Open Stack

Hi Marcus,

On 2017/02/17 15:05, Marcus Furlong wrote:
> On 17 February 2017 at 16:47, Rikimaru Honjo
> <honjo.rikimaru at po.ntts.co.jp> wrote:
>> Hi all,
>>
>> I found and reported a unkind behavior of "openstack server migrate" command
>> when I maintained my environment.[1]
>> But, I'm wondering which solution is better.
>> Do you have opinions about following my solutions by operating point of
>> view?
>> I will commit a patch according to your opinions if those are gotten.
>>
>> [1]https://bugs.launchpad.net/python-openstackclient/+bug/1662755
>> ---
>> [Actual]
>> If user run "openstack server migrate --block-migration <UUID>",
>> openstack client call Cold migration API.
>> "--block migration" option will be ignored if user don't specify "--live".
>>
>> But, IMO, this is unkindly.
>> This cause unexpected operation for operator.
>
> +1 This has confused/annoyed me before.
>
>>
>> P.S.
>> "--shared-migration" option has same issue.
>
> For the shared migration case, there is also this bug:
>
>    https://bugs.launchpad.net/nova/+bug/1459782
>
> which, if fixed/implemented would negate the need for
> --shared-migration? And would fix also "nova resize" on shared
> storage.
In my understanding, that report says about libvirt driver's behavior.
In the other hand, my report says about the logic of openstack client.

Current "openstack server migrate" command has following logic:

* openstack server migrate
    +-User don't specify "--live"
    | + Call cold-migrate API.
    |   Ignore "--block-migration" and "--shard-migration" option if user specify those.
    |
    +-User specify "--live"
    | + Call live-migration API.
    |
    +-User specify "--live --block-migration"
    | + Call block-live-migration API.
    |
    +-User specify "--live --shared-migration"
      + Call live-migration API.[1]

[1]
"--shared-migration" means live-migration(not block-live-migrate) in "server migrate" command.
In other words, "server migrate --live" and "server migrate --live --shared-migration"
are same operation.
I'm wondering why "--shared-migration" is existed...


> Cheers,
> Marcus.
>

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