helm-external-secrets/docs/snippets/multiline-template-external-secret.yaml

{% raw %}
apiVersion: external-secrets.io/v1alpha1
kind: ExternalSecret
metadata:
  name: template
spec:
  refreshInterval: 1h
  secretStoreRef:
    name: secretstore-sample
    kind: SecretStore
  target:
    name: secret-to-be-created
    # this is how the Kind=Secret will look like
    template:
      type: kubernetes.io/tls
      data:
        # multiline string
        config: |
          datasources:
          - name: Graphite
            type: graphite
            access: proxy
            url: http://localhost:8080
            password: "{{ .password | toString }}" # <-- convert []byte to string
            user: "{{ .user | toString }}"         # <-- convert []byte to string

  data:
  - secretKey: user
    remoteRef:
      key: /grafana/user
  - secretKey: password
    remoteRef:
      key: /grafana/password
{% endraw %}