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High availability storage with Gluster

Decided to give GlusterFS a try this week – it was a quick & painless install, and most of my hiccups are because I set up the environment in VirtualBox, and not on hardware. Overall, I am quite impressed at how simple the software is to setup, and like the flexibility that it seems to offer, as you can grow your “exported” volumes easily by adding physical disks to the storage nodes, in terms of “storage bricks”, and also how you can mount the storage in a very NFS-like style to your host systems.

I created 2 storage nodes VM’s, and a single host VM to attach to them for this example; this how-to is from the “How-To Forge” website (thanks!)

When I created the storage VM’s, I purposely made one of the nodes hard disks smaller than the other, just to see what the effect would be to the visible ; the effect of this action was assumed – our storage cluster disk size is the smallest available disk. Since this is a mirror, our 10gb and 12gb disk nodes only give you a total of 10gb usable, as we are essentially doing RAID1 mirroring on the storage nodes.

(You can see the node on the left has 10Gb, and the node on the right has 12Gb of disk storage assigned to it)

And this is what the two nodes in the top screen shot look like as a mounted file system on the host side.

Thats it for now – I will be easing this setup into production environments shortly, and will update this blog when completed.

Thanks for reading, and happy storage days!

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