Class: VagrantPlugins::GuestAlpine::Cap::ConfigureNetworks

Inherits:
Object
  • Object
show all
Includes:
Vagrant::Util
Defined in:
lib/vagrant-alpine/cap/configure_networks.rb

Class Method Summary collapse

Class Method Details

.configure_networks(machine, networks) ⇒ Object 



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# File 'lib/vagrant-alpine/cap/configure_networks.rb', line 20

def self.configure_networks(machine, networks)
  machine.communicate.tap do |comm|
    # First, remove any previous network modifications
    # from the interface file.
    comm.sudo("sed -e '/^#VAGRANT-BEGIN/,$ d' /etc/network/interfaces > /tmp/vagrant-network-interfaces.pre")
    comm.sudo("sed -ne '/^#VAGRANT-END/,$ p' /etc/network/interfaces | tail -n +2 > /tmp/vagrant-network-interfaces.post")

    # Accumulate the configurations to add to the interfaces file as
    # well as what interfaces we're actually configuring since we use that
    # later.
    interfaces = Set.new
    entries = []
    networks.each do |network|
      interfaces.add(network[:interface])
      entry = TemplateRenderer.render("guests/alpine/network_#{network[:type]}", { options: network, template_root: source_root.join('templates') })
      entries << entry
    end

    # Perform the careful dance necessary to reconfigure
    # the network interfaces
    temp = Tempfile.new('vagrant')
    temp.binmode
    temp.write(entries.join("\n"))
    temp.close

    comm.upload(temp.path, '/tmp/vagrant-network-entry')

    # Bring down all the interfaces we're reconfiguring. By bringing down
    # each specifically, we avoid reconfiguring eth0 (the NAT interface) so
    # SSH never dies.
    interfaces.each do |interface|
      comm.sudo("/sbin/ifdown eth#{interface} 2> /dev/null")
      comm.sudo("/sbin/ip addr flush dev eth#{interface} 2> /dev/null")
    end

    comm.sudo('cat /tmp/vagrant-network-interfaces.pre /tmp/vagrant-network-entry /tmp/vagrant-network-interfaces.post > /etc/network/interfaces')
    comm.sudo('rm -f /tmp/vagrant-network-interfaces.pre /tmp/vagrant-network-entry /tmp/vagrant-network-interfaces.post')

    # Bring back up each network interface, reconfigured
    interfaces.each do |interface|
      comm.sudo("/sbin/ifup eth#{interface}")
    end
  end
end

.source_root ⇒ Object 



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# File 'lib/vagrant-alpine/cap/configure_networks.rb', line 16

def self.source_root
  @source_root ||= Pathname.new(File.expand_path('../../../../', __FILE__))
end