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For this tutorial, we will pretend there's a need to change the disk layout of a virtual machine (recently provisioned) based in the following statements:

  • Disk 1 needs to be resized from 1TB to 300GB
  • Disk 2 needs to be resized from 250GB to 300GB
  • New Disk 3 of 300GB needs to be added.

Prerequisites

  1. Valid access token. 
  2. Access to Virtual Machine
  3. Virtual Machine name.

Step-by-step guide

  1. Get virtual machine UUID using the search feature in the /vm resource:

    Request
    http -a $TK GET "https://vss-api.eis.utoronto.ca:8001/v2/vm?name=vm-testing&summary"
    Response Body
    {
    "_links": {
        "api": "https://vss-api.eis.utoronto.ca:8001/v2/",
        "self": "https://vss-api.eis.utoronto.ca:8001/v2/vm"
    },
    "data": [
        {
            "_links": {
                "self": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>"
            },
            "name": "1606D-vm-testing",
            "uuid": "<vm_uuid>"
        }
    ],
    "meta": {
        "count": 1,
        "time": "10.13983s",
        "user": "josem"
    }
}

  2. Since vSphere does not support disk "shrinking" (unless it's cloned to a new target disk), we would need to remove Disk 1 and create a new Disk 1 of 300GB. This can be done as follows:

    # HTTP DELETE method to the right disk resource will remove the disk
http -a $TK DELETE "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/1"
 
# HTTP POST to disk 1 resource will create a new 300GB disk as 
# specified in the attribute value
http -a $TK POST "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/1" value=300

  3. Verifying Disk 1 settings:

    Request
    http -a $TK GET "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/1"
    Response Body
    {
    "_links": {
        "self": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/1",
        "vm": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>"
    },
    "data": [
        {
            "capacityGB": 300,
            "controller": {
                "type": "LSI Logic",
                "virtualDeviceNode": "SCSI controller 0:1"
            },
            "description": "314,572,800 KB",
            "fileName": "[CL-NSTOR47-NFS-vol31] 1606D-vm-testing/1606D-vm-testing_1.vmdk",
            "label": "Hard disk 1",
            "provisioning": "Thin",
            "shares": {
                "level": "normal",
                "shares": 1000
            }
        }
    ],
    "meta": {
        "count": 1,
        "time": "0.04656s",
        "user": "jm"
    }
}

  4. Adding Disk 3 is done making a POST request to /vm/<vm_uuid>/disk/3 resource:

    http -a $TK POST "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/3" value=300

  5. Verifying new disk layout:

    http -a $TK GET "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk"
    Response Body
    {
    "_links": {
        "self": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk",
        "vm": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>"
    },
    "data": [
        {
            "_links": {
                "self": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/1"
            },
            "capacityGB": 300,
            "label": "Hard disk 1"
        },
        {
            "_links": {
                "self": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/2"
            },
            "capacityGB": 300,
            "label": "Hard disk 2"
        },
        {
            "_links": {
                "self": "https://vss-api.eis.utoronto.ca:8001/v2/vm/<vm_uuid>/disk/3"
            },
            "capacityGB": 300,
            "label": "Hard disk 3"
        }
    ],
    "meta": {
        "count": 2,
        "time": "0.05709s",
        "user": "jm"
    }
}

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