I have installed kubernetes cluster using kops.

From the node where kops install kubectl all works perfect (lets say node A).

I'm trying connect to kubernetes cluster from another server with installed kubectl on it (node B). I have copied ~/.kube from node A to B. But when I'm trying execute basic command like:

kubectl get pods

I'm getting:

Unable to connect to the server: x509: certificate signed by unknown authority

My config file is:

apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSU.........
    server: https://api.kub.domain.com
  name: kub.domain.com
contexts:
- context:
    cluster: kub.domain.com
    user: kub.domain.com
  name: kub.domain.com
current-context: kub.domain.com
kind: Config
preferences: {}
users:
- name: kub.domain.com
  user:
    client-certificate-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0F..........
    client-key-data: LS0tLS1CRUdJTiBSU0EgUFJJVkFURSBLRVk..........
    password: r4ho3rNbYrjqZOhjnu8SJYXXXXXXXXXXX
    username: admin
- name: kub.domain.com-basic-auth
  user:
    password: r4ho3rNbYrjqZOhjnu8SJYXXXXXXXXXXX
    username: admin

Appreciate any help