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From Lakmal Warusawithana <lak...@wso2.com>
Subject Re: External Volume Support for Cloud Controller
Date Mon, 10 Feb 2014 10:47:52 GMT
On Mon, Feb 10, 2014 at 4:13 PM, Nirmal Fernando <nirmal070125@gmail.com>wrote:

> Not really. We're letting the user to set the option, whether he needs a
> volume or not.
>
>
But we need to define this in cartridge definition, because cartridge
creator need to do relevant stuff to make it work inside cartridge.
Otherwise it make no sense. Only think user can select delete
option from subscription, IMO.

>
> On Mon, Feb 10, 2014 at 4:08 PM, Isuru Haththotuwa <isuruh@wso2.com>wrote:
>
>>
>>
>>
>> On Mon, Feb 10, 2014 at 4:03 PM, Lakmal Warusawithana <lakmal@wso2.com>wrote:
>>
>>>
>>>
>>>
>>> On Mon, Feb 10, 2014 at 4:00 PM, Nirmal Fernando <nirmal070125@gmail.com
>>> > wrote:
>>>
>>>> +1. Would it be better to make this configurable while subscribing
>>>> instead of via cartridge definition?
>>>>
>>>> Yeah much better.
>>>
>>
>> IMHO better to to have this in the cartridge definition. We are defining
>> whether to use persistence volume/not in the cartridge definition, so we
>> can do this there itself. Just my opinion.
>>
>>>
>>>
>>>
>>>>
>>>> On Mon, Feb 10, 2014 at 3:31 PM, Lakmal Warusawithana <lakmal@wso2.com>wrote:
>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Mon, Feb 10, 2014 at 3:27 PM, Nirmal Fernando <
>>>>> nirmal070125@gmail.com> wrote:
>>>>>
>>>>>> What's your opinion on;
>>>>>>
>>>>>>
>>>>>>
>>>>>> *I'd especially like to get your thoughts on deleting volumes upon
an
>>>>>> unsubscription. Should we do that? *
>>>>>>
>>>>>>
>>>>> Shall we make this configurable in cartridge definition. Some cases
>>>>> may want not to delete volume after unsubscribe. Default may be delete.
>>>>> WDYT?
>>>>>
>>>>>
>>>>>
>>>>>>
>>>>>> On Mon, Feb 10, 2014 at 2:07 PM, Lakmal Warusawithana <
>>>>>> lakmal@wso2.com> wrote:
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Feb 10, 2014 at 2:04 PM, Lakmal Warusawithana <
>>>>>>> lakmal@wso2.com> wrote:
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Feb 10, 2014 at 11:27 AM, Nirmal Fernando <
>>>>>>>> nirmal070125@gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hi Reka,
>>>>>>>>>
>>>>>>>>> In EC2 APIs it says, once the instance got terminated,
the volume
>>>>>>>>> would get detached automatically. I'm yet to look at
Openstack APIs.
>>>>>>>>>
>>>>>>>>> But, if the instance got crashed, volume's data can be
corrupted,
>>>>>>>>> and that issue is not in our control AFAIU.
>>>>>>>>>
>>>>>>>>
>>>>>>>> Not exactly, IMO, this feature is required to recover data
and
>>>>>>>> reattached new instance when instance terminated or crashed.
Because normal
>>>>>>>> VM instances are stateless.
>>>>>>>>
>>>>>>>
>>>>>>> So IMO, we need to have some mechanism to re-attached same volume
is
>>>>>>> above happened. We can store volume detail in topology and re-attached
when
>>>>>>> creating new instance in this case IMO.
>>>>>>>
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Mon, Feb 10, 2014 at 11:21 AM, Reka Thirunavukkarasu
<
>>>>>>>>> reka@wso2.com> wrote:
>>>>>>>>>
>>>>>>>>>> Hi Nirmal,
>>>>>>>>>>
>>>>>>>>>> +1. Nice flow...Thanks for the detailed elaboration
on this.
>>>>>>>>>>
>>>>>>>>>> I have a small question on this. If an instance got
crashed, what
>>>>>>>>>> would happen to the attached volume? Will the volume
get detached
>>>>>>>>>> automatically, so that a upcoming instance will be
able to use the same
>>>>>>>>>> volume?
>>>>>>>>>>
>>>>>>>>>> Thanks,
>>>>>>>>>> Reka
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Mon, Feb 10, 2014 at 10:52 AM, Nirmal Fernando
<
>>>>>>>>>> nirmal070125@gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> Hi Guys,
>>>>>>>>>>>
>>>>>>>>>>> I'm working on $subject and current flow is like
this:
>>>>>>>>>>>
>>>>>>>>>>> [image: Inline image 1]
>>>>>>>>>>> I'd especially like to get your thoughts on deleting
volumes
>>>>>>>>>>> upon an unsubscription. Should we do that?
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> Best Regards,
>>>>>>>>>>> Nirmal
>>>>>>>>>>>
>>>>>>>>>>> Nirmal Fernando.
>>>>>>>>>>> PPMC Member & Committer of Apache Stratos,
>>>>>>>>>>> Senior Software Engineer, WSO2 Inc.
>>>>>>>>>>>
>>>>>>>>>>> Blog: http://nirmalfdo.blogspot.com/
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Reka Thirunavukkarasu
>>>>>>>>>> Software Engineer,
>>>>>>>>>> WSO2, Inc.:http://wso2.com,
>>>>>>>>>> Mobile: +94776442007
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Best Regards,
>>>>>>>>> Nirmal
>>>>>>>>>
>>>>>>>>> Nirmal Fernando.
>>>>>>>>> PPMC Member & Committer of Apache Stratos,
>>>>>>>>> Senior Software Engineer, WSO2 Inc.
>>>>>>>>>
>>>>>>>>> Blog: http://nirmalfdo.blogspot.com/
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Lakmal Warusawithana
>>>>>>>> Software Architect; WSO2 Inc.
>>>>>>>> Mobile : +94714289692
>>>>>>>> Blog : http://lakmalsview.blogspot.com/
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Lakmal Warusawithana
>>>>>>> Software Architect; WSO2 Inc.
>>>>>>> Mobile : +94714289692
>>>>>>> Blog : http://lakmalsview.blogspot.com/
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Best Regards,
>>>>>> Nirmal
>>>>>>
>>>>>> Nirmal Fernando.
>>>>>> PPMC Member & Committer of Apache Stratos,
>>>>>> Senior Software Engineer, WSO2 Inc.
>>>>>>
>>>>>> Blog: http://nirmalfdo.blogspot.com/
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Lakmal Warusawithana
>>>>> Software Architect; WSO2 Inc.
>>>>> Mobile : +94714289692
>>>>> Blog : http://lakmalsview.blogspot.com/
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Best Regards,
>>>> Nirmal
>>>>
>>>> Nirmal Fernando.
>>>> PPMC Member & Committer of Apache Stratos,
>>>> Senior Software Engineer, WSO2 Inc.
>>>>
>>>> Blog: http://nirmalfdo.blogspot.com/
>>>>
>>>
>>>
>>>
>>> --
>>> Lakmal Warusawithana
>>> Software Architect; WSO2 Inc.
>>> Mobile : +94714289692
>>> Blog : http://lakmalsview.blogspot.com/
>>>
>>>
>>
>>
>> --
>> Thanks and Regards,
>>
>> Isuru H.
>> +94 716 358 048* <http://wso2.com/>*
>>
>>
>>
>
>
> --
> Best Regards,
> Nirmal
>
> Nirmal Fernando.
> PPMC Member & Committer of Apache Stratos,
> Senior Software Engineer, WSO2 Inc.
>
> Blog: http://nirmalfdo.blogspot.com/
>



-- 
Lakmal Warusawithana
Software Architect; WSO2 Inc.
Mobile : +94714289692
Blog : http://lakmalsview.blogspot.com/

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