DNS service¶

Mirantis OpenStack for Kubernetes (MOSK) provides DNS records managing capability through the DNS service (OpenStack Designate).

LoadBalancer type for PowerDNS¶

The supported back end for Designate is PowerDNS. If required, you can specify whether to use an external IP address or UDP, TCP, or TCP + UDP kind of Kubernetes for the PowerDNS service.

To configure LoadBalancer for PowerDNS, use the spec:features:designate definition in the OpenStackDeployment custom resource.

The list of supported options includes:

external_ip - Optional. An IP address for the LoadBalancer service. If not defined, LoadBalancer allocates the IP address.
protocol - A protocol for the Designate back end in Kubernetes. Can only be udp, tcp, or tcp+udp.
type - The type of the back end for Designate. Can only be powerdns.

For example:

spec:
  features:
    designate:
      backend:
        external_ip: 10.172.1.101
        protocol: udp
        type: powerdns

DNS service known limitations¶

Inability to set up a secondary DNS zone¶

Due to an issue in the dnspython library, Asynchronous Transfer Full Range (AXFR) requests do not work and cause inability to set up a secondary DNS zone. The issue affects OpenStack Victoria and will be fixed in the Yoga release.