在K8s部署ELK时Filebeat出现Logstash DNS解析失败问题求助

执行命令 kubectl describe pod filebeat-filebeat-rpjbg -n elk 查看Pod详情，发现就绪探针失败，错误信息如下：

Warning Unhealthy 8s (x5 over 48s) kubelet Readiness probe failed: logstash: logstash:5044...
connection...
parse host... OK
dns lookup... ERROR lookup logstash on 10.245.0.10:53: no such host

怀疑Logstash的values.yaml配置是否引发该问题，相关配置片段如下：

logstashConfig:
  logstash.yml: |
    http.host: 0.0.0.0
    xpack.monitoring.enabled: false

当前集群内Pod状态：

NAME                      READY   STATUS    RESTARTS   AGE
elasticsearch-master-0    1/1     Running   0          146m
filebeat-filebeat-rpjbg   0/1     Running   0          5m45s
filebeat-filebeat-v4fxz   0/1     Running   0          5m45s
filebeat-filebeat-zf5w7   0/1     Running   0          5m45s
logstash-logstash-0       1/1     Running   0          14m
logstash-logstash-1       1/1     Running   0          14m
logstash-logstash-2       1/1     Running   0          14m

集群内Service信息：

NAME                            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)             AGE
elasticsearch-master            ClusterIP   10.245.205.251   <none>        9200/TCP,9300/TCP   172m
elasticsearch-master-headless   ClusterIP   None             <none>        9200/TCP,9300/TCP   172m
logstash-logstash               ClusterIP   10.245.104.163   <none>        5044/TCP            16m
logstash-logstash-headless      ClusterIP   None             <none>        9600/TCP            16m

内容的提问来源于stack exchange，提问作者Breaking News