DevOpsDreams

Environment Promotion Strategies for GitOps Pipelines: Branches, Paths, Tags, and Digests GitOps promotion is a data-model problem before it is a tooling problem. This guide compares branches, directories, tags, image digests, Flux automation, and Argo CD Image Updater trade-offs. TL;DR A reliable GitOps promotion strategy makes the promoted artifact, environment-specific configuration, approval record, and rollback target explicit. Directory-per-environment models are simple and auditable, branch-per-environment models isolate change history but create merge drift, tag or SHA promotion improves reproducibility, and image-digest promotion closes supply-chain gaps. Flux Image Automation and Argo CD Image Updater can reduce toil, but production promotion still needs protected branches, signed commits or tags, policy gates, drift detection, and a clear handoff to progressive delivery across clusters safely. Promotion is the movement of a reviewed artifact through explicit environment s...

Terraform CI/CD Pipelines with GitHub Actions Learn how to automate Terraform workflows with GitHub Actions and improve your Continuous Integration/Continuous Deployment (CI/CD) pipeline. TL;DR Understand the benefits of automating Terraform workflows. Set up a Terraform CI/CD pipeline using GitHub Actions. Learn how to use Terraform Actions to automate Terraform workflows. Deploy to AWS Elastic Container Service (ECS) using GitHub Actions. Why Automate Terraform Workflows? As discussed in "The Ephemeral Infrastructure Paradox" , automating Terraform workflows is crucial to manage the identities of short-lived systems. This article will focus on automating Terraform workflows with GitHub Actions. Terraform and GitHub Actions GitHub Actions is a powerful tool that allows us to automate software development workflows directly in our repository. Terraform, on the other hand, is an Infrastructure as Code (IaC) tool that enables us to manage our infrastructur...

Kubernetes Backup and Disaster Recovery with Velero In this article, we'll explore how to implement a robust backup and disaster recovery strategy for your Kubernetes cluster using Velero. We'll cover the basics of Velero, its features, and provide step-by-step instructions on how to set up and schedule backups. TL;DR Velero is a tool for backing up and restoring Kubernetes cluster resources and persistent volumes. We'll cover the basics of Velero and its features. We'll provide step-by-step instructions on how to set up and schedule backups. We'll discuss common pitfalls and best practices for implementing a robust backup and disaster recovery strategy. What is Velero? Velero is a tool for backing up and restoring Kubernetes cluster resources and persistent volumes. It provides a simple and efficient way to create backups of your cluster, which can be used for disaster recovery, migration, or replication to development and testing environments. Feat...

Terraform State Management, Locking, and Backups: Best Practices for DevOps Engineers As DevOps engineers, we've all been there - stuck in a 3 a.m. on-call rotation, trying to troubleshoot a Terraform state lock that won't budge. In this article, we'll explore the best practices for Terraform state management, locking, and backups, and provide you with the tools and knowledge to avoid these common pitfalls. TL;DR Use a state backend like S3 or DynamoDB to store your Terraform state. Lock your Terraform state using a lock ID to prevent concurrent changes. Backup your Terraform state regularly to prevent data loss. Use a Terraform module to create a backup plan for your AWS resources. Why State Management Matters When you're working with Terraform, your state file is the single source of truth for your infrastructure configuration. If your state file becomes corrupted or lost, you'll be left with a mess of broken infrastructure and a lot of headac...

Designing Terraform Modules for Platform Teams As platform teams build and manage complex cloud infrastructure, designing reusable and modular Terraform configurations becomes increasingly important. In this article, we'll explore best practices for designing Terraform modules that promote standardization, modularity, and repeatability in your cloud infrastructure. TL;DR Design Terraform modules with standardization and modularity in mind Use Terraform modules to promote repeatability and reduce complexity Follow best practices for naming, structuring, and documenting Terraform modules Use Terraform modules to manage dependencies and reduce drift Test and validate Terraform modules before deploying them to production Why Terraform Modules Matter When building and managing complex cloud infrastructure, platform teams often face challenges related to standardization, modularity, and repeatability. Terraform modules can help address these challenges by providing a reus...

Applying SRE Error Budgets to Services Running on EKS In this article, we'll delve into the world of SRE error budgets and provide practical guidance on how to apply them to services running on Amazon EKS. TL;DR SRE error budgets are a way to measure and manage the risk of errors in a system. They help teams prioritize and allocate resources to mitigate errors. We'll cover the key concepts and provide a step-by-step guide to implementing error budgets on EKS. What are SRE Error Budgets? SRE (Site Reliability Engineering) error budgets are a way to measure and manage the risk of errors in a system. They help teams prioritize and allocate resources to mitigate errors, ensuring that the system remains reliable and available to users. In essence, error budgets are a way to quantify the acceptable level of errors in a system, allowing teams to make informed decisions about resource allocation and risk management. Why are Error Budgets Important? Error budgets are cr...

Chaos Engineering and Resilience Testing on Amazon EKS In this article, we'll explore how to implement chaos engineering and resilience testing on Amazon Elastic Kubernetes Service (EKS). We'll cover the basics of chaos engineering, how to set up a chaos mesh, and provide a step-by-step guide on how to run a chaos experiment on EKS. TL;DR Chaos engineering is a discipline that helps you build resilient systems by introducing failures in a controlled environment. We'll use Chaos Mesh, an open-source cloud-native chaos engineering platform, to set up a chaos mesh on EKS. We'll run a chaos experiment on EKS to test the resilience of our system. By the end of this article, you'll have a basic understanding of chaos engineering and how to implement it on EKS. What is Chaos Engineering? Chaos engineering is a discipline that helps you build resilient systems by introducing failures in a controlled environment. The goal of chaos engineering is to identi...

Kubernetes Multi-Tenancy with Namespaces and Network Policies In this post, we'll explore the best practices for implementing Kubernetes multi-tenancy using namespaces and network policies. We'll cover how to configure tenant isolation, restrict Flux CD to specific namespaces, and enable self-service deployments for tenants. TL;DR Configure tenant isolation using namespaces and network policies Restrict Flux CD to specific namespaces for multi-tenant isolation Enable self-service deployments for tenants Use network policies to control cross-tenant network communication Implement namespace isolation for each tenant Configuring Tenant Isolation with Namespaces When it comes to multi-tenancy in Kubernetes, namespaces are the first line of defense. By creating a separate namespace for each tenant, you can isolate their resources and prevent unauthorized access. However, simply creating a namespace is not enough – you also need to configure network policies...