KBEC-00028 - Automatically provision VMware Virtual Machines running on ESX servers, without using Lab Manager

Summary

ElectricCommander is tightly integrated with VMware Lab Manager, which allows ElectricCommander to easily provision and destroy virtual machines during the build process. The current integration with VMware requires you to use Lab Manager. If you are not using Lab Manager, this article describes a similar solution that works directly with ESX (VI3) servers, including the tools you need and the techniques to directly manipulate the ESX server. The solution for provisioning ESX servers is similar to Lab Manager, but slightly less functional.

What you can do

Using the VMware Infrastructure Perl Toolkit allows you manipulate the ESX server, storage, resource pools, and VMs. You can do just about anything you want to do to the ESX server. To download this toolkit, a link is provided at the end of this article.

What Lab Manager does better

Lab Manager provides functionality on top of ESX, so naturally, you will not have these functions if you communicate directly with the ESX server. In particular, Lab Manager allows:

  • Libraries of configurations
  • Very efficient storage of VMs
  • Network fencing around the VMS (allows mulitple copies of the same VM to run at the same time without network naming collisions [IP address, MAC, etc...] )

Solution

VMware provides a Perl toolkit to communicate with ESX servers. This Perl toolkit also contains some pre-built utilities to simplify interaction with the ESX server.... essentially providing a command-line interface.

  1. Download the toolkit for the intended platform. The VMware download site is http://www.vmware.com/support/developer/viperltoolkit/ (requires login)
  2. Install the toolkit on the ElectricCommander agent that will run the commands (this could be the ElectricCommander server).
  3. Create ElectricCommander steps that call the utilities.

Example

Here is an example script that runs in an ElectricCommander step. It logs on, queries the ESX server, starts a VM, and then shuts down the VM.

REM *** setup paths and environment variables
set APIHOME=c:\Program Files\VMware\VMware VI Perl Toolkit
set PERLB=%APIHOME%\Perl\bin\perl.exe
set APIHOST=vsupport2
set PATH=%APIHOME%\perl\apps;%PATH%;%APIHOME%\perl\bin;%APIHOME%\perl\site\bin

REM *** change to the VMWare Perl Toolkit directory
c:
cd "%APIHOME%\perl\apps"

REM *** HACK to fix vmware chcp call errors...avoids call to c:\windows\system32\chcp
echo @echo off > chcp.cmd
echo echo Active code page: 437 >> chcp.cmd

REM *** logon to ESX server and save credentials in session file
del c:\session_file.txt
session\save_session.pl --username apidemo --password apidemo --server vsupport2 --savesessionfile c:\session_file.txt

REM *** show VM;s on this ESX server (just for fun)
general\vidiscovery.pl --server vsupport2 --sessionfile c:\session_file.txt --managedentity host --entityname vsupport2.electric-cloud.com

REM *** start a VM
vm\vmcontrol.pl --server vsupport2 --sessionfile c:\session_file.txt --operation poweron --vmname api

REM *** sleep 5 minutes
sleep 60

REM *** stop the VM
vm\vmcontrol.pl --server vsupport2 --sessionfile c:\session_file.txt --operation poweroff --vmname api




Notes

We found the VMWare utilities produced a strange error when running in ElectricCommander on Windows. It calls the Windows utility "chcp" to find the code page, but apparently returns empty results. Running the utility outside ElectricCommander works fine. For now, suppress the error by making a fake copy of "chcp" that gives back a value. This may have been a configuration problem on our test machine, but we included the workaround in case you have the same problem.

See Also

http://www.vmware.com/support/developer/viperltoolkit/doc/perl_toolkit_guide_idx.html

http://www.vmware.com/support/developer/viperltoolkit/doc/perl_toolkit_utilities_idx.html

Applies to

Product versions: Any
OS versions: Windows/Linux
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