问题描述
我在ubuntu 16.04中安装了Kubernetes版本1.16.11，并为CNI网络进行了编织。我有与同一群集中的服务进行通信的Web应用程序。 Web应用程序第一次显示结果，之后不再显示，并且对服务的请求处于待处理状态。在Pod中运行的应用程序响应速度非常慢或超时。我怀疑这是因为coredns。我可以看到coredns pod经常崩溃。在我访问Web应用程序之前，有线广告连播的就绪状态为1/1，但几秒钟后变为0/1，然后状态变为CrashLoopBackOff。
以下是coredns窗格之一中的事件
以下是在coredns中发生的活动（pod日志），然后才停止活动
.:53
2020-08-19T05:41:42.572Z [INFO] plugin/reload: Running configuration MD5 = ed017d072d4dd28f5c79c00674bf5857
2020-08-19T05:41:42.572Z [INFO] coredns-1.6.2
2020-08-19T05:41:42.572Z [INFO] linux/amd64,go1.12.8,795a3eb
coredns-1.6.2
linux/amd64,795a3eb
2020-08-19T05:41:42.600Z [INFO] 127.0.0.1:46832 - 49906 "HINFO IN 7243822456926758847.6833987984127310077. udp 57 false 512" NXDOMAIN qr,rd,ra 132 0.028488974s
2020-08-19T05:53:01.623Z [INFO] 10.47.0.0:30093 - 50722 "A IN checkpoint-api.weave.works.kube-system.svc.cluster.local. udp 74 false 512" NXDOMAIN qr,aa,rd 167 0.000213433s
2020-08-19T05:53:01.624Z [INFO] 10.47.0.0:57021 - 58779 "AAAA IN checkpoint-api.weave.works.kube-system.svc.cluster.local. udp 74 false 512" NXDOMAIN qr,rd 167 0.000202274s
2020-08-19T05:53:01.626Z [INFO] 10.47.0.0:31645 - 42289 "A IN checkpoint-api.weave.works.svc.cluster.local. udp 62 false 512" NXDOMAIN qr,rd 155 0.000118395s
2020-08-19T05:53:01.629Z [INFO] 10.47.0.0:61413 - 46930 "AAAA IN checkpoint-api.weave.works.cluster.local. udp 58 false 512" NXDOMAIN qr,rd 151 0.000121312s
2020-08-19T05:53:01.632Z [INFO] 10.47.0.0:19447 - 15534 "AAAA IN checkpoint-api.weave.works.ec2.internal. udp 57 false 512" NXDOMAIN qr,ra 57 0.001751403s
2020-08-19T05:53:01.632Z [INFO] 10.47.0.0:9886 - 17303 "A IN checkpoint-api.weave.works.ec2.internal. udp 57 false 512" NXDOMAIN qr,ra 57 0.001958423s
2020-08-19T05:57:15.091Z [INFO] 10.32.0.1:53297 - 34003 "A IN api-service.default.svc.cluster.local. udp 59 false 512" NOERROR qr,rd 116 0.000157001s
2020-08-19T05:57:15.097Z [INFO] 10.32.0.1:30306 - 62967 "A IN api-service.default.svc.cluster.local. udp 59 false 512" NOERROR qr,rd 116 0.00008247s
2020-08-19T05:57:17.592Z [INFO] 10.32.0.1:53297 - 34003 "A IN api-service.default.svc.cluster.local. udp 59 false 512" NOERROR qr,rd 116 0.000118957s
2020-08-19T05:57:17.594Z [INFO] 10.32.0.1:28474 - 9972 "A IN api-service.default.svc.cluster.local. udp 59 false 512" NOERROR qr,rd 116 0.000095925s
2020-08-19T05:57:17.595Z [INFO] 10.32.0.1:16322 - 49891 "A IN api-service.default.svc.cluster.local. udp 59 false 512" NOERROR qr,rd 116 0.000141925s
2020-08-19T05:57:17.599Z [INFO] 10.32.0.1:30306 - 62967 "A IN api-service.default.svc.cluster.local. udp 59 false 512" NOERROR qr,rd 116 0.000080882s
[INFO] SIGTERM: Shutting down servers then terminating
崩溃后登录pod并尝试重新启动
2020-08-18T19:16:21.806Z [INFO] plugin/reload: Running configuration MD5 = f64cb9b977c7dfca58c4fab108535a76
2020-08-18T19:16:21.806Z [INFO] coredns-1.6.2
2020-08-18T19:16:21.806Z [INFO] linux/amd64,795a3eb
2020-08-18T19:16:27.807Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:60178->10.99.0.2:53: I/O timeout
2020-08-18T19:16:30.808Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:53454->10.99.0.2:53: I/O timeout
2020-08-18T19:16:31.808Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:57946->10.99.0.2:53: I/O timeout
2020-08-18T19:16:32.808Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:56865->10.99.0.2:53: I/O timeout
2020-08-18T19:16:35.808Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:59673->10.99.0.2:53: I/O timeout
2020-08-18T19:16:38.809Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:34594->10.99.0.2:53: I/O timeout
2020-08-18T19:16:41.809Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:55874->10.99.0.2:53: I/O timeout
2020-08-18T19:16:44.810Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:52003->10.99.0.2:53: I/O timeout
2020-08-18T19:16:47.810Z [ERROR] plugin/errors: 2 1971409473292337290.6469642637242929399. HINFO: read udp 10.32.0.3:41473->10.99.0.2:53: I/O timeout
[INFO] SIGTERM: Shutting down servers then terminating
能否让我知道这是造成速度缓慢/无反应的原因还是其他原因？对此有什么解决方法？
谢谢。
解决方法
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