编辑coredns的配置文件

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kubectl edit configmap coredns -n kube-system

增加解析

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hosts {
        127.0.0.1 nacos.com
        fallthrough
        }

以下为示例

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apiVersion: v1
kind: ConfigMap
metadata:
  name: coredns
  namespace: kube-system
  selfLink: /api/v1/namespaces/kube-system/configmaps/coredns
  uid: afe82210-48ab-4e74-a190-7d401a8af49a
  resourceVersion: '240420099'
  creationTimestamp: '2022-09-29T03:44:33Z'
  annotations:
    forward_config: ''
data:
  Corefile: |-
    .:53 {
        errors
        health
        ready
        hosts {
        127.0.0.1 nacos.com
        fallthrough
        }
        kubernetes cluster.local in-addr.arpa ip6.arpa {
           pods insecure
           upstream
           fallthrough in-addr.arpa ip6.arpa
           ttl 30
        }      
       prometheus :9153
        log . {
            class all
        }
        cache 30
        loop
        reload
        loadbalance
        forward . /etc/resolv.conf
    }