new post: Fixing a Vagrant "hostonlyif" error

_posts/2014-01-20-fixing-a-vagrant-hostonlyif-error.md

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+---
+layout: post
+title: Fixing a Vagrant "hostonlyif" error
+date: 20.01.2014 13:24
+---
+
+------
+
+**tl;dr:** Load the correct module: `sudo modprobe vboxnetadp`
+
+------
+
+I recently came across an article about LXC, [Exploring LXC Networking][1],
+which used [Vagrant][2] to get a development machine up and running.
+
+I wanted to try it, but stumbled across a problem for which I mostly found the OS X solution:
+
+~~~bash
+sudo /Library/StartupItems/VirtualBox/VirtualBox restart
+~~~
+
+But this does not work on Linux. I finally found the working solution in the
+post [Resolve a hostonlyif create error with vagrant][3]. So for full documentation I repeat it here again.
+
+I used the following Vagrant file:
+
+~~~ruby
+Vagrant.configure(2) do |config|
+  config.vm.box = "precise64"
+  config.vm.box_url = "http://files.vagrantup.com/precise64.box"
+
+  config.vm.provision :shell, :inline => pkg_cmd
+
+  # Create a private network
+  config.vm.network :private_network, ip: "10.0.4.2"
+
+  # Create a public network
+  config.vm.network :public_network
+end
+~~~
+
+After `vagrant up` I got the following error:
+
+~~~bash
+$ vagrant up
+Bringing machine 'default' up with 'virtualbox' provider...
+[default] Clearing any previously set forwarded ports...
+[default] Clearing any previously set network interfaces...
+There was an error while executing `VBoxManage`, a CLI used by Vagrant
+for controlling VirtualBox. The command and stderr is shown below.
+
+Command: ["hostonlyif", "create"]
+
+Stderr: 0%...
+Progress state: NS_ERROR_FAILURE
+VBoxManage: error: Failed to create the host-only adapter
+VBoxManage: error: VBoxNetAdpCtl: Error while adding new interface: failed to open /dev/vboxnetctl:
+  No such file or directory
+
+VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component HostNetworkInterface,
+  interface IHostNetworkInterface
+VBoxManage: error: Context: "int handleCreate(HandlerArg*, int, int*)" at line 68 of file VBoxManageHostonly.cpp
+~~~
+
+Loading the right kernel module helped:
+
+~~~bash
+sudo modprobe vboxnetadp
+~~~
+
+After that `vagrant up` worked as expected and the machine was accessible via SSH:
+
+~~~bash
+Bringing machine 'default' up with 'virtualbox' provider...
+[default] Clearing any previously set forwarded ports...
+[default] Clearing any previously set network interfaces...
+[default] Available bridged network interfaces:
+1) wlan0
+2) eth0
+What interface should the network bridge to? 1
+[default] Preparing network interfaces based on configuration...
+[default] Forwarding ports...
+[default] -- 22 => 2222 (adapter 1)
+[default] Booting VM...
+[default] Waiting for machine to boot. This may take a few minutes...
+[default] Machine booted and ready!
+[default] Configuring and enabling network interfaces...
+[default] Mounting shared folders...
+[default] -- /vagrant
+[default] VM already provisioned. Run `vagrant provision` or use `--provision` to force it
+~~~
+
+[1]: http://containerops.org/2013/11/19/lxc-networking/
+[2]: http://www.vagrantup.com/
+[3]: https://coderwall.com/p/ydma0q