kubectl create secret docker-registry regcred --docker-server=<your-registry-server> --docker-username=<your-name> --docker-password=<your-pword> --docker-email=<your-email>

apiVersion: v1
data:
  .dockerconfigjson: eyJhdXRocyI6eyJyZWdpc3......sSFJTMURWWE53Y3pWVU5GYz0ifX19
kind: Secret
metadata:
  creationTimestamp: 2018-04-23T09:18:38Z
  name: regcred
  namespace: default
  resourceVersion: "9643"
  selfLink: /api/v1/namespaces/default/secrets/regcred
  uid: 4e90132c-46d7-11e8-9169-525400893741
type: kubernetes.io/dockerconfigjson

{"auths":{"registry.gitlab.com":{"username":"my_username","password":"my_token","email":"my_email@gmail.com","auth":"YX...zVUNFc="}}}%

apiVersion: v1
kind: Pod
metadata:
  name: private-reg
spec:
  containers:
  - name: private-reg-container
    image: registry.gitlab.com/path/to/build/image:latest
  imagePullSecrets:
  - name: regcred