Groups
A User may belong to one or more Groups. A Group is simply a way to collect Users according to whatever classification needed by the Cluster administrators (e.g. roles in a company such as DevOps or developers, different groupings of workloads, etc...). Groups can be especially useful for access control where you can apply Policies to a whole set of Users instead of trying to enforce them upon each one. Here is an example:
And you can attach a Group to a User simply as follows:
You can obviously attach as many Groups as you wish to a certain User. Here is an example:
Listing Groups
You can list the Cluster's Groups (read more about listing resources here) as follows:
Policies
Policies (read more about Policies and access control here) can be created and/or attached to Groups where they can act as principal-based policies for all the Users belonging to a certain Group. Here is an example:
Attributes
You can extend the information of a Group by feeding it additional information manually or dynamically via the APIs (read more here) from external sources (e.g. IAM platforms, SIEM tools, threat intelligence tools, incident alerting and on-call management tools, etc...). Such additional information can be especially useful for extending access control and making it as fine-grained and dynamic as you wish (read more here). Here is an example:
The attrs field is also available for Users, Services and Namespaces.