Kubernetes遇到過的坑

遇到的問題

今天在測試kubernetes時，在從節點執行kubectl get pods命令出現如下錯誤：

[root@centos6 etcd-v3.4.7-linux-amd64]# kubectl get pods
W0504 22:52:02.915343   59377 loader.go:223] Config not found: /etc/kubernetes/admin.conf
The connection to the server localhost:8080 was refused - did you specify the right host or port?

根據反饋得知找不到/etc/kubernetes/admin.conf這個文件，我之前搭建集群時是沒有錯誤的，現在不知道為啥沒有了。

解決方法

雖然不知道為啥這個文件莫名其妙消失了，但是無妨，見招拆招吧直接。

首先在該從節點建立此文件；再將主節點的/etc/kubernetes/admin.conf文件內容copy過來；最后執行

echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile

立即重啟

source ~/.bash_profile

再次驗證

[root@centos6 kubernetes]# kubectl get pods
NAME                                     READY   STATUS    RESTARTS   AGE
frontend-2zjjs                           1/1     Running   3          16d
frontend-4tfhb                           1/1     Running   3          16d
frontend-j5srv                           1/1     Running   2          16d
frontend-pm82l                           1/1     Running   2          16d
nginx-deployment-54f57cf6bf-42z85        1/1     Running   3          16d
nginx-deployment-54f57cf6bf-kflt4        1/1     Running   3          16d
nginx-deployment-54f57cf6bf-rzhjj        1/1     Running   3          16d
nginx-deployment-54f57cf6bf-wlz76        1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-9mgzn   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-bzmq2   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-c7tdc   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-frxj4   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-fxdw2   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-gxkff   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-nnrnd   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-pqdtd   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-rmjq2   1/1     Running   3          16d
test-nginx-deployment-54f57cf6bf-t2l4d   1/1     Running   3          16d
web-0                                    0/1     Pending   0          51d

執行成功！