guide/blueprints/example_yaml/vanilla-bash-netcat-port-parameter.yaml

name: Netcat Example with Parameter
location: localhost
services:
- type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
  name: Simple Netcat Server
  brooklyn.config:
    launch.command: |
      echo $MESSAGE | nc -l $NETCAT_PORT &
      echo $! > $PID_FILE

    shell.env:
      MESSAGE: $brooklyn:config("message")
      NETCAT_PORT: $brooklyn:attributeWhenReady("netcat.port")
  
  brooklyn.parameters:
  - name: message
    description: a message to send to the caller
    default: hello
  - name: netcat.port
    type: port
    description: the port netcat should run on
    default: 4321+