[Engine-devel] Proposal for support ISO domain on other types of file based storage.

[Mark Wu]

Hi guys,

Currently, ISO domain is only supported on NFS storage.  It could 
improve the ease of use if it allows other types
of file based storage to store ISO images. After an investigation, I 
found there's not any restriction on this idea.
So the whole work is removing the limitation on engine side.  That means 
engine should allow ISO domain could
have different storage type from the data center it's attached, like 
what we do with nfs ISO domain in SAN DC.

I start this idea with localfs. I know local storage can't be seen in 
cluster level. But it also provides a choice if no
NFS available. VMs can be created on the host which has the ISO repo, 
and then be migrated to any other host in the cluster.
I have done the initial patches: allow creation ISO domain on localfs 
[1] and support import ISO domain on localfs [2]
I don't have much experience in java/j2ee/web development and engine 
architecture.  The patches just work for me.
I am not sure if it will bring some potential problems.  So any feedback 
on the patch or  the idea will be appreciated very much.


Mark.

[1] http://gerrit.ovirt.org/#/c/12687/
[2] http://gerrit.ovirt.org/#/c/12916/
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