OpenShift Learning Roadmap:

Stage 1: Understanding Containers

Introduction to Containers:

Learn the basic concepts of containers, including what they are, how they work, and their advantages.
Recommended Resource: Docker Overview

Docker Basics:

Dive into Docker, the most widely used containerization platform.
Learn how to create, run, and manage containers.
Recommended Resource: Docker Documentation

Stage 2: Introduction to Kubernetes

Understanding Kubernetes:

Get familiar with Kubernetes, the container orchestration system.
Learn about pods, services, deployments, and the basic architecture of Kubernetes.
Recommended Resource: Kubernetes Basics
Kubernetes Installation:

Set up a local Kubernetes cluster using tools like Minikube or kind for hands-on practice.

Stage 3: Getting Started with OpenShift

Introduction to OpenShift:

Understand what OpenShift is and how it extends Kubernetes.
Explore OpenShift’s features like Source-to-Image (S2I), Routes, and ImageStreams.
Recommended Resource: OpenShift Documentation
Installing OpenShift:

Install a local OpenShift cluster for development using tools like Red Hat CodeReady Containers.
Explore the OpenShift web console.
Recommended Resource: CodeReady Containers

Stage 4: OpenShift Application Deployment

Deploying Applications:

Learn how to deploy applications on OpenShift using the web console and command-line interface (CLI).
Understand the concept of projects and namespaces.
Recommended Resource: OpenShift Application Deployment
Building Container Images:

Explore OpenShift’s Source-to-Image (S2I) feature for building container images from source code.
Learn how to use Dockerfiles and OpenShift build configurations.
Recommended Resource: OpenShift Build and Deploy

Stage 5: Advanced OpenShift Topics

Scaling and Load Balancing:

Understand how to scale applications and manage load balancing in OpenShift.
Explore the Horizontal Pod Autoscaler (HPA) and Route features.
Recommended Resource: OpenShift Scaling Applications

Security in OpenShift:

Learn about security practices in OpenShift, including role-based access control (RBAC) and securing container images.
Explore OpenShift Security Context Constraints (SCC).
Recommended Resource: OpenShift Security

Stage 6: Continuous Integration and Deployment (CI/CD)

Integration with Jenkins:

Understand how to set up Jenkins pipelines for continuous integration and deployment on OpenShift.
Explore Jenkins plugins for OpenShift.
Recommended Resource: Jenkins on OpenShift

GitOps and ArgoCD:

Learn about GitOps principles and how to implement them using ArgoCD on OpenShift.
Explore continuous delivery with Git repositories.
Recommended Resource: ArgoCD on OpenShift

Stage 7: Monitoring and Logging

Monitoring with Prometheus:

Explore monitoring applications using Prometheus and Grafana in an OpenShift environment.
Learn about custom metrics and alerts.
Recommended Resource: OpenShift Monitoring

Logging with EFK Stack:

Set up the Elasticsearch-Fluentd-Kibana (EFK) stack for centralized logging in OpenShift.
Understand how to query and analyze logs.
Recommended Resource: OpenShift Logging

Stage 8: Certification and Further Learning

Certification Preparation:

Consider preparing for the Red Hat Certified Specialist in OpenShift Administration exam.
Practice hands-on scenarios and review documentation.
Recommended Resource: Red Hat Certified Specialist

Community Engagement:

Join the OpenShift community forums, mailing lists, and attend webinars or meetups.
Contribute to open-source projects related to OpenShift.

By following this roadmap, you’ll gradually build a solid understanding of OpenShift and container technologies, progressing from basic concepts to advanced topics. Hands-on practice and exploration of real-world scenarios are crucial at each step to reinforce your learning.