openstack-ansible/doc/source/install-guide/targethosts-networkexample.rst
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Simple architecture: A single target host

Overview

This example uses the following parameters to configure networking on a single target host. See Figure 3.2 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

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:

  1. Physical interfaces:

    # 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
  2. Bonding interfaces:

    # 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
  3. Logical (VLAN) interfaces:

    # 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
  4. Bridge devices:

    # 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