Controller node

Controller node

Configure network interfaces

  1. Configure the first interface as the management interface:

    IP address:

    Network mask: (or /24)

    Default gateway:

  2. The provider interface uses a special configuration without an IP address assigned to it. Configure the second interface as the provider interface:

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

    • Edit the /etc/network/interfaces file to contain the following:

      # The provider network interface
      iface INTERFACE_NAME inet manual
      up ip link set dev $IFACE up
      down ip link set dev $IFACE down
  3. Reboot the system to activate the changes.

Configure name resolution

  1. Set the hostname of the node to controller.

  2. Edit the /etc/hosts file to contain the following:

    # controller       controller
    # compute1       compute1
    # block1       block1
    # object1       object1
    # object2       object2


    Some distributions add an extraneous entry in the /etc/hosts file that resolves the actual hostname to another loopback IP address such as You must comment out or remove this entry to prevent name resolution problems. Do not remove the entry.


    To reduce complexity of this guide, we add host entries for optional services regardless of whether you choose to deploy them.

Creative Commons Attribution 3.0 License

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.