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Posted to dev@vcl.apache.org by 杨杰 <xt...@gmail.com> on 2009/05/15 06:44:45 UTC
Functions in the VCL
Hi,
We are now trying to integrate VCL as a provision manager to a load
banlancing tool. The experiment may help us to manage the VMs according to
the server load automatically.
The task demands definite understand on the API of VCL, which will
considerably advance our experiment. How could i get it ? or is there any
website to view the API document ?
Thank you !
--
Yang Jie（杨杰）
Team of MRMSS, Xi'an Jiaotong University
Department of Computer Science and Technology, Xi’an Jiaotong University
TEL: +8613468883723;029-82665263 EXT.24
MSN: xtyangjie2004@yahoo.com.cn
E-mail: xtyangjie@gmail.com
Don Marquis <http://www.brainyquote.com/quotes/authors/d/don_marquis.html>
- "Procrastination is the art of keeping up with yesterday."
Re: Functions in the VCL
Posted by Josh Thompson <jo...@ncsu.edu>.
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Hash: SHA1
There are 2 APIs. One is an XML RPC API that is for interacting with a full
install of VCL. The second is the API for creating backend modules.
The documentation for the XML RPC API should be available at your own vcl
website under the Documentation link in the left navigation area. This API
does not expose all of the functionality that can be done through the web
interface, but it is growing and is easy to extend. If you don't see the
Documentation link, you need to add your userid (from the user table) to the
$docreaders array in .ht-inc/vcldocs.php.
There is a legacy reason for using this $docreaders array that sill exists
from when the code was developed at NCSU. I'll create a JIRA issue to change
that to either be available to all users or to be configurable so that it can
be available to all users without having to add them to the array.
The documentation for the backend module API is available at the apache
confluence space in the child pages of:
http://cwiki.apache.org/confluence/display/VCL/Backend
Josh
On Friday May 15, 2009, 杨杰 wrote:
> Hi,
> We are now trying to integrate VCL as a provision manager to a load
> banlancing tool. The experiment may help us to manage the VMs according to
> the server load automatically.
>
> The task demands definite understand on the API of VCL, which will
> considerably advance our experiment. How could i get it ? or is there any
> website to view the API document ?
>
> Thank you !
- --
- -------------------------------
Josh Thompson
Systems Programmer
Virtual Computing Lab (VCL)
North Carolina State University
Josh_Thompson@ncsu.edu
919-515-5323
my GPG/PGP key can be found at pgp.mit.edu
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=ogxx
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Re: Functions in the VCL
Posted by 杨杰 <xt...@gmail.com>.
Thank you so much for both of the suggestions ! Aiming to build a platform
which has load balancing functionality of vm operation, we've tried for a
while. We are now trying to use a load balancing tool to call the functions
that vcl has implemented based on the vmware perl toolkit. In this respect,
the vcl project has given us considerable help.
For the fact Brian has shown, we'll try to research on and find a practical
method to customize part of the code of vcl to meet our need. Thanks again
for your help !
2009/5/16 Brian Bouterse <bm...@ncsu.edu>
> When Andrew and I built the esx.pm provisioning module that was developed
> at the Open Systems Collaboration and Research Lab (OSCaR), we wanted to
> build load balancing functionality based on feedback from the usage of the
> servers in real time. From our evaluation, there is not reasonable way to
> do this with the VCL 2.X architecture. The heart of the problem is that the
> 2.X architecture achieves scheduling through a combination of frontend code,
> backend code, and a database in the middle. The placement decision (which
> hypervisor an image will run on) is decided in the frontend, so no amount of
> API's will enable this decision to be more intelligent without rewriting
> portions of both the frontend and backend to being ESX aware and ESX
> specific. Over time, integrating a large number of resource types makes
> this integration path intractable.
>
> Having tried to implement this into VCL 2.X, this feature use case is what
> brought about the proposal of an alternative VCL architecture to accommodate
> these types of features and extensions in a more reasonable way/ (found
> here:
> http://cwiki.apache.org/confluence/display/VCL/Experimental+VCL+Architecture+Document).
> An implementation of this experimental architecture is nearing the proof of
> concept stage, and I will commit the POC code of the proposed experimental
> architecture to a branch of the SVN next week. I would encourage your team
> to use that as a starting point for the integration you propose. It could
> be done easily by rewriting the PlacementController component inside the ESX
> Resource Manager, which will contain a simple round robin scheduler as it
> goes to pair images with hypervisors to run on. More documentation will
> also be provided along with the initial code commit to help get you started.
>
> Best,
> Brian
>
>
> Brian Bouterse
> Secure Open Systems Initiative
> 919.698.8796
>
>
>
>
>
> On May 15, 2009, at 12:44 AM, 杨杰 wrote:
>
> Hi,
>> We are now trying to integrate VCL as a provision manager to a load
>> banlancing tool. The experiment may help us to manage the VMs according to
>> the server load automatically.
>>
>> The task demands definite understand on the API of VCL, which will
>> considerably advance our experiment. How could i get it ? or is there any
>> website to view the API document ?
>>
>> Thank you !
>>
>> --
>> Yang Jie（杨杰）
>>
>> Team of MRMSS, Xi'an Jiaotong University
>>
>> Department of Computer Science and Technology, Xi’an Jiaotong University
>>
>> TEL: +8613468883723;029-82665263 EXT.24
>>
>> MSN: xtyangjie2004@yahoo.com.cn
>>
>> E-mail: xtyangjie@gmail.com
>> Don Marquis <http://www.brainyquote.com/quotes/authors/d/don_marquis.html
>> >
>> - "Procrastination is the art of keeping up with yesterday."
>>
>
>
--
Yang Jie（杨杰）
Team of MRMSS, Xi'an Jiaotong University
Department of Computer Science and Technology, Xi’an Jiaotong University
TEL: +8613468883723;029-82665263 EXT.24
MSN: xtyangjie2004@yahoo.com.cn
E-mail: xtyangjie@gmail.com
Vince Lombardi<http://www.brainyquote.com/quotes/authors/v/vince_lombardi.html>
- "We didn't lose the game; we just ran out of time."
Re: Functions in the VCL
Posted by Brian Bouterse <bm...@ncsu.edu>.
When Andrew and I built the esx.pm provisioning module that was
developed at the Open Systems Collaboration and Research Lab (OSCaR),
we wanted to build load balancing functionality based on feedback from
the usage of the servers in real time. From our evaluation, there is
not reasonable way to do this with the VCL 2.X architecture. The
heart of the problem is that the 2.X architecture achieves scheduling
through a combination of frontend code, backend code, and a database
in the middle. The placement decision (which hypervisor an image will
run on) is decided in the frontend, so no amount of API's will enable
this decision to be more intelligent without rewriting portions of
both the frontend and backend to being ESX aware and ESX specific.
Over time, integrating a large number of resource types makes this
integration path intractable.
Having tried to implement this into VCL 2.X, this feature use case is
what brought about the proposal of an alternative VCL architecture to
accommodate these types of features and extensions in a more
reasonable way/ (found here: http://cwiki.apache.org/confluence/display/VCL/Experimental+VCL+Architecture+Document)
. An implementation of this experimental architecture is nearing the
proof of concept stage, and I will commit the POC code of the proposed
experimental architecture to a branch of the SVN next week. I would
encourage your team to use that as a starting point for the
integration you propose. It could be done easily by rewriting the
PlacementController component inside the ESX Resource Manager, which
will contain a simple round robin scheduler as it goes to pair images
with hypervisors to run on. More documentation will also be provided
along with the initial code commit to help get you started.
Best,
Brian
Brian Bouterse
Secure Open Systems Initiative
919.698.8796
On May 15, 2009, at 12:44 AM, 杨杰 wrote:
> Hi,
> We are now trying to integrate VCL as a provision manager to a load
> banlancing tool. The experiment may help us to manage the VMs
> according to
> the server load automatically.
>
> The task demands definite understand on the API of VCL, which will
> considerably advance our experiment. How could i get it ? or is
> there any
> website to view the API document ?
>
> Thank you !
>
> --
> Yang Jie（杨杰）
>
> Team of MRMSS, Xi'an Jiaotong University
>
> Department of Computer Science and Technology, Xi’an Jiaotong
> University
>
> TEL: +8613468883723;029-82665263 EXT.24
>
> MSN: xtyangjie2004@yahoo.com.cn
>
> E-mail: xtyangjie@gmail.com
> Don Marquis <http://www.brainyquote.com/quotes/authors/d/don_marquis.html
> >
> - "Procrastination is the art of keeping up with yesterday."