A service account is an OKD account that allows a component to directly access the API. Service accounts are API objects that exist within each project. Service accounts provide a flexible way to control API access without sharing a regular user’s credentials.
When you use the OKD CLI or web console, your API token authenticates you to the API. You can associate a component with a service account so that they can access the API without using a regular user’s credentials. For example, service accounts can allow:
Replication controllers to make API calls to create or delete pods.
Applications inside containers to make API calls for discovery purposes.
External applications to make API calls for monitoring or integration purposes.
Each service account’s user name is derived from its project and name:
Every service account is also a member of two groups:
Includes all service accounts in the system.
Includes all service accounts in the specified project.
Each service account automatically contains two secrets:
An API token
Credentials for the OpenShift Container Registry
The generated API token and registry credentials do not expire, but you can revoke them by deleting the secret. When you delete the secret, a new one is automatically generated to take its place.
You can create a service account in a project and grant it permissions by binding it to a role.
Optional: To view the service accounts in the current project:
$ oc get sa
NAME SECRETS AGE builder 2 2d default 2 2d deployer 2 2d
To create a new service account in the current project:
$ oc create sa <service_account_name> (1)
|1||To create a service account in a different project, specify
serviceaccount "robot" created
Optional: View the secrets for the service account:
$ oc describe sa robot
Name: robot Namespace: project1 Labels: <none> Annotations: <none> Image pull secrets: robot-dockercfg-qzbhb Mountable secrets: robot-token-f4khf robot-dockercfg-qzbhb Tokens: robot-token-f4khf robot-token-z8h44
You can grant roles to service accounts in the same way that you grant roles to a regular user account.
You can modify the service accounts for the current project. For example, to add
view role to the
robot service account in the
$ oc policy add-role-to-user view system:serviceaccount:top-secret:robot
You can also grant access to a specific service account in a project. For
example, from the project to which the service account belongs, use
-z flag and specify the
$ oc policy add-role-to-user <role_name> -z <service_account_name>
If you want to grant access to a specific service account in a project, use the
To modify a different namespace, you can use the
-n option to indicate the
project namespace it applies to, as shown in the following examples.
For example, to allow all service accounts in all projects to view resources in
$ oc policy add-role-to-group view system:serviceaccounts -n top-secret
To allow all service accounts in the
managers project to edit resources in the
$ oc policy add-role-to-group edit system:serviceaccounts:managers -n top-secret