我尝试基于 ansible repo 设置一个 kubernetes dns 插件： https ://github.com/kubernetes/contrib/tree/master/ansible/roles/kubernetes-addons
运行 playbook 后，我既找不到 dns pod 也找不到服务。！！在做了一些讲座之后，（https://github.com/kubernetes/contrib/issues/886#issuecomment-216741889）看来我需要手动运行 rc.yml 和 svc.yml 。这就是我所做的。
不幸的是，dns pod 和服务仍然运行了一段时间，然后突然终止。
我试图在 pod 关闭之前检查一些日志：
etcd 日志
# kubectl logs kube-dns-v8-ujfqn --namespace=kube-system -c etcd
2016/11/21 13:05:04 etcd: listening for peers on http://localhost:2380
2016/11/21 13:05:04 etcd: listening for peers on http://localhost:7001
2016/11/21 13:05:04 etcd: listening for client requests on http://127.0.0.1:2379
2016/11/21 13:05:04 etcd: listening for client requests on http://127.0.0.1:4001
2016/11/21 13:05:04 etcdserver: datadir is valid for the 2.0.1 format
2016/11/21 13:05:04 etcdserver: name = default
2016/11/21 13:05:04 etcdserver: data dir = /var/etcd/data
2016/11/21 13:05:04 etcdserver: member dir = /var/etcd/data/member
2016/11/21 13:05:04 etcdserver: heartbeat = 100ms
2016/11/21 13:05:04 etcdserver: election = 1000ms
2016/11/21 13:05:04 etcdserver: snapshot count = 10000
2016/11/21 13:05:04 etcdserver: advertise client URLs = http://127.0.0.1:2379,http://127.0.0.1:4001
2016/11/21 13:05:04 etcdserver: initial advertise peer URLs = http://localhost:2380,http://localhost:7001
2016/11/21 13:05:04 etcdserver: initial cluster = default=http://localhost:2380,default=http://localhost:7001
2016/11/21 13:05:04 etcdserver: start member 6a5871dbdd12c17c in cluster f68652439e3f8f2a
2016/11/21 13:05:04 raft: 6a5871dbdd12c17c became follower at term 0
2016/11/21 13:05:04 raft: newRaft 6a5871dbdd12c17c [peers: [], term: 0, commit: 0, applied: 0, lastindex: 0, lastterm: 0]
2016/11/21 13:05:04 raft: 6a5871dbdd12c17c became follower at term 1
2016/11/21 13:05:04 etcdserver: added local member 6a5871dbdd12c17c [http://localhost:2380 http://localhost:7001] to cluster f68652439e3f8f2a
2016/11/21 13:05:06 raft: 6a5871dbdd12c17c is starting a new election at term 1
2016/11/21 13:05:06 raft: 6a5871dbdd12c17c became candidate at term 2
2016/11/21 13:05:06 raft: 6a5871dbdd12c17c received vote from 6a5871dbdd12c17c at term 2
2016/11/21 13:05:06 raft: 6a5871dbdd12c17c became leader at term 2
2016/11/21 13:05:06 raft.node: 6a5871dbdd12c17c elected leader 6a5871dbdd12c17c at term 2
2016/11/21 13:05:06 etcdserver: published {Name:default ClientURLs:[http://127.0.0.1:2379 http://127.0.0.1:4001]} to cluster f68652439e3f8f2a
天空DNS日志
# kubectl logs kube-dns-v8-ujfqn --namespace=kube-system -c skydns
2016/11/21 13:07:14 skydns: falling back to default configuration, could not read from etcd: 100: Key not found (/skydns/config) [10]
2016/11/21 13:07:14 skydns: ready for queries on cluster.local. for tcp://0.0.0.0:53 [rcache 0]
2016/11/21 13:07:14 skydns: ready for queries on cluster.local. for udp://0.0.0.0:53 [rcache 0]
健康日志
#kubectl logs kube-dns-v8-ujfqn --namespace=kube-system -c healthz
2016/11/21 13:05:58 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:05:59 Client ip 12.16.64.1:45631 requesting /healthz probe servicing cmd nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:00 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:02 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:04 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:06 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:08 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:08 Client ip 12.16.64.1:45652 requesting /healthz probe servicing cmd nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:10 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:12 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:14 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:16 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:18 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:18 Client ip 12.16.64.1:45673 requesting /healthz probe servicing cmd nslookup kubernetes.default.svc.cluster.local localhost >/dev/null2016/11/21 13:06:20 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:22 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:24 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:26 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:28 Worker running nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
2016/11/21 13:06:28 Client ip 12.16.64.1:45693 requesting /healthz probe servicing cmd nslookup kubernetes.default.svc.cluster.local localhost >/dev/null
kube2sky 日志
Nov 23 10:09:26 ctc-cicd2 docker-current[25416]: I1123 07:09:26.213227 1 kube2sky.go:529] Using https://10.254.0.1:443 for kubernetes master
Nov 23 10:09:26 ctc-cicd2 docker-current[25416]: I1123 07:09:26.213279 1 kube2sky.go:530] Using kubernetes API <nil>
Nov 23 10:09:26 ctc-cicd2 docker-current[25416]: I1123 07:09:26.214181 1 kube2sky.go:598] Waiting for service: default/kubernetes
Nov 23 10:09:26 ctc-cicd2 docker-current[25416]: 2016/11/23 07:09:26 Worker running nslookup kubernetes.default.svc.cluster.local 127.0.0.1 >/dev/null
Nov 23 10:09:26 ctc-cicd2 docker-current[25416]: I1123 07:09:26.508032 1 kube2sky.go:660] Successfully added DNS record for Kubernetes service.
做错了什么？？