### Relationship between the CLI and controller

The CLI and controller share the same API and codebase for generating manifests from the API. You can think of the
controller as the CLI command `istioctl install` running in a loop in a pod in the cluster and using the config
from the in-cluster IstioOperator custom resource (CR).
There are two major differences:

1. The fields defined in the user CR override any values defined in the configuration profile CR.  The
resulting CR is converted to Helm values.yaml format and passed to the next step.
1. Part of the configuration profile contains settings in the Helm values.yaml schema format. User overrides of
these fields are applied and merged with the output of this step. The result of this step is a merge of configuration