📌 What is DevOps?

DevOps is a set of practices that combines software development (Dev) and IT operations (Ops) with the goal of shortening the software development life cycle and delivering high-quality applications continuously.

DevOps is not a tool or a single methodology—it's a culture shift that emphasizes:

• Collaboration

• Automation

• Continuous integration and delivery

• Monitoring and feedback

🎯 Why DevOps?

Traditional software development models (like Waterfall) create silos between teams. Developers write code, and operations teams deploy and maintain it—often leading to miscommunication, delays, and bugs.

DevOps aims to:

• Reduce deployment time

• Increase deployment frequency

• Improve recovery times from failures

• Promote a shared responsibility for the product

🛠️ Key DevOps Practices

1. Continuous Integration (CI)

Developers frequently merge code changes into a shared repository. Each integration is automatically tested.

Tools: Jenkins, GitHub Actions, GitLab CI

2. Continuous Delivery/Deployment (CD)

Automates the release of validated code to production or staging environments.

Tools: Spinnaker, ArgoCD, CircleCI

3. Infrastructure as Code (IaC)

Manage infrastructure (servers, networks, etc.) with configuration files instead of manual processes.

Tools: Terraform, Ansible, Puppet

4. Monitoring and Logging

Track system metrics, logs, and user behavior to detect and resolve issues quickly.

Tools: Prometheus, Grafana, ELK Stack (Elasticsearch, Logstash, Kibana)

5. Version Control

All code, scripts, and configs should be versioned and traceable.

Tools: Git (GitHub, GitLab, Bitbucket)

🧪 Sample DevOps Workflow

1. Code: Developer pushes code to Git

2. Build: Jenkins builds the code and runs tests

3. Test: Automated testing suite validates the changes

4. Release: If tests pass, code is deployed to staging

5. Deploy: After review, it's pushed to production (automatically or manually)

6. Monitor: Logs and metrics are monitored for issues