This is image wraps rancher-cli and kubectl to use the "rancher kubectl" method without any extras.
The offical rancher/cli image, doesn't have kubectl pre-installed. So the rancher kubectl method becomes useless.
I solved this problem with a custom Docker image which extends the rancher/cli image and installs kubectl.
Now the rancher kubectl command works like a charm and you don't need to handle the installation of kubectl by yourself.
Useful for CI/CD's.