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kubernetes - Kubernetes 仪表板 CrashLoopBackOff

问题描述

全新的 kubernetes，但设法安装 kubernetes，ubuntu 20.04 LTS，但仪表板有问题。按照程序，使用法兰绒作为 CNF。

日志指出与 10.96.0.1:443 的连接存在问题，但 telnet 似乎可以工作？任何建议如何进一步？

bwa@prod3:~$ kubectl get pods -o wide --all-namespaces
NAMESPACE              NAME                                         READY   STATUS             RESTARTS   AGE   IP             NODE    NOMINATED NODE   READINESS GATES
kube-system            coredns-66bff467f8-jgmpl                     0/1     Running            1          27h   10.244.0.6     prod3   <none>           <none>
kube-system            coredns-66bff467f8-ldr9d                     0/1     Running            1          27h   10.244.0.9     prod3   <none>           <none>
kube-system            etcd-prod3                                   1/1     Running            1          27h   192.168.0.93   prod3   <none>           <none>
kube-system            kube-apiserver-prod3                         1/1     Running            1          27h   192.168.0.93   prod3   <none>           <none>
kube-system            kube-controller-manager-prod3                1/1     Running            1          27h   192.168.0.93   prod3   <none>           <none>
kube-system            kube-flannel-ds-amd64-xm26h                  1/1     Running            2          27h   192.168.0.93   prod3   <none>           <none>
kube-system            kube-proxy-7lk5d                             1/1     Running            1          27h   192.168.0.93   prod3   <none>           <none>
kube-system            kube-scheduler-prod3                         1/1     Running            1          27h   192.168.0.93   prod3   <none>           <none>
kubernetes-dashboard   dashboard-metrics-scraper-6b4884c9d5-xrdbh   1/1     Running            1          27h   10.244.0.7     prod3   <none>           <none>
kubernetes-dashboard   kubernetes-dashboard-7f99b75bf4-lfqtf        0/1     CrashLoopBackOff   310        27h   10.244.0.8     prod3   <none>           <none>


bwa@prod3:~$ kubectl logs kubernetes-dashboard-7f99b75bf4-lfqtf --namespace=kubernetes-dashboard --tail=100
    2020/08/05 12:02:31 Starting overwatch
    2020/08/05 12:02:31 Using namespace: kubernetes-dashboard
    2020/08/05 12:02:31 Using in-cluster config to connect to apiserver
    2020/08/05 12:02:31 Using secret token for csrf signing
    2020/08/05 12:02:31 Initializing csrf token from kubernetes-dashboard-csrf secret
    panic: Get "https://10.96.0.1:443/api/v1/namespaces/kubernetes-dashboard/secrets/kubernetes-dashboard-csrf": dial tcp 10.96.0.1:443: i/o timeout
    
    goroutine 1 [running]:
    github.com/kubernetes/dashboard/src/app/backend/client/csrf.(*csrfTokenManager).init(0xc00000c640)
            /home/runner/work/dashboard/dashboard/src/app/backend/client/csrf/manager.go:41 +0x446
    github.com/kubernetes/dashboard/src/app/backend/client/csrf.NewCsrfTokenManager(...)
            /home/runner/work/dashboard/dashboard/src/app/backend/client/csrf/manager.go:66
    github.com/kubernetes/dashboard/src/app/backend/client.(*clientManager).initCSRFKey(0xc00044f800)
            /home/runner/work/dashboard/dashboard/src/app/backend/client/manager.go:501 +0xc6
    github.com/kubernetes/dashboard/src/app/backend/client.(*clientManager).init(0xc00044f800)
            /home/runner/work/dashboard/dashboard/src/app/backend/client/manager.go:469 +0x47
    github.com/kubernetes/dashboard/src/app/backend/client.NewClientManager(...)
            /home/runner/work/dashboard/dashboard/src/app/backend/client/manager.go:550
    main.main()
            /home/runner/work/dashboard/dashboard/src/app/backend/dashboard.go:105 +0x20d
    bwa@prod3:~$ telnet 10.96.0.1 443
    Trying 10.96.0.1...
    Connected to 10.96.0.1.
    Escape character is '^]'.
    ^CConnection closed by foreign host.
    bwa@prod3:~$

标签： kuberneteskubernetes-dashboard

解决方案

从该集群的外观来看，您没有安装网络插件 (CNI)。我在 kube-system 命名空间中看不到任何 flannel pod，并且 coredns pod 没有启动。

这也可以解释为什么仪表板会出现恐慌，因为它无法通过 10.96.0.1 服务访问 K8s API 服务器。

你可以检查法兰绒安装（或只是在集群上重新安装法兰绒）？

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