oms_install_all_vms_in_specific_RG.sh

#!/usr/bin/env bash
# Title:  	Oms Install on all VMs in specific RG
# Author: 	Marin Nedea 
# Usage:  	Change the variables to your own. 
#		Make sure the script has executable permissions:
#		chmod +x oms_install_all_vms_in_specific_RG.sh
#		execute the script by typing:  ./oms_install_all_vms_in_specific_RG.sh
# Requires 	AzCli 2.0 to run: https://docs.microsoft.com/en-us/cli/azure/install-azure-cli?view=azure-cli-latest

# Declare the variables
omsid=<Workspace ID here>
omskey=<OMS key here>
sID=<Subscription ID here>
rgName=<Resource Group Name here>

# Set subscriptionID:
az account set --subscription $sID 

# List all VMs for $rgName
declare -a vmarray="$(az vm list -g $rgName --query '[].name' -o tsv)"

#check if array is empty
if [ -z "$vmarray" ]; then
	echo "No VM in $rgName"
	exit	
else
	for i in ${vmarray[@]}; do
		vmName=$i;
	
		# Make sure the VM running
		vm_state="$(az vm show -g $rgName -n $vmName -d --query powerState -o tsv)"

		if [[ "$vm_state" != "VM running" ]] ; then
			echo "Starting VM: $vmName "
			az vm start -g $rgName -n $vmName
		else
			echo "VM $vmName is already in running state."	
		fi					
		
		# Get the Operating System
		vm_os="$(az vm get-instance-view -g $rgName -n $vmName | grep -i osType| awk -F '"' '{printf $4 "\n"}')"
		
		if [[ "$vm_os" == "Linux" ]] ; then			
			extName=OmsAgentForLinux		
			# Currently, the available versions are: 1.0, 1.2, 1.3, 1.4
			extVersion=1.4
		else			
			extName=MicrosoftMonitoringAgent		
			# Currently, the available versions are: 1.0
			extVersion=1.0
		fi
		
		# Create an array of installed extensions in the VM
		declare -a installedExt="$(az vm extension list  -g $rgName --vm-name $vmName --query "[].name" -o tsv)"
		
		if [[ ! " ${installedExt[@]} " =~ " $extName " ]]; then
		
		# Install the OMS extension on VM
		az vm extension set \
			--resource-group $rgName \
			--vm-name $vmName \
			--name $extName \
			--publisher Microsoft.EnterpriseCloud.Monitoring \
			--version $extVersion --protected-settings '{"workspaceKey": "'"$omskey"'"}' \
			--settings '{"workspaceId": "'"$omsid"'"}'  
		echo "$extName installed on VM $vmName in RG $rgName."
		else
			echo "The extension $extName is already installed on the VM $vmName"
		fi
	done
fi