A Vagrantfile to create a small HTCondor cluster

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

#Total number of nodes
NODE_COUNT = 5
	
Vagrant.configure("2") do |config|
	config.vm.provider "virtualbox" do |vb|
		# Display the VirtualBox GUI when booting the machine
		vb.gui = false
		# Customize the amount of memory on the VM:
		vb.memory = 1024
		vb.cpus = 2
		vb.linked_clone = true
	end
   
	NODE_COUNT.times do |i|
		node_id = "node#{i}"
		ip_address = "10.10.10.#{i+3}"
				
		config.vm.define node_id do |node|
			node.vm.box = "geerlingguy/rockylinux8"
			node.vm.hostname = "#{node_id}"
			node.vm.network :private_network, ip: "#{ip_address}"
			
			# append all the nodes to /etc/hosts
			NODE_COUNT.times do |j|
				ipa = "10.10.10.#{j+3}"
				nid = "node#{j}"
				node.vm.provision "shell",
					args: [ "#{ipa}", "#{nid}" ],
					inline:	"echo \"$1    $2\" >> /etc/hosts"
			end
			
			# remove stupid message on login
			node.vm.provision "shell",
				inline:	"rm -f /etc/issue.d/cockpit.issue /etc/motd.d/cockpit"			

			#HTCondor params for installing the services
			#The first node is the controller
			htcondor_controller = "node0"
			htcondor_password   = "areallysecurepassword"
		  			
			if node.vm.hostname == "#{htcondor_controller}"
				node.vm.provision "shell", 
					args: ["#{htcondor_password}", "#{htcondor_controller}"],  
					inline:  <<-SHELL
					curl -fsSL https://get.htcondor.org | sed -e 's/do_configure_firewall //' | \
						GET_HTCONDOR_PASSWORD=$1 /bin/bash -s -- --no-dry-run --central-manager $2
					cat /etc/condor/config.d/01-central-manager.config | sed -e 's/get_htcondor_central_manager/get_htcondor_execute/' > /etc/condor/config.d/01-execute.config
					cat /etc/condor/config.d/01-central-manager.config | sed -e 's/get_htcondor_central_manager/get_htcondor_submit/'  > /etc/condor/config.d/01-submit.config
					systemctl enable --now condor
				  SHELL
			else
				node.vm.provision "shell", 
					args: ["#{htcondor_password}", "#{htcondor_controller}"], 
					inline: <<-SHELL
					curl -fsSL https://get.htcondor.org | sed -e 's/do_configure_firewall //' | \
						GET_HTCONDOR_PASSWORD=$1 /bin/bash -s -- --no-dry-run --execute $2
					cat /etc/condor/config.d/01-execute.config | sed -e 's/get_htcondor_execute/get_htcondor_submit/' > /etc/condor/config.d/01-submit.config
					systemctl enable --now condor
				  SHELL
			end
		end
	end  
end