DevOps Fundamentals
Continuous Integration (CI):
Scenario: In a large organisation, multiple development teams are working on
different features of a software project. Each team commits code changes to a shared repository
several times a day.
Context: The CI system automatically triggers builds and tests whenever code
changes are committed. If any issues are detected during the automated tests, developers are
notified immediately, enabling them to address and fix the problems early in the development
process.
Continuous Delivery (CD):
Scenario: After successful CI, the organisation wants to ensure that the
software can be reliably deployed to various environments, including development, testing, and
production.
Context: The CD pipeline automates the process of deploying the application to
different environments. This ensures consistency and reduces the risk of deployment errors. In a
big organisation, CD pipelines may include multiple stages, such as testing, user acceptance
testing (UAT), and production deployment.
Infrastructure as Code (IaC):
Scenario: The organisation needs to manage and provision infrastructure
resources efficiently across different environments.
Context: Infrastructure as Code allows the organisation to define infrastructure
configurations using code. This ensures consistency in the deployment of infrastructure across
various environments. In large organisations, IaC helps in managing complex infrastructure setups
with version control, ensuring reproducibility and scalability.
Automation:
Scenario: Operations teams are overwhelmed with manual tasks related to server
provisioning, configuration, and maintenance.
Context: Automation tools and scripts are employed to automate repetitive tasks,
reducing the manual effort required for infrastructure management. This not only increases
efficiency but also minimises the chance of human errors in a large-scale environment.
Monitoring and Logging:
Scenario: With a multitude of applications and services running in production,
it's crucial to monitor system performance and detect issues proactively.
Context: DevOps teams implement robust monitoring and logging solutions to
track system health, identify bottlenecks, and troubleshoot issues. Automated alerts and
notifications enable teams to respond quickly to incidents, ensuring high availability and
reliability.
Collaboration and Communication:
Scenario: Development and operations teams need effective communication channels
to collaborate seamlessly.
Context: DevOps emphasizes a culture of collaboration, breaking down silos
between teams. Tools like chat platforms, issue tracking systems, and collaborative documentation
facilitate smooth communication, fostering a culture of shared responsibility and rapid problem
resolution.
Assignment: Try and give a "Mirror - Seminar" on below topics
Introduction to DevOps Principles
Understanding Version Control Systems
Reflection on Key DevOps Concepts
Summary of "The Phoenix Project" by Gene Kim -- Released in 2013 -- journey to revamp his struggling company's processes, using principles of DevOps
Git Basics and Git Bash
Repositories Refined:
Git repositories are the bedrock of version control, serving as a dynamic space where changes are meticulously tracked. As a senior DevOps Engineer, my experience underscores the importance of well-organized repositories for streamlined collaboration and project maintenance.
Branching Brilliance:
Git's branching model is a sophisticated dance of parallel development, where features and fixes evolve in isolation. Assignments often revolve around intricate branching strategies, ensuring a harmonious integration of diverse code contributions.