The Gluster Community would like to congratulate the OpenStack Foundation and
developers on the Havana release. With performance-boosting enhancements for
OpenStack Block Storage (Cinder), Compute (Nova) and Image Service (Glance), as
well as a native template language for OpenStack Orchestration (Heat), the
OpenStack Havana release points the way to continued momentum for the OpenStack
community. The many storage-related features in the Havana release coupled with
the growing scope of typical OpenStack deployments demonstrate the need for
scale-out, open software-defined storage solutions. The fusion of GlusterFS
open software-defined storage with OpenStack software is a match made in cloud
heaven.
Naturally, the Gluster Community would like to focus on OpenStack enhancements
that pertain directly to our universe:
OpenStack Image Service (Glance)
- OpenStack Cinder can now be used as a block-storage back-end for the
Image Service. For Gluster users, this means that Glance can point to the same
image as Cinder, which means it is not necessary to copy the entire image
before deploying, saving some valuable time.
OpenStack Compute (Nova)
- OpenStack integration with GlusterFS utilizing the QEMU/libgfapi
integration reduces the kernel space to user space context switching to
significantly boost performance.
- When connecting to NFS or GlusterFS backed volumes, Nova now uses the
mount options set in the Cinder configuration. Previously, the mount options
had to be set on each Compute node that would access the volumes. This allows
operators to more easily automate the scaling of their storage platforms.
- QEMU-assisted snapshotting is now used to provide the ability to
create cinder volume snapshots, including GlusterFS.
OpenStack Orchestration (Heat)
- Initial support for native template language (HOT). For OpenStack
operators, this presents an easier way to orchestrate services in application
stacks.
OpenStack Object Storage (Swift)
- There is nothing in the OpenStack Havana release notes pertaining to
GlusterFS and Swift integration but we always like to talk about the fruits of
our collaboration with Swift developers. We are dedicated to using the upstream
Swift project API/proxy layer in our integration, and the Swift team has been a
pleasure to work with, so kudos to them.
OpenStack Data processing (Savanna - incubating at
https://wiki.openstack.org/wiki/Savanna)
- This incubating project enables users to easily provision and manage
Apache Hadoop clusters on OpenStack. It’s a joint project between Red Hat,
Mirantis and HortonWorks and points the way towards "Analytics as a Service."
It's not an official part of OpenStack releases yet, but it's come very far
very quickly, and we're excited about the data processing possibilities as it
matures.
To give an idea of the performance improvements in the GlusterFS-QEMU
integration that Nova now takes advantage of, consider the early benchmarks
published by Bharata Rao, a developer at IBM’s Linux Technology Center, at his
blog:
http://raobharata.wordpress.com/2012/10/29/qemu-glusterfs-native-integration/
Below is a snapshot to show the difference between the Havanna and Grizzly
releases, respective of GlusterFS.
Grizzly
Glance - Could point to the filesystem images mounted with GlusterFS, but had
to copy VM image to deploy it
Cinder - Integrated with GlusterFS, but only with Fuse mounted volumes
Nova - No integration with GlusterFS
Swift - GlusterFS maintained a separate repository of changes to Swift proxy
layer
Havana
Glance - Can now point to Cinder interface, removing the need to copy image
Cinder - Can now use libgfapi-QEMU integration for KVM hypervisors
Nova - Can now use the libgfapi-QEMU integration
Swift -Patches now merged upstream, providing a cleaner break between API and
implementation
The Orchestration feature we are excited about is not Gluster-specific, but has
several touch points with GlusterFS, especially in light of the
newly-introduced Manila FaaS project for OpenStack
(https://launchpad.net/manila). Imagine being able to orchestrate all of your
storage services with Heat, building the ultimate in scale-out cloud
applications with open software-defined storage that scales with your
application as needed.
We're very excited about the Havana release and look forward to working with
the global OpenStack community on this and future releases. Download the latest
GlusterFS version, GlusterFS 3.4, from the Gluster Community at
gluster.org/download, and check out the performance with a GlusterFS 3.4-backed
OpenStack cloud.
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