You can download it from the official Oracle website.

3. Kubectl Installed: Kubectl is the Kubernetes command-line tool. Install it on your machine to interact with your Kubernetes clusters.

Step 1: Obtain Oracle Cloud Infrastructure Configuration File

To connect to Oracle Kubernetes, you'll need to generate a configuration file that contains the necessary credentials and connection details. Follow these steps:

oci setup config

This command will guide you through the configuration setup process. Make sure to select the correct region and compartment.

Step 2: Set Up OCI CLI for Kubernetes

Now, configure the OCI CLI to enable communication with Oracle Kubernetes. Execute the following commands:

oci ce cluster create-kubeconfig --cluster-id <your-cluster-id> --file ~/.kube/config --region <your-region>

Replace <your-cluster-id> and <your-region> with your actual cluster ID and the Oracle Cloud region where your cluster is deployed.

Step 3: Verify Kubernetes Configuration

Ensure that the Kubernetes configuration is set up correctly. Run the following command:

kubectl cluster-info

This command should display information about your Kubernetes cluster, indicating a successful connection.

Step 4: Access Oracle Kubernetes Dashboard

To access the Oracle Kubernetes Dashboard, execute the following commands:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0/aio/deploy/recommended.yaml
kubectl proxy

Now, open your web browser and navigate to http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/.

Step 5: Authenticate to the Dashboard

To log in to the Oracle Kubernetes Dashboard, you need to obtain a token. Run the following command:

kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')

Copy the token and paste it into the dashboard login page.

More Examples:

Example 1: Deploying a Sample Application

Now that you're connected, let's deploy a sample application. Use the following command:

kubectl apply -f <path-to-your-application-yaml>

Replace <path-to-your-application-yaml> with the actual path to your application's YAML file.

Example 2: Scaling Your Deployment

To scale your deployment, use the following command:

kubectl scale deployment <deployment-name> --replicas=<number-of-replicas>

Replace <deployment-name> with the name of your deployment and <number-of-replicas> with the desired number.

Congratulations! You have successfully connected to Oracle Kubernetes and explored some basic commands. This is just the beginning of your journey into container orchestration with OKE. Experiment, deploy applications, and scale your infrastructure as needed.