[Bug 1499000] Re: interfaces not brought up when ovs is started

[James Page]

I remember something like this in older ovs versions where the ifup was
called by the init script; however that appears to have been dropped at
some point in time both in Ubuntu and upstream in OVS as well.

I think that a manual ifup is required after installation of ovs - this
will hook into the ovs supplied ifupdown scripts that manage the
interfaces (and also start OVS if its not started - that might be the
reason why it was dropped from the init/systemd/upstart scripts).

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https://bugs.launchpad.net/bugs/1499000

Title:
  interfaces not brought up when ovs is started

Status in openvswitch package in Ubuntu:
  Won't Fix

Bug description:
  when ovs is started [e.g. systemctl start openvswitch-switch.service],
  the services [ovsdb-server and ovs-vswitchd] are started, but no
  interfaces are brought up.  running ifup --allow=ovs br0 manually
  after ovs starts does bring up the interfaces.

  >cat /etc/network/interfaces
  # 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

  # bridge
  #auto br0
  allow-ovs br0
  iface br0 inet manual
  	ovs_type	OVSBridge
  	ovs_ports	eth0 br0-host

  # physical interface
  #auto eth0
  allow-br0 eth0
  iface eth0 inet manual
  	ovs_type	OVSPort
  	ovs_bridge	br0

  # internal interface [host os]
  allow-br0 br0-host
  iface br0-host inet static
  	ovs_type	OVSIntPort
  	ovs_bridge	br0
  	ovs_options 	tag=681
  	address		10.68.40.120/17
  	gateway		10.68.60.1

  additionally, stopping ovs stops the services, but the interfaces
  remain.

  1] >lsb_release -rd
  Description:	Ubuntu 15.04
  Release:	15.04

  2] >apt-cache policy openvswitch-switch
  openvswitch-switch:
    Installed: 2.3.1-0ubuntu1
    Candidate: 2.3.1-0ubuntu1
    Version table:
   *** 2.3.1-0ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
          100 /var/lib/dpkg/status

  3] i expected the configured interfaces to be brought up
  4] they were not

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