OpenEBS

OpenEBS is open-source Kubernetes storage software for developers and platform SREs running stateful workloads. It turns storage on Kubernetes worker nodes into local or distributed persistent volumes, with engines for Replicated PV Mayastor and local Hostpath, LVM, ZFS, and experimental Rawfile volumes. Mayastor can synchronously replicate volumes across Kubernetes zones, while Kubernetes-native operations support copy-on-write snapshots and clones. Velero plugins provide 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 operates in userspace rather than relying on Linux kernel-dependent software, and exposes declarative APIs through Kubernetes custom resources. It can be installed with Helm 3.2 or newer. Mayastor disk pools support data-at-rest encryption with user-defined AES-XTS keys, but are limited to one block device and encryption keys cannot be rotated. Stated use cases include self-managed databases, observability stacks, CI/CD, object storage, websites, and ML pipelines on Kubernetes.

OpenEBS provides Kubernetes-native volume, replication, snapshot, and backup capabilities. Note the Mayastor device and key-rotation limits when evaluating its storage design.

OpenEBS suits developers and platform SREs managing stateful Kubernetes workloads, including databases, observability stacks, and CI/CD systems. It is designed for self-managed storage deployments.

OpenEBS is open-source storage software for persistent volumes in Kubernetes. It best suits developers and platform SREs running stateful workloads who want storage managed through Kubernetes. Its range of local and replicated volume engines is compelling, though Mayastor’s device and key-rotation limits deserve attention.

Overview

OpenEBS turns storage on Kubernetes worker nodes into local or distributed persistent volumes, with Kubernetes orchestrating its volume services. It runs entirely in userspace, which suits teams seeking storage software that does not depend on Linux kernel-specific components. Declarative Kubernetes custom resources give platform teams a familiar way to manage volumes alongside workloads.

The project was built by MayaData, donated to the Cloud Native Computing Foundation, and is now a CNCF sandbox project. OpenEBS describes itself as 100% open source. Installation uses Helm 3.2 or newer; the default chart installs Hostpath, LVM, ZFS, and Replicated Storage.

Key features

Local and replicated storage

OpenEBS v4.6 includes Local PV Hostpath, LVM, and ZFS, experimental Local PV Rawfile, and Replicated PV Mayastor. This range lets teams choose local storage for workloads that need volumes on worker nodes, or Mayastor when synchronous replication across Kubernetes zones supports a high-availability design. Rawfile remains experimental, so it is a less established choice for production storage.

Mayastor DiskPools currently support only one block device, and data-encryption keys cannot be rotated. Those constraints can rule out a desired pool layout or complicate key-management policies. Mayastor supports data-at-rest encryption with user-defined AES-XTS keys, but that does not remove the key-rotation limitation.

Snapshots, backup, and monitoring

Copy-on-write snapshots and clones use Kubernetes-native kubectl operations, which keeps these tasks close to the tools teams already use to manage Kubernetes. For backup and restore, OpenEBS works with Velero plugins and can target AWS S3, GCP Object Storage, or MinIO.

Volume metrics include IOPS, throughput, latency, and traffic patterns for Prometheus and Grafana monitoring. OpenEBS also documents integrations with Alert Manager, ELK, Loki, Logstash, OpenShift, EKS, DigitalOcean, Rancher, MicroK8s, and KubeSphere. This breadth helps teams fit storage into common monitoring and Kubernetes environments; the listed integrations do not by themselves establish that every deployment will be turnkey.

Security and support

Mayastor supports TLS on its public REST API, while plaintext communication is the default. JWT authentication and internal TLS are planned. Teams that require encrypted internal traffic or JWT authentication should account for those gaps in their security design.

DataCore offers support services led by program managers and engineers with Certified Kubernetes Administrator and Developer qualifications. That gives teams a route to professional support alongside the open-source project.

Pricing

OpenEBS open source costs nothing. The plan includes Hostpath, LVM, ZFS, Rawfile, and Replicated PV Mayastor volume types, plus snapshots and multi-attach. It is a strong fit for teams comfortable operating open-source Kubernetes storage without a paid license. There is no paid tier in this plan to add features; DataCore offers support services separately.

Platforms

OpenEBS supports API use, Linux, and self-hosted deployment. Its kubectl plugin is available for Linux, a practical constraint for teams that rely on that plugin from other operating systems.

Who it's for

OpenEBS is aimed at developers and platform SREs managing stateful Kubernetes workloads. Its use cases include self-managed databases, observability stacks, CI/CD, object storage, scalable websites, and ML pipelines. Teams that want Kubernetes-native volume operations, snapshots, and replication can choose an engine suited to each workload. Those needing multi-device Mayastor DiskPools, rotatable data-encryption keys, or secure-by-default internal communication should weigh the stated limitations carefully.

Pros and cons

• Pros: Local and replicated engines cover a range of Kubernetes storage needs, including synchronous replication across zones.
• Pros: Kubernetes-native snapshots and clones, Velero backup integrations, and Prometheus and Grafana metrics support familiar operational workflows.
• Pros: The open-source plan includes all listed volume types, snapshots, and multi-attach at no cost.
• Cons: Mayastor DiskPools are limited to one block device, and encryption keys cannot be rotated.
• Cons: Mayastor communication defaults to plaintext; JWT authentication and internal TLS are planned.
• Cons: Local PV Rawfile is experimental, and the kubectl plugin is Linux-only.

Alternatives

Choose Ceph if you want free, open-source distributed storage across Linux, Windows, and self-hosted environments; block storage requires a running Ceph cluster. SeaweedFS is a freemium option with a free Community support plan for any cluster size, GitHub issues and discussions, and public documentation, but no guaranteed response time.

VMware Workstation Pro is free for Linux or Windows hosts and targets 64-bit Intel or AMD PCs, making it an alternative for that host-based environment. Gluster is another free, open-source option for Linux and self-hosted use.

JuiceFS offers a self-hosted Community Edition with GitHub and Discord community support, alongside a freemium cloud service. MinIO AIStor has a free single-node plan with its full feature set, though redistribution is prohibited. MooseFS has a free GPLv2 Community plan with a single active master and single-parity erasure coding. StarWind Virtual SAN offers a free, self-supported plan with functionality limitations; its Linux KVM version may have no limitations.

Browse Software-Defined Storage Software and Storage Replication Software for more options.

Verdict

Choose OpenEBS if you run stateful Kubernetes workloads and want free, open-source volume services managed through Kubernetes, with local engines, synchronous replication, snapshots, and Velero backup. Look elsewhere if your storage design depends on multi-device Mayastor pools, rotatable encryption keys, or internal TLS by default.