Host only adapter cannot be configured when its name not is a standard eth* name

[root-io]

https://github.com/mitchellh/vagrant/issues/4288

[terrywang]

From Linux guest perspective, ethX to enpXsY naming scheme change is due to the move from SysV init to systemd (systemd-udevd).

The following distributions have already switched to systemd

• Arch Linux
• Fedora 20
• openSUSE 13.1
• RHEL 7
• CentOS 7
• Oracle Linux 7
• Debian jessie testing (can use systemd as default init system)

Before Vagrant fixes this in its own code, an easy temporary workaround is to pass net.ifnames=0 to kernel boot parameters to revert to the old NIC naming scheme.

That's why I updated the Arch Linux and Oracle Linux 7.0 base box with the information.

[root-io]

Thanks for clarification :)

[ibizaman]

I wanted to set a private_network in my Vagrantfile and vagrant complained that eth1 did not exist. My goal was to ssh in the vagrant box with putty so I needed an ip (so no vagrant ssh).

But there's a workaround: by parsing the output of vagrant ssh-config, you can get the ip address and the port (127.0.0.1 and 2222 for me). So no need for eth1!

[terrywang]

@ibizaman 127.0.0.1 port 2222 was the default Vagrant networking mode. It is set through a port forwarding rule of the first virtual NIC. It is how vagrant ssh connects to the vagrant box.

Please note private network in Vagrant is different networking mode. Private network is equivalent to Host-only networking in VirtualBox.

[ibizaman]

My bad, you are totally right!

I suppose the port changes when there are multiple vagrant boxes active? Parsing vagrant ssh-config should be useful then, right?

[terrywang]

@ibizaman You are right. I haven't used vagrant ssh-config to be honest ;-D

When using port forwarding with NAT networking, we can use auto_correct in Vagrantfile to auto correct any collisions. Like below.

Vagrant.configure("2") do |config|
  config.vm.network "forwarded_port", guest: 80, host: 8080,
    auto_correct: true
end

In addition, VAGRANT_LOG=info vagrant up or vagrant up --debug should also be helpful if things like that happen. Hope it helps.

[seekshiva]

@terrywang I'm a bit of a noob in this. How do I set the kernel boot parameters?

[root-io]

@seekshiva

$ sed -i -e "s/GRUB_CMDLINE_LINUX=\"\"/GRUB_CMDLINE_LINUX=\"net.ifnames=0\"/g" /etc/default/grub
$ grub-mkconfig -o /boot/grub/grub.cfg

[lmmarsano]

@terrywang

pass net.ifnames=0 to kernel boot parameters

Another solution is

sudo ln -s /dev/null /etc/udev/rules.d/80-net-setup-link.rules

PS I see a symbolic link from /etc/udev/rules.d/80-net-name-slot.rules to /dev/null. This was the old name for 80-net-setup-link.rules, and it no longer works, evidently. According to systemd documentation, the new name is the one I wrote above; I suggest updating the file name. Anyone curious should see the documentation for all 4 solutions, which include terrywang's.

I hope vagrant figures out systemd soon, so we can forget this.