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From Imesh Gunaratne <im...@apache.org>
Subject Re: AWS Load Balancing Support for Stratos - Screencast
Date Wed, 22 Jul 2015 15:36:21 GMT
Yes today in a demo Swapnil showed this issue to us. We need to investigate
the load balancer extension and see the reason for this problem.

Thanks

On Wed, Jul 22, 2015 at 9:21 AM, Swapnil Patil <swapnil.rp15@gmail.com>
wrote:

> Hi Imesh, Lakmal,
>
> I observed the extension log to find out that, extension's configure
> method is indeed called after member is activated but before it is added to
> cluster. I assume that is why extension cannot see the newly activated
> member as a part of cluster.
>
> I hope this is what we expect.
>
> Thanks and Regards,
> Swapnil
>
> On Tue, Jul 21, 2015 at 4:27 AM, Imesh Gunaratne <imesh@apache.org> wrote:
>
>> On Mon, Jul 20, 2015 at 9:20 PM, Swapnil Patil <swapnil.rp15@gmail.com>
>>  wrote:
>>>
>>>
>>> Though there was some time lag for the extension to get to know the
>>> newly spawned instance. When a new instance is spawned the extension's
>>> configure method got called but the topology did not have this new member.
>>> This new member was visible in the next topology update. I believe this is
>>> a known issue. I guess Asanka also faced similar issue for GCE extension.
>>> Am I right, Asanka?
>>>
>>>
>> Members are only added to the load balancer topology when they become
>> active. Members in other states are not visible to the load balancer.
>>
>> On Mon, Jul 20, 2015 at 9:20 PM, Swapnil Patil <swapnil.rp15@gmail.com>
>> wrote:
>>
>>> Hi Lakmal,
>>>
>>> I tested the extension for scale up and scale down. And it did work as
>>> expected. It attached the the newly spawned instances to the LB while
>>> scaling up and detached the terminated instances from LB.
>>>
>>> Though there was some time lag for the extension to get to know the
>>> newly spawned instance. When a new instance is spawned the extension's
>>> configure method got called but the topology did not have this new member.
>>> This new member was visible in the next topology update. I believe this is
>>> a known issue. I guess Asanka also faced similar issue for GCE extension.
>>> Am I right, Asanka?
>>>
>>> Thanks and Regards,
>>> Swapnil
>>>
>>> On Mon, Jul 20, 2015 at 5:37 AM, Swapnil Patil <swapnil.rp15@gmail.com>
>>> wrote:
>>>
>>>> Thanks Lakmal!
>>>>
>>>> I have the logic in place to attach newly created instances to LB in
>>>> case of scale up and same for scale down. But I have not tested it yet.
>>>> That testing will be my next step. I am pretty sure that it will work but
>>>> it is just that I need to verify it.
>>>>
>>>> I will get to know if any service interruption occurs in these cases
>>>> when I test it. I will update the thread with my observations.
>>>>
>>>> Thanks and Regards,
>>>> Swapnil
>>>>
>>>> On Mon, Jul 20, 2015 at 5:06 AM, Lakmal Warusawithana <lakmal@wso2.com>
>>>> wrote:
>>>>
>>>>> Great work Swapnil!
>>>>>
>>>>> Just for my clarification, I have few question. Say when cluster scale
>>>>> up , does AWS load balancer extension attached the newly created instance
>>>>> to LB? same like when scale down does it detached the deleted instance
from
>>>>> LB? Also when attaching and detaching does any service interruption occurs?
>>>>>
>>>>> thanks
>>>>>
>>>>> On Mon, Jul 20, 2015 at 10:11 AM, Swapnil Patil <
>>>>> swapnil.rp15@gmail.com> wrote:
>>>>>
>>>>>> Hi AIl,
>>>>>>
>>>>>> I have published screencast of AWS load balancer extension on
>>>>>> YouTube. Here is the link : https://youtu.be/ZNl8JVB7xeU
>>>>>>
>>>>>> I would appreciate any suggestions.
>>>>>>
>>>>>> Thanks and Regards,
>>>>>> Swapnil
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Lakmal Warusawithana
>>>>> Vice President, Apache Stratos
>>>>> Director - Cloud Architecture; WSO2 Inc.
>>>>> Mobile : +94714289692
>>>>> Blog : http://lakmalsview.blogspot.com/
>>>>>
>>>>>
>>>>
>>>
>>
>>
>> --
>> Imesh Gunaratne
>>
>> Senior Technical Lead, WSO2
>> Committer & PMC Member, Apache Stratos
>>
>
>


-- 
Imesh Gunaratne

Senior Technical Lead, WSO2
Committer & PMC Member, Apache Stratos

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