User Types

Interaction with OKD cluster is associated with a user. An OKD user object represents a user who may be granted permissions in the system by adding roles to that user or to a user's group via rolebindings.

Regular users

This is the way most interactive OKD users are represented. Regular users are represented with the User object. This type of user represents a person that has been allowed access to the platform. Examples of regular users include user1 and user2.

System users

Many of these are created automatically when the infrastructure is defined, mainly for the purpose of enabling the infrastructure to securely interact with the API. System users include a cluster administrator (with access to everything), a per-node user, users for use by routers and registries, and various others. An anonymous system user also exists that is used by default for unauthenticated requests. Examples of system users include: system:admin, system:openshift-registry, and system:node:node1.example.com.

Service accounts

These are special system users associated with projects; some are created automatically when the project is first created, and project administrators can create more for the purpose of defining access to the contents of each project. Service accounts are often used to give extra privileges to pods or deployment configurations. Service accounts are represented with the ServiceAccount object. Examples of service account users include system:serviceaccount:default:deployer and system:serviceaccount:foo:builder.

Every user must authenticate before they can access OKD cluster. API requests with no authentication or invalid authentication are authenticated as requests by the anonymous system user. After successful authentication, policy determines what the user is authorized to do.

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