How do you pass arguments to a POD in Kubernetes ?

• In Kubernetes Pod YAML files, the “command” field tells the container what to do when the pod starts, and the “args” field gives it any parameter or augments needed.
  
• This sample java project, takes 2 number as an argument and shows the output.
  
• In case of a docker image, the way to pass command and arguments is like this
  

FROM openjdk:17.0.1-jdk-slim
COPY target/classes/ /tmp
WORKDIR /tmp
ENTRYPOINT ["java", org.raj.nola.AddTwoNumbers"]
CMD ["5","15"]

• ENTRYPOINT is the command which container executes and CMD is the parameter which is passed to the program.
  
• To do the same in a kubernetes pod, the deployment file will look like below
  

apiVersion: apps/v1
kind: Deployment
metadata:
  name: cmd-args-example
spec:
  selector:
    matchLabels:
      app: cmd-args-example
  template:
    metadata:
      labels:
        app: cmd-args-example
    spec:
      containers:
        - name: add2numbers
          image: raje/add2numbers
          command: [ "java", "org.raj.nola.AddTwoNumbers" ]
          args: [ "10", "20" ]

• Equivalent of ENTRYPOINT in docker is command in kubernetes and CMD is args.
  

Thank You !!