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.

Bemerkung

You may find detailed example of openstack_user_config.yml configuration in section openstack_user_config Einstellungsreferenz.

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

Bemerkung

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

Adding extra network to container

Adding extra network to container¶

openstack-ansible