When dealing with Kubernetes, backing up an application's data is not as straightforward as when the application is installed directly on your system. Due to its design, Kubernetes orchestrates applications to make them resilient by horizontally scaling them as needed and restarting them upon failure. This often results in applications being started or restarted on different worker nodes in an unpredictable manner.
Moreover, it is often not possible to attach a container for running the backup process to an already running pod. Given these factors, it is clear that backing up applications on Kubernetes introduces additional challenges. Kubernetes Backup - perform Gitea backup on S3 with MinIO shows how to run backups of Kubernets workloads, providing as example how to backup Gitea on S3.