Garage Operator: Kubernetes Native S3-Compatible Object Storage for Self-Hosting

The Garage Operator, an open-source project, introduces a robust solution for deploying S3-compatible object storage directly on Kubernetes. This operator is specifically designed for self-hosting scenarios, enabling users to manage a distributed storage system with ease. Key features include declarative cluster lifecycle management, where StatefulSets, configurations, and storage layouts are handled via Custom Resource Definitions (CRDs). The system unifies storage and gateway tiers within a single `GarageCluster` CRD, allowing for the combination of durable storage pods and ephemeral S3 proxies. This integration streamlines the deployment process and operational overhead. Furthermore, the operator provides comprehensive bucket and key management, allowing users to create buckets, set quotas, and provision S3 credentials using `kubectl`. One of the standout features is its support for multi-cluster federation, which enables the distribution of storage across multiple Kubernetes clusters with automatic node discovery. This enhances scalability and resilience for geographically dispersed deployments. The gateway pods maintain persistent identities through StatefulSets with small metadata PVCs, ensuring consistent node identities across restarts. Additionally, the Garage Operator includes a COSI driver for Kubernetes-native object storage provisioning, and supports scaling through `kubectl scale` as well as Vertical Pod Autoscaling (VPA) and Horizontal Pod Autoscaling (HPA) for `GarageCluster` resources. This makes it a flexible and powerful tool for those looking to implement their own S3-compatible object storage within a Kubernetes ecosystem.