Computer-implemented methods, media, and systems for automatic discovery of application resources for application backup in a container orchestration platform (e.g., a Kubernetes system) are disclosed. In an example method, a pod of an application deployed in a container orchestration platform is identified. Then an owner object of the pod is determined. Resources mounted on the pod and on the owner object of the pod in the container orchestration platform are checked. Based on the pod, the owner object of the pod, and the resources mounted on the pod and on the owner object of the pod, a resource hierarchy of the application is constructed. A backup specification for backup of the application is identified. Based on the backup specification and the resource hierarchy of the application, resources of the application are backed up.