Open Stack

Jay Lau <jay.lau.513 at gmail.com> wrote on 04/27/2014 12:31:01 AM:

> I think server group is an important feature especially when working
> with heat auto scaling group, there is already some discussion for this 
> http://markmail.org/message/jl5wlx3nr3g53ko5

> The current server group feature does support add/delete a VM 
> instance to/from the server group but seems not able to manage 
> existing VM instances, but this can be enhanced.

> The server group feature need two steps to create the VM instance:
> 1) Create a server group with policy
> 2) Create VMs for the server group

> What Jay Pipes proposed is using resource tags directly:
> 1) Create VMs with a resource tag to specify the policy.

No, the tag contributes to the grouping; the policy is identified by the 
choice of command line switch (--affinity vs. --anti-affinity).

> I think that those two directions are very similar, but what Jay 
> Pipes proposed does not specify the resource group and seems the 
> resource group was implicitly specified in resource tag. 

In short, the proposal from Jay Pipes *does* have groups but their 
membership is declared in a different way than in the current server 
groups feature.  Jay's proposal is not really about *removing* server 
groups but rather it is a proposal to change their API.

Regards,
Mike
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