Understanding GitOps: Principles, Benefits, and Implementation for Cloud‑Native Application Delivery

1 What is GitOps?

GitOps is a set of practices that manage the underlying infrastructure of applications using Git as the single source of truth for declarative configuration, extending DevOps and Infrastructure as Code concepts.

The term was coined by Weaveworks in 2017 to manage Kubernetes deployments, but it now also supports solutions like Terraform.

GitOps aims to simplify development by providing reproducible infrastructure with proper state management, improving overall visibility and reducing operational overhead.

Increased overall visibility

Reduced management overhead of application infrastructure

Developers or operations teams declare infrastructure as code in Git, create pull requests for changes, and trigger CI/CD pipelines to update the infrastructure automatically.

GitOps also offers flexibility to choose any tools, technologies, or platforms while applying the same DevOps practices.

2 Principles of GitOps

Declarative Systems

The entire system is defined declaratively, focusing on the desired state rather than the steps to achieve it, allowing easy storage of state in Git for deployment and rollback.

Versioned System State in Git

All declarative states are stored in a version‑control system, providing a single source of truth that enables troubleshooting, auditing, and rollback.

Automatic Application of Changes After Approval

When a pull or merge request is created, it is validated and, once approved, the changes are automatically applied, favoring immediate automated deployment.

3 Benefits of the GitOps Approach

Ease of Infrastructure Management

GitOps integrates infrastructure into CI/CD pipelines, allowing rapid testing and deployment of changes using tools such as CI/CD platforms, automated deployment, and shorter feedback loops.

Increased Productivity

Source‑controlled, validated infrastructure reduces configuration errors, saves time for operations teams, and enables multiple teams to work on different parts of the infrastructure without interference.

Improved Reliability and Stability

Version‑controlled infrastructure changes are validated, reducing errors; auditability and rollback capabilities further enhance stability.

GitOps also helps identify and quickly remediate drift between declared and actual infrastructure.

Standardization

It promotes standardized end‑to‑end workflows, code structure, documentation, and testing methods, leading to fully reproducible infrastructure configurations.

Enhanced Security

GitOps tracks all infrastructure changes in Git, providing audit trails, responsible user identification, deployment timestamps, affected resources, and reduces credential exposure by limiting direct access to resources.

4 How to Implement GitOps

If your organization already uses Git for source control and has a DevOps pipeline, adding GitOps is straightforward: add infrastructure code to a Git repository and configure the CI/CD pipeline to include it.

For a fresh start, choose a Git repository (GitHub, Bitbucket, GitLab, etc.) and a CI/CD platform (Jenkins, CircleCI, Bitbucket Pipelines, GitLab Pipelines). The goal is to automate delivery and create a clear workflow between the Git repo and the infrastructure platform.

The GitOps operator (e.g., Kubernetes operator, Terraform Cloud Operator, Azure Services Operator) acts as the bridge between the pipeline and the infrastructure.

5 GitOps Workflow

Infrastructure engineers declare infrastructure as code, push it to Git, and create a pull request. After review and approval, the CI/CD pipeline triggers the GitOps operator, which compares the current state with the desired state and reconciles any differences, automatically provisioning the required infrastructure.

This process can be extended to multiple environments (staging, production) for additional safety.

6 GitOps Example

A web application experiences a traffic surge, causing performance issues. Using GitOps, the delivery team defines a resource increase, pushes the change to Git, and after review, the change is automatically applied, scaling the infrastructure to meet demand.

If deployment fails, GitOps enables rapid rollback to the previous state, allowing the team to correct the issue and redeploy.

7 Simplified Automated Pipeline

GitOps transforms manual, complex infrastructure tasks into a streamlined automated pipeline, improving visibility, reliability, and stability while reducing operational effort.

Original article (translated for learning): https://www.bmc.com/blos/gitops-cloud-native-app-delivery/ >>> Welcome submissions, WeChat: devopsvip.

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