Passing arbitary arguments to containers in K8s

arg.sh

#!/bin/sh
echo Your container args are: "$@"

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello
spec:
  selector:
    matchLabels:
      app: hello
  replicas: 1
  template:
    metadata:
      labels:
        app: hello
    spec:
      containers:
        - name: hello
          imagePullPolicy: Never
          image: homelab/argtest:latest
          command:
          - sh
          - -c
          - 'exec ./arg.sh $(date +%Y-%m-%dT%H)'

Dockerfile

FROM alpine:latest
COPY ./arg.sh /
ENTRYPOINT ["/arg.sh"]

Output is:

Your container args are: 2019-10-01T12