DevOps Overview

M. T. H. TitumirM. T. H. Titumir
4 min read

Table of contents

✅ What is DevOps?

DevOps is a combination of Development (Dev) and Operations (Ops).
It's a set of practices, cultural philosophies, and tools that aim to:

  • Bridge the gap between software development and IT operations.

  • Enable faster, more reliable software delivery.

  • Promote automation, collaboration, and continuous improvement.

📌 Key Goals of DevOps:

  • Shorten development cycles

  • Increase deployment frequency

  • Improve product quality

  • Enable rapid and reliable releases

🚀 Core DevOps Practices:

PracticePurpose
CI/CD (Continuous Integration & Deployment)Automate testing & deployment pipelines
Infrastructure as Code (IaC)Provision infrastructure using code (e.g., Terraform)
Monitoring & LoggingTrack performance & detect issues early
Collaboration & CommunicationImprove teamwork between Dev & Ops
AutomationReduce manual tasks & increase efficiency

👨‍💻 Roles & Responsibilities of a DevOps Engineer

A DevOps Engineer is responsible for streamlining the software delivery process, from development to production.

🔧 Core Responsibilities:

  1. CI/CD Pipeline Management

    • Set up automated build, test, and deploy pipelines using tools like GitHub Actions, Jenkins, GitLab CI.

  2. Infrastructure Automation

    • Use Infrastructure as Code (IaC) tools like Terraform, Ansible, or CloudFormation to automate server provisioning.

  3. Cloud Management

    • Work with cloud platforms like AWS, Azure, or GCP to deploy and manage infrastructure.

  4. Monitoring & Logging

    • Set up tools like Prometheus, Grafana, ELK stack to monitor application health and logs.

  5. Configuration Management

    • Use tools like Ansible, Chef, or Puppet to manage configuration consistency.

  6. Containerization & Orchestration

    • Use Docker and Kubernetes to package and run applications consistently across environments.

  7. Collaboration & Security

    • Work closely with developers and security teams to ensure secure, fast, and reliable software delivery.

📘 Summary Table

AreaTools/Skills Involved
CI/CDGitHub Actions, Jenkins, GitLab CI, CircleCI
IaCTerraform, Ansible, CloudFormation
Cloud PlatformsAWS, Azure, GCP
ContainersDocker, Kubernetes
MonitoringPrometheus, Grafana, ELK, Datadog
Version ControlGit, GitHub/GitLab
ScriptingBash, Python, PowerShell
Collaboration ToolsJira, Slack, Confluence

✅ What is SDLC?

Software Development Life Cycle (SDLC) is the process followed to design, develop, test, and deploy software. It includes the following phases:

  1. Planning

  2. Requirements

  3. Design

  4. Development

  5. Testing

  6. Deployment

  7. Maintenance

🔄 How DevOps Fits into Each Phase of SDLC

SDLC PhaseDevOps RoleTools & Practices
1. PlanningInvolve DevOps early to estimate infrastructure and deployment needs.Agile Planning, Jira, Confluence
2. RequirementsCollaborate with Devs & Ops to define system-level requirements (e.g., scalability, reliability).Confluence, Slack, GitHub Discussions
3. DesignDefine CI/CD pipelines, infrastructure architecture, containerization strategy.Draw.io, Lucidchart, Infrastructure Diagrams
4. DevelopmentEnable rapid iteration using CI tools and Git branching strategies.GitHub, GitLab, GitHub Actions, Jenkins
5. TestingAutomate unit, integration, and acceptance testing in pipelines.Selenium, JUnit, Jest, GitHub Actions
6. DeploymentAutomate deployments to staging/production using CI/CD pipelines.Docker, Kubernetes, Terraform, Helm
7. MaintenanceMonitor systems, collect logs, handle rollbacks and scaling.Prometheus, Grafana, ELK Stack, Datadog

🧠 DevOps Adds These Key Elements to SDLC

ConceptImpact on SDLC
AutomationReduces human error and speeds up release cycles.
Continuous Integration (CI)Ensures code is integrated and tested frequently.
Continuous Delivery/Deployment (CD)Automates deployment of new features and fixes.
Monitoring & FeedbackProvides visibility into production performance and user experience.
Collaboration & CommunicationBridges Dev, QA, and Ops teams to eliminate silos.

🚀 DevOps Transforms SDLC From:

sqlCopyEditWaterfall-like, siloed processes ➝ Agile, collaborative, automated pipelines.

✅ Visual Summary (DevOps in SDLC Flow)

Traditional SDLC:
Plan → Design → Develop → Test → Deploy → Maintain

DevOps-Enabled SDLC:
Plan ↔ Code ↔ Build ↔ Test ↔ Release ↔ Deploy ↔ Operate ↔ Monitor ↔ Feedback

(Continuous, iterative, and automated!)

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Written by

M. T. H. Titumir
M. T. H. Titumir

🚀 Curious mind | Problem solver 📚 Learning & creating 👀 Observing the world, one thought at a time