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How to Drop Unwanted Metrics with Google Managed Prometheus
TL; DR: some prometheus exporters such as kube-state-metrics do emit a LOT of metrics and that will make a difference in your next bill so here’s how to drop them. 🙂
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A Deep-merge Function for Jsonnet
TL; DR: As of March 2025, there’s no deep merge function in Jsonnet’s standard library yet. So I wrote something myself. Not sure if I should do a PR to contribute but my last attempt was still there hanging 🙂
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Solved: Couldn’t Delete istio-system Namespace
The other day, I was playing with ArgoCD application sets and by mistake renamed an application owned by its application set. What’s worse is, the application is istio. By the default logic an application set will delete the old application and create one with the new name, so the istio application was being deleted. I…
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How to Deploy to Multiple Clusters with ArgoCD
TL; DR: here are the steps to deploy to multiple Kubernetes clusters using a single ArgoCD server + Application Sets. Let’s get to it. Add a Kubernetes Cluster to ArgoCD First, we’ll use the argocd CLI. Just in case you don’t have it yet, it’s easy to install. Assuming kubectl is already configured and has…
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How to Enable Linux System Suspend to RAM/S3 on Alienware
TL; DR: No you can’t. Thanks to Dell and Microsoft. And why would anyone run Linux on an Alienware gaming laptop anyway? Well, I do. I tried to enable deep sleep for my Alienware laptop running Arch Linux. While I couldn’t be bothered to do this on some other laptops because even in the default…
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How I Super Charged My WordPress Blog with Peakour CDN
I’ve been a CloudFlare user for years and I’m grateful for the free plan CloudFlare offered to personal websites. Also domain names are cheaper at CloudFlare. Nothing to complain if it’s a free service. But this blog was slow as a matter of fact – it took usually a few seconds to have a response…
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How to Migrate from Istio Ingress Gateway to Kubernetes Gateway API
Why? Before the last Istio upgrade I did with Sail Operator, there was Istio 1.19 running in my Kubernetes lab. And the Istio Ingress Gateway has worked very well for years, after I migrated from Kubernetes Ingress Controller. Now with Istio 1.23, Kubernetes Gateway API became an option along side with Istio Ingress Gateway. What…
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How to Install the Sail Operator for Kubernetes
I was a late adopter of the Istio Operator but didn’t expect that it will be gone so soon. I didn’t want to go back to manage Istio using istioctl or Helm templates so I was in a rush to pick a successor for Istio Operator. After reading a few articles, looks like I’m gonna…