In today’s fast-paced digital landscape, enterprise IT shops are facing harder and harder challenges when configuring, upgrading and maintaining enterprise infrastructure. GitOps has emerged as a practical configuration management solution that can couple version control with infrastructure as code. 

In this post, we will explore the fundamental concepts of GitOps and how it can transform the way enterprise IT operations manage their infrastructure.

What is GitOps?

GitOps is a modern operational model that leverages version control systems, such as Git, to manage system configurations throughout the IT infrastructure. It treats infrastructure components and their configurations as code, enabling infrastructure shops to define their infrastructure configurations in text files, stored in a Git repository. This version-controlled repository becomes the single source of truth, ensuring that all changes and updates to the infrastructure are traceable, and revertible, and best of all : Auditable.

The GitOps Process follows a “declarative” approach, where the desired state of the infrastructure and applications is specified in the Git repository. This approach ensures that the actual state of the system always matches the desired state defined in the repository.

The GitOps Workflow

The GitOps workflow consists of several key components that work in harmony to enable continuous delivery and operational efficiency. At the core of this workflow are:

Version-Controlled Repository: The Git repository acts as the source of truth for the entire infrastructure and application configurations. All changes, whether made manually or through automated pipelines, are tracked and versioned in the repository.

Continuous Reconciliation: An automated reconciliation process continuously monitors the Git repository for changes. Once changes are detected, the reconciliation loop automatically applies those changes to the target environment.

Automated Deployment: With GitOps, deployments become automated and consistent. Any changes made to the repository automatically trigger the deployment process, eliminating the need for manual intervention and reducing the risk of human errors.

Observability and Auditing: GitOps provides transparency and observability into the entire deployment process. Every change, rollback, and update is logged, allowing for easy auditing and compliance.

Technology: Git Repositories

To get started with GitOps in your enterprise IT environment, the first step is to set up a version-controlled repository . Choose a Git hosting service like GitLab or GitHub or Bitbucket, there are loads of options and create a dedicated repository for your infrastructure. Structure the repository in a way that reflects the desired state of your IT environment, with folders for different components and configurations. We like to set up repos for different types of operations like:

Network, Storage, Security, Platform Ops, VM Ops, Vulnerability Ops,  etc..

Next, establish access controls and permissions to ensure that only authorized personnel can make changes to their associated repository. Use branch protection rules and code reviews to maintain a high level of code quality and security.

Methodology: Infrastructure as Code (IaC)

A fundamental principle of GitOps is treating infrastructure as code. This means getting your admins and engineers to slowly transition away from making changes in GUI and start pushing changes as instructions. Infrastructure as Code (IaC) enables you to define and manage your infrastructure using code rather than manual or button click configurations. Popular IaC tools like Terraform and Ansible play a critical role in this process, allowing you to  declaratively define your infrastructure in simple code files and version them in the Git repository. 

By adopting IaC, enterprise IT operations gain several advantages, including:

  • Consistency: Infrastructure configurations are standardized and versioned, ensuring consistency across different environments.
  • Reproducibility: IaC enables you to recreate and provision infrastructure resources with ease, reducing setup time and improving scalability.
  • Collaboration: Version control fosters collaboration among IT teams, enabling multiple team members to work on infrastructure configurations simultaneously.
  • Auditability: Every change to the infrastructure is tracked, making it easy to audit and roll back changes if necessary.

Deploying Applications and Patches with GitOps

In addition to managing infrastructure, GitOps excels in deploying and managing applications. With GitOps, application configurations, including container images, environment variables, and application settings, are stored as inventory manifests in a git repo and the execution of a deployment works as an easily configurable workflow rather than a single step process.

The GitOps workflow ensures that Enterprise System configurations and changes to those configurations are consistent and automated. When updates to a system configuration is pushed to the Git repository, the automated reconciliation loop detects these changes and automatically applies them via the appropriate mechanisms are for the given system. This eliminates the need for manual intervention in the deployment process, reducing human errors and speeding up the delivery of new features and bug fixes.

By adopting GitOps for application deployments, enterprise IT operations can achieve:

  • Continuous Delivery: GitOps enables a continuous delivery model, where changes to system configuration or the deployment of a system is automatically delivered to production as soon as they are committed to the Git repository.
  • Versioning and Rollback: The version-controlled nature of GitOps allows for easy rollbacks to previous application configurations in case of issues or bugs.
  • Consistent Environments: Since all environments are managed through version-controlled manifests, consistency is maintained across development, staging, and production environments.
  • Increased Collaboration: Developers and operations teams collaborate seamlessly, as they share the same Git repository and work with the same deployment manifests.

Technology: Configuration Management Tools

To fully leverage the power of GitOps in an enterprise, organizations in most cases utilize a single or multiple configuration management and IaC tools. These tools let you cleanly and effectively deploy, configure and audit your  systems. Here are some open-source configuration management tools that you’ve likely heard of.

Terraform

Terraform is an open-source infrastructure as code (IaC) tool used for provisioning and managing cloud resources and infrastructure in a declarative way. It allows users to define infrastructure configurations in simple code files, enabling the automation of resource creation and management across various cloud platforms like AWS, Azure, and Google Cloud. Terraform shines in its ability to provide a consistent and scalable approach to infrastructure management, facilitating collaboration, version control, and ensuring that the desired state of the infrastructure matches the actual state, making it easy to understand and track changes to the infrastructure over time.

Ansible

Ansible is an open-source configuration management and automation tool used for orchestrating IT infrastructure tasks across multiple systems. It allows users to define configurations and automation routines in simple, human-readable YAML files, making it easy to manage complex infrastructure and application deployments. Ansible is useful for automating repetitive tasks across various platforms, including physical servers, virtual machines, and cloud instances. It shines in its agentless architecture, simplicity of use, and extensibility, enabling seamless automation and management of diverse IT environments.

Vagrant

Vagrant is an open-source tool used for creating and managing lightweight, reproducible, and portable development environments. It enables developers to define virtual machine configurations using simple and declarative text files, providing a consistent and isolated development environment regardless of the host operating system. Vagrant is particularly useful for developers who need to work on multiple projects with specific requirements or dependencies. It shines in its ease of use, allowing developers to quickly set up and share development environments, enhancing collaboration and reducing development environment inconsistencies.

Key Benefit: Security and Compliance

One of the most significant advantages of GitOps in enterprise IT operations is its positive impact on security and compliance. The declarative nature of GitOps ensures that the desired state of the infrastructure and applications is precisely defined in the Git repository. This allows for security checks and audits before changes are applied to the production environment.

To enhance security in GitOps, organizations can adopt the following practices:

  • Use Git Repository Access Controls: Implement strict access controls to limit who can push changes to the Git repository, reducing the risk of unauthorized changes.
  • Code Scanning and Vulnerability Assessment: Integrate code scanning and vulnerability assessment tools into your pipelines or workflows to identify and address potential security vulnerabilities inline.
  • Immutable Infrastructure: Treat infrastructure and application components as immutable, meaning they should not be modified directly in the production environment. Instead, updates should be made through changes to the Git repository.
  • Multi-Factor Authentication (MFA): Require multi-factor authentication for accessing the Git repository and other critical systems.
  • Audit and Compliance Reporting: Use GitOps tools that provide audit logs and compliance reporting capabilities to ensure accountability and meet regulatory requirements.

GitOps in Enterprise IT: Case Study

To illustrate the effectiveness of GitOps in enterprise IT operations, let’s explore a case study of one of our federal customers, This customer manages very large datacenters and virtual platforms.  The customer adopted GitOps to manage its hardware and virtual platform infrastructure configurations and upgrades.

This Federal customer faced challenges in maintaining consistency across its multiple development, staging, and production environments. Manual interventions in the change process resulted in configuration drift and system outages due to changes being made ad-hoc.

By implementing GitOps, our federal customer achieved several benefits:

  • Continuous Delivery and Rapid Deployment: With GitOps, the virtual infrastructure software and patches were automatically deployed with workflows into production without an engineer having to intervene, leading to faster upgrade cycles and shorter windows of reduced availability on some clusters.
  • Consistent and Reproducible Environments: GitOps ensured that all environments, including development, staging, and production, were consistent and reproducible. This reduced the likelihood of discrepancies and helped in debugging and troubleshooting.
  • Improved Collaboration between Dev and Ops Teams: The adoption of GitOps fostered better collaboration between the automation and operations teams. They shared a common version-controlled repository and worked together seamlessly.
  • Enhanced Security and Compliance: By managing infrastructure and application configurations through version control, our federal customer improved security and compliance. The auditing capability of GitOps ensured that changes were tracked, and any unauthorized modifications were quickly detected.

Conclusion

GitOps has emerged as a powerful methodology that can be used to streamline enterprise IT operations through version control. By treating infrastructure as code and automating the deployment process, organizations can achieve faster, more reliable, and secure operations. While GitOps does use DevOps tools and methods, and though GitOps most certainly does more than what we’ve talked about in this post, using a GitOps approach leverages mature technologies and methods to solve everyday Enterprise IT problems.

With GitOps, enterprises can respond to business demands more effectively, reduce downtime, and improve collaboration between development and operations teams. As you embark on your GitOps journey, remember to invest in the right tools and best practices that align with your organization’s needs.

Are you ready to embrace GitOps in your enterprise IT operations? Share your thoughts and experiences in the comments below!