CoreDNSを構築する

ファイル構造

• docker-compose.yml
• Dockerfile
• volumes
  • config
    • Corefile
    • hosts

docker-compose.yml

version: '3.1'
services:
  coredns:
    build: .
    container_name: coredns
    restart: always
    expose:
      - '53'
      - '53/udp'
    ports:
      - '53:53'
      - '53:53/udp'
    volumes:
      - './volumes/config:/etc/coredns'

Dockerfile

FROM coredns/coredns:1.7.0

EXPOSE 53
EXPOSE 53/udp

ADD volumes/config/ /etc/coredns/

ENTRYPOINT ["/coredns"]
CMD ["-conf", "/etc/coredns/Corefile"]

Corefile

. {
    whoami
    forward . 172.24.2.51:53
    errors
    log . "{proto} {remote} is Request: {name} {type} {>id}"
    hosts /etc/coredns/hosts {
        fallthrough
    }
    reload
}

hosts

172.24.20.25 kakocloud.tmcit.sho