fixuuidfstab.sh

#!/usr/bin/env bash
#
# You have to be logged in to AzCli to run this.

# az login

# The script will iterate through all subscriptions, identify which VMs are 
# running Linux and have disks attached; if the VMs are deallocated, the script
# will check if the VM is generalized (prepared to become an image). If the VM  
# is not generalized, the script will start the VM, apply the fix than stop the
# VM back.
# For the VMs that were already powered ON, it will only apply the fix.


# To run this, just:
# chmod +x fixuuidfstab.sh && ./fixuuidfstab.sh

# Function to trigger the fix
function fix_uuids(){
        az vm extension set \
        --resource-group $vmRGName \
        --vm-name $vmName \
        --name customScript \
        --publisher Microsoft.Azure.Extensions \
        --protected-settings '{"fileUris": ["https://raw.githubusercontent.com/marinnedea/scripts/master/uuidfstab.bash"],"commandToExecute": "chmod +x uuidfstab.bash && ./uuidfstab.bash /etc/fstab"}'

        echo "Updated fstab entries in VM: $vmName"
}

# List all your subscriptions
declare -a sidarray="$(az account list --query [].id -o tsv)"
if [ -z "$sidarray" ]; then
        echo "No subscriptions IDs available. Stopping here."
        exit 0
else
	#for each subscription
	for i in ${sidarray[@]};  do
		sID=$i;
		# Set subscriptionID:
		az account set -s $sID
		echo "Subscription: $sID set."

		# List all VMs in subscription that are running Linux and have data disks attached
		declare -a vmsdetails="$(az vm list --query "[?not_null(storageProfile.dataDisks[])]|[?storageProfile.osDisk.osType=='Linux'].{Name:name, Power:powerState, RG:resourceGroup}" -d -o tsv)"
		
		if [ ! -z "$vmsdetails" ]; then
		
			printf '%s\n' "${vmsdetails[*]}" | while read line; do

				vmName="$(echo $line | awk '{print $1}')"                      
				vmpowerState="$(echo $line | awk '{print $3}')"
				vmRGName="$(echo $line | awk '{print $4}')"

				# echo "Found VM $vmName in Resource Group $vmRGName."                       
				# echo "The Vm Power State is: $vmpowerState."                     
				
				echo "Finding out if VM $vmName is generalized."
				generalizedStat="$(az vm get-instance-view  -g $vmRGName -n $vmName --query 'instanceView.statuses[0].displayStatus' -o tsv)"

				if [[ "$generalizedStat" != "VM generalized" ]] ; then
					echo "VM $vmName not generalized"
					if [[ "$vmpowerState" != "running" ]] ; then

				
						echo "VM $vmName powered-off. Starting it up."
						az vm start -g $vmRGName -n $vmName
					
					fi				
					
					echo "VM $vmName power state is: running. Applying fix."
					#Calling the function to run the fix UUIDs script:
					fix_uuids

					if [[ "$vmpowerState" != "running" ]] ; then

						echo "VM $vmName reverted back to deallocated status."
						az vm stop -g $vmRGName -n $vmName

					fi

				else

					echo "$vmName is generalized. No operations possible on it. Skipping!"

				fi                       
			done
		fi
	done
fi
exit 0