...The project extends the Kubernetes API by adding an ExternalSecrets object using Custom Resource Definition and a controller to implement the behavior of the object itself. An ExternalSecret declares how to fetch the secret data, while the controller converts all ExternalSecrets to Secrets. The conversion is completely transparent to Pods that can access Secrets normally. By default Secrets are not encrypted at rest and are open to attack, either via the etcd server or via backups of etcd data.