无法在kubernetes群集中获取Pod信息
按照“Kubernetes Cookbook”一书的说明，我创build了一个主节点和两个节点的docker集群：
master: 198.11.175.18 etcd, flannel, kube-apiserver, kube-controller-manager, kube-scheduler minion: etcd, flannel, kubelet, kube-proxy minion1: 120.27.94.15 minion2: 114.215.142.7 操作系统版本是：
[user1@iZu1ndxa4itZ ~]$ lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.2.1511 (Core) Release: 7.2.1511 Codename: Core [user1@iZu1ndxa4itZ ~]$ uname -a Linux iZu1ndxa4itZ 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Kuberneters版本是：
Client Version: version.Info{Major:"1", Minor:"2", GitVersion:"v1.2.0", GitCommit:"ec7364b6e3b155e78086018aa644057edbe196e5", GitTreeState:"clean"} Server Version: version.Info{Major:"1", Minor:"2", GitVersion:"v1.2.0", GitCommit:"ec7364b6e3b155e78086018aa644057edbe196e5", GitTreeState:"clean"}
我可以通过在Master上发出kubectl来获得两个节点的状态。
[user1@iZu1ndxa4itZ ~]$ kubectl get nodes NAME STATUS AGE 114.215.142.7 Ready 23m 120.27.94.15 Ready 14h
Master上的组件运行良好：
[user1@iZu1ndxa4itZ ~]$ kubectl get cs NAME STATUS MESSAGE ERROR scheduler Healthy ok controller-manager Healthy ok etcd-0 Healthy {"health": "true"}
但是启动一个nginx容器后，没有Pods状态。
[user1@iZu1ndxa4itZ ~]$ kubectl run --image=nginx nginx-test deployment "nginx-test" created [user1@iZu1ndxa4itZ ~]$ kubectl get deployments NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE my-first-nginx 2 0 0 0 20h my-first-nginx01 1 0 0 0 20h my-first-nginx02 1 0 0 0 19h nginx-test 1 0 0 0 5h [user1@iZu1ndxa4itZ ~]$ kubectl get pods
任何线索来诊断问题？ 谢谢。
顺便说一句，我试图在不同的节点手动运行两个Docker容器，两个容器可以使用ping相互通信。
更新2016-08-19
从kube-apiser和kube-controller-manager的服务日志中发现线索，问题可能是由不正确的安全configuration引起的：
sudo服务kube-apiserver status -l
Aug 19 14:59:53 iZu1ndxa4itZ kube-apiserver[21393]: E0819 14:59:53.118954 21393 genericapiserver.go:716] Unable to listen for secure (open /var/run/kubernetes/apiserver.crt: no such file or directory); will try again. Aug 19 15:00:08 iZu1ndxa4itZ kube-apiserver[21393]: E0819 15:00:08.120253 21393 genericapiserver.go:716] Unable to listen for secure (open /var/run/kubernetes/apiserver.crt: no such file or directory); will try again. Aug 19 15:00:23 iZu1ndxa4itZ kube-apiserver[21393]: E0819 15:00:23.121345 21393 genericapiserver.go:716] Unable to listen for secure (open /var/run/kubernetes/apiserver.crt: no such file or directory); will try again. Aug 19 15:00:38 iZu1ndxa4itZ kube-apiserver[21393]: E0819 15:00:38.122638 21393 genericapiserver.go:716] Unable to listen for secure (open /var/run/kubernetes/apiserver.crt: no such file or directory); will try again.
sudo服务kube-controller-manager status -l
Aug 19 15:01:52 iZu1ndxa4itZ kube-controller-manager[21415]: E0819 15:01:52.138742 21415 replica_set.go:446] unable to create pods: pods "my-first-nginx02-1004561501-" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service account Aug 19 15:01:52 iZu1ndxa4itZ kube-controller-manager[21415]: I0819 15:01:52.138799 21415 event.go:211] Event(api.ObjectReference{Kind:"ReplicaSet", Namespace:"default", Name:"my-first-nginx02-1004561501", UID:"ba35be11-652a-11e6-88d2-00163e0017a3", APIVersion:"extensions", ResourceVersion:"120", FieldPath:""}): type: 'Warning' reason: 'FailedCreate' Error creating: pods "my-first-nginx02-1004561501-" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service account Aug 19 15:01:52 iZu1ndxa4itZ kube-controller-manager[21415]: E0819 15:01:52.144583 21415 replica_set.go:446] unable to create pods: pods "my-first-nginx-3671155609-" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service account Aug 19 15:01:52 iZu1ndxa4itZ kube-controller-manager[21415]: I0819 15:01:52.144657 21415 event.go:211] Event(api.ObjectReference{Kind:"ReplicaSet", Namespace:"default", Name:"my-first-nginx-3671155609", UID:"d6c8288c-6529-11e6-88d2-00163e0017a3", APIVersion:"extensions", ResourceVersion:"54", FieldPath:""}): type: 'Warning' reason: 'FailedCreate' Error creating: pods "my-first-nginx-3671155609-" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service account Aug 19 15:04:17 iZu1ndxa4itZ kube-controller-manager[21415]: I0819 15:04:17.149320 21415 event.go:211] Event(api.ObjectReference{Kind:"ReplicaSet", Namespace:"default", Name:"nginx-test-863723326", UID:"624ed0ea-65a2-11e6-88d2-00163e0017a3", APIVersion:"extensions", ResourceVersion:"12247", FieldPath:""}): type: 'Warning' reason: 'FailedCreate' Error creating: pods "nginx-test-863723326-" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service account Aug 19 15:04:17 iZu1ndxa4itZ kube-controller-manager[21415]: E0819 15:04:17.148513 21415 replica_set.go:446] unable to create pods: pods "nginx-test-863723326-" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service accoun
以下程序解决了这个问题：
openssl genrsa -out /tmp/service_account.key 2048 sudo cp /tmp/service_account.key /etc/kubernetes/service_account.key sudo vim /etc/kubernetes/apiserver KUBE_API_ARGS="--secure-port=0 --service-account-key-file=/etc/kubernetes/service_account.key" sudo service kube-apiserver restart sudo vim /etc/kubernetes/controller-manager KUBE_CONTROLLER_MANAGER_ARGS="--service_account_private_key_file=/etc/kubernetes/service_account.key" sudo service kube-controller-manager restart