raynix 筆記

raynix 筆記

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  • How to Share Files on Linux Using Docker

    Prerequisites: A Linux computer(mine is Fedora 36) Docker(or podman) installed I know, there’s traditional ways to share files over network such as samba or the very current cloud way such as Google Drive. Or I can just use a USB key. But I managed to impress my child(who has to use Windows because of her […]

    June 26, 2022
    Opensource
    docker, share
  • How to Build Multi-Arch Docker Images for MacBook M1

    At work, I currently use a MacBook Pro with an Intel chipset and some of my colleagues have upgraded to ones with M1 chipset which is of arm64 or aarch64 architecture. Then expectedly I need to build some Docker images for both architectures. I’ve done some multi-arch Docker stuff before so this is not really […]

    June 23, 2022
    Systems Admin
    arm64, docker, mac
  • How To Renew Certificates in Kubernetes Clusters, Revisited

    There is a lot of TLS certificates used by the core of a Kubernetes cluster and a popular one is the client-server pair used by kubectl to authenticate to the cluster control plane. In my previous notes on how to renew certificates in a Kubernetes cluster with kubeadm, I found that the steps are quite […]

    May 21, 2022
    Opensource, Systems Admin
    Cert, kubernetes, TLS
  • Home Battery, Worth Buying?

    During the lockdown days in 2020, I got A Tesla Powerwall 2 + Backup Gateway 2 combo installed by Natural Solar. The total cost was A$14,000. “Is it worth buying?” or “Would it pay for itself?” those were the question I got asked a lot. With a full year’s data from 2021, I think I […]

    May 11, 2022
    Energy Efficiency
    Clean Energy, PowerWall, Tesla
  • Blog Deployed With Jsonnet, Grafana Tanka and ArgoCD

    It’s been a year since I did the ‘Hello World’ with Jsonnet and Tanka, then I made a simple side-loader container to install Tanka as a plugin to ArgoCD and finally deployed an httpbin container with ArgoCD + Tanka + Jsonnet. However since Jsonnet wasn’t used in my work, those things were shelved afterwards. Recently […]

    May 2, 2022
    Opensource, Systems Admin
    jsonnet, kubernetes, tanka
  • Easy Kubernetes Secret Integration with ExternalSecrets

    Easy Kubernetes Secret Integration with ExternalSecrets

    In a Kubernetes cluster, A Kubernetes Secret is a resource type to hold sensitive data for the apps to use, such as an API key or database password. Secrets are namespaced so if I have RBAC access to a namespace, I can pretty much see all the secrets there, as the secrets are only base64 […]

    April 29, 2022
    Opensource, Systems Admin
    ExternalSecret, kubernetes
  • Install Fedora 36 on Dell XPS 13 9380

    Install Fedora 36 on Dell XPS 13 9380

    I happened to have acquired a used Dell XPS 13 9380, which is a nice little ultrabook with Intel 8th gen i7 CPU, 16GB memory(not upgrade-able), 512GB nvme SSD and a beautiful 13″ 4k screen. It has Windows 10 installed. Of course I have no intention to continue to use the stock Windows 10. At […]

    April 16, 2022
    Hardwares, Opensource
    Dell, Fedora, linux
  • Better Resilience for Kubernetes Pods

    I happened to notice that all 3 pods serving this blog in my Kubernetes cluster were allocated to a same node. I thought Kubernetes will try its best to shuffle pods of a deployment into different nodes by default but guess I expected too much. Note the knode3 below Have you spotted the problem? In […]

    April 11, 2022
    Opensource, Systems Admin
    kubernetes
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