ChatGPT is super hot. Let me record of my three interactions with ChatGPT also. 1. How to Show Whitespaces in Neovim Search google, most result are just about vim. While when ask ChatGPT, in neovim, how to show whitespaces ChatGPT really impressed me with below.

I am deploying an Operator based product onto the OpenShift cluster, however the reconciling error message of the operator gives me, DNS Error: Server Misbehaving. Please check DNS Settings. Sure enough, the DNS server is having problem. But it worth a study on how the DNS system works in the…

Sometimes routing on a reverse proxy based on SNI (server name indication) may not be enough, a layer 7 routing based on the URL path is required. Let’s explore the URL mapping with Traefik. Testing Application We have the following https server that listens on a different port with a different http…

You build your application container image on a Linux server, push it over to the Github registry. On your new Apple silicon M1 laptop, you run the image, but received the following warning error message. podman run -it -d ghcr.io/zhiminwen/niceapp:v1.0 …

Log is an important part for debugging. Troubleshooting and debugging of a concurrent program is difficult. In Golang, this getting even worse as officially the Goroutine’s id is not exposed for access. But its kind of well known and spread out that the goroutine id can be obtained using some…

OAuth grant is a process for a client application to acquire the access token to access the resource. Natively in IBM APIC Connect, OAuth2 functionality is provided. Let’s explore the different grant types that API Connect supported. Create the OAuth Provider Create a OAuth2 provider in API Connect, and define the authorization and token…

In IBM API Connect, the Authentication URL user registry provides a simple way to integrate with other user registry, authentication service and so on. It’s basically a URL that accept HTTP Basic authentication request, if the authentication is successful, a HTTP OK status should be return. …

I use magefile as a tool for my Infra as Code (IaC). Actually not only that but a lot of my setup work, configuration work, compile work and so on, are all done with the mage tasks. I had a story on magefile of how I extend it to perform…

Most of the company with an established IT system will have their own Public Key Infrastrcture (PKI) in place. In the OpenShift Container Platform, how we integrate it with the existing PKI? This paper examines how we can use the external certificate for the OCP platform or for the container…