我在GCP中使用Kesley KTHW（https://github.com/kelseyhightower/kubernetes-the-hard-way/）创建了k8集群。

试图在这个链接上做一些练习=

版本：

sshanmugagani@MSI:~/cka/skk8/practise-1$ kubectl version Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.6", GitCommit:"dff82dc0de47299ab66c83c626e08b245ab19037", GitTreeState:"clean", BuildDate:"2020-07-15T16:58:53Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"} Server Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.6", GitCommit:"dff82dc0de47299ab66c83c626e08b245ab19037", GitTreeState:"clean", BuildDate:"2020-07-15T16:51:04Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}

Pod无法解析google.com：

sshanmugagani@MSI:~/cka/skk8/practise-1$ kubectl exec -ti dnsutils -- nslookup google
Server: 10.32.0.10
Address: 10.32.0.10#53

** server can't find google.us-west1-c.c.test.internal: SERVFAIL

command terminated with exit code 1

豆荚的 /etc/resolv.conf：

sshanmugagani@MSI:~/cka/skk8/practise-1$ kubectl apply -f https://k8s.io/examples/admin/dns/dnsutils.yaml pod/dnsutils created 

sshanmugagani@MSI：~/cka/skk8/实践-1$k exec-it dnsutils--cat /etc/resolv.confsearch default. svc.club.local svc.club.local us-ester1-c.c.test.内部c.test.内部google.内部名称服务器10.32.0.10选项ndots：5

获取pod运行的工作节点：

sshanmugagani@MSI:~/cka/skk8/practise-1$ kgp -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES dnsutils 1/1 Running 0 60s 10.200.0.65 worker-0 <none> <none> multi 0/2 Completed 0 12h 10.200.0.53 worker-0 <none> <none>

Worker节点解析：

sshanmugagani@worker-0:~$ nslookup google.com
Server: 127.0.0.53
Address: 127.0.0.53#53

Non-authoritative answer:
Name: google.com
Address: 74.125.20.101
Name: google.com
Address: 74.125.20.100
Name: google.com
Address: 74.125.20.139
Name: google.com
Address: 74.125.20.138
Name: google.com
Address: 74.125.20.113
Name: google.com
Address: 74.125.20.102
Name: google.com
Address: 2607:f8b0:400e:c09::65
Name: google.com
Address: 2607:f8b0:400e:c09::8a
Name: google.com
Address: 2607:f8b0:400e:c09::8b
Name: google.com
Address: 2607:f8b0:400e:c09::71

Coredns：

sshanmugagani@MSI:~/cka/skk8/practise-1$ kgp $ks NAME READY STATUS RESTARTS AGE coredns-5677dc4cdb-cfl2j 1/1 Running 1 11h coredns-5677dc4cdb-xqm44 1/1 Running 1 11h

Coredns日志：

sshanmugagani@MSI:~/cka/skk8/practise-1$ kubectl logs coredns-5677dc4cdb-cfl2j $ks .:53 [INFO] plugin/reload: Running configuration MD5 = fbb756dad13bce75afc40db627b38529 CoreDNS-1.7.0 linux/amd64, go1.14.4, f59c03d [ERROR] plugin/errors: 2 2953017454530458158.338294255644342916. HINFO: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 google.com.us-west1-c.c.test.internal. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 google.com. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 google.com. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 kube-dns. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.us-west1-c.c.test.internal. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.c.test.internal. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.c.test.internal. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.goo. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.us-west1-c.c.test.internal. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.c.test.internal. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.goo. AAAA: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.goo. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.us-west1-c.c.test.internal. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.c.test.internal. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.goo. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 neverssl.com.us-west1-c.c.test.internal. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 google.com. A: plugin/loop: no next plugin found [ERROR] plugin/errors: 2 google. A: plugin/loop: no next plugin found