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

# yum install openstack-nova-network openstack-nova-api

To configure legacy networking

Run the following commands:

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

# openstack-config --set /etc/nova/nova.conf DEFAULT \
  network_api_class nova.network.api.API
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  security_group_api nova
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  network_manager nova.network.manager.FlatDHCPManager
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  firewall_driver nova.virt.libvirt.firewall.IptablesFirewallDriver
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  network_size 254
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  allow_same_net_traffic False
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  multi_host True
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  send_arp_for_ha True
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  share_dhcp_address True
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  force_dhcp_release True
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  flat_network_bridge br100
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  flat_interface INTERFACE_NAME
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  public_interface INTERFACE_NAME

Start the services and configure them to start when the system boots:

# service openstack-nova-network start
# service openstack-nova-metadata-api start
# chkconfig openstack-nova-network on
# chkconfig openstack-nova-metadata-api on

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