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Configuration of VMs via Cloud-Init

Cloud-init is a popular way to initializes Virtual Machines (VMs). This sample leverages Cloud-Init to initialize various types of VMs used such as the jumpbox, the proxies, the simulated IoT Edge devices and the simulated IIOT assets.

The cloud-init configuration of each of these VM type is stored in this folder. These configurations are however passed to the VMs via an Azure Resource Manager (ARM) template via the CustomData field. To update a cloud-init script in an ARM template, follow these steps:

  • Format the cloud-init script to be used in the ARM template:

    • From a terminal, go to the cloud-inits directory:
    cd  ./scripts/cloud-inits/
    • Run the following python code targeting the cloud-init of the type of VM that you want to update:
    python python ./cloudInitToCustomData/cloudInitToCustomData.py ./jumpbox/cloud-init.txt
    • Copy the output of the python script

  • Update the ARM template with the new cloud-init script:

    • Open the ARM template of the targeted VM in the ARM-templates folder
    • Find the the CustomData field and replace it with the key and value provided by the Python script above