Ramesh NSoftware Engineer – Red Hat

Gluster and oVirt

GlusterFS MeetupFeb. 2015

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Agenda● About oVirt and Gluster

● Ovirt Gluster Integration

● Gluster Features

● Managing Gluster using oVirt

● Demo

● Upcoming Gluster features in oVirt

● Q & A

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Ovirt

oVirt is a virtualization platform oVirt is a virtualization platform to manage virtual machines, to manage virtual machines, storage and networksstorage and networks● Engine (ovirt-engine)Engine (ovirt-engine)

Manages the oVirt hosts, and Manages the oVirt hosts, and allows system administrators to allows system administrators to create and deploy new Vms. It also create and deploy new Vms. It also supports Gluster management.supports Gluster management.

● Host Agent (VDSM)Host Agent (VDSM)oVirt engine communicates with oVirt engine communicates with VDSM to manage the VMs, VDSM to manage the VMs, storages and networksstorages and networks

Clu

ster

s

Storage Server

Sto

rage

Eng

ine

Storage Server

Cluster Hosts

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Ovirt Architecture

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Gluster● GlusterFS is a general purpose scale-out distributed file-

system supporting thousands of clients● Aggregates storage exports over network interconnect to

provide a single unified namespace

● File-system completely in userspace, runs on commodity hardware

● Layered on disk file systems that support extended attributes

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oVirt Gluster Integration● Introduced in oVirt 3.1

● Supports Three ApplicationMode configuration

– 1 → Virtualization only

– 2 → Gluster only

– 255 → Virtualization + Gluster (default)

● Enable Gluster at cluster level

● New entities (Volumes, Bricks, Volume Options)

● VDSM verbs for gluster management

● vdsm-gluster plug-in

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Features supported in Ovirt● Cluster Management

● Create Gluster Cluster

● Add / Remove Storage Servers

● Delete Cluster

● Volume Management

● Create / Remove Volume

● Start / Stop Volume

● Add / Remove (with migration) bricks

● Re-balancing Volume

● Profiling

● Managing hookshttp://www.ovirt.org/Features/Gluster_Support

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Managing Gluster in oVirt 1/2

● Gluster Service support is located in the Cluster properties

● Deploy Hosts with GlusterFS Server support

● Enable Bricks and Volume Management from oVirt WebAdmin and REST-API

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Managing Gluster in oVirt 2/2● It is possible to create and manage Gluster Volumes

from WebAdmin and using the REST-API

● Volume Profiling

● Volume Capacity Monitoring

● Re-balancing Volume

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Demo

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Upcoming Features in oVirt 3.6

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Disk Management● Identify available disks and storage devices

● Create new bricks by creating new Logical Volumes (Thin LVs)

● Format the logical volume with the XFS file-system and manage fstab entries

http://www.ovirt.org/Features/GlusterHostDiskManagement

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Gluster Snapshot

● Supports Volume Snapshot related operations

● Snapshot configurations at Volume level as well as Cluster level

● Supports Snapshot scheduling to take repeated snapshots based on the time interval

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Geo Replication

● Enables creation and maintenance of Geo-Replication sessions across clusters

http://www.ovirt.org/Features/Gluster_Geo_Replication

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Storage Network Selection

● Currently, Gluster nodes use the same network for both Management and Gluster traffic (possibly causing traffic chokes)

● The proposed solution is to separate out the GlusterFS traffic and management traffic

VM

s an

d S

tora

geE

ngin

eDirect-attached storage (SAS/SATA)

http://www.ovirt.org/Features/Select_Network_For_Gluster

Feb 9, 2015 GlusterFS Meetup

Q&A

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References

devel@ovirt.org

#ovirt irc.oftc.net

Links:

http://www.gluster.orghttp://www.ovirt.org/OVirt_Administration_Guidehttp://community.redhat.com/blog/2014/05/ovirt-3-4-glusterized/http://blogs-ramesh.blogspot.in/2014/12/deploying-gluster-using-ovirt.html

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THANK YOU!

devel@ovirt.org

#ovirt irc.oftc.net