Can the Same Process Serve Both WebSocket + Http Rquest? (why is this an important question to ask) When building the chat app, we want to serve socket traffic to tell when a user is online and have the message be send as socket data package. The application also have some other functionality such as login/logout. Those are typically served by http protocols. This is because the server has no need to push to client for these features.

I am working on the MIT Distributed System class Spring 2020 6.824.

Challenge I was doing a little refactor for a codebase I worked in. The idea is to collect all free form environment variables into one class to have a centralized place to manage them all to simplify maintanence work. It was a simple task on the surface, but I ran into problems when structuring my unittest. The challange was realted to how Python handles class static variables. Python Class executes once when it is first loaded and then cached.

I run into some challenges setting up the APISIX test. Documenting it here for my furture self. The overall step looks like this, # get source $ git clone git@github.com:apache/incubator-apisix.git $ cd incubator-apisix # prepare runtime and start apisix process $ etcd --enable-v2=true & $ make init # create config files $ make deps $ make run # install required test-nginx repo to sibling file path $ git clone https://github.com/openresty/test-nginx.git .

Cloud provider like AWS, Azure, and GCP alredy have dyncamic provisioner setup. So when their user create resources like PersistentVolumeClaim, the resources gets automatically provisioned. Homelab cluster does not have a dynamic provisioner set up already, we are going to create one. The high level strategy is to use Synology as NFS server and have my pi cluster to deploy a NFS client as the provisioner. Set up NFS server Synology NAS