Extra Args, Extra Binds, and Extra Environment Variables

RKE supports additional service arguments, volume binds and environment variables.

Extra Args

For any of the Kubernetes services, you can update the extra_args to change the existing defaults.

As of v0.1.3, using extra_args will add new arguments and override any existing defaults. For example, if you need to modify the default admission controllers list, you need to include the default list and edit it with your changes so all changes are included.

Prior to v0.1.3, using extra_args would only add new arguments to the list and there was no ability to change the default list.

services:
    kube-controller:
      extra_args:
        cluster-name: "mycluster"

Extra Binds

Additional volume binds can be added to services using the extra_binds arguments.

services:
    kubelet:
      extra_binds:
        - "/host/dev:/dev"
        - "/usr/libexec/kubernetes/kubelet-plugins:/usr/libexec/kubernetes/kubelet-plugins:z"

Extra Environment Variables

Additional environment variables can be added to services by using the extra_env arguments.

services:
    kubelet:
      extra_env:
        - "HTTP_PROXY=http://your_proxy"