values

Load structured data into a CUE value

CUE input file:

package kube

import "encoding/yaml"

values: {} @read(values.yaml)

configMap: "app-metadata": {
    apiVersion: "v1"
    kind:       "ConfigMap"
    data: {
        "about.html":  """
            <h1>Welcome to \(values.instance.hostname)
                \(values.instance.environment) environment!
            </h1>
            <i>\(values.instance.replicas) replicas configured</i>
            """
        "values-dump": yaml.Marshal(values)
    }
}

objects: [ for v in configMap {v}]

values.yaml:

instance:
  environment: production
  hostname: myapp.example.com
  replicas: 7

External structured data (YAML, JSON, .env) can be imported into a CUE value. It can be used like any regular CUE value.

• @read(values.yaml) imports structured data into values.

YAML output:

apiVersion: v1
kind: ConfigMap
data:
about.html: |2-
    <h1>Welcome to myapp.example.com
        production environment!
    </h1>
    <i>7 replicas configured</i>
values-dump: |
    instance:
    environment: production
    hostname: myapp.example.com
    replicas: 7