Jaehong Jung

DevOps Engineer at Channel.io

Hi there! 👋 This is Jaehong Jung, and currently I’m serving as a Devops Engineer at ChannelTalk. Furthremore, I also have some experiences on Network security labs, blockchain industries and few startups. I am really into Kubernetes, Golang, and Neovim these days.

Explore About Me to found out more information about me. Also, additional ML studies are recorded in my own https://ml.jaehong21.com.

Supported Language

🇺🇸 English | 🇰🇷 한국어

Recent

Creating Lightweight Java Container with Custom JRE

8 April 2024·541 words

Learn to drastically cut Java Docker image sizes using jdeps and jlink for creating custom Java Runtime Environment

[K3s-06] How to create an actually safe secrets for GitOps

21 December 2023·745 words

Kubernetes secrets are not actually safe to store on git. it is just base64 encoded. sealed secrets are encrypted with a key pair.

[K3s-05] How to automate issuing TLS certificate in K3s ingress

19 December 2023·662 words

How to attach TLS certificate to K3s ingress using let’s encrypt and dns-01 challlenges. Also, how to attach TLS certificate using Cloudflare Origin CA with proxied to Cloudflare Network

[K3s-04] K3s Service LoadBalancer Configuration (Klipper and MetalLB)

14 December 2023·711 words

How to expose K3s container service to outside using LoadBalancer. There are two options, using K3s default LoadBalancer Klipper or MetalLB which is well known for on-premise LoadBalancer.

[K3s-03] How to Inject Docker Credentials to K3s

9 December 2023·900 words

How to download docker credentials from AWS ECR and inject to K3s cluster.