YAML: override properties in nested array - configuration

Question

My YAML file contains few services which are identical except for few properties and here is the example
services:
- name: SERVICE_NAME1
connect_timeout: 60000
host: HOST_NAME1
port: 443
protocol: https
read_timeout: 60000
retries: 5
write_timeout: 60000
routes:
- hosts:
- ROUTE_HOST1
name: ROUTE_NAME1
preserve_host: false
protocols:
- http
- https
strip_path: false
https_redirect_status_code: 426
plugins:
- name: plugin1
- name: plugin2
- name: SERVICE_NAME2
connect_timeout: 60000
host: HOST_NAME2
port: 443
protocol: https
read_timeout: 60000
retries: 5
write_timeout: 60000
routes:
- hosts:
- ROUTE_HOST2
name: ROUTE_NAME2
preserve_host: false
protocols:
- http
- https
strip_path: false
https_redirect_status_code: 426
plugins:
- name: plugin1
- name: plugin2
Is it possible to have a template for the service and then reuse it and set the SERVICE_NAME, HOST_NAME, ROUTE_HOST, ROUTE_NAME for the particular service using only YAML capabilities?

Answer 1

Yes sure – you can use any templating engine for that. For example mustache:
test.yaml
services:
{{#services}}
- name: {{name}}
connect_timeout: 60000
host: {{host}}
port: 443
protocol: https
read_timeout: 60000
retries: 5
write_timeout: 60000
routes:
- hosts:
- {{route.host}}
name: {{route.name}}
preserve_host: false
protocols:
- http
- https
strip_path: false
https_redirect_status_code: 426
plugins:
- name: plugin1
- name: plugin2
{{/services}}
input.yaml
services:
- name: service
host: host
route: {host: rhost, name: rname}
usage
$ mustache input.yaml test.yaml
output
services:
- name: service
connect_timeout: 60000
host: host
port: 443
protocol: https
read_timeout: 60000
retries: 5
write_timeout: 60000
routes:
- hosts:
- rhost
name: rname
preserve_host: false
protocols:
- http
- https
strip_path: false
https_redirect_status_code: 426
plugins:
- name: plugin1
- name: plugin2