rook-old

README

Open, Cloud Native, and Universal Distributed Storage

• What is Rook?
• Status
• Quickstart
• Building
• Design
• Contributing
• Contact
• Licensing

What is Rook?

Rook is a distributed storage system designed for cloud native applications. It exposes file, block, and object storage on top of shared resource pools. Rook has minimal dependencies and can be deployed in dedicated storage clusters or converged clusters. It's self-managing, self-protecting, self-healing, and is designed to just work without teams of engineers managing it. It scales from a single node, to multi-PB clusters spread geographically. It's based on the Ceph project with over 10 years of production deployments in some of the largest storage clusters in the world.

Status

Rook is in alpha state. We're just getting started. Not all planned feature are complete. The API and other user-facing objects are subject to change. Backward-compability is not supported for this release. See our Roadmap and Issues. Please help us by Contributing to the project.

Quickstart

Here's the quickest way to get going with Rook.

Linux

On a modern Linux host run the following:

1. Download the latest binaries

$ wget https://github.com/rook/rook/releases/download/v0.0.6/rook-v0.0.6-linux-amd64.tar.gz
$ tar xvf rook-v0.0.6-linux-amd64.tar.gz

1. Start a one node Rook cluster

$ ./rookd --data-dir /tmp/rook-test

1. Now in a different shell (in the same path) create a new volume image (10MB)

$ ./rook block create --name test --size 10485760

1. Mount the block volume and format it

sudo ./rook block mount --name test --path /tmp/rook-volume

1. Write and read a file

echo "Hello Rook!" > /tmp/rook-volume/hello
cat /tmp/rook-volume/hello

Kubernetes

To run a Kubernetes cluster with Rook for persistent storage go here

CoreOS

Rook is also easy to run on CoreOS either directly on the host or via rkt.

cd demo/vagrant
vagrant up

Building

See Building in the wiki for more details.

Design

A rook cluster is made up of one or more nodes each running the Rook daemon rookd. Containers and Pods can mount block devices and filesystems exposed by the cluster, or can use S3/Swift API for object storage. There is also a REST API exposed by rookd as well as a command line tool called rook.

The Rook daemon rookd is a single binary that is self-contained and has all that is needed to bootstrap, scale and manage a storage cluster. rookd is typically compiled into a single static binary (just like most golang binaries) or a dynamic binary that takes a dependency on mostly libc. It can run in minimal containers, alongside a hypervisor, or directly on the host on most Linux distributions.

rookd uses an embedded version of Ceph for storing all data -- there are no changes to the data path. An embedded version of Ceph was created specifically for Rook scenarios and has been pushed upstream. Rook does attempt to maintain full fidelity with Ceph, for example, most of the Ceph concepts like OSDs, MONs, placement groups, etc. are hidden. Instead Rook creates a much simplified UX for admins that is in terms of physical resources, pools, volumes, filesystems, and buckets.

rookd embeds Etcd within the cluster store configuration, and coordinates cluster-wide management operations. rookd will automatically bootstrap Etcd, manage it, and scale it as the cluster grows. Its also possible to use an external Etcd instead of the embedded one if needed.

Rook and etcd are implementd in golang. Ceph is implemented in C++ where the data is highly optimized. We believe the combination offers the best of both worlds.

See Design wiki for more details.

Contributing

We welcome contributions. See Contributing to get started.

Report a Bug

For filing bugs, suggesting improvements, or requesting new features, help us out by opening an issue.

Contact

Please use the following to reach members of the community:

• Email: rook-dev
• Gitter: rook-dev

Licensing

Rook is under the Apache 2.0 license.

Documentation

Overview

Copyright 2016 The Rook Authors. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.