(production) 

app:myapp1
 hosts: host1,host2
 path: /path/to/deployment
 ...other metadata...
 
app:myapp2
 hosts: host3,host4
 path: /path/to/deployment2
 ...other metadata...



(staging) 

app:myapp1
 hosts: host5,host6
 path: /path/to/deployment
 ...other metadata...
 
app:myapp2
 hosts: host7,host8
 path: /path/to/deployment
 ...other metadata...