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require 'set'
require 'tempfile'
require "vagrant/util/template_renderer"
module VagrantPlugins
module GuestDebian
module Cap
class ConfigureNetworks
include Vagrant::Util
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/debian/network_#{network[:type]}",
options: network)
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
end
end
end
end
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