openstack-ansible/doc/source/install-guide/targethosts-networkrefarch.rst

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Reference architecture

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

Procedure 4.1. Modifying the 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 HOST_IP_ADDRESS
       netmask HOST_NETMASK
       gateway HOST_GATEWAY
       dns-nameservers HOST_DNS_SERVERS
   
   # 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

   If not already complete, replace ``HOST_IP_ADDRESS``, ``HOST_NETMASK``, ``HOST_GATEWAY``, and ``HOST_DNS_SERVERS`` with the appropriate configuration for the host management network.

3. Logical (VLAN) interfaces:

   # Container management VLAN interface
   iface bond0.CONTAINER_MGMT_VLAN_ID inet manual
       vlan-raw-device bond0
   
   # OpenStack Networking VXLAN (tunnel/overlay) VLAN interface
   iface bond1.TUNNEL_VLAN_ID inet manual
       vlan-raw-device bond1
   
   # Storage network VLAN interface (optional)
   iface bond0.STORAGE_VLAN_ID inet manual
       vlan-raw-device bond0

   Replace ``_VLAN_ID``* with the appropriate configuration for the environment.

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.CONTAINER_MGMT_VLAN_ID
       address CONTAINER_MGMT_BRIDGE_IP_ADDRESS
       netmask CONTAINER_MGMT_BRIDGE_NETMASK
       dns-nameservers CONTAINER_MGMT_BRIDGE_DNS_SERVERS
   
   # 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.TUNNEL_VLAN_ID
       address TUNNEL_BRIDGE_IP_ADDRESS
       netmask TUNNEL_BRIDGE_NETMASK
   
   # 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 (optional)
   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.STORAGE_VLAN_ID
       address STORAGE_BRIDGE_IP_ADDRESS
       netmask STORAGE_BRIDGE_NETMASK

   Replace ``_VLAN_ID*, *_BRIDGE_IP_ADDRESS``, and ``_BRIDGE_NETMASK*, *_BRIDGE_DNS_SERVERS`` with the appropriate configuration for the environment.

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