all in one file with VMware-desktop

vmware/Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+
+#$script = <<-SCRIPT
+#/usr/bin/sed -ie '/sw1/d' /etc/hosts 
+#SCRIPT
+
+Vagrant.configure("2") do |config|
+  config.vm.provider "vmware_desktop" do |v|
+    v.vmx["memsize"] = "3000"
+    v.vmx["numvcpus"] = "2"
+  end
+
+  config.vm.box = "generic/debian9"
+#  config.vm.box = "bento/ubuntu-20.04"
+
+  config.vm.define "sw1" do |sw1|
+    sw1.vm.hostname = "sw1"
+    sw1.vm.network "private_network",bridge: "bridge1"
+
+    # build entry for /etc/hosts
+    sw1.trigger.after :up do |trigger|
+       trigger.info = "Build entry for /etc/hosts"
+       trigger.run = {path: './list_hosts.sh', args: ['add', sw1.vm.hostname]}
+    end
+    # remove entry for /etc/hosts
+    sw1.trigger.before :destroy do |trigger|
+       trigger.info = "Remove entry for /etc/hosts"
+       trigger.run = {path: './list_hosts.sh', args: ['rm', sw1.vm.hostname]}
+    end
+  end
+
+  config.vm.define "sw2" do |sw2|
+    sw2.vm.hostname = "sw2"
+    sw2.vm.network "private_network",bridge: "brdige1"
+    sw2.vm.network "private_network",bridge: "bridge2"
+
+    # build entry for /etc/hosts
+    sw2.trigger.after :up do |trigger|
+       trigger.info = "Build entry for /etc/hosts"
+       trigger.run = {path: './list_hosts.sh', args: ['add', sw2.vm.hostname]}
+    end
+    # remove entry for /etc/hosts
+    sw2.trigger.before :destroy do |trigger|
+       trigger.info = "Remove entry for /etc/hosts"
+       trigger.run = {path: './list_hosts.sh', args: ['rm', sw2.vm.hostname]}
+    end
+  end
+
+  config.vm.define "sw3" do |sw3|
+    sw3.vm.hostname = "sw3"
+    sw3.vm.network "private_network",bridge: "bridge2"
+
+    # build entry for /etc/hosts
+    sw3.trigger.after :up do |trigger|
+       trigger.info = "Build entry for /etc/hosts"
+       trigger.run = {path: './list_hosts.sh', args: ['add', sw3.vm.hostname]}
+    end
+    # remove entry for /etc/hosts
+    sw3.trigger.before :destroy do |trigger|
+       trigger.info = "Remove entry for /etc/hosts"
+       trigger.run = {path: './list_hosts.sh', args: ['rm', sw3.vm.hostname]}
+    end
+  end
+
+#  config.vm.provision "shell", inline: $script
+
+  config.vm.provision "shell", inline: <<-SHELL
+    echo -e "vagrant\nvagrant" | passwd root
+    echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
+    sed -in 's/PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config
+    service ssh restart
+  SHELL
+
+end

vmware/list_hosts.sh

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+#!/bin/bash
+touch hosts
+
+if [[ $1 == 'add' ]]
+then
+  ip=$(vagrant ssh $2 -c "ip -4 addr show  eth0 | grep -oP '(?<=inet\s)\d+(\.\d+){3}'")
+  echo "$ip $2" >> hosts
+fi
+
+if [[ $1 == 'rm' ]]
+then
+  sed -ie "/ $2\$/d" hosts
+fi