使用Google云平台进行kubernetes-dashboard登录的令牌

Question

我在使用谷歌云平台和库伯内特斯。

我试图找出我应该使用哪个令牌才能登录到仪表板，并有足够的权限随心所欲。

我在谷歌云平台上创建了一个3节点的Kubernetes 1.8.6集群

my developer desktop是macos high sierra 10.13.2上的Mac Pro（2013年底），安装了google cloud sdk和kubernetes cli。

~ ❯❯❯ kubectl version                                                                                                         ✘ 1
Client Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.1", GitCommit:"3a1c9449a956b6026f075fa3134ff92f7d55f812", GitTreeState:"clean", BuildDate:"2018-01-04T20:00:41Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"8+", GitVersion:"v1.8.6-gke.0", GitCommit:"ee9a97661f14ee0b1ca31d6edd30480c89347c79", GitTreeState:"clean", BuildDate:"2018-01-05T03:36:42Z", GoVersion:"go1.8.3b4", Compiler:"gc", Platform:"linux/amd64"}

和

~ ❯❯❯ gcloud version
Google Cloud SDK 184.0.0
bq 2.0.28
core 2018.01.05
gsutil 4.28

我在文档中读到，为仪表板创建管理员用户是不安全的，不幸的是，仪表板pod的所有权限让我有点困惑。

当我执行kubectl get secrets-n kube system并用kubectl get secret解码其中一个令牌时

然后使用kubectl web proxy登录。我从命令kubectl proxy开始，当我试图查看仪表板web界面中的任何页面时，会出现很多权限错误。我可能没有使用正确的代币。。或者我需要创建一个新令牌。

有没有办法查看代币的权限，这样我就可以在登录前知道我要用什么登录？

所以我运行kubectl来获取库贝-system命名空间中的所有秘密令牌：

~ ❯❯❯ kubectl get secrets -n kube-system
NAME                                     TYPE                                  DATA      AGE
attachdetach-controller-token-4pp92      kubernetes.io/service-account-token   3         10m
certificate-controller-token-bqnjp       kubernetes.io/service-account-token   3         10m
cloud-provider-token-ltbnh               kubernetes.io/service-account-token   3         10m
cronjob-controller-token-84cl9           kubernetes.io/service-account-token   3         10m
daemon-set-controller-token-ncz5r        kubernetes.io/service-account-token   3         10m
default-token-fpmht                      kubernetes.io/service-account-token   3         10m
deployment-controller-token-4xc8k        kubernetes.io/service-account-token   3         10m
disruption-controller-token-9gdqg        kubernetes.io/service-account-token   3         10m
endpoint-controller-token-gr29m          kubernetes.io/service-account-token   3         10m
event-exporter-sa-token-6klz5            kubernetes.io/service-account-token   3         10m
fluentd-gcp-token-s2kk4                  kubernetes.io/service-account-token   3         10m
generic-garbage-collector-token-tqbqz    kubernetes.io/service-account-token   3         10m
heapster-token-7pgmr                     kubernetes.io/service-account-token   3         10m
horizontal-pod-autoscaler-token-74v57    kubernetes.io/service-account-token   3         10m
job-controller-token-2skhj               kubernetes.io/service-account-token   3         10m
kube-dns-autoscaler-token-wc9gz          kubernetes.io/service-account-token   3         10m
kube-dns-token-nx2tf                     kubernetes.io/service-account-token   3         10m
kubernetes-dashboard-certs               Opaque                                0         10m
kubernetes-dashboard-key-holder          Opaque                                2         9m
kubernetes-dashboard-token-zxp7n         kubernetes.io/service-account-token   3         10m
namespace-controller-token-tz54r         kubernetes.io/service-account-token   3         10m
node-controller-token-m2w7k              kubernetes.io/service-account-token   3         10m
persistent-volume-binder-token-6sfkt     kubernetes.io/service-account-token   3         10m
pod-garbage-collector-token-zqxhd        kubernetes.io/service-account-token   3         10m
replicaset-controller-token-8n6b7        kubernetes.io/service-account-token   3         10m
replication-controller-token-nb2tw       kubernetes.io/service-account-token   3         10m
resourcequota-controller-token-blhfg     kubernetes.io/service-account-token   3         10m
route-controller-token-c5ns6             kubernetes.io/service-account-token   3         10m
service-account-controller-token-zptxc   kubernetes.io/service-account-token   3         10m
service-controller-token-75hht           kubernetes.io/service-account-token   3         10m
statefulset-controller-token-fhpk8       kubernetes.io/service-account-token   3         10m
ttl-controller-token-5vwln               kubernetes.io/service-account-token   3         10m

然后我处决了

kubectl get secret kubernetes-dashboard-token-zxp7n -n=kube-system -o json | jq -r '.data["token"]' | base64 -D > user_token.txt

并使用该令牌登录。

登录后，我收到以下消息：

warning
configmaps is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list configmaps in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
persistentvolumeclaims is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list persistentvolumeclaims in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
secrets is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list secrets in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
services is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list services in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
ingresses.extensions is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list ingresses.extensions in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
daemonsets.apps is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list daemonsets.apps in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
pods is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list pods in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
events is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list events in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
deployments.apps is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list deployments.apps in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
replicasets.apps is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list replicasets.apps in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
jobs.batch is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list jobs.batch in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
cronjobs.batch is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list cronjobs.batch in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
replicationcontrollers is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list replicationcontrollers in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"
close
warning
statefulsets.apps is forbidden: User "system:serviceaccount:kube-system:kubernetes-dashboard" cannot list statefulsets.apps in the namespace "default": Unknown user "system:serviceaccount:kube-system:kubernetes-dashboard"

知道为什么吗？




Answer 1

我也遇到了同样的问题——在我的案例中，解决方案是从kubectl config view获取访问令牌：

[...]
users:
- name: <YOUR CLUSTER NAME>
  user:
    auth-provider:
      config:
        access-token: <YOUR ACCESS TOKEN>
        cmd-args: config config-helper --format=json
        cmd-path: /usr/local/lib/google-cloud-sdk/bin/gcloud
        expiry: 2018-02-12T13:36:51Z
        expiry-key: '{.credential.token_expiry}'
        token-key: '{.credential.access_token}'
      name: gcp
[...]

Answer 2

gCloud不将凭据放入kubeconfig中，而是将它们保存在自己的文件中。

有了GKE，你可以为你的GCloud账户获得代币——这比从服务账户中重新使用代币要好得多。

假设您已经安装了jq，您可以像这样获得您的个人访问令牌：

gcloud get-credentials <GKE cluster name> --zone <zone> --project <project>
gcloud config config-helper --format=json | jq .credential.access_token

Answer 3

用gCloud容器连接集群后，集群获取凭据。使用以下命令获取当前上下文的访问令牌

kubectl config view | grep -A10 "name: $(kubectl config current-context)" | awk '$1=="access-token:"{print $2}'