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From: Chiradeep Vittal <Chiradeep.Vittal@citrix.com>
To: CloudStack DeveloperList <cloudstack-dev@incubator.apache.org>
Date: Wed, 16 Jan 2013 13:02:04 -0800
Subject: Re: [DISCUSS] Global Server Load Balancing (GSLB) FS & Design
 Document
Thread-Topic: [DISCUSS] Global Server Load Balancing (GSLB) FS & Design
 Document
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Message-ID: <CD1C5532.40E7C%chiradeep.vittal@citrix.com>
In-Reply-To: <CD1B3D74.2C4F2%murali.reddy@citrix.com>
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Thanks. Can you add the actual API parameters? Otherwise, LGTM.

On 1/15/13 3:55 AM, "Murali Reddy" <Murali.Reddy@citrix.com> wrote:

>I have update the FS [1] as per the review comments. Changes done are
>included in document history section.
>
>I would like to seek comments on one change added in FS. In CloudStak, at
>present there are no operations that require orchestration across zones.
>GSLB and EIP across zones [2] are two immediate features that require
>cross-zone orchestration. I would like to introduce notion of 'region'
>level services and corresponding service provider in to CloudStack. Please
>share your thoughts.
>
>[1]=20
>https://cwiki.apache.org/confluence/display/CLOUDSTACK/GSLB+(Global+Server
>+
>Load+Balancing)+Functional+specification+and+Design+Document
>
>[2] https://issues.apache.org/jira/browse/CLOUDSTACK-652
>
>
>On 11/01/13 2:32 PM, "Murali Reddy" <Murali.Reddy@citrix.com> wrote:
>
>>On 11/01/13 2:55 AM, "Chiradeep Vittal" <Chiradeep.Vittal@citrix.com>
>>wrote:
>>
>>>Thanks for the detailed and enlightening write-up*.
>>>
>>>I feel that the GSLB service is not a NetworkElement.
>>>NetworkElements are those that participate in the L2/L3 orchestration of
>>>VMs.
>>>GSLB providers do not do this.
>>
>>Thanks for the review Chiradeep. Sure, GSLB service, is indeed cross-zone
>>service, does not fit in to NetWorkElement model. I will by-pass using
>>NetWorkElement, and let GSLB orchestration send commands directly to
>>agent
>>representing the GSLB provider.
>>
>>>
>>>It does not even participate in the existing Loadbalancer workflow.
>>>
>>>In fact I would assert that this is a completely different higher-level
>>>orchestration workflow that should not need to touch network elements or
>>>the network manager.
>>>You could even write this feature by orchestrating it using the end-user
>>>APIs.
>>
>>Agreed. GSLB orchestration need not be part of network manager, I will
>>restrict it to service layer.
>>
>>I will update the spec and get back.
>>
>>>
>>>
>>>*A lot of folks strive to format the document according to the template
>>>but the template is just to make sure that vital information is not
>>>missed. What ends up happening is that there's a lot of information, but
>>>incoherently organized. Nice job.
>>>
>>>
>>>On 1/8/13 12:52 PM, "Murali Reddy" <Murali.Reddy@citrix.com> wrote:
>>>
>>>>In continuation to my proposal [1], I am brining GSLB support
>>>>separately for discussion. I have put up functional specification and
>>>>design documentation at [2]. Please provide feedback, comments.
>>>>
>>>>Quick abstract of the feature:
>>>>
>>>>Today CloudStack supports load balancing traffic across the VM
>>>>instances
>>>>with in a zone. In case of multi-zone clouds, users can launch service
>>>>across one or more zones for high availability and disaster recovery.
>>>>GSLB
>>>>is set of technologies that are used to load balance traffic across
>>>>multiple location and also provides disaster recovery. With this
>>>>feature
>>>>CloudStack would be able to orchestrate setting up load balancing
>>>>across
>>>>multiple zones and also provide disaster recovery solution in case of
>>>>multiple zone clouds.
>>>>
>>>>
>>>>[1] http://markmail.org/message/lx6tyikvmvd6wix4
>>>>
>>>>[2]https://cwiki.apache.org/confluence/display/CLOUDSTACK/GSLB+%28Globa
>>>>l
>>>>+
>>>>S
>>>>e
>>>>rver+Load+Balancing%29+Functional+specification+and+Design+Document
>>>>
>>>
>>>
>>
>>
>>
>
>