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

{% raw %}
apiVersion: external-secrets.io/v1beta1
kind: ExternalSecret
metadata:
  name: template
spec:
  # ...
  target:
    template:
      type: kubernetes.io/tls
      engineVersion: v2
      data:
        ca.crt: "{{ .mysecret | filterPEM "CERTIFICATE" | filterCertChain "intermediate" }}"
        tls.crt: "{{ .mysecret | filterPEM "CERTIFICATE" | filterCertChain "leaf" }}"
        tls.key: "{{ .mysecret | filterPEM "PRIVATE KEY" }}"

{% endraw %}