Deploy ExternalDNS for Kubernetes¶

ExternalDNS deployed on Mirantis Cloud Platform (MCP) allows you to set up a DNS management server for Kubernetes starting with version 1.7. ExternalDNS enables you to control DNS records dynamically through Kubernetes resources and make Kubernetes resources discoverable through public DNS servers. ExternalDNS synchronizes exposed Kubernetes Services and Ingresses with DNS cloud providers, such as Designate, AWS Route 53, Google CloudDNS, and CoreDNS.

ExternalDNS retrieves a list of resources from the Kubernetes API to determine the desired list of DNS records. It synchronizes the DNS service according to the current Kubernetes status.

ExternalDNS can use the following DNS backend providers:

• AWS Route 53 is a highly available and scalable cloud DNS web service. Amazon Route 53 is fully compliant with IPv6.
• Google CloudDNS is a highly available, scalable, cost-effective, and programmable DNS service running on the same infrastructure as Google.
• OpenStack Designate can use different DNS servers including Bind9 and PowerDNS that are supported by MCP.
• CoreDNS is the next generation of SkyDNS that can use etcd to accept updates to DNS entries. It functions as an on-premises open-source alternative to cloud DNS services (DNSaaS). You can deploy CoreDNS with ExternalDNS if you do not have an active DNS backend provider yet.

This section describes how to configure and set up ExternalDNS on a new or existing MCP Kubernetes-based cluster.