backend.yaml

apiVersion: v1
kind: Pod
metadata:
  labels:
    env: qa
  name: my-application
spec:
  containers:
  - image: busybox
    name: myapp-container
    command: ['sh', '-c', 'echo The app is running! && sleep 3600']
  initContainers:
  - image: python:3.8-slim
    name: init-database
    command: ['sh', '-c', 'pip install mysql-connector-python && until python /tmp/mysql-program.py; do echo waiting for db initialization; sleep 2; done']
    volumeMounts:
       - name: mysqlprogram
         mountPath: /tmp
  volumes:
      - name: mysqlprogram
        configMap:
           name: mysql-program
           items:
           - key: mysql-program.py
             path: mysql-program.py