Docker Kube DNS不起作用

我设置了k8s

DNS已正确启动

$ k logs kube-dns-v17.1-qaygj -c kubedns --namespace=kube-system |head -50
I0828 04:49:14.079474       1 server.go:91] Using https://10.0.0.1:443 for kubernetes master
I0828 04:49:14.081339       1 server.go:92] Using kubernetes API <nil>
I0828 04:49:14.081923       1 server.go:132] Starting SkyDNS server. Listening on port:10053
I0828 04:49:14.082071       1 server.go:139] skydns: metrics enabled on :/metrics
I0828 04:49:14.082181       1 dns.go:166] Waiting for service: default/kubernetes
I0828 04:49:14.082462       1 logs.go:41] skydns: ready for queries on cluster.local. for tcp://0.0.0.0:10053 [rcache 0]
I0828 04:49:14.082607       1 logs.go:41] skydns: ready for queries on cluster.local. for udp://0.0.0.0:10053 [rcache 0]
I0828 04:49:14.480396       1 server.go:101] Setting up Healthz Handler(/readiness, /cache) on port :8081
I0828 04:49:14.483012       1 dns.go:660] DNS Record:&{10.0.0.1 0 10 10  false 30 0  }, hash:24c3d825
I0828 04:49:14.483065       1 dns.go:660] DNS Record:&{kubernetes.default.svc.cluster.local. 443 10 10  false 30 0  }, hash:c3f6ae26
I0828 04:49:14.483115       1 dns.go:660] DNS Record:&{kubernetes.default.svc.cluster.local. 0 10 10  false 30 0  }, hash:b9b7d845
I0828 04:49:14.483160       1 dns.go:660] DNS Record:&{10.0.0.24 0 10 10  false 30 0  }, hash:d8b58e70
I0828 04:49:14.483194       1 dns.go:660] DNS Record:&{kubernetes-dashboard.kube-system.svc.cluster.local. 0 10 10  false 30 0  }, hash:529066a8
I0828 04:49:14.483237       1 dns.go:660] DNS Record:&{10.0.0.10 0 10 10  false 30 0  }, hash:2d9aa69
I0828 04:49:14.483266       1 dns.go:660] DNS Record:&{kube-dns.kube-system.svc.cluster.local. 53 10 10  false 30 0  }, hash:fdbb4e78
I0828 04:49:14.483309       1 dns.go:660] DNS Record:&{kube-dns.kube-system.svc.cluster.local. 53 10 10  false 30 0  }, hash:fdbb4e78
I0828 04:49:14.483337       1 dns.go:660] DNS Record:&{kube-dns.kube-system.svc.cluster.local. 0 10 10  false 30 0  }, hash:d1247c4e
I0828 04:49:16.678334       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:49:16.678405       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:49:16.777991       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:49:16.778100       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:49:16.778886       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:49:46.778352       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:49:46.778406       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:49:46.778932       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:50:16.879611       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:50:16.879685       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:50:16.880274       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:50:16.880332       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:50:16.880900       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:50:46.878037       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:50:46.878094       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:50:46.978007       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:51:16.778397       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:51:16.778455       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:51:16.779062       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:51:16.779110       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:51:16.779588       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:51:46.778319       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:51:46.778374       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:51:46.779048       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:52:16.878240       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:52:16.878309       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:52:16.878848       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:52:16.878886       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:52:16.977642       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:52:46.678628       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false
I0828 04:52:46.678685       1 dns.go:539] records:[0xc820356af0], retval:[{10.0.0.1 0 10 10  false 30 0  /skydns/local/cluster/svc/default/kubernetes/3234633364383235}], path:[local cluster svc default kubernetes]
I0828 04:52:46.878096       1 dns.go:583] Received ReverseRecord Request:1.0.0.10.in-addr.arpa.
I0828 04:53:16.679056       1 dns.go:439] Received DNS Request:kubernetes.default.svc.cluster.local., exact:false

但是dns查找不起作用

留言簿信息报告

PANIC: dial tcp: lookup redis-master on 10.0.0.10:53: read udp 10.1.102.2:46755->10.0.0.10:53: i/o timeout
goroutine 277 [running]:
github.com/codegangsta/negroni.(*Recovery).ServeHTTP.func1(0x7f1d98e5ba90, 0xc820323580, 0xc8200b8ec0)
    /go/src/github.com/codegangsta/negroni/recovery.go:34 +0xe9
panic(0x7a8c60, 0xc820327ae0)

留言簿环境页

{
  "GUESTBOOK_PORT": "tcp://10.0.0.139:3000",
  "GUESTBOOK_PORT_3000_TCP": "tcp://10.0.0.139:3000",
  "GUESTBOOK_PORT_3000_TCP_ADDR": "10.0.0.139",
  "GUESTBOOK_PORT_3000_TCP_PORT": "3000",
  "GUESTBOOK_PORT_3000_TCP_PROTO": "tcp",
  "GUESTBOOK_SERVICE_HOST": "10.0.0.139",
  "GUESTBOOK_SERVICE_PORT": "3000",
  "HOME": "/",
  "HOSTNAME": "guestbook-advba",
  "KUBERNETES_PORT": "tcp://10.0.0.1:443",
  "KUBERNETES_PORT_443_TCP": "tcp://10.0.0.1:443",
  "KUBERNETES_PORT_443_TCP_ADDR": "10.0.0.1",
  "KUBERNETES_PORT_443_TCP_PORT": "443",
  "KUBERNETES_PORT_443_TCP_PROTO": "tcp",
  "KUBERNETES_SERVICE_HOST": "10.0.0.1",
  "KUBERNETES_SERVICE_PORT": "443",
  "KUBERNETES_SERVICE_PORT_HTTPS": "443",
  "MYAPP_PORT": "tcp://10.0.0.147:8765",
  "MYAPP_PORT_8765_TCP": "tcp://10.0.0.147:8765",
  "MYAPP_PORT_8765_TCP_ADDR": "10.0.0.147",
  "MYAPP_PORT_8765_TCP_PORT": "8765",
  "MYAPP_PORT_8765_TCP_PROTO": "tcp",
  "MYAPP_SERVICE_HOST": "10.0.0.147",
  "MYAPP_SERVICE_PORT": "8765",
  "PATH": "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
  "REDIS_MASTER_PORT": "tcp://10.0.0.35:6379",
  "REDIS_MASTER_PORT_6379_TCP": "tcp://10.0.0.35:6379",
  "REDIS_MASTER_PORT_6379_TCP_ADDR": "10.0.0.35",
  "REDIS_MASTER_PORT_6379_TCP_PORT": "6379",
  "REDIS_MASTER_PORT_6379_TCP_PROTO": "tcp",
  "REDIS_MASTER_SERVICE_HOST": "10.0.0.35",
  "REDIS_MASTER_SERVICE_PORT": "6379",
  "REDIS_SLAVE_PORT": "tcp://10.0.0.171:6379",
  "REDIS_SLAVE_PORT_6379_TCP": "tcp://10.0.0.171:6379",
  "REDIS_SLAVE_PORT_6379_TCP_ADDR": "10.0.0.171",
  "REDIS_SLAVE_PORT_6379_TCP_PORT": "6379",
  "REDIS_SLAVE_PORT_6379_TCP_PROTO": "tcp",
  "REDIS_SLAVE_SERVICE_HOST": "10.0.0.171",
  "REDIS_SLAVE_SERVICE_PORT": "6379"
}

我也尝试在dns pod中解析

$ k get svc --namespace=kube-system
NAME                   CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE
kube-dns               10.0.0.10    <none>        53/UDP,53/TCP   10h
kubernetes-dashboard   10.0.0.24    <none>        80/TCP          10h
$ k exec -it kube-dns-v17.1-qaygj -c kubedns --namespace=kube-system -- /bin/sh
/ # nslookup redis-master
Server:    10.143.22.118
Address 1: 10.143.22.118

nslookup: can't resolve 'redis-master'
/ # nslookup baidu.com
Server:    10.143.22.118
Address 1: 10.143.22.118

Name:      baidu.com
Address 1: 111.13.101.208
Address 2: 220.181.57.217
Address 3: 123.125.114.144
Address 4: 180.149.132.47
/ # nslookup redis-master 10.0.0.10
Server:    10.0.0.10
Address 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local

nslookup: can't resolve 'redis-master'
/ # nslookup baidu.com 10.0.0.10
Server:    10.0.0.10
Address 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local

Name:      baidu.com
Address 1: 123.125.114.144
Address 2: 180.149.132.47
Address 3: 111.13.101.208
Address 4: 220.181.57.217

$k get svc--namespace=kube系统
名称CLUSTER-IP EXTERNAL-IP端口年龄
kube dns 10.0.0.10 53/UDP，53/TCP 10h
kubernetes仪表板10.0.0.24 80/TCP 10h
$k exec-it kube-dns-v17.1-qaygj-c kubedns--namespace=kube-system--/bin/sh
/#NSIS主机
服务器：10.143.22.118
地址1:10.143.22.118
nslookup:无法解析“redis主机”
/#百度网站
服务器：10.143.22.118
地址1:10.143.22.118
名称：百度
地址1:111.13.101.208
地址2:220.181.57.217
地址3:123.125.114.144
地址4:180.149.132.47
/#NSR redis master 10.0.0.10
服务器：10.0.0.10
地址1:10.0.0.10 kube-dns.kube-system.svc.cluster.local
nslookup:无法解析“redis主机”
/#百度10.0.0.10
服务器：10.0.0.10
地址1:10.0.0.10 kube-dns.kube-system.svc.cluster.local
名称：百度
地址1:123.125.114.144
地址2:180.149.132.47
地址3:111.13.101.208
地址4:220.181.57.217

---

为什么kube dns不工作？

您能检查一下kube代理是否正常运行吗？看起来与

kube dns

服务的连接有问题

---

您可以

kubectl获取pods--namespace=kube system

和

iptables save

来检查状态。

这个问题是由ip冲突引起的，提供商使用10作为内部网络，docker multinode使用10/8作为默认集群ip范围，然后连接了一些东西

这就是我所做的

• 在容器外复制/etc/kubernetes
• 将

  /etc/kubernetes/master multi/master multi.json中的
  10.0.0.1
  替换为
  172.16.0.1

• 将

  /etc/kubernetes/master multi/addon manager.json中的
  addon
  卷更改为
  
  {
  “名称”：“插件”，
  “主机路径”：{“路径”：“/path/to/you/own/etc/kubernetes/”}
  }
  

• 将

  /etc/kubernetes/addon/skydns svc.yaml中的
  clusterIP
  更改为
  172.16.0.10
  

• 将

  common.sh

  中的所有

  --群集dns=10.0.0.10

  更改为

  --群集dns=172.16.0.10

• 将

  -v/path/to/you/own/etc/kubernetes/：/etc/kubernetes/\

  添加到

  common.sh中的KUBECTL\u挂载

• 然后

  FLANNEL\u IPMASQ=false FLANNEL\u NETWORK=172.16.0.0/16./master.sh

• 完成

我还向kube部署添加了一个问题

{
  "GUESTBOOK_PORT": "tcp://10.0.0.139:3000",
  "GUESTBOOK_PORT_3000_TCP": "tcp://10.0.0.139:3000",
  "GUESTBOOK_PORT_3000_TCP_ADDR": "10.0.0.139",
  "GUESTBOOK_PORT_3000_TCP_PORT": "3000",
  "GUESTBOOK_PORT_3000_TCP_PROTO": "tcp",
  "GUESTBOOK_SERVICE_HOST": "10.0.0.139",
  "GUESTBOOK_SERVICE_PORT": "3000",
  "HOME": "/",
  "HOSTNAME": "guestbook-advba",
  "KUBERNETES_PORT": "tcp://10.0.0.1:443",
  "KUBERNETES_PORT_443_TCP": "tcp://10.0.0.1:443",
  "KUBERNETES_PORT_443_TCP_ADDR": "10.0.0.1",
  "KUBERNETES_PORT_443_TCP_PORT": "443",
  "KUBERNETES_PORT_443_TCP_PROTO": "tcp",
  "KUBERNETES_SERVICE_HOST": "10.0.0.1",
  "KUBERNETES_SERVICE_PORT": "443",
  "KUBERNETES_SERVICE_PORT_HTTPS": "443",
  "MYAPP_PORT": "tcp://10.0.0.147:8765",
  "MYAPP_PORT_8765_TCP": "tcp://10.0.0.147:8765",
  "MYAPP_PORT_8765_TCP_ADDR": "10.0.0.147",
  "MYAPP_PORT_8765_TCP_PORT": "8765",
  "MYAPP_PORT_8765_TCP_PROTO": "tcp",
  "MYAPP_SERVICE_HOST": "10.0.0.147",
  "MYAPP_SERVICE_PORT": "8765",
  "PATH": "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
  "REDIS_MASTER_PORT": "tcp://10.0.0.35:6379",
  "REDIS_MASTER_PORT_6379_TCP": "tcp://10.0.0.35:6379",
  "REDIS_MASTER_PORT_6379_TCP_ADDR": "10.0.0.35",
  "REDIS_MASTER_PORT_6379_TCP_PORT": "6379",
  "REDIS_MASTER_PORT_6379_TCP_PROTO": "tcp",
  "REDIS_MASTER_SERVICE_HOST": "10.0.0.35",
  "REDIS_MASTER_SERVICE_PORT": "6379",
  "REDIS_SLAVE_PORT": "tcp://10.0.0.171:6379",
  "REDIS_SLAVE_PORT_6379_TCP": "tcp://10.0.0.171:6379",
  "REDIS_SLAVE_PORT_6379_TCP_ADDR": "10.0.0.171",
  "REDIS_SLAVE_PORT_6379_TCP_PORT": "6379",
  "REDIS_SLAVE_PORT_6379_TCP_PROTO": "tcp",
  "REDIS_SLAVE_SERVICE_HOST": "10.0.0.171",
  "REDIS_SLAVE_SERVICE_PORT": "6379"
}

$ k get svc --namespace=kube-system
NAME                   CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE
kube-dns               10.0.0.10    <none>        53/UDP,53/TCP   10h
kubernetes-dashboard   10.0.0.24    <none>        80/TCP          10h
$ k exec -it kube-dns-v17.1-qaygj -c kubedns --namespace=kube-system -- /bin/sh
/ # nslookup redis-master
Server:    10.143.22.118
Address 1: 10.143.22.118

nslookup: can't resolve 'redis-master'
/ # nslookup baidu.com
Server:    10.143.22.118
Address 1: 10.143.22.118

Name:      baidu.com
Address 1: 111.13.101.208
Address 2: 220.181.57.217
Address 3: 123.125.114.144
Address 4: 180.149.132.47
/ # nslookup redis-master 10.0.0.10
Server:    10.0.0.10
Address 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local

nslookup: can't resolve 'redis-master'
/ # nslookup baidu.com 10.0.0.10
Server:    10.0.0.10
Address 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local

Name:      baidu.com
Address 1: 123.125.114.144
Address 2: 180.149.132.47
Address 3: 111.13.101.208
Address 4: 220.181.57.217