openstack-ansible/doc/source/reference/configuration/extra-networks.rst

Adding extra network to container

In some cases it may be useful to have an ability to add extra network interface for some container group (or just a single container). As an example this can be used for applying known fixed IP address from another network for Designate service. We will show futher configuration based on this example. Let's assume, that this network is 10.0.20.0/24 which is reachable through br-dns interface.

To add new interface with that network into dessignate containers, we need to do several actions in openstack_user_config.yml.

Note

You may find detailed example of openstack_user_config.yml configuration in section openstack-user-config-reference.

• Add this network in cidr_networks:

  cidr_networks:
    container: 172.29.236.0/22
    tunnel: 172.29.240.0/22
    storage: 172.29.244.0/22
    designate: 10.0.20.0/24

• Describe network in provider_networks:

  global_overrides:
    provider_networks:
      - network:
        container_bridge: "br-dns"
        container_type: "veth"
        container_interface: "eth5"
        ip_from_q: "designate"
        type: "veth"
        group_binds:
          - dnsaas_hosts

• Define override for containers

  Note

  Adding gateway key will create default route inside container through it

  dnsaas_hosts:
    aio1:
      ip: 172.29.236.100
      container_vars:
        container_extra_networks:
          dns_address:
            bridge: br-dns
            interface: eth5
            address: 10.0.20.100
            netmask: 255.255.255.0
            gateway: 10.0.20.1