upgrade EC2 from ubuntu 18.04 to ubuntu 20.04

this is quite a horror story for me.

create a private RDS from EKS using ACK (AWS controller for Kubernetes)

To cut long story short, I need to create a private RDS instance for EKS to access; and to do that, I need to create RDS in the same subnet as EKS; and, because my hands are itchy, I decided to do that via…

running macOS on WSL2 using sickcodes

KVM+QEMU

exploring NetworkPolicy in KIND cluster

I am learning to implement NetworkPolicy in k8s clusters and I learnt something new today.

in a k3d cluster, there is a default CNI which supports NetworkPolicy, see…

CKAD study environment

minikube, kind, k9s, k3d, AKS, EKS, kops

I have been using k8s for few years and currently study to prepare for CKAD certification.

Here is some notes I captured for the various k8s tools that I have tried or trying.

How to modify kube-apiserver in KIND environment?

Method 1:

— login to the KIND container

# docker ps
CONTAINER ID   IMAGE                  COMMAND                  CREATED      STATUS          PORTS                       NAMES
d8da3dc84264…

ask chatGPT to create an exploit for CVE

CVE-2021–23567

A simple setup to troubleshoot pod level performance issue