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.
Rook is in alpha state. We're just getting started. Not all planned features 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.
Here's the quickest way to get going with Rook.
On a modern Linux host run the following:
-
Download the latest binaries
$ wget https://github.com/rook/rook/releases/download/v0.2.2/rook-v0.2.2-linux-amd64.tar.gz $ tar xvf rook-v0.2.2-linux-amd64.tar.gz
-
Start a one node Rook cluster
$ ./rookd --data-dir /tmp/rook-test
-
In a different shell (in the same path) create a new volume image (10MB)
$ ./rook block create --name test --size 10485760
-
Mount the block volume and format it
sudo ./rook block mount --name test --path /tmp/rook-volume sudo chown $USER:$USER /tmp/rook-volume
-
Write and read a file
echo "Hello Rook!" > /tmp/rook-volume/hello cat /tmp/rook-volume/hello
-
Cleanup
sudo ./rook block unmount --path /tmp/rook-volume
-
Create a shared file system
./rook filesystem create --name testFS
-
Verify the shared file system was created
./rook filesystem ls
-
Mount the shared file system from the cluster to your local machine
./rook filesystem mount --name testFS --path /tmp/rookFS sudo chown $USER:$USER /tmp/rookFS
-
Write and read a file to the shared file system
echo "Hello Rook!" > /tmp/rookFS/hello cat /tmp/rookFS/hello
-
Unmount the shared file system (this does not delete the data from the cluster)
./rook filesystem unmount --path /tmp/rookFS
-
Cleanup the shared file system from the cluster (this does delete the data from the cluster)
./rook filesystem delete --name testFS
-
Create an object storage instance in the cluster
./rook object create
-
Create an object storage user
./rook object user create rook-user "A rook rgw User"
-
Get the connection information for accessing object storage
eval $(./rook object connection rook-user --format env-var)
-
Use an S3 compatible client to create a bucket in the object store
s3cmd mb --no-ssl --host=${AWS_ENDPOINT} --host-bucket= s3://rookbucket
-
List all buckets in the object store
s3cmd ls --no-ssl --host=${AWS_ENDPOINT} --host-bucket=
-
Upload a file to the newly created bucket
echo "Hello Rook!" > /tmp/rookObj s3cmd put /tmp/rookObj --no-ssl --host=${AWS_ENDPOINT} --host-bucket= s3://rookbucket
-
Download and verify the file from the bucket
s3cmd get s3://rookbucket/rookObj /tmp/rookObj-download --no-ssl --host=${AWS_ENDPOINT} --host-bucket= cat /tmp/rookObj-download
To run a Kubernetes cluster with Rook for persistent storage go here
Rook is also easy to run on CoreOS either directly on the host or via rkt.
cd demo/vagrant
vagrant up
See Building in the wiki for more details.
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 not 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 to store configuration and coordinate cluster-wide management operations. rookd
will automatically
bootstrap Etcd, manage it, and scale it as the cluster grows. It's also possible to use an external Etcd instead of the embedded one
if needed.
Rook and etcd are implemented in golang. Ceph is implemented in C++ where the data path is highly optimized. We believe this combination offers the best of both worlds.
See Design wiki for more details.
We welcome contributions. See Contributing to get started.
For filing bugs, suggesting improvements, or requesting new features, help us out by opening an issue.
Please use the following to reach members of the community:
- Email: rook-dev
- Gitter: rook/rook for general project discussions or rook-dev for development discussions.
- Twitter: @rook_io
Rook and Etcd are under the Apache 2.0 license. Ceph is mostly under the LGPL 2.0 license. Some portions of the code are under different licenses. The appropriate license information can be found in the headers of the source files.