RBAC Lookup is a CLI that allows you to easily find Kubernetes roles and cluster roles bound to any user, service account, or group name. Binaries are generated with goreleaser for each release for simple installation.
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brew install FairwindsOps/tap/rbac-lookup
kubectl krew install rbac-lookup
In the simplest use case, rbac-lookup will return any matching user, service account, or group along with the roles it has been given.
rbac-lookup rob
SUBJECT SCOPE ROLE
[email protected] cluster-wide ClusterRole/view
[email protected] nginx-ingress ClusterRole/edit
The wide output option includes the kind of subject along with the source role binding.
rbac-lookup rob --output wide
SUBJECT SCOPE ROLE SOURCE
User/[email protected] cluster-wide ClusterRole/view ClusterRoleBinding/rob-cluster-view
User/[email protected] nginx-ingress ClusterRole/edit RoleBinding/rob-edit
User/[email protected] web ClusterRole/edit RoleBinding/ron-edit
ServiceAccount/rops infra ClusterRole/admin RoleBinding/rops-admin
It's also possible to filter output by the kind of RBAC Subject. The --kind or -k parameter accepts user, group, and serviceaccount as values.
rbac-lookup ro --output wide --kind user
SUBJECT SCOPE ROLE SOURCE
User/[email protected] cluster-wide ClusterRole/view ClusterRoleBinding/rob-cluster-view
User/[email protected] nginx-ingress ClusterRole/edit RoleBinding/rob-edit
User/[email protected] web ClusterRole/edit RoleBinding/ron-edit
If you're connected to a GKE cluster, RBAC is only half the story here. Google Cloud IAM roles can grant cluster access. Cluster access is effectively determined by a union of IAM and RBAC roles. To see the relevant IAM roles along with RBAC roles, use the --gke flag.
rbac-lookup rob --gke
SUBJECT SCOPE ROLE
[email protected] cluster-wide ClusterRole/view
[email protected] nginx-ingress ClusterRole/edit
[email protected] project-wide IAM/gke-developer
[email protected] project-wide IAM/viewer
Of course this GKE integration also supports wide output, in this case referencing the specific IAM roles that are assigned to a user.
rbac-lookup rob --gke --output wide
SUBJECT SCOPE ROLE SOURCE
User/[email protected] cluster-wide ClusterRole/view ClusterRoleBinding/rob-cluster-view
User/[email protected] nginx-ingress ClusterRole/edit RoleBinding/rob-edit
User/[email protected] project-wide IAM/gke-developer IAMRole/container.developer
User/[email protected] project-wide IAM/gcp-viewer IAMRole/viewer
At this point this integration only supports standard IAM roles, and is not advanced enough to include any custom roles. For a full list of supported roles and how they are mapped, view lookup/gke_roles.go.
--context string context to use for Kubernetes config
--gke enable GKE integration
-h, --help help for rbac-lookup
-k, --kind string filter by this RBAC subject kind (user, group, serviceaccount)
--kubeconfig string config file location
-o, --output string output format (normal, wide)
While RBAC Lookup helps provide visibility into Kubernetes auth, RBAC Manager helps make auth simpler to manage. This is a Kubernetes operator that enables more concise RBAC configuration that is easier to scale and automate. For more information, see RBAC Manager on GitHub.
Apache License 2.0