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Kubernetes

Kubernetes is an open source system for automating deployment, scaling, and management of containerized applications.
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The Changelog The Changelog #419

Inside 2020's infrastructure for Changelog.com

We’re talking with Gerhard Lazu, our resident SRE, ops, and infrastructure expert about the evolution of Changelog’s infrastructure, what’s new in 2020, and what we’re planning for in 2021. The most notable change? We’re now running on Linode Kubernetes Engine (LKE)! We even test the resilience of this new infrastructure by purposefully taking the site down. That’s near the end, so don’t miss it!

Gerhard Lazu changelog.com/posts

The new changelog.com setup for 2020

In this post I share the latest 2020 and beyond details for changelog.com’s infrastructure.

Why Kubernetes? How is Kubernetes simpler than what we had before? What was our journey to running production on Kubernetes? What worked well? What could have been better? What comes next for changelog.com? Read this post and listen to episode #419 to learn all the details.

Kubernetes keel.sh

Keel is a tool for automating Kubernetes deployment updates

kubectl is the new SSH. If you are using it to update production workloads, you are doing it wrong. See examples on how to automate application updates.

We’re using this in our new Kubernetes-based infrastructure (more details on that coming to a podcast near you). Keel runs as a single container, scanning Kubernetes and Helm releases for outdated images. Super cool stuff, and even has a web interface (which we’re not using yet, but should).

Keel is a tool for automating Kubernetes deployment updates

Kubernetes github.com

K9s makes K8s look gooood ✨

We’ve linked K9s up in the past, but I’ve been playing with it today and I just had to share it again. Gerhard has us up and running on LKE (more on that coming to the blog and podcast soon) so I’ve had a chance to kick the tires a bit.

I have no idea how any of this magic works, but I do know that I like it and I’m excited to learn more. Here’s a screen grab of its Pulses feature, which gives you an overview of your entire cluster.

K9s makes K8s look gooood ✨

Kubernetes github.com

Fully-baked, collaborative development environments in your browser

Tightly integrated with GitLab, GitHub, and Bitbucket, Gitpod automatically and continuously prebuilds dev environments for all your branches. As a result, team members can instantly start coding with fresh, ephemeral and fully-compiled dev environments - no matter if you are building a new feature, want to fix a bug or do a code review.

There’s a SaaS offering that’s free for open source or you can self-host it if you prefer.

Fully-baked, collaborative development environments in your browser

Michael Terhar brownfield.dev

Building real applications from my iPad

Michel Terhar:

In the search for a comfy and portable developer experience, I’ve made a lot of compromises in the past. The experience has gotten significantly better recently thanks to VS Code and Kubernetes. This workflow also does a good job for underpowered laptops or when working with lots of different and conflicting versions of python or ruby.

This is a solid, balanced piece that doesn’t overly sell the workflow and walks you through setting it up for yourself.

Kubernetes github.com

Kubernetes multi-cluster deployment automation service

Application deployment and management should be automated, auditable, and easy to understand and that’s what beetle tries to achieve in a simple manner. Beetle automates the deployment and rollback of your applications in a multi-cluster, multi-namespaces kubernetes environments. Easy to integrate with through API endpoints & webhooks to fit a variety of workflows.

Kubernetes multi-cluster deployment automation service

Kubernetes learnk8s.io

Validating Kubernetes YAML for best practice and policies

This article compares six static tools to validate and score Kubernetes YAML files for best practices and compliance.

One of the challenges with YAML is that it’s rather hard to express constraints or relationships between manifest files.

What if you wish to check that all images deployed into the cluster are pulled from a trusted registry?

How can you prevent Deployments that don’t have PodDisruptionBudgets from being submitted to the cluster?

Luca Popesco port8080.sh

What I learned working with a cheap Kubernetes cluster

I was recently involved in an interesting project. Deploying a full production and development environment on a very budget-constrained Kubernetes cluster, managed through GKE. A big departure from my usual, where I have nearly unlimited budget for my cluster. The issues I ran into, and the solutions for them, were actually the inspiration to start this blog, just so I could write this post.

This is a great reason to start a new blog 👏

Kubernetes github.com

What happens when ... Kubernetes edition

Remember that README that answers the age old question:

What happens when you type google.com into your browser’s address box and press enter?

Well, the format is back with a Kubernetes focus, this time answering:

Imagine I want to deploy nginx to a Kubernetes cluster. I’d probably type something like this in my terminal:

kubectl run nginx --image=nginx --replicas=3

and hit enter. After a few seconds, I should see three nginx pods spread across all my worker nodes. It works like magic, and that’s great! But what’s really going on under the hood?

Asad Faizi cloudplex.io

The hidden costs of Kubernetes and Cloud Native

Kubernetes has won and the cloud is a moving target. But, one thing that often gets lost in the mix with all the Cloud Native talk is the productivity costs associated with keeping up.

In the US alone, over 70% of enterprises have adopted or are currently adopting cloud-native architecture, causing a surge in developers who are trying to learn the stack.

It’s called the “cutting edge” for a reason…

Staying on the cutting edge…one critical area of productivity loss is keeping up with all the changing technologies.

Cloud-native architecture is still being developed and learning the latest technologies is a moving target. While at the same time, most computer science and software engineering programs don’t delve into the heart of these technologies. At best, graduates will have limited experience working with a handful of these cloud technologies…

Depending on your perspective or seat at the table, these hidden costs could be a good thing.

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