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An Easy Way to Build GitHub Actions Workflows
TL; DR: I found it not so convenient to look up GitHub’s official docs when traversing objects in GHA(GitHub Actions), ie. what’s in github.event object? So using a few steps now all the data structures are available to me. 🙂
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A Simple and Interactive Decoder for Kubernetes Secrets
TL; DR: Here’s a simple shell function which can decode Kubernetes secrets interactively and should work in any Bash and compatible environments. Requirements: Here’s the code. This can be chained together with other commands too, eg. on a Mac, I can do Then the decoded content of selected secret key will be put into clipboard.…
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How Much Did I Pay for Electricity, Petrol and Gas in 2023?
Am I one of those minimalists? No. The secret is, I paid 0 for petrol and gas – I have no need of them since I fully electrified my home. Here are the milestones of my journey to full electrification: I suspended my gas account in May 2023 and the process costed me $88. With…
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A GKE Issue: Metadata Service Is Unreachable In Nodes
Recently I encountered some errors in a GKE cluster where a lot of pods were stuck at crash loop backoff state, which means the pods couldn’t recover on their own. When taking a closer look, I saw errors like: It’s a DNS issue then. However when I created a pod and ran some DNS tests…
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ArgoCD, Jsonnet and Tanka in 2024
A few years ago, I got to know Jsonnet and I loved it at first sight. I used a nice little tool called tanka to manage my Jsonnet manifests and I got them working together with ArgoCD, and finally I re-deployed my blog using this combo. Everything worked like a charm, until… Recently I upgraded…
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How to Enable Gzip Compression for Istio Ingress Gateway
TL; DR: here’s a code snippet to turn on gzip compression for Istio’s ingress gateway, using Envoy filter. Tested with Istio 1.16 and Kubernetes 1.26. To test it with curl: 🙂
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3 Years Later, How Is My PowerWall 2 Keeping Up?
TL; DR: I’ve installed my PowerWall 2 3 years ago. It wasn’t cheap but the quality is great too. There’s 0 issue so far and it helped a lot to “keep my lights on”. And if calculated using recent electricity rate, it has saved me $3,115 so it’s still a long way 🙂 Uptime: 100%…
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How to Mount an Existing Google Persistent Disk to a Pod in GKE
TL; DR: Below are steps to mount an existing Google Persistent Disk to a pod in a GKE cluster in the same region. Most of the time I’d prefer to run stateless pods in Kubernetes clusters – they come, they go, as if nothing happened. When there are things to be persisted, a Persistent Volume…