130 lines
4.6 KiB
Ruby
130 lines
4.6 KiB
Ruby
require 'tempfile'
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require 'ipaddr'
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require "vagrant/util/template_renderer"
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module VagrantPlugins
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module GuestNixos
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module Cap
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class ConfigureNetworks
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include Vagrant::Util
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def self.configure_networks(machine, networks)
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# set the prefix length.
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networks.each do |network|
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network[:prefix_length] = (network[:netmask] && netmask_to_cidr(network[:netmask]))
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end
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# set the device names.
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assign_device_names(machine, networks)
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# upload the config file
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network_module = TemplateRenderer.render("guests/nixos/network", networks: networks)
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upload(machine, network_module, "/etc/nixos/vagrant-network.nix")
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end
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# Set :device on each network.
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# Attempts to use biosdevname when available to detect interface names,
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# and falls back to ifconfig otherwise.
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def self.assign_device_names(machine, networks)
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if machine.communicate.test("command -v biosdevname")
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# use biosdevname to get info about the interfaces
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interfaces = get_interfaces(machine)
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if machine.provider.capability?(:nic_mac_addresses)
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# find device name by MAC lookup.
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mac_addresses = machine.provider.capability(:nic_mac_addresses)
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networks.each do |network|
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mac_address = mac_addresses[network[:interface]+1]
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interface = interfaces.detect {|nic| nic[:mac_address].gsub(":","") == mac_address} if mac_address
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network[:device] = interface[:kernel] if interface
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end
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else
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# assume interface numbers correspond to (ethN+1).
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networks.each do |network|
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interface = interfaces.detect {|nic| nic[:ethn] == network[:interface]}
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network[:device] = interface[:kernel] if interface
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end
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end
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else
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# assume interface numbers correspond to the order of interfaces.
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interfaces = get_interface_names(machine)
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networks.each do |network|
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network[:device] = interfaces[network[:interface]]
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end
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end
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end
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def self.get_interface_names(machine)
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output = nil
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machine.communicate.execute("ifconfig -a") do |type, result|
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output = result.chomp if type == :stdout
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end
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names = output.scan(/^[^:\s]+/).reject {|name| name =~ /^lo/ }
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names
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end
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# Upload a file.
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def self.upload(machine, content, remote_path)
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local_temp = Tempfile.new("vagrant-upload")
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local_temp.binmode
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local_temp.write(content)
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local_temp.close
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remote_temp = mktemp(machine)
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machine.communicate.upload(local_temp.path, "#{remote_temp}")
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local_temp.delete
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machine.communicate.sudo("mv #{remote_temp} #{remote_path}")
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end
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# Create a temp file.
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def self.mktemp(machine)
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path = nil
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machine.communicate.execute("mktemp --suffix -vagrant-upload") do |type, result|
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path = result.chomp if type == :stdout
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end
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path
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end
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# using biosdevname, get all interfaces as a list of hashes, where:
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# :kernel - the kernel's name for the device,
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# :ethn - the calculated ethN-style name converted to integer.
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# :mac_address - the permanent mac address. ethN-style name converted to integer.
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def self.get_interfaces(machine)
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interfaces = []
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# get all adapters, as named by the kernel
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output = nil
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machine.communicate.sudo("biosdevname -d") do |type, result|
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output = result if type == :stdout
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end
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kernel_if_names = output.scan(/Kernel name: ([^\n]+)/).flatten
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mac_addresses = output.scan(/Permanent MAC: ([^\n]+)/).flatten
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# get ethN-style names
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ethns = []
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kernel_if_names.each do |name|
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machine.communicate.sudo("biosdevname --policy=all_ethN -i #{name}") do |type, result|
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ethns << result.gsub(/[^\d]/,'').to_i if type == :stdout
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end
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end
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# populate the interface list
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kernel_if_names.each_index do |i|
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interfaces << {
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kernel: kernel_if_names[i],
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ethn: ethns[i],
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mac_address: mac_addresses[i]
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}
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end
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interfaces
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end
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def self.netmask_to_cidr(mask)
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IPAddr.new(mask).to_i.to_s(2).count("1")
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end
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end
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end
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end
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end
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