[kwok] Provided service for port-forward

[wzshiming]

# Match pods
kind: ClusterPortForward
apiVersion: kwok.x-k8s.io/v1alpha1
metadata:
  name: cluster-port-forward-rules
spec:
  selector:
    matchNamespaces:
      - podNamespace
    matchNames:
      - podName
  forwards: []
--- 
# Just for a Pod
kind: PortForward
apiVersion: kwok.x-k8s.io/v1alpha1
metadata:
  name: podName
  namespace: podNamespace
spec:
  # This is the list of ports that will be forwarded
  forwards:

    # match the port 8001 forwards to the targetAddress:targetPort
    - ports:
        - 8001
      target:
        port: 80
        address: localhost

    # match the port 8002 forwards with the stdin/stdout of nc
    - ports:
        - 8002
      command:
        - nc
        - localhost
        - '80'

    # match the port 8003 forwards with the stdin/stdout of kubectl
    - ports:
        - 8003
      command:
        - kubectl
        - exec
        - -i
        - -n
        - podNamespace
        - podName
        - -c
        - podContainer
        - --
        - nc
        - localhost
        - '80'

    # match the port 8004 forwards with the stdin/stdout of docker
    - ports:
        - 8004
      command:
        - docker
        - exec
        - -i
        - container
        - nc
        - localhost
        - '80'

    # the ports is not set and will be the default
    - target
        port: 80
        address: localhost

[nikola-jokic]

/assign