docs/user/README.md
Impersonation uses a reverse proxy to inject a user's identifying information (username, groups and extra scopes) as headers in each request to the API server. The Dashboard can pass these headers to the API server if your reverse proxy will inject them in the requests.
Impersonation is useful in situations where using a user's token isn't available, such as cloud-hosted Kubernetes services. To use impersonation a reverse proxy must:
Impersonate-User header with a unique name identifying the userImpersonate-Group header(s) with the impersonated user's group dataImpersonate-Extra header(s) with additional authorization dataImpersonation will only work when the reverse proxy provides the Authorization header with a valid service account. It will not work with any other method of authenticating to the dashboard.
Copyright 2019 The Kubernetes Dashboard Authors