CentOS 7 Kubernetes Setup Error

按照以下链接中的步骤

http://kubernetes.io/docs/getting-started-guides/centos/centos_manual_config/

走到

Start the appropriate services on node (centos-minion-n).
for SERVICES in kube-proxy kubelet flanneld docker; do
    systemctl restart $SERVICES
    systemctl enable $SERVICES
    systemctl status $SERVICES
done

时候报错如下：

 systemd[1]: Dependency failed for Kubernetes Kubelet Server. -- Subject: Unit kubelet.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit kubelet.service has failed.

 

使用以下命令查看具体错误信息：

systemctl status docker -l

错误信息：

Error initializing network controller: Error creating default \"bridge\" network: cannot create network docker0 (3957ed36665a4b84d522807cc1e4f65c8d7e06ad9e4ce9e993b7bfafc6baa489): conflicts with network d7f59ab014ac2171210c0af56b74d7646a95f2090bf559a02290c0694ac094d5 (docker0): networks have same bridge name"

 

原因：

网络冲突。

解决方法：

删除原有的网络，并重新启动kubernetes相关服务：

rm -rf /var/lib/docker/network 

for SERVICES in kube-proxy kubelet flanneld docker; do
    systemctl restart $SERVICES
    systemctl enable $SERVICES
    systemctl status $SERVICES
done

 

继续下面的配置，并在master机器使用以下命令查看集群状态：

kubectl get nodes

 

参考资料：

https://github.com/docker/docker/issues/23630