System design - Kubernet

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System design

A collection of 18 posts

ELI5: Kubernetes

ELI5: Kubernetes

Explain it like I'm five: Kubernetes. Here are the big highlights that define the use case of Kubernetes.

Create a full-featured Kubernetes Cluster on your PC

Create a full-featured Kubernetes Cluster on your PC

With only a single command, you could have a fully-functional cluster running locally in seconds!

Terraform and Helm

Terraform and Helm

Did you know that you can fully create a managed Kubernetes cluster in Azure using Terraform? Well you can take that one step further and also manage what's installed in your cluster using Terraform and Helm. This can be done by using the Helm provider for Terraform. Now,

Kubernetes - 413 Request Entity Too Large

Kubernetes - 413 Request Entity Too Large

How to solve 413 Request Entity Too Large in Kubernetes using NGINX Ingress.

Verify Node is Ready to join K8s Cluster

Verify Node is Ready to join K8s Cluster

What happens if a node joins a cluster before it is ready? Fortunately, you'll never have to find out. For this very reason, there is a test suite maintained by the Kubernetes community called the Node Conformance Test. This set of tests will ensure that the node complies

Major Limitations of Kubernetes

Major Limitations of Kubernetes

The limits of Kubernetes are generally going to be difficult to hit for many organizations. But having said that, here are the major limitations of Kubernetes: * Maximum pods per node: 100 * Maximum nodes: 5,000 * Maximum pods: 150,000 * Maximum containers: 300,000

How to Keep up with the Rapid Pace of Azure

How to Keep up with the Rapid Pace of Azure

I work with Azure a lot. And as a Solutions Architect, I often find myself seeking answers to rather deep questions, refreshing my memory on old tech or concepts, or seeking new technology or solutions to solve my problems. I admit, it's extremely hard to keep up. Whatever

Choosing a Git Branching Strategy

Choosing a Git Branching Strategy

There are several out there, and a lot of opinions to go with them. Having served in a consulting capacity for many organizations, ranging from small startups to very large enterprises, I have seen all of the major strategies. I've even seen organizations make up their own strategies

How Many Kubernetes Clusters You Should Have 🚢

Azure Kubernetes Service

How Many Kubernetes Clusters You Should Have 🚢

At my current company, the powers that be have bought into a multi-cluster approach. I'm not saying 1 cluster per environment or region. No. I'm saying 1 non-production and 1 production cluster per system per region. Essentially, each team gets their own pair of clusters in

Visualize Azure Active Directory Role-Based Access Control for Kubernetes

azure active directory

Visualize Azure Active Directory Role-Based Access Control for Kubernetes

Acronyms: * AAD - Azure Active Directory * AKS - Azure Kubernetes Service * RBAC - Role-based access control Recently, I implemented AAD for AKS RBAC. The documentation doesn't do a great job of visualizing what the mappings look like, so here's a quick view of how you can

Pipelines as Code - Don't Reinvent the Wheel

Pipelines as Code - Don't Reinvent the Wheel

The term "Pipelines as Code" means that you are defining the process through which your code moves from source control, all the way to running in production. This practice is absolutely necessary if you want to build a high performing development process that allows your system to be

Migrating to Kubernetes: A Manager's Guide to Effective Transition (Part 1)

Migrating to Kubernetes: A Manager's Guide to Effective Transition (Part 1)

For teams that are looking to build out a Kubernetes cluster and migrate their applications, my first reaction is always the same, no matter the skill-level and capability of the team. Here's something of how the conversation goes: First, let's identify your Kubernetes administrators and let

When to use a StatefulSet in Kubernetes

When to use a StatefulSet in Kubernetes

To put it simply, a StatefulSet should be used to govern one or more related pods that need to track state in some way. A StatefulSet would be what you use instead of a Deployment. StatefulSets are a particularly cool implementation detail among Kubernetes workload APIs. It works very similarly

How to Get Started with Kubernetes

How to Get Started with Kubernetes

When getting started with Kubernetes, I was extremely lost. I tried jumping straight into the Kubernetes documentation, but I wasn't able to make sense of it all and where to begin. It's okay if that's where you are – that's totally normal. So,

CI/CD for Kubernetes Applications (Part 1)

CI/CD for Kubernetes Applications (Part 1)

So you're ready to automate your application deployment to Kubernetes. You've made the right choice! Let's consider what a pipeline might look like if you are using Kubernetes manifests directly without the use of a tool such as Helm. In other words, you just

GitHub Actions - Build and Push a Docker Image

GitHub Actions - Build and Push a Docker Image

Github Actions are here, and they are really great to work with. Let's take a look at how you would use a GitHub action to build and push a Docker image to your GitHub container registry. First, here's the YAML file we will consider. It lives

The second tragedy of the AT&T Bombing in Nashville

The second tragedy of the AT&T Bombing in Nashville

In the wake of the Nashville bombing tragedy on Christmas morning, many folks across Tennessee and Kentucky were left without internet and phone connectivity. 911 lines were down. Flights had to be cancelled. Even as I'm writing this, more than 36 hours later, there is still a significant