Error getting ConfigMap kube-system:kube-dns err: configmaps “kube-dns“ not found

概述问题：dns不通[root@k8s-master~]#kubectlexec-itbusyboxxsh/#nslookupnginxServer:10.254.230.254Address1:10.254.230.254nslookup:can'tresolve'nginx'/#cat/etcesolv.confsearchdefault.svc.cluster.localsvc.cluster.local

问题：
dns不通

[root@k8s-master ~]# kubectl exec -it busyBoxx sh/ # nslookup NginxServer:    10.254.230.254Address 1: 10.254.230.254nslookup: can't resolve 'Nginx'/ # cat /etc/resolv.conf search default.svc.cluster.local svc.cluster.local cluster.localnameserver 10.254.230.254nameserver 8.8.8.8options ndots:5

查看pod日志

[root@k8s-master ~]# kubectl logs -f kube-dns-3204099596-x7vdj -c kubedns -n kube-systemI0613 20:15:12.651122       1 dns.go:42] version: v1.6.0-Alpha.0.680+3872cb93abf948-dirtyI0613 20:15:12.651262       1 server.go:107] Using http://192.168.150.61:8080 for kubernetes master, kubernetes API: v1I0613 20:15:12.651550       1 server.go:68] Using configuration read from ConfigMap: kube-system:kube-dnsI0613 20:15:12.651599       1 server.go:113] FLAG: --alsologtostderr="false"I0613 20:15:12.651613       1 server.go:113] FLAG: --config-map="kube-dns"I0613 20:15:12.651620       1 server.go:113] FLAG: --config-map-namespace="kube-system"I0613 20:15:12.651626       1 server.go:113] FLAG: --dns-bind-address="0.0.0.0"I0613 20:15:12.651630       1 server.go:113] FLAG: --dns-port="10053"I0613 20:15:12.651637       1 server.go:113] FLAG: --domain="cluster.local."I0613 20:15:12.651645       1 server.go:113] FLAG: --federations=""I0613 20:15:12.651651       1 server.go:113] FLAG: --healthz-port="8081"I0613 20:15:12.651656       1 server.go:113] FLAG: --kube-master-url="http://192.168.150.61:8080"I0613 20:15:12.651662       1 server.go:113] FLAG: --kubecfg-file=""I0613 20:15:12.651666       1 server.go:113] FLAG: --log-backtrace-at=":0"I0613 20:15:12.651673       1 server.go:113] FLAG: --log-dir=""I0613 20:15:12.651679       1 server.go:113] FLAG: --log-flush-frequency="5s"I0613 20:15:12.651685       1 server.go:113] FLAG: --logtostderr="true"I0613 20:15:12.651691       1 server.go:113] FLAG: --stderrthreshold="2"I0613 20:15:12.651695       1 server.go:113] FLAG: --v="0"I0613 20:15:12.651700       1 server.go:113] FLAG: --version="false"I0613 20:15:12.651707       1 server.go:113] FLAG: --vmodule=""I0613 20:15:12.651756       1 server.go:155] Starting SkyDNS server (0.0.0.0:10053)I0613 20:15:12.666762       1 server.go:165] Skydns metrics enabled (/metrics:10055)I0613 20:15:12.669465       1 logs.go:41] skydns: ready for querIEs on cluster.local. for tcp://0.0.0.0:10053 [rcache 0]I0613 20:15:12.669518       1 logs.go:41] skydns: ready for querIEs on cluster.local. for udp://0.0.0.0:10053 [rcache 0]E0613 20:15:12.679738       1 sync.go:105] Error getting ConfigMap kube-system:kube-dns err: configmaps "kube-dns" not foundE0613 20:15:12.679763       1 dns.go:190] Error getting initial ConfigMap: configmaps "kube-dns" not found, starting with default valuesI0613 20:15:12.684971       1 server.go:126] Setting up Healthz Handler (/readiness)I0613 20:15:12.685000       1 server.go:131] Setting up cache handler (/cache)I0613 20:15:12.685007       1 server.go:120] Status http port 8081

解决：

[root@k8s-master ~]# cat kube-dns-cm.yml APIVersion: v1kind: ConfigMapMetadata:  name: kube-dns  namespace: kube-systemdata:  upstreamnameservers: |     ["1.2.3.4"]

kubectl create -f kube-dns-cm.yml 

重启kube.

[root@k8s-master ~]# kubectl get deploy,po,svc,cm,ep -n kube-systemname              DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGEdeploy/kube-dns   1         1         1            1           33mname                           READY     STATUS    RESTARTS   AGEpo/kube-dns-3204099596-n2w84   4/4       UnkNown   0          33mpo/kube-dns-3204099596-x7vdj   4/4       Running   0          23mname           CLUSTER-IP       EXTERNAL-IP   PORT(S)         AGEsvc/kube-dns   10.254.230.254   <none>        53/UDP,53/TCP   31mname          DATA      AGEcm/kube-dns   1         13mname                         ENDPOINTS                   AGEep/kube-controller-manager   <none>                      25mep/kube-dns                  10.0.55.7:53,10.0.55.7:53   31mep/kube-scheduler            <none>                      25m

再次 nslookup

[root@k8s-master ~]# kubectl exec -it busyBoxx sh/ # nslookup kubernetesServer:    10.254.230.254Address 1: 10.254.230.254 kube-dns.kube-system.svc.cluster.localname:      kubernetesAddress 1: 10.254.0.1 kubernetes.default.svc.cluster.local/ # nslookup NginxServer:    10.254.230.254Address 1: 10.254.230.254 kube-dns.kube-system.svc.cluster.localname:      NginxAddress 1: 10.254.213.70 Nginx.default.svc.cluster.local

参考
https://cloud.tencent.com/developer/article/1649590
https://www.thinBUG.com/q/43240135

总结

以上是内存溢出为你收集整理的Error getting ConfigMap kube-system:kube-dns err: configmaps “kube-dns“ not found全部内容，希望文章能够帮你解决Error getting ConfigMap kube-system:kube-dns err: configmaps “kube-dns“ not found所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。