Exposing Docker's internal DNS with CoreDNS

theorangeone.net

Whilst Docker is a containerisation technology, it's not just about running applications - there's also networking. When you add a container to a docker network, it magically becomes discoverable by other containers on the same network with DNS. All containers use Docker's magical internal DNS server to achieve this. However, whilst Docker networks are accessible to the host (unless you set internal: true), the same isn't true for the DNS server - which is…