`Home <index.html>`_ OpenStack-Ansible Installation Guide

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Simple architecture: A single target host
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Overview
~~~~~~~~

This example uses the following parameters to configure networking on a
single target host. See `Figure 3.2, "Target hosts for infrastructure,
networking, compute, and storage
services" <targethosts-networkexample.html#fig_hosts-target-network-containerexample>`_
for a visual representation of these parameters in the architecture.

-  VLANs:

   -  Host management: Untagged/Native

   -  Container management: 10

   -  Tunnels: 30

   -  Storage: 20

   Networks:

   -  Host management: 10.240.0.0/22

   -  Container management: 172.29.236.0/22

   -  Tunnel: 172.29.240.0/22

   -  Storage: 172.29.244.0/22

   Addresses:

   -  Host management: 10.240.0.11

   -  Host management gateway: 10.240.0.1

   -  DNS servers: 69.20.0.164 69.20.0.196

   -  Container management: 172.29.236.11

   -  Tunnel: 172.29.240.11

   -  Storage: 172.29.244.11


**Figure 3.2. Target host for infrastructure, networking, compute, and
storage services**

.. image:: figures/networkarch-container-external-example.png

Modifying the network interfaces file
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

After establishing the initial host management network connectivity using
the ``bond0`` interface, modify the ``/etc/network/interfaces`` file as
described in this procedure.

Contents of the ``/etc/network/interfaces`` file:

#. Physical interfaces:

    .. code-block:: yaml

        # Physical interface 1
        auto eth0
        iface eth0 inet manual
            bond-master bond0
            bond-primary eth0

        # Physical interface 2
        auto eth1
        iface eth1 inet manual
            bond-master bond1
            bond-primary eth1

        # Physical interface 3
        auto eth2
        iface eth2 inet manual
            bond-master bond0

        # Physical interface 4
        auto eth3
        iface eth3 inet manual
            bond-master bond1

#. Bonding interfaces:

    .. code-block:: yaml

        # Bond interface 0 (physical interfaces 1 and 3)
        auto bond0
        iface bond0 inet static
            bond-slaves eth0 eth2
            bond-mode active-backup
            bond-miimon 100
            bond-downdelay 200
            bond-updelay 200
            address 10.240.0.11
            netmask 255.255.252.0
            gateway 10.240.0.1
            dns-nameservers 69.20.0.164 69.20.0.196

        # Bond interface 1 (physical interfaces 2 and 4)
        auto bond1
        iface bond1 inet manual
            bond-slaves eth1 eth3
            bond-mode active-backup
            bond-miimon 100
            bond-downdelay 250
            bond-updelay 250

#. Logical (VLAN) interfaces:

    .. code-block:: yaml

        # Container management VLAN interface
        iface bond0.10 inet manual
            vlan-raw-device bond0

        # OpenStack Networking VXLAN (tunnel/overlay) VLAN interface
        iface bond1.30 inet manual
            vlan-raw-device bond1

        # Storage network VLAN interface (optional)
        iface bond0.20 inet manual
            vlan-raw-device bond0


#. Bridge devices:

    .. code-block:: yaml

        # Container management bridge
        auto br-mgmt
        iface br-mgmt inet static
            bridge_stp off
            bridge_waitport 0
            bridge_fd 0
            # Bridge port references tagged interface
            bridge_ports bond0.10
            address 172.29.236.11
            netmask 255.255.252.0
            dns-nameservers 69.20.0.164 69.20.0.196

        # OpenStack Networking VXLAN (tunnel/overlay) bridge
        auto br-vxlan
        iface br-vxlan inet static
            bridge_stp off
            bridge_waitport 0
            bridge_fd 0
            # Bridge port references tagged interface
            bridge_ports bond1.30
            address 172.29.240.11
            netmask 255.255.252.0

        # OpenStack Networking VLAN bridge
        auto br-vlan
        iface br-vlan inet manual
            bridge_stp off
            bridge_waitport 0
            bridge_fd 0
            # Bridge port references untagged interface
            bridge_ports bond1

        # Storage bridge
        auto br-storage
        iface br-storage inet static
            bridge_stp off
            bridge_waitport 0
            bridge_fd 0
            # Bridge port reference tagged interface
            bridge_ports bond0.20
            address 172.29.244.11
            netmask 255.255.252.0


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