Obstor vs OpenEBS

Obstor is an Apache 2.0-licensed, S3-compatible object storage server with built-in SFTP support. It works with S3 SDKs, command-line tools, and applications without code changes. In distributed deployments, objects are sharded and replicated across connected nodes, with each object kept in at least two global locations. Its native SFTP server stores uploaded files as S3 objects. Data features include SSE-C and SSE-S3 server-side encryption with KMS integration, configurable erasure coding for drive and node failures, and object versioning with lifecycle policies. IAM controls use users, groups, policies, and service accounts with S3 and AWS IAM policy syntax. Event notifications can be sent to Kafka, NATS, AMQP, Redis, PostgreSQL, Elasticsearch, and webhooks. Installation options include a single binary, Docker, a Kubernetes Helm chart, or building from source. Standalone instructions cover macOS, GNU/Linux, and 64-bit Windows. Standalone servers are intended for development and evaluation; versioning, object locking, and bucket replication require distributed deployment with erasure coding.

OpenEBS is open-source Kubernetes storage software for developers and platform SREs deploying stateful workloads. It turns storage on Kubernetes worker nodes into local or distributed persistent volumes and operates in userspace rather than relying on Linux kernel-dependent software. Its engines include Replicated PV Mayastor and local volumes using Hostpath, LVM, ZFS, or experimental Rawfile. Mayastor can synchronously replicate volumes across Kubernetes zones. Kubernetes-native operations provide copy-on-write snapshots and clones, while Velero plugins support backup and restore to AWS S3, GCP Object Storage, or MinIO. Volumes expose metrics including IOPS, throughput, latency, and traffic patterns for Prometheus and Grafana. OpenEBS also exposes declarative APIs through Kubernetes custom resources and can be installed with Helm 3.2 or newer. Mayastor disk pools support data-at-rest encryption with user-defined AES-XTS keys. Listed use cases include self-managed databases, observability stacks, CI/CD, object storage, websites, and ML pipelines. Mayastor DiskPools are limited to one block device, and encryption keys cannot be rotated.