aws

How to pause your kOps-managed Kubernetes cluster on AWS?

This is a tutorial on how to pause your kOps-managed Kubernetes cluster gracefully. After following these steps, if you re-spawn your cluster, all the existing k8s components will be retained.

root

Jun 10, 2024 — 1 min read

Pre-requisites

This tutorial assumes that you have a kOps managed Kubernetes cluster running on AWS.

Steps

Run kops get ig to list the instance groups. You will see two instance groups — one for the control plane and one for your worker nodes.Eg: If you’ve been using kOps in the us-west-2a availability zone, you will see control-plane-us-west-2a & nodes-us-west-2a.
Run kops edit ig nodes-us-west-2a and change the minSize and maxSize values to 0.
Do the same for the control page group by running kops edit ig control-plane-us-west-2a.
To apply these changes to your cluster, run kops update cluster --name=${NAME} --yes. Here NAME is a global variable referring to the name of your cluster.
If you get a message “Changes may require instances to restart: kops rolling-update cluster”, just run kops rolling-update cluster.

This will terminate all worker nodes & control plane nodes, but persist the cluster state in your S3 state store. If you re-spawn your cluster, all the existing pods will be retained. How to pause your kOps cluster on AWS?

This is a test blog post

This is meant to test the pSEO blog posts on bytesandlogs.me.

How to fix slow refactoring operations in CLion?

In this post learn how to make refactoring, renaming, and basic file operations in your CLion fast.

Can you change state in a const function in C++? Why? How?

In this post, we discuss why you might want to change the state in a const function in C++, and how you can change the state using const_cast. We also discuss whether it is a good practice to use const_cast in C++ codebases.

When should you use kOps over EKS?

In this post, let's compare two popular ways of operating a Kubernetes cluster on AWS — kOps vs AWS EKS.