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Excerpt

name	Add VM variables

Before you deploy a VM, you can set guest variables to pass user data to your VM. This functionality uses cloud-init and requires appropriate templates. In private cloud, the templates must have the guest setup flag set to cloud init. The administrator can add default variables for the VM template.

Tip
This functionality is available through the API. The platform stores variables in the VirtualMachine "`variables`" attribute, which is a dictionary of keys and values. See Update “Update a virtual machine machine” in VirtualMachinesResource

Info
You can modify VM variables before you deploy the VM

Note
Check your cloud providers' documentation for their recommendations about confidential information in variables

To add VM variables:

Go to Virtual datacenters → and edit a VM that is not deployed
Go to Variables
Enter a Key and Value
1. The length of these can be up to 255 characters each
Click Add
Image RemovedImage Added
Add more variables as required
To delete a variable click the trash can symbol beside the Key. To edit the Value of a variable, click the pencil edit button beside the Value
To apply changes to variables, and other changes to the VM, click Save

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Read guest variables

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The location of the variable will depend on the method of guest setup that you are using for your VM.
Here are some general guidelines.
Cloud
Method
Variable location
Private
Cloud-init
On the cloud-init ISO, which has the label `config-2`.
The variables file is `openstack/latest/vm-variables.rc`
Private
Hypervisor tools
On ESXi, run this command on the guest to get the value of a variable:
`vmtoolsd --cmd "info-get guestinfo.abiquo.<variable-name>"`
Private
Hypervisor tools
For vCloud Director, hypervisor tools does not support variables
Public
Cloud-init
The variables are stored in the `/opt/abiquo-env.rc` file
Amazon
Cloudbase-init
ec2launchv2
ec2lanch
ec2config
On Windows, the variables are stored in the
`C:\ProgramData\Abiquo\abiquo-env.rc` file
Azure
Cloud-init
On Windows, according to the Azure documentation on custom data
Custom data is placed in
%SYSTEMDRIVE%\AzureData\CustomData.bin
as a binary file, but it is not processed. If you wish to process
this file, you will need to build a custom image, and write code to process the CustomData.bin..
On Linux, use cloud-init to read the variables from custom data.

Versions Compared

Old Version 36

New Version Current

Key

Read guest variables

Cloud	Method	Variable location
Private	Cloud-init	On the cloud-init ISO, which has the label `config-2`. The variables file is `openstack/latest/vm-variables.rc`
Private	Hypervisor tools	On ESXi, run this command on the guest to get the value of a variable: `vmtoolsd --cmd "info-get guestinfo.abiquo.<variable-name>"`
Private	Hypervisor tools	For vCloud Director, hypervisor tools does not support variables
Public	Cloud-init	The variables are stored in the `/opt/abiquo-env.rc` file
Amazon	Cloudbase-init ec2launchv2 ec2lanch ec2config	On Windows, the variables are stored in the `C:\ProgramData\Abiquo\abiquo-env.rc` file
Azure	Cloud-init	On Windows, according to the Azure documentation on custom data Custom data is placed in %SYSTEMDRIVE%\AzureData\CustomData.bin as a binary file, but it is not processed. If you wish to process this file, you will need to build a custom image, and write code to process the CustomData.bin.. On Linux, use cloud-init to read the variables from custom data.