DevOps Classroom notes 01/Dec/2024

Azure DevOps

Azure DevOps offers comprehensive tools to manage ALM (Application Lifecycle Management)
Azure DevOps offers
- Project Management
  - Scrum Boards
  - Product Backlogs
  - Releases or iterations
- Test and Defect Management:
  - Test Case Management
  - Defects
  - Automated Test Execution
- Version Control System
  - Git
  - TFVC (Team foundation Version Control)
- Wiki pages:
  - Documentation
- Pipeline
  - Classic Pipelines
  - YAML Pipelines
- Artifact Management
- Environments
Azure DevOps Basic Organizational Structure
- Organization: This represents an organization or organizational unit
- Project: This represents a project. An organization can have multiple projects. While creating the project we can select the SDLC model (Agile, ITIL, Scrum)
- Source Repos: Each Project can have multiple Azure Source Repos (Git Repositories)
- Pipelines: Each Repo can be used to create multiple pipelines
Azure DevOps Models
- Azure DevOps Server:
  - This software can be installed on Windows server and azure devops can be used
  - This can be run on-premises or self-hosted
- Azure DevOps:
  - This a cloud hosted service
Azure DevOps Server Plans
- Express: This is free version
- Paid: This requires a license
Azure DevOps Services:
- Plans
Azure DevOps Services Account creation options
- Use Microsoft account or github to start free

Create an empty repository in Azure DevOps
now copy the repo url
now cd into the folder where you have already cloned from some other version control

Azure DevOps pipeline execution happens based on configured triggers such as push or PR or on schedule
Pipeline has to be execute on some system, These systems are referred as agents. Azure DevOps support the following agent types
- self hosted agent:
  - This is physical or virtual machine maintained by your organiztion
  - an agent software will be installed on this system
  - Free plan ( 1 self hosted agent is free)
- Microsoft hosted agents:
  - This will be a virtual machine launched by azure devops when your pipeline is triggered
  - Azure DevOps provides multiple microsoft hosted agents
  - Each agent will have preinstalled software
  - Free plan: 1800 minutes per month is free
How to organize what has to be done ?
- Pipeline: This is collection of stages and trigger info
- Stages:
  - Collection of jobs
  - jobs can be executed in a sequential order or parallel
- Jobs:
  - collection of steps which can be run on same agent
- steps:
  - this is individual step in the CI/CD Pipeline
  - mvn clean package