Ability to create/update a VM with an additional data drive(s)

Badgerati / Fogg

PowerShell tool to aide and simplify the creation, deployment and provisioning of infrastructure in Azure

MIT License

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Ability to create/update a VM with an additional data drive(s) #63

Closed Badgerati closed 7 years ago

Badgerati commented 7 years ago

This issue is to implement a new feature for VMs, which is to allow the template to define multiple additional data drives that can be attached to a VM.

Note: this will only create or update a VM to have these drives. It will not delete them

example:

"template": [
    {
        "type": "vm",
        "drives": [
            {
                "type": "data",
                "name": "Logs",
                "letter": "F",
                "size": 512
            }
        ]
    }
]

The "size" is in GB, and the "letter" can only be between F and Y. If the drive letter already exists on the VM, deployment will fail.

The "name" will be the name of the drive on the VM. (ie: Logs (F:))

Badgerati commented 7 years ago

Things left to do:

Validation of the "drives" section
Updating an existing VM with additional drives (turn-off, add-drives, turn-on -> provision)

Badgerati commented 7 years ago

It's possible to update an existing drive's letter, and technically name but when done by name a new disk is created in the storage account --> need to find a way of stopping this.

Badgerati commented 7 years ago

The final design for the template of drives looks as following:

"template": [
    {
        "type": "vm",
        "drives": [
            {
                "lun": 1,
                "name": "Logs",
                "letter": "K",
                "size": 256,
                "caching": "ReadOnly"
            }
        ]
    }
]

The LUN value must be greater than 0 and be unique, and once set must never be changed.
The Name is the unique name of the drive on the VM. This can be updated via the template
The Letter is the unique drive letter on the VM. This can be updated via the template
The Size of the disk is given in GB. This can be updated via the template, but can only be increased, not decreased
The Caching of the disk is optional. If not supplied is defaulted to "ReadOnly". Possible values are ReadOnly/ReadWrite and None. This can be updated via the template

Once a disk/drive has been created, Fogg will not remove them later on if they are removed from the template (to protect against accidents of removing whole drives of important data)