Open Stack

On 02/23/2016 06:22 AM, Yngvi Páll Þorfinnsson wrote:
> Hi
>
> How can I choose a particular flotating IP for an instance?
>
> I just released an floating IP from an tenant, but would like to
> associate this particular IP , with another instance.
>
> It‘s not in use, when I list all floating IP‘s , it does not appear in
> the list:
>
> neutron floatingip-list | grep IP

I'm not familiar with a command way to request a specific floating IP 
(eg 1.2.3.4) out of the pool(s).  Once you delete a given floating IP, 
it goes back into the free pool, at least after a fashion - as part of 
what I recall is an effort to minimize overheads, it won't actually 
come-up for allocation again until the allocations have cycled through 
all the addresses ahead/behind it.  So, if the pool was IPs:

1 2 3 4

And you happened to get "2" but then deleted that floater, "2" will not 
be allocated again until 3, 4 and 1 have been allocated (and perhaps 
freed).  Allocation goes in a big circle.

If you want to move a floating IP from one instance to another, you 
should just disassociate the floating IP, not also delete it.  Then the 
floating IP remains allocated to your project (IIRC we are all supposed 
to start calling them projects not tenants...) and you can then 
associate the IP with a port belonging to another instance.

rick jones

>
> I‘ve been trying some nova and neturon cmd‘s but without success.
>
> Here is an example of error:
>
> root at opst-ctrl1-dev:/# nova floating-ip-associate
> c8443770-276e-44ce-b79d-32965db9465b IP
>
> ERROR (NotFound): floating ip not found (HTTP 404) (Request-ID:
> req-1ed31433-2cc3-4e36-ad4c-fc992518baae)
>
> nova floating-ip-pool-list
>
> works fine, and I can see 6 differnt floating ip pools.
>
> It would be nice, if someone can post a cmd procedure for this.
>
> Best regards
>
> Yngvi
>
>
>
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