Configure compute node

This section covers deployment of a simple flat network that provides IP addresses to your instances via DHCP. If your environment includes multiple compute nodes, the multi-host feature provides redundancy by spreading network functions across compute nodes.

To install legacy networking components

# apt-get install nova-network nova-api-metadata

To configure legacy networking

Edit the /etc/nova/nova.conf file and add the following keys to the [DEFAULT] section:

Replace INTERFACE_NAME with the actual interface name for the external network. For example, eth1 or ens224.

[DEFAULT]
...
network_api_class = nova.network.api.API
security_group_api = nova
firewall_driver = nova.virt.libvirt.firewall.IptablesFirewallDriver
network_manager = nova.network.manager.FlatDHCPManager
network_size = 254
allow_same_net_traffic = False
multi_host = True
send_arp_for_ha = True
share_dhcp_address = True
force_dhcp_release = True
flat_network_bridge = br100
flat_interface = INTERFACE_NAME
public_interface = INTERFACE_NAME

Restart the services:

# service nova-network restart
# service nova-api-metadata restart

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