[Bug 1377040] Re: /etc/init/network-interface.conf uses ifconfig, should use "ip" instead since ifconfig is deprecated..

[Brian Murray]

** Tags added: trusty utopic

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https://bugs.launchpad.net/bugs/1377040

Title:
  /etc/init/network-interface.conf uses ifconfig, should use "ip"
  instead since ifconfig is deprecated..

Status in “ifupdown” package in Ubuntu:
  Confirmed

Bug description:
  As the summary says
  /etc/init/network-interface.conf uses ifconfig but it should use "ip" instead:

  This is the line:
  ifconfig lo 127.0.0.1 up || true
  It probably should be:
  ip link set dev lo up || true

  This command fails on a clean minimal ubuntu install since net-tools
  that provides ifconfig isn't installed.

  There should be no need to set ip while bringing the interface up
  (which could interfere with future ipv4-only or ipv6-only setups) as
  the kernel configures it automatically.

  ----

  
  cat /etc/init/network-interface.conf 
  # network-interface - configure network device
  #
  # This service causes network devices to be brought up or down as a result
  # of hardware being added or removed, including that which isn't ordinarily
  # removable.

  description     "configure network device"

  emits net-device-up
  emits net-device-down
  emits static-network-up

  start on net-device-added
  stop on net-device-removed INTERFACE=$INTERFACE

  instance $INTERFACE
  export INTERFACE

  pre-start script
      if [ "$INTERFACE" = lo ]; then
          # bring this up even if /etc/network/interfaces is broken
          ifconfig lo 127.0.0.1 up || true
          initctl emit -n net-device-up \n            IFACE=lo LOGICAL=lo ADDRFAM=inet METHOD=loopback || true
      fi
      mkdir -p /run/network
      exec ifup --allow auto $INTERFACE
  end script

  post-stop exec ifdown --force --allow auto $INTERFACE

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