ytt data/values example

iad_default.yaml

#@data/values
---                                                                                                          
pop:
  name: iad #! this is configured and meant to be reusable by anyone that needs iad specific data

nodes:
  foo:
    autostart: true
    pop: #! I want this value to be overridden from an overlay OR be able to reference pop.name from above    
  bar:
    autostart: true
    pop:

overlay.yaml

#@data/values
---                                                                                                          
nodes:
  foo:
    autostart: true                                                                                              
    pop: par #! data.values.pop.name <-- I'd like to use this reference here                                   
  bar:
    autostart: false
    pop: iad #! data.values.pop.name

run.sh

#!/bin/bash
./ytt -f iad_default.yaml  -f overlay.yaml -f sample.tmpl.yaml

sample.tmpl.yaml

#@ load("@ytt:data", "data")
                                                                                                             nodes:
  foo:
    pop: #@ data.values.nodes.foo.pop