Codingtricks

Creating one Argo CD Application is straightforward. You tell Argo CD where the Kubernetes manifests are stored, choose a destination cluster and namespace, and let the controller synchronize the application. The difficulty appears when the platform grows. Imagine that the same application must run in development, staging, and production. You might begin by copying the original Application manifest three times. Later, another cluster is added. Then a second application team arrives. Before...

Argo CD often begins as a simple GitOps tool for one application team. A platform engineer installs it, connects a Git repository, creates an Application, and lets Argo CD synchronize Kubernetes manifests. The design becomes more difficult when the same Argo CD installation must serve multiple teams. Without clear boundaries, one team may be able to view another team’s applications, synchronize workloads into the wrong namespace, use an unapproved Git repository, or deploy cluster-scoped...

Running Kubernetes workloads is simple while your traffic is predictable. The real challenge begins when demand changes throughout the day. If the cluster has too few nodes, new Pods remain in the Pending state. If it has too many nodes, you continue paying for EC2 capacity that your applications do not need. Kubernetes Cluster Autoscaler solves this problem by adjusting the desired capacity of the EC2 Auto Scaling Groups behind your EKS node groups. When Pods cannot be scheduled because the...

Running MySQL yourself is easy at the beginning. Running it reliably in production is a completely different challenge. You must plan for backups, failover, monitoring, upgrades, connection spikes, security, scaling, and disaster recovery—all while keeping the application available. Amazon Relational Database Service (Amazon RDS) removes much of this operational burden. AWS manages infrastructure provisioning, database software installation, automated backups, patching, and many common...

If you’ve ever shipped a bad release straight to 100% of your users and then spent the next hour frantically rolling back while Slack lights up with angry messages, you already understand why canary deployments exist. A plain Kubernetes Deployment gives you rolling updates, but it has no idea whether your new version is actually healthy — it just keeps replacing pods on a timer and hopes for the best. Argo Rollouts fixes that gap by giving you a real progressive delivery controller: gradual...

If you’ve heard about HashiCorp Vault but never actually sat down and used it hands-on, this guide is for you. Vault is one of those tools where the concept sounds complicated — secrets management, authentication backends, policies — but once you run your first commands and see it working, everything clicks into place. In this tutorial, we’re going to skip the theory-heavy intros and get straight into practical usage. By the time you’re done, you’ll have a fully working Vault setup where a...

If you’ve ever scaffolded a Helm chart with helm create, you’ve probably noticed a mysterious file called _helpers.tpl sitting inside the /templates folder — and then completely ignored it. Don’t worry, most people do. But once you understand what it does, you’ll wonder how you ever managed without it. In this guide, we’re going to demystify _helpers.tpl from the ground up, with a hands-on example you can follow along with. What You’ll LearnBy the end of this tutorial, you’ll know how...

Have you ever wondered how traffic actually gets from the outside world into your Kubernetes cluster and finds the right application? That’s exactly what a Gateway controller handles — and in this guide, we’re going to set one up using Envoy Gateway, one of the most powerful options available today.By the end of this tutorial, you will know how to: Install the Envoy Gateway controller on a Kubernetes cluster Configure all the resources it needs: EnvoyProxy, GatewayClass, Gateway,...

Running Redis in production Kubernetes environments requires careful planning to ensure high availability, data persistence, and optimal performance. While a single Redis instance might work for development, production workloads demand a Redis Cluster that can handle failures gracefully, scale horizontally, and maintain data consistency—similar to how we set up high-availability PostgreSQL with operators. In this comprehensive guide, we’ll walk through setting up a production-ready Redis...

Running WordPress on Kubernetes might seem like using a sledgehammer to crack a nut, but when you need scalability, high availability, and the ability to handle traffic spikes during your viral blog post moments, Kubernetes becomes your best friend.In this comprehensive guide, we’ll walk you through everything you need to know about deploying WordPress on Kubernetes in a production-ready configuration. No shortcuts, no “works on my machine” solutions—just battle-tested practices that you can...