标签:node Kubernetes system 114.114 Running 报错 kube calico
【背景】
今天测试K8s集群的node节点扩容,扩容的整个过程都很顺利,但是后来发现在新扩容的node节点(k8s-node04)上,一直有一个calico-node的pod实例报错、不断重启。
【现象】
从下面的pod实例的运行状态查询结果来看,可以发现有一个pod实例(calico-node-xl9bc)在不断的重启。
[root@k8s-master01 ~]# kubectl get pods -A| grep calico
kube-system calico-kube-controllers-78d6f96c7b-tv2g6 1/1 Running 0 75m
kube-system calico-node-6dk7g 1/1 Running 0 75m
kube-system calico-node-dlf26 1/1 Running 0 75m
kube-system calico-node-s5phd 1/1 Running 0 75m
kube-system calico-node-xl9bc 0/1 Running 30 3m28s
【排查】
查询pod的日志
[root@k8s-master01 ~]# kubectl logs calico-node-xl9bc -n kube-system -f
-----省略部分日志----------------
2021-09-04 12:32:45.011 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:46.025 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:47.038 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:48.050 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:49.061 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:50.072 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:51.079 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:52.093 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:53.104 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:54.114 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:55.127 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:56.138 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:57.148 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:58.162 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:32:59.176 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:33:00.186 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:33:01.199 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:33:02.211 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:33:03.225 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
2021-09-04 12:33:04.238 [ERROR][69] felix/health.go 246: Health endpoint failed, trying to restart it... error=listen tcp: lookup localhost on 114.114.114.114:53: no such host
这个报错在网上搜寻了很久,基本也没发现有针对性的解决方案。
后来根据报错信息,在网上的一篇文章中发现了一个一模一样的报错案例,案例的原因是因为/etc/hosts文件中缺少了两行ipv4和ipv6的回环地址,回头来查看我本地node节点的/etc/hosts文件,竟然真的没有这两行,不知道昨晚我自己装这台虚拟机的时候,到底做了什么诡异的操作。
### /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
在k8s-node04的/etc/hosts文件中增加了这两行配置以后,重启网络,发现pod实例出现CrashLoopBackOff。
[root@k8s-master01 ~]# kubectl get pods -A| grep calico
kube-system calico-kube-controllers-78d6f96c7b-tv2g6 1/1 Running 0 80m
kube-system calico-node-6dk7g 1/1 Running 0 80m
kube-system calico-node-dlf26 1/1 Running 0 80m
kube-system calico-node-s5phd 1/1 Running 0 80m
kube-system calico-node-xl9bc 0/1 CrashLoopBackOff 7 8m24s
删除这个pod实例,发现重新创建的pod实例的运行状态终于恢复正常了。
[root@k8s-master01 ~]# kubectl delete pod calico-node-xl9bc -n kube-system
pod "calico-node-xl9bc" deleted
[root@k8s-master01 ~]# kubectl get pods -A| grep calico
kube-system calico-kube-controllers-78d6f96c7b-tv2g6 1/1 Running 0 81m
kube-system calico-node-6dk7g 1/1 Running 0 81m
kube-system calico-node-dlf26 1/1 Running 0 81m
kube-system calico-node-mz58r 0/1 Running 0 5s
kube-system calico-node-s5phd 1/1 Running 0 81m
[root@k8s-master01 ~]# kubectl get pods -A| grep calico
kube-system calico-kube-controllers-78d6f96c7b-tv2g6 1/1 Running 0 81m
kube-system calico-node-6dk7g 1/1 Running 0 81m
kube-system calico-node-dlf26 1/1 Running 0 81m
kube-system calico-node-mz58r 0/1 Running 0 7s
kube-system calico-node-s5phd 1/1 Running 0 81m
[root@k8s-master01 ~]# kubectl get pods -A| grep calico
kube-system calico-kube-controllers-78d6f96c7b-tv2g6 1/1 Running 0 81m
kube-system calico-node-6dk7g 1/1 Running 0 81m
kube-system calico-node-dlf26 1/1 Running 0 81m
kube-system calico-node-mz58r 0/1 Running 0 8s
kube-system calico-node-s5phd 1/1 Running 0 81m
[root@k8s-master01 ~]# kubectl get pods -A| grep calico
kube-system calico-kube-controllers-78d6f96c7b-tv2g6 1/1 Running 0 81m
kube-system calico-node-6dk7g 1/1 Running 0 81m
kube-system calico-node-dlf26 1/1 Running 0 81m
kube-system calico-node-mz58r 1/1 Running 0 11s
kube-system calico-node-s5phd 1/1 Running 0 81m
参考:
http://www.manongjc.com/detail/15-tufllpwnqavcxef.html
https://www.lmonkey.com/t/DExg407BK
标签:node,Kubernetes,system,114.114,Running,报错,kube,calico 来源: https://blog.csdn.net/cnskylee/article/details/120105446
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。