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[Eugene Nikanorov <enikanorov@xxxxxxxxxxxx>]

** Project changed: neutron => devstack

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https://bugs.launchpad.net/bugs/1403625

Title:
  devstack defaults to VXLAN even though ENABLE_TENANT_TUNNELS is False
  in local.conf

Status in devstack - openstack dev environments:
  New

Bug description:
  Branch info:

  slogan@slogan-virtual-machine:~/devstack$ git branch
  * master
  slogan@slogan-virtual-machine:~/devstack$ git log | head
  commit 062e8f14874ab254aa756aabb4f50db222277431
  Merge: 7f80280 7bb9a73
  Author: Jenkins <jenkins@xxxxxxxxxxxxxxxxxxxx>
  Date:   Tue Dec 16 22:02:41 2014 +0000

      Merge "Adds missing rabbit_userid to trove configs"

  commit 7f8028069883b8214bd2aae56f78514a4fddddbe
  Merge: affcf87 dc31f76
  Author: Jenkins <jenkins@xxxxxxxxxxxxxxxxxxxx>

  local.conf:

  [[local|localrc]]
  disable_service n-net
  enable_service q-l3
  enable_service q-svc
  enable_service q-agt
  enable_service q-dhcp
  enable_service q-meta
  enable_service neutron
  ADMIN_PASSWORD=password
  DATABASE_PASSWORD=$ADMIN_PASSWORD
  RABBIT_PASSWORD=$ADMIN_PASSWORD
  SERVICE_PASSWORD=$ADMIN_PASSWORD
  SERVICE_TOKEN=a682f596-76f3-11e3-b3b2-e716f9080d50
  FIXED_RANGE=10.4.128.0/20
  #FLOATING_RANGE=192.168.1.20/30
  #HOST_IP=localhost
  HOST_IP=192.168.1.220
  PUBLIC_INTERFACE=eth0
  FLAT_INTERFACE=br-int
  FLAT_NETWORK_BRIDGE=br-eth0
  NETWORK_GATEWAY=10.4.128.1
  FIXED_NETWORK_SIZE=4096
  SCHEDULER=nova.scheduler.filter_scheduler.FilterScheduler
  Q_PLUGIN=ml2
  OFFLINE=True
  ACTIVE_TIMEOUT=120
  ASSOCIATE_TIMEOUT=60
  BOOT_TIMEOUT=120
  SERVICE_TIMEOUT=120
  EXTRA_OPTS=(metadata_host=$HOST_IP)

  # Allow tenants to create vlans

  ENABLE_TENANT_VLANS=True
  ENABLE_TENANT_TUNNELS=False
  ML2_VLAN_RANGES=physnet1:1100:2999

  # these are needed fo VLANs for tenants to connect to physical switch

  PHYSICAL_NETWORK=default
  OVS_PHYSICAL_BRIDGE=br-int

  Q_DHCP_EXTRA_DEFAULT_OPTS=(enable_metadata_network=True
  enable_isolated_metadata=True)

  Notice I don't have Q_ML2_TENANT_NETWORK_TYPE setm but I am saying I
  want VLANS and I don't want tunnels (and I haven't defined anything
  else related to tunnels, e.g., VNI ranges).

  When I run ./stack.sh with the above, I noticed that br-tun is
  created:

  slogan@slogan-virtual-machine:~/devstack$ sudo ovs-vsctl show
  2d7ac7cc-4358-41e7-afd4-3c5a0081d79f
      Bridge br-ex
          Port br-ex
              Interface br-ex
                  type: internal
          Port "qg-db338515-8c"
              Interface "qg-db338515-8c"
                  type: internal
      Bridge br-tun
          Port br-tun
              Interface br-tun
                  type: internal
          Port patch-int
              Interface patch-int
                  type: patch
                  options: {peer=patch-tun}
      Bridge br-int
  ...

  Also, in ml2_conf.ini:

  [ml2]
  tenant_network_types = vxlan
  type_drivers = local,flat,vlan,gre,vxlan
  mechanism_drivers = openvswitch,linuxbridge
  ...

  The code in question is in devstack/lib/neutron_plugins/ml2:

  Q_ML2_TENANT_NETWORK_TYPE=${Q_ML2_TENANT_NETWORK_TYPE:-"vxlan"}
  # This has to be set here since the agent will set this in the config file
  if [[ "$Q_ML2_TENANT_NETWORK_TYPE" == "gre" || "$Q_ML2_TENANT_NETWORK_TYPE" == "vxlan" ]]; then
      Q_TUNNEL_TYPES=$Q_ML2_TENANT_NETWORK_TYPE
  elif [[ "$ENABLE_TENANT_TUNNELS" == "True" ]]; then
      Q_TUNNEL_TYPES=gre
  fi

  The above code sets the tenant network type to vxlan if not specified
  (as a default). I think the code should account for the
  ENABLE_TENANT_TUNNELS and ENABLE_TENANT_VLANS when defining the
  default.

  Notice that the wiki has a devstack sample that led me down this path,
  I'd like to see the code match this wiki by fixing this bug (I think
  the wiki is fine, it's the script that needs fixing).

  Configure devstack for ML2 with VLANs
  An example control and compute node localrc file is shown here for configuring ML2 to run with VLANs with devstack. This is equivalent to running the OVS or LinuxBridge plugins in VLAN mode.

  Add the following to your control node localrc:
  Q_PLUGIN=ml2
  ENABLE_TENANT_VLANS=True
  ML2_VLAN_RANGES=mynetwork:100:200
  To set special VLAN parameters for the VLAN TypeDriver, the following variable in localrc can be used. This is a space separate list of assignment values:
  Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS=(network_vlan_ranges=600:700)

  (the above is from https://wiki.openstack.org/wiki/Neutron/ML2

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