I learned of Ceph only a few weeks ago, think the concept is really cool.
I wanted to try my hand at it, but did not want to try setting it all up with VM boxes.
So I put together a system using 7 physical nodes, using little ARM based computers.
I got four Banana Pi, which have one SATA port, 1gb of ram. Boots of 8gb SD card. These are Ceph OSD nodes with 3tb hard drives.
I got three ODROID-C2 units to use as Ceph mon, 2gb of ram, 8gb SD cards for booting and 64gb of eMMC memory.
I got a basic cluster up, but things go bad quick. I can't keep the OSD nodes up, the OSD logs look like mumbo jumbo to me for the most part.
Photo of the little setup available here if you are interested.
I learned a few things and am going to blow everything away and start again.
One question I have for the group is this.
Do you really need to make an entry in ceph.conf telling the cluster of the location of each osd.X ?
[osd.1]
host = node-01
[osd.2]
host = node-02
[osd.3]
host = node-03
I used ceph-deploy to set everything up and it did not add these entries. I have seen online some people mention it, some people do not. I looked up some sample ceph.conf and some have it and some do not.
Seems like adding that would be a major PITA anytime you make a change to the cluster you would need to update that file on all nodes.
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