Kubernetes Device Plugin for serial ports

(or infact any character device)

Building

$ cargo build --release

Config file format

ports:
- /dev/ttyS0

Ports is the list of character devices you want available to pods.

Usage

Run the executable with enough permissions to connect to Unix sockets, and create Unix sockets in /var/lib/kubelet/device-plugins/.

-c on the command line specifies the location of the config file.

Usage in K8S definitions

Set pod resources as follows (to request 2 serial ports);

apiVersion: v1
kind: Pod
metadata:
  name: demo-pod
spec:
  containers:
    - name: demo-container-1
      image: k8s.gcr.io/pause:2.0
      resources:
        limits:
          as207960.net/serial: 2

This will create two devices named /dev/ttyS0 and /dev/ttyS1 from the pool of available resources.

Why?!

I want to run a BBS in k8s, is that not reason enough?