hanqingwu commented on issue #11336:
URL: https://github.com/apache/apisix/issues/11336#issuecomment-2159707563

   k8s pod use coredns for dns resolve,  so you should check how to set 
hostsname in coredns ,  like below: 
   
   ```
   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: coredns
     namespace: kube-system
     labels:
         addonmanager.kubernetes.io/mode: EnsureExists
   data:
     Corefile: |
       .:53 {
           errors
           health
           kubernetes cluster.local. in-addr.arpa ip6.arpa {
               pods insecure
               upstream
               fallthrough in-addr.arpa ip6.arpa
           }
           hosts {
               127.3.4.1 aaa.dev.com 
               fallthrough
           }
            
           prometheus :9153
           proxy . /etc/resolv.conf
           cache 30
           loop
           reload
           loadbalance
       }
   ```
   


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