helm-external-secrets/docs/snippets/template-v2-from-secret.yaml

{% raw %}
# define your template in a config map
apiVersion: v1
kind: ConfigMap
metadata:
  name: grafana-config-tpl
data:
  config.yaml: |
    datasources:
      - name: Graphite
        type: graphite
        access: proxy
        url: http://localhost:8080
        password: "{{ .password }}"
        user: "{{ .user }}"
---
apiVersion: external-secrets.io/v1beta1
kind: ExternalSecret
metadata:
  name: my-template-example
spec:
  # ...
  target:
    name: secret-to-be-created
    template:
      engineVersion: v2
      templateFrom:
      - configMap:
          # name of the configmap to pull in
          name: grafana-config-tpl
          # here you define the keys that should be used as template
          items:
          - key: config.yaml
  data:
  - secretKey: user
    remoteRef:
      key: /grafana/user
  - secretKey: password
    remoteRef:
      key: /grafana/password
{% endraw %}