How to create a vCAC 6 Linux Guest Agent Template

In this example I am configuring a Linux Template that will be used to create a vCAC 6 Blueprint. This is using a vSphere 5.x VM. Start with a fresh build of Linux with VMware tools installed.

NOTE: You if you are using vCAC (vRA) with a Windows 2012 IaaS server you will need to disable TLS 1.2 on that server for the guest agent to work.

Start by downloading the Linux Guest agent packages from the vCAC appliance home page. Download the Linux Guest agents from https://FQND-of-vCACappliance:5480/installer/


Unzip the Linux guest agents zip file to a folder on your hard drive and use WINSCP to transfer the correct agent to your Linux Server. You can download WINSCP for free at the link below


Now use PUTTY to open an SSH session, login as ROOT and change to the /tmp directory You can download Putty For free at the link below


Run the following command to install the vCAC Guest agent rpm -i gugent-6.0.0-2026.x86_64.rpm


rpm -i gugent-6.0.0-2026.x86_64.rpm

Now we need to make sure the SSL certificate is available on the Linux Template you are creating, open firefox to your FQDN of your vCAC IaaS box and login as your cloud admin for example https://vcac-w8-01a.corp.local


Click the Lock and then click more information


Now click View Certificate


On the next screen click the Details tab, then click export


Now click Export and save the file to your desktop, make sure to save as cert and type X.509 Certificate (PEM)


Now use WinSCP to copy the cert.crt file to your Linux template to the /usr/share/gugent directory


Now go back to your putty session of your Linux template and type cd /usr/share/gugent and press enter


Now run the command openssl x509 -in mycert.crt -out mycert.pem -outform PEM

openssl x509 -in cert.crt -out cert.pem -outform PEM

Now we are ready to register the Guest agent with your vCAC Windows Server type ./ FQDNofyourvcacIaaSWindowsServer ssl and press enter for example ./ vcac-w8-01a.corp.local:443 ssl

./ vcac-w8-01a.corp.local:443 ssl

type ./ to test the installation

Please NOTE: Verify that the vCAC endpoint is displayed as https://vcac-WindowsboxFQD/VMPS2 if not the agent will not function and provisioning will be stuck at CustomizeOS. See my example below.



The Guest agent requires SELinux to be disabled change directory to /etc/sysconfig and edit the selinux file


Change the following line to disabled and save the file by pressing the ESC key then hold shift and type ZZ.

NOTE: If you are using RHEL/CENTOS 6.5 or higher you will also need to install the demicode package.
yum -y install dmidecode
Press enter

Shutdown your Linux Server by typing shutdown now and press enter

Important! If your vCAC/vRA IaaS box is running Windows Server 2012 you will need to apply the following patch to it or the Guest agent will not be able to communicate with vCAC/vRA. Click here!

You can now create a template or make a vCenter Snapshot to create a linked clone in vCAC Learn how to Create a Linked Clone Here

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21 Replies to “How to create a vCAC 6 Linux Guest Agent Template”

  1. Pingback: Self Service application Portal with vCAC 6 and Chef |

  2. Is there a way to download/extract the vCAC guest agents, both Windows and Linux, without deploying vCAC?

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  4. Pingback: Docker as a Service in vCAC Part 1 |

  5. Just for those who waste time on searching info about this error:

    Application: [Error] Failed to query machine for UUID
    Application: [Debug] Uninitializing subsystem: Logging Subsystem

    On CentOS 6.5 we’ve faced this issue due to dmidecode package which was not installed. After installing it, everything went fine.

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  6. Pingback: How to call vCAC (vRA) from command line to request VM’s and run scripts in the guest |

  7. Is there any way to create DNS host and pointer records for Linux VMs deployed via VCAC?

    For Windows server VMs this happens automatically when they join domain but for Linux VMs it is still a manual process.

    Help would be appreciated!!

  8. Pingback: MaaS – Minecraft as a Service | Virtualise Me

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