CoreDNS

설치

• https://github.com/coredns/helm

helm repo add coredns https://coredns.github.io/helm

helm repo update coredns \
&& helm search repo coredns/coredns -l | head -n 10

helm pull coredns/coredns --version 1.29.0

helm show values coredns/coredns --version 1.29.0 > coredns-1.29.0.yaml

servers:
  - zones:
      - zone: <zone>
        # scheme: <scheme>:// # dns://, tls://, https://, grpc://
    port: <port>
    plugins:
      - name: <plugin>
        # parameters: <parameters>
        # configBlock: <config>

extraConfig: {}

affinity: {}

tolerations: []

DNS 쿼리는 가장 많이 매칭된 zone을 사용합니다. b.a와 c.b.a zone이 있을 때, d.c.b.a에 대한 쿼리가 오면 c.b.a zone이 매칭됩니다.

정보

servers 설정은 아래와 같은 형식으로 변환됩니다.

/etc/coredns/Corefile

[<scheme>]<zone>[ [<scheme>]<zone>][:<port>] {
    # Server block

    <plugin> [<parameters>] [{
        # Plugin block
        <config>
    }]
}

helm template coredns coredns-1.29.0.tgz \
  -f coredns-1.29.0.yaml \
  > coredns.yaml

helm upgrade coredns coredns-1.29.0.tgz \
  --install \
  --history-max 5 \
  -f coredns-1.29.0.yaml