错误日志：
2021-09-26 22:26:28 [ ERROR ] [ xxx-xxx-xxx ] [ -1 ] [ default ] [ 10.130.8.51:8080 ] [ sky:TID:N/A; ] [ redisson-netty-1-6 ] [ DNSMonitor.java:110 ] [ operationComplete ] [ - ] [ - ] [ - ] - Unable to resolve redis-xxx-dcs-njgv.dcs.huaweicloud.com io.netty.resolver.dns.DnsResolveContext$SearchDomainUnknownHostException: Search domain query failed. Original hostname: 'redis-xxx-dcs-njgv.dcs.huaweicloud.com' failed to resolve 'redis-xxx-dcs-njgv.dcs.huaweicloud.com.openstacklocal' after 2 queries at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1013) at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:966) at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:414) at io.netty.resolver.dns.DnsResolveContext.access$600(DnsResolveContext.java:63) at io.netty.resolver.dns.DnsResolveContext$2.operationComplete(DnsResolveContext.java:463) at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609) at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117) at io.netty.resolver.dns.DnsQueryContext.tryFailure(DnsQueryContext.java:225) at io.netty.resolver.dns.DnsQueryContext$4.run(DnsQueryContext.java:177) at io.netty.util.concurrent.PromiseTask.runTask(PromiseTask.java:98) at io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:170) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748) Caused by: io.netty.resolver.dns.DnsNameResolverTimeoutException: [/1.1.1.1:53] query via UDP timed out after 2000 milliseconds (no stack trace available)
相关资料：
- https://github.com/netty/netty/issues/8880
- https://github.com/redisson/redisson/issues/1693
- https://github.com/redisson/redisson/issues/1693
- https://github.com/netty/netty/issues/8261
- https://github.com/redisson/redisson/issues/1625
- https://github.com/kubernetes/kubernetes/issues/56903
- https://www.cnblogs.com/dhcn/p/11224360.html
- https://kubernetes.io/zh/docs/concepts/services-networking/dns-pod-service/
- https://www.jianshu.com/p/9b34ee879bcb
