流浪者管理主机dhcp

Question

I want to automatically add/remove an entry alias to/from my /etc/hosts file based on the project's dirname and VM's IP address every time I run vagrant up / vagrant destroy . There are some plugins doing this but without support for dhcp.

I'm building the dirname using machine_name = File.basename(File.expand_path('..', Dir.pwd)) + '.local' .

The other piece of the puzzle that I'm missing is a way to get the VM's dhcp assigned IP address in the Vagrantfile and update /etc/hosts file on the host machine.

My goal is to spin-up a VM without editing it's name and/or IP in the Vagrantfile and /etc/hosts.

I'm using Vagrant 1.7.4, VirtualBox 5.x and Puppet 4.2.

Any ideas?

Answer 1

I've installed vagrant-hostmanager which has a very helpful config.hostmanager.ip_resolver option.

Add the following code to your Vagrantfile to make sure your /etc/hosts file is updated when you run the vagrant up command:

config.vm.hostname = "add-name-here"

unless Vagrant.has_plugin?('vagrant-hostmanager')
    raise 'vagrant-hostmanager is not installed!'
else
    config.hostmanager.enabled = true
    config.hostmanager.manage_host = true
    config.hostmanager.ignore_private_ip = false
    config.hostmanager.include_offline = true
    config.hostmanager.ip_resolver = proc do |vm, resolving_vm|
        if hostname = (vm.ssh_info && vm.ssh_info[:host])
            `vagrant ssh -c "hostname -I"`.split()[1]
        end
    end
end

Credits to: https://github.com/smdahlen/vagrant-hostmanager/issues/86#issuecomment-107052823

Answer 2

you should be able to do this.

Remember that the vagrant file is ruby? write a provisioning shell script that sets up /etc/hosts and pass it as an arg in the Vagrant file the location of the file (sort of like the File.exapand above).

This way when vagrant runs the script it will generate the parameter and the provision script will pick it up and use it.

for reference: https://docs.vagrantup.com/v2/provisioning/shell.html

Answer 3

You should be able to use vagrant-dns for this purpose, it looks it does most of what you're trying to achieve (although as said by Mircea, almost everything can be done with scripting)

The doc gives an example using a private network but you can as well use the following config

  config.vm.box = "ubuntu-12.04"

  config.dns.tld = "dev"
  config.vm.hostname = "test-machine"

  config.vm.network "public_network"
  config.vm.network "forwarded_port", guest: 80, host: 8080

After vagrant-dns has been installed (run vagrant dns --install ) you will be able to access your machine with www.test-machine.dev:8080