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bbfa235
(Get the code!)
Here is the blueprint [0] we are going to implement in Fuel 6.1. Briefly, there will be a separate role for Cinder-VMDK service. It'll have a better disk allocation than simple 'cinder' role. A user can combine the new role with any (or almost any) other roles, for instance with Ceph. So, we are going to improve an experience with Cinder+VMDK in Fuel 6.1. I personally like the idea proposed by Andrew in his patch-set, but I'm pretty sure we'll refactor cluster_ha.pp. So, maybe it's better to wait two more weeks until we'll manage to merge first parts of a refactored code. Anyway, I like the idea to have the 'host' parameter modified in upstream manifests.
About Fuel 5.1 and 6.0.
Andrew's patch-set can be applied to these releases. Anyway, we need to document such tricky behavior (a separate role must be assigned somewhere and some space can be wasted) in UserGuide and maybe add some warnings on UI. I think, it should be enough for 5.1 and 6.0.
[0] https:/