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Customize the Kustomize for Kubernetes CRDs
I’ve introduced Kustomize in this earlier post, now I feel even happier because Kustomize can be even more customized for some CRDs(Custom Resource Definition). For instance, Kustomize doesn’t know how to handle Istio’s VirtualService object, but with some simple YAML style configurations it ‘learns’ to handle that easily. So in name-reference.yaml, kustomize will learn the…
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Use fzf to Supercharge Your kubectl Command
First let’s have a look at fzf, a super fast command line fuzzy finder. It’s mostly written in golang and there are so many ways to use it. In this note, I’ll just use it to select a value from a list in a terminal and then return it to next command. When working with…
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Deploying WordPress to Kubernetes with Kustomize
I’ve just migrated this blog site itself into the kubernetes cluster I built with Raspberry Pi 4s, and this post is about the steps and approach I used to achieve this goal. Yes, what you have been reading is served by 1 of the Raspberry Pi boards. First of all, a bit introduction on kustomize:…
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Kubernetes at Home on Raspberry Pi 4, Part 3
Continue from part 2, this is mostly about installing ingress controller. In short, an ingress controller is like a single entry point for all ingress connections into the cluster. The reason I chose Flannel over other CNIs is that it’s lightweight and not bloated with features. I would like to keep the Pi 4s easy…
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Kubernetes at Home on Raspberry Pi 4, Part 2
Continue from part 1 It’s recommended to change all Pi’s password also run ssh-copy-id [email protected] to enable SSH public key login. There are lots of steps to prepare before kubeadm is installed, so I made this ansible repository to simplify this repeating process. Please see here. The ansible role will do the following tasks: set…
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Kubernetes at Home on Raspberry Pi 4, Part 1
I mostly followed/was inspired by this tutorial but with some tweak/fix to recent(Sep 2019) software versions. Also this is a pure Linux walk-through as I don’t use a Mac. I planned to build a home Kubernetes(k8s) cluster and migrate home servers including the one this blog is running on to the k8s cluster, for a…
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Use FZF to Speed Up KUBECTL
FZF is general purpose option selector for Linux command line. By default fzf is an super-upgrade for the ctrl-r command history finder, but it is helpful for almost any scenario where you need to pick 1 item from a list. Here’s a tiny use case where I use fzf to select a kubernetes namespace and…
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Nicer Deployment with Kubernetes
The default strategy to do rolling update in a Kubernetes deployment is to reduce the capacity of current replica set and then add the capacity to the new replica set. This probably means total processing power for the app could be hindered a bit during the deployment. I’m a bit surprised to find that the…