Support for Volumes

[ddoowa]

Added Functionality to define volumes to attach the function pods to, also refactored the process to define secrets to re-use the same underlying function.

example volume definitions:

functions:
  my-function:
    handler: handler.myFunction
    volumes:
      - name: my-volume
        persistentVolumeClaim:
            claimName: my-volume
    volumeMounts:
      - mountPath: /foo/bar
         name: my-volume

[andresmgot]

Thanks for the PR @ddoowa!

I have a few suggestions, apart from that I think it's better to diverge as less as possible from the format that a pod expect for volumes. In particular I would suggest:

functions:
  my-function:
    handler: handler.myFunction
    volumes:
      - name: my-volume
        persistentVolumeClaim:
          claimName: my-volume
    volumeMounts:
      - mountPath: /foo/bar
        name: my-volume

That way it's easier for people to know the format and it's easier to use in the code (you don't need to parse and translate the information from the function spec).

[ddoowa]

Thanks for the PR @ddoowa!

I have a few suggestions, apart from that I think it's better to diverge as less as possible from the format that a pod expect for volumes. In particular I would suggest:

functions:
  my-function:
    handler: handler.myFunction
    volumes:
      - name: my-volume
        persistentVolumeClaim:
          claimName: my-volume
    volumeMounts:
      - mountPath: /foo/bar
        name: my-volume

That way it's easier for people to know the format and it's easier to use in the code (you don't need to parse and translate the information from the function spec).

@andresmgot That sounds even better, not sure why i didn't think of it, but i have now made the necessary changes to support this format, and addressed other comments, looking forward to the merge.

[andresmgot]

Great, thanks for the changes!