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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 |
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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 |
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You can modify VM variables before you deploy the VM |
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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 The length of these can be up to 255 characters each
Click Add  Image Removed Image AddedAdd 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 |
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Private | Cloud-init |
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Private | Hypervisor tools | On ESXi, run |
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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.
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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, |
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use cloud-init to read the variables from custom data. |