Class: Bosh::Agent::Platform::Ubuntu::Network

Inherits:
Linux::Network show all
Includes:
Exec
Defined in:
lib/bosh_agent/platform/ubuntu/network.rb

Instance Method Summary collapse

Methods inherited from Linux::Network

#dns, #setup_dhcp_from_settings, #setup_networking, #setup_networking_from_settings

Constructor Details

#initialize(template_dir) ⇒ Network

Returns a new instance of Network.



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# File 'lib/bosh_agent/platform/ubuntu/network.rb', line 7

def initialize(template_dir)
  super
end

Instance Method Details

#restart_dhclient ⇒ Object

Executing /sbin/dhclient starts another dhclient process, so it’ll cause a conflict with the existing system dhclient process and dns changes will be flip floping each lease time. So in order to refresh dhclient configuration we need to restart networking.

If dhclient3 cannot release a lease because it collides with a network restart (message “receive_packet failed on eth0: Network is down” appears at /var/log/syslog) then the old dhclient3 process won’t be killed (see bug LP #38140), and there will be two dhclient3 process running (and dns changes will be flip floping each lease time). So before restarting the network, we first kill all dhclient3 process.



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# File 'lib/bosh_agent/platform/ubuntu/network.rb', line 62

def restart_dhclient
  sh('pkill dhclient', :on_error => :return)
  sh('/etc/init.d/networking restart', :on_error => :return)
end

#restart_networking_service ⇒ Object 



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# File 'lib/bosh_agent/platform/ubuntu/network.rb', line 21

def restart_networking_service
  # ubuntu 10.04 networking startup/upstart stuff is quite borked
  networks.each do |k, v|
    interface = v['interface']
    @logger.info("Restarting #{interface}")
    output = sh("service network-interface stop INTERFACE=#{interface}").output
    output += sh("service network-interface start INTERFACE=#{interface}").output
    @logger.info("Restarted networking: #{output}")
  end
end

#write_dhcp_conf ⇒ Object 



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# File 'lib/bosh_agent/platform/ubuntu/network.rb', line 32

def write_dhcp_conf
  template = ERB.new(load_erb('dhclient_conf.erb'), 0, '%<>-')
  result = template.result(binding)

  updated = nil

  if File.exists?('/etc/dhcp3/dhclient.conf')
    # Ubuntu 10.04 dhclient config located in /etc/dhcp3
    updated = Bosh::Agent::Util::update_file(result, '/etc/dhcp3/dhclient.conf')
  else
    updated = Bosh::Agent::Util::update_file(result, '/etc/dhcp/dhclient.conf')
  end

  if updated
    @logger.info('Updated dhclient.conf')
    restart_dhclient
  end
end

#write_network_interfaces ⇒ Object 



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# File 'lib/bosh_agent/platform/ubuntu/network.rb', line 11

def write_network_interfaces
  template = ERB.new(load_erb('interfaces.erb'), 0, '%<>-')
  result = template.result(binding)
  network_updated = Bosh::Agent::Util::update_file(result, '/etc/network/interfaces')
  if network_updated
    @logger.info('Updated networking')
    restart_networking_service
  end
end