[Bug 1084028] Re: openvswitch based interfaces not started in time during boot

[Waldek Koźba]

Ubuntu 14.04.5 (Open vSwitch) 2.0.2 (installed with apt install
openvswitch-switch)

Following configuration works for me, also after reboot:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-br-ex eth0
iface eth0 inet manual
ovs_type OVSPort
ovs_bridge br-ex

# The OVS bridge interface
auto br-ex
allow-ovs br-ex
iface br-ex inet static
ovs_type OVSBridge
ovs_ports eth0
address 172.24.6.11
netmask 255.255.255.0
gateway 172.24.6.1
dns-nameservers 8.8.8.8

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https://bugs.launchpad.net/bugs/1084028

Title:
  openvswitch based interfaces not started in time during boot

Status in openvswitch package in Ubuntu:
  Fix Released

Bug description:
  If you create network interfaces (access ports) in openvswitch, and
  configure them in /etc/network/interfaces, failsafe.conf will kick in
  and the interfaces get configured after failsafe.conf exits. This adds
  two minutes to boot time.

  openvswitch config:

  ovs-vsctl show
  93e6b401-214b-4089-ac51-27ca43009cce
      Bridge "br0"
          Port "br0"
              Interface "br0"
                  type: internal
          Port "vlan128"
              tag: 128
              Interface "vlan128"
                  type: internal
          Port "bond0"
              trunks: [128]
              Interface "eth0"
              Interface "eth5"
      Bridge "br1"
          Port "bond1"
              trunks: [143, 145]
              Interface "eth1"
              Interface "eth4"
          Port "phy-br1"
              Interface "phy-br1"
          Port "br1"
              Interface "br1"
                  type: internal
          Port "int-br1"
              Interface "int-br1"
      ovs_version: "1.4.3"

  cat /etc/network/interfaces:

  # interfaces(5) file used by ifup(8) and ifdown(8)
  auto lo
  iface lo inet loopback

  auto eth0
  iface eth0 inet manual
        pre-up ip link set $IFACE up
        post-down ip link set $IFACE down

  auto eth1
  iface eth1 inet manual
        pre-up ip link set $IFACE up
        post-down ip link set $IFACE down

  auto eth4
  iface eth4 inet manual
        pre-up ip link set $IFACE up
        post-down ip link set $IFACE down

  auto eth5
  iface eth5 inet manual
        pre-up ip link set $IFACE up
        post-down ip link set $IFACE down

  auto vlan128
  iface vlan128 inet static
      address 172.17.128.102
      netmask 255.255.255.0

  I expected openvswitch (interfaces/ports/bonds/trunks) to be up-and-
  running before /etc/network/interfaces gets evaluated.

  Clint Byrum (Ubuntu) reported me the following:

   "failsafe.conf will exit when all interfaces marked as 'auto' are "up". The
  only time you get a 2 minute delay is when it takes that long to bring those
  interfaces up. Since you have these vlanXXX interfaces listed, the system
  is waiting for them to come up.

  It seems to me that openvswitch needs to be brought up before runlevel 2, and
  so probably needs an upstart job. This sounds like a clear bug."

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