Importing Dashboard, but prometheus no datasources found

Hello,

I am new to grafana, I am using k8s:

kubeadm version: &version.Info{Major:“1”, Minor:“18”, GitVersion:“v1.18.3”, GitCommit:“2e7996e3e2712684bc73f0dec0200d64eec7fe40”, GitTreeState:“clean”, BuildDate:“2020-05-20T12:49:29Z”, GoVersion:“go1.13.9”, Compiler:“gc”, Platform:“linux/amd64”}

CentOS Linux release 7.8.2003 (Core)

Linux 5.7.8-1.el7.elrepo.x86_64

Please see below screenshot