Technical Writing for DevOps Documentation

Introduction:In this technical guide, we will walk through the process of deploying a Python application on Kubernetes using Oracle Cloud Infrastructure (OCI). We will leverage Terraform, an infrastructure as code tool, to manage the required resources on OCI.

Prerequisites:Before proceeding with this guide, ensure you have the following prerequisites:

An OCI account with appropriate access and permissions.

A Python application that you want to deploy on Kubernetes.

Basic knowledge of Kubernetes and Terraform.

Log in to your OCI account and navigate to the Console.

Create a new compartment or choose an existing one to organize your resources.

Create a Virtual Cloud Network (VCN) with a subnet to host your Kubernetes cluster.

Set up security lists, routing, and other necessary configurations to ensure proper network connectivity.

Install and configure the Oracle Cloud Infrastructure CLI (OCI CLI) on your local machine.

Use the OCI CLI to create an OCI Container Engine for Kubernetes (OKE) cluster in your chosen subnet.

Verify the successful creation of the cluster by checking its status and accessing the Kubernetes API server.

Prepare your Python application for deployment on Kubernetes. Ensure it is containerized using Docker or another containerization tool.

Create Kubernetes manifest files (in YAML format) that define the necessary Kubernetes resources, such as Deployments, Services, and ConfigMaps, for your application.

Use kubectl, the Kubernetes command-line tool, to deploy your application to the OKE cluster. Ensure that you specify the appropriate namespace and resource configurations.

Verify the deployment by checking the status of the deployed resources and accessing the application from a browser or using curl commands.

Install Terraform on your local machine and initialize a new Terraform project.

Define the necessary OCI resources (e.g., VCN, subnet, OKE cluster) as Terraform configuration files (in HCL format).

Configure the OCI provider in Terraform using your OCI credentials and specify the desired resource configurations.

Run the Terraform commands to plan and apply the infrastructure changes. Terraform will create, modify, or delete the necessary resources on OCI based on your configuration.

Validate the successful creation of the infrastructure by checking the OCI Console or using OCI CLI commands.

Conclusion:By following this guide, you have successfully deployed your Python application on Kubernetes using Oracle Cloud Infrastructure (OCI) and managed the required infrastructure using Terraform. This approach provides scalability, flexibility, and ease of management for your application in a cloud-native environment.