enable-ctk.sh

#!/bin/bash

VM_PATH="${1:?ERROR: VM path required. Usage: $0 <vm-path>}"

echo "Fetching VMs from path: $VM_PATH"

VMS=$(govc ls "$VM_PATH" | grep -v '/$')

for VM in $VMS; do
    echo "==> Processing: $VM"

    govc vm.change -vm "$VM" -e ctkEnabled=TRUE
    if [ $? -eq 0 ]; then
        echo "    CTK enabled on VM"
    else
        echo "    WARNING: Failed to enable CTK on VM"
        continue
    fi

    # Get disk controller key and unit number as "controllerKey unitNumber"
    DISKS=$(govc device.info -vm "$VM" -json | jq -r '.devices[] | select(.type=="VirtualDisk") | "\(.controllerKey) \(.unitNumber)"')

    if [ -z "$DISKS" ]; then
        echo "    No disks found"
    else
        # Build a map of controllerKey -> scsiX index
        SCSI_MAP=$(govc device.info -vm "$VM" -json | jq -r '.devices[] | select(.type | test("VirtualLsiLogic|VirtualSCSI|ParaVirtualSCSIController|VirtualBusLogic")) | "\(.key) \(.busNumber)"')

        while IFS= read -r DISK; do
            CTRL_KEY=$(echo "$DISK" | awk '{print $1}')
            UNIT=$(echo "$DISK" | awk '{print $2}')

            BUS=$(echo "$SCSI_MAP" | awk -v key="$CTRL_KEY" '$1==key {print $2}')

            if [ -z "$BUS" ]; then
                echo "    WARNING: Could not resolve controller for disk (controllerKey=$CTRL_KEY)"
                continue
            fi

            SCSI="scsi${BUS}:${UNIT}"
            govc vm.change -vm "$VM" -e "${SCSI}.ctkEnabled=TRUE"
            if [ $? -eq 0 ]; then
                echo "    CTK enabled on disk: $SCSI"
            else
                echo "    WARNING: Failed to enable CTK on disk: $SCSI"
            fi
        done <<< "$DISKS"
    fi

    echo "    Done. Remember to power-cycle and take a snapshot to initialize CTK."
done