Openshift Deploy an Apps pulling from External Registry

Openshift-Deploy-from-External-Registry

To deploy apps in openshift using private image registry with password, need to :
1) Create secret to the private registry :
   oc create secret docker-registry <pull_secret_name> \
    --docker-server=<registry_server> \
    --docker-username=<user_name> \
    --docker-password=<password> \
    --docker-email=<email>
    
 2) Put pull secret to default ServiceAccount (assume deployment using SA default) :
    oc secrets link default <pull_secret_name> --for=pull
    
 3) Create an image stream tag to openshift project