DevOps is a set of practices that combines software development (Dev) and IT operations (Ops). It aims to shorten the development lifecycle while delivering high-quality software in a continuous and efficient manner.
Key principles include collaboration, automation, continuous integration, continuous delivery, continuous monitoring, and infrastructure as code.
A DevOps Engineer manages and optimizes the processes from development to deployment, automating tasks, setting up CI/CD pipelines, ensuring scalability, and monitoring system performance.
CI is the practice of merging code changes into a shared repository frequently and running automated tests to detect integration errors early.
CD is the process of automatically building, testing, and deploying code to production, ensuring the software can be released at any time.
IaC is the practice of managing and provisioning infrastructure through code, allowing consistent, repeatable, and automated deployment processes using tools like Terraform and Ansible.
A CI/CD pipeline automates the steps involved in software development, from integration and testing to delivery and deployment, ensuring consistent and reliable software updates.
DevOps tools that are frequently utilized include AWS, Azure, Google Cloud, Jenkins, Docker, Kubernetes, Git, Ansible, Terraform, Nagios, and Prometheus.
Docker is a containerization platform that allows developers to package applications along with their dependencies in containers, ensuring they run consistently in any environment.
Kubernetes is an open-source platform designed to automate deploying, scaling, and operating containerized applications across clusters of hosts.
Microservices is an architectural style where applications are broken down into smaller, independent services that can be developed, deployed, and scaled independently.
Version control is a system that records changes to files over time so that specific versions can be recalled later. Git is a popular version control system.
Git is a distributed version control system that tracks changes in code and allows multiple developers to collaborate on projects by creating branches, making commits, and merging changes.
Git is a version control tool, while GitHub is a platform that hosts Git repositories and provides collaboration tools for developers.
'Shift left' refers to identifying and addressing issues earlier in the development cycle, such as testing and security, which traditionally occur later in the process.
Configuration management ensures that all systems are configured consistently across environments and that changes are tracked and managed using tools like Puppet, Chef, or Ansible.
Monitoring helps ensure the health of the system, providing real-time insights into system performance, identifying potential issues, and enabling quick resolution.
Agile focuses on software development processes, emphasizing iterative progress and collaboration. DevOps extends Agile principles to include IT operations, focusing on automating and optimizing delivery.
Immutable infrastructure refers to servers or systems that, once deployed, are never modified. Instead of patching or updating, a new instance is created with the necessary changes.
DevOps facilitates automated provisioning and management of infrastructure, making it easier to scale by dynamically allocating resources based on demand using tools like Kubernetes and AWS.
