brooklyn-dns-bind-and-registration-sample.yaml

name: BIND demo

location: 
  ibm-bluebox-sng-pub 

brooklyn.config:
  # custom domain
  brooklyn_dns.domain: brooklyn.demo.local
  
  # use private subnet address (not public), both for DNS's IP put in resolv.conf and for nodes' IPs in DNS
  brooklyn_dns.address: $brooklyn:entity("brooklyn_dns-bind-server").attributeWhenReady("host.subnet.address")
  brooklyn_dns.hosts.address.sensor: host.subnet.address

services:

-
    # this is the DNS server
    type: brooklyn-dns-bind-server

-
    # and a sample server which uses the DNS server
    type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
    name: Sample Server which gets DNS

    # this is the magic which registers us with the DNS server above
    brooklyn.config:
      brooklyn_dns.enabled: true
      
    # this is the magic which makes us *use* the DNS server above
    brooklyn.children:
    - type: brooklyn-dns-registration-hook
    childStartMode: foreground
    
    # and now we (or anyone) can access it as follows
    
    shell.env:
      MY_HOST_BASENAME: $brooklyn:attributeWhenReady("entity.id")
      MY_HOST_DOMAIN: $brooklyn:config("brooklyn_dns.domain")
    
    # wait for DNS before launching
    launch.latch: $brooklyn:entity("brooklyn_dns-bind-server").attributeWhenReady("service.isUp")
      
    launch.command:
      echo "(just a sample; we're running if we can ping ourselves on the generated hostname)"
      
    checkRunning.command:
      ping -c 1 ${MY_HOST_BASENAME}.${MY_HOST_DOMAIN}

    # (you can also publish the full hostname for easier access, as done in brooklyn-dns-registration-hook)