Configure the two-network topology¶

Fuel supports two-network configuration where one network is dedicated for PXE traffic and another network for all other traffic.

To configure a two-network topology:

1. Create a new network for all non-PXE traffic:

   # fuel network-group --create --name everything --cidr <cidr>
   --gateway <gateway> --nodegroup <nodegroup>
   

2. Set the render_addr_mask parameter to internal for this network by typing:

   # fuel network-group --set --network 39 --meta '{"name":
   "everything", "notation": "cidr", "render_type": null, "map_priority": 2,
   "configurable": true, "use_gateway": true, "render_addr_mask":
   "internal", "vlan_start": null, "cidr": "10.108.31.0/24"}'
   

   This parameter is required by the Fuel library. The Fuel library requires a value called internal_address for each node. This value is set to the node’s IP address from a network group which has render_addr_mask set to internal in its metadata. Therefore, update render_addr_mask for this network.

3. Save network template for two networks as network_template_<env id>.yaml.

   Note

   Verify that nic_mapping matches your configuration.

4. Upload the network template by typing:

   # fuel network-template --upload --env <env id>
   

5. Deploy the environment.

6. After Fuel completes the deployment, verify that only one bridge is configured by typing:

   # ip -4 a
   

   Example of system output:

   1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
   default
   inet 127.0.0.1/8 scope host lo
   valid_lft forever preferred_lft forever
   8: br-fw-admin: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
   state UP group default
   inet 10.108.5.3/24 brd 10.108.5.255 scope global br-fw-admin
   valid_lft forever preferred_lft forever
   16: vr-host-base: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
   pfifo_fast state UP group default qlen 1000
   inet 240.0.0.5/30 scope global vr-host-base
   valid_lft forever preferred_lft forever
   30: hapr-host: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
   state UP group default qlen 1000
   inet 240.0.0.1/30 scope global hapr-host
   valid_lft forever preferred_lft forever