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

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Reference architecture

Overview

This example allows you to use your own parameters for the deployment.

The following is a table of the bridges that are be configured on hosts, if you followed the previously proposed design.

Bridge name	Best configured on	With a static IP
br-mgmt	On every node	Always
	On every storage node	When component is deployed on metal

+ br-storage +-----------------------+-------------------------------------+ | | On every compute node | Always | +-------------+-----------------------+-------------------------------------+ | | On every network node | When component is deployed on metal | + br-vxlan +-----------------------+-------------------------------------+ | | On every compute node | Always | +-------------+-----------------------+-------------------------------------+ | | On every network node | Never | + br-vlan +-----------------------+-------------------------------------+ | | On every compute node | Never | +-------------+-----------------------+-------------------------------------+

Modifying the network interfaces file

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.

Example for 3 controller nodes and 2 compute nodes

• 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 for the controller nodes:
  • Host management: 10.240.0.11 - 10.240.0.13
  • Host management gateway: 10.240.0.1
  • DNS servers: 69.20.0.164 69.20.0.196
  • Container management: 172.29.236.11 - 172.29.236.13
  • Tunnel: no IP (because IP exist in the containers, when the components aren't deployed directly on metal)
  • Storage: no IP (because IP exist in the containers, when the components aren't deployed directly on metal)
• Addresses for the compute nodes:
  • Host management: 10.240.0.21 - 10.240.0.22
  • Host management gateway: 10.240.0.1
  • DNS servers: 69.20.0.164 69.20.0.196
  • Container management: 172.29.236.21 - 172.29.236.22
  • Tunnel: 172.29.240.21 - 172.29.240.22
  • Storage: 172.29.244.21 - 172.29.244.22

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