Skip to main content

Complete DevOps and SDLC Tutorial for Beginners | What is DEVOPS | What is SDLC

 

✅ Complete DevOps and SDLC Tutorial for Beginners

1. What is DevOps?

  • Definition:
    DevOps stands for Development and Operations.
    It is a culture and practice that combines software development (Dev) and IT operations (Ops) to shorten the development lifecycle and deliver high-quality software continuously.

  • Purpose:
    DevOps automates the software deployment process using CI/CD pipelines, eliminating manual deployment steps.

  • Key Benefits:

    • Faster software delivery.

    • Improved collaboration between teams.

    • Reduced risk of deployment failures.

    • Continuous improvement and feedback loop.

CI/CD in DevOps

  • CI (Continuous Integration):

    • Developers integrate code frequently into a shared repository (e.g., GitHub).

    • Automated build and test process after every integration.

  • CD (Continuous Deployment/Delivery):

    • Continuous Delivery: Automatically deploys code to a staging environment after passing tests.

    • Continuous Deployment: Deploys code directly to production without manual intervention.

Role of a DevOps Engineer

  • Acts as a bridge between:

    • Developers → who write the code.

    • QA → who test the code.

    • Networking & Server Admin → who manage infrastructure.

    • Support Team → who ensure system stability.

  • Main responsibility: Automate processes, create CI/CD pipelines, and manage cloud/infrastructure.


2 DevOps Lifecycle



The DevOps process includes:

  1. Plan: Requirement analysis & sprint planning.

  2. Code: Develop software using Git, IDEs.

  3. Build: Compile and package code (e.g., Maven, Gradle).

  4. Test: Automated testing using tools like Selenium.

  5. Release: Deploy to production environment.

  6. Deploy: Continuous Deployment with Jenkins, Docker.

  7. Operate: Application runs on servers/cloud.

  8. Monitor: Monitor performance using Prometheus, Grafana.

3. What is SDLC?

  • Definition:
    SDLC stands for Software Development Life Cycle.
    It is a step-by-step process to develop software in a structured way.

Phases of SDLC

  1. Requirement Gathering

  2. Design

  3. Development

  4. Testing

  5. Deployment

  6. Maintenance

Popular Models of SDLC

  • Waterfall Model

  • V-Model

  • Spiral Model

  • Agile Model (Most Preferred Today)

Agile Model

  • Works on small planning using Sprints (short development cycles).

  • Scrum Team:

    • Scrum Master → Facilitates the team.

    • Developers, QA, DevOps → Implement and test features.

    • End User/Product Owner → Provides feedback.

  • Stand-up Meetings: Daily 15-minute meetings to discuss progress, blockers, and plans.

4. Tools Used in DevOps

a) Code Management

  • Git: Distributed version control system.

  • GitHub: Remote repository for storing code and collaborating.

b) Build Automation

  • Maven, Gradle, or Ant.

c) CI/CD Tools

  • Jenkins, GitLab CI, Azure DevOps, CircleCI.

d) Configuration Management

  • Ansible, Chef, Puppet.

e) Containerization

  • Docker, Kubernetes.

f) Monitoring

  • Prometheus, Grafana, Nagios.

5. Simple DevOps Workflow

  1. Developer writes code → pushes to GitHub.

  2. CI Tool (Jenkins) detects changes → runs build → tests code.

  3. Code deployed automatically to Staging Server.

  4. After approval → deployed to Production Server.

6. Quick Hands-On (Beginner Exercise)

✅ Install Git
✅ Create GitHub Repository
✅ Push Code from Local to GitHub
✅ Install Jenkins (on local or cloud)
✅ Create a simple CI/CD pipeline using Jenkins

Labels:

Comments

Post a Comment

POST Answer of Questions and ASK to Doubt

Popular posts from this blog

Uncontrolled form input in React-JS

  Uncontrolled form input in React-JS? If we want to take input from users without any separate event handling then we can uncontrolled the data binding technique. The uncontrolled input is similar to the traditional HTML form inputs. The DOM itself handles the form data. Here, the HTML elements maintain their own state that will be updated when the input value changes. To write an uncontrolled component, you need to use a ref to get form values from the DOM. In other words, there is no need to write an event handler for every state update. You can use a ref to access the input field value of the form from the DOM. Example of Uncontrolled Form Input:- import React from "react" ; export class Info extends React . Component {     constructor ( props )     {         super ( props );         this . fun = this . fun . bind ( this ); //event method binding         this . input = React . createRef ();...
Post a Comment
Read more

JDBC using JSP and Servlet

JDBC means Java Database Connectivity ,It is intermediates from Application to database. JDBC has different type of divers and provides to communicate from database server. JDBC contain four different type of approach to communicate with Database Type 1:- JDBC-ODBC Driver Type2:- JDBC Vendor specific Type3 :- JDBC Network Specific Type4:- JDBC Client-Server based Driver  or JAVA thin driver:- Mostly we prefer Type 4 type of Driver to communicate with database server. Step for JDBC:- 1  Create Database using MYSQL ,ORACLE ,MS-SQL or any other database 2   Create Table using database server 3   Create Form according to database table 4  Submit Form and get form data into servlet 5  write JDBC Code:-     5.1)   import package    import java.sql.*     5.2)  Add JDBC Driver according to database ide tools     5.3)  call driver in program         ...
4 comments
Read more

JSP Page design using Internal CSS

  JSP is used to design the user interface of an application, CSS is used to provide set of properties. Jsp provide proper page template to create user interface of dynamic web application. We can write CSS using three different ways 1)  inline CSS:-   we will write CSS tag under HTML elements <div style="width:200px; height:100px; background-color:green;"></div> 2)  Internal CSS:-  we will write CSS under <style> block. <style type="text/css"> #abc { width:200px;  height:100px;  background-color:green; } </style> <div id="abc"></div> 3) External CSS:-  we will write CSS to create a separate file and link it into HTML Web pages. create a separate file and named it style.css #abc { width:200px;  height:100px;  background-color:green; } go into Jsp page and link style.css <link href="style.css"  type="text/css" rel="stylesheet"   /> <div id="abc"> </div> Exam...
Post a Comment
Read more