I can add users to the cluster-role "cluster-admin" with:
oc adm policy add-cluster-role-to-user cluster-admin <user>
But how can I list all users with the role cluster-admin?
Environment: OpenShift 3.x
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5 Answers
Found it myself:
It's in the RoleBinding[cluster-admins]: section of:
oc describe clusterPolicyBindings :default
With jq you can get the list of users in one command:
oc get --all-namespaces --output json clusterPolicyBindings | jq '.items[].roleBindings[] | select(.name=="cluster-admins") | .roleBinding.userNames'
For OpenShift 3.7 and newer:
oc get clusterrolebindings -o json | jq '.items[] | select(.metadata.name=="cluster-admins") | .userNames'
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if anyone is looking for how to check a user has a local role binding in a script to know whether to grant it i used this answer to come up with this that works on openshift 3.11 github.com/ocd-scm/ocd-environment-webhook/blob/… Feb 2, 2019 at 21:04
in openshift 3.9 the cluster admins are located in different dictionaries(cluster-admin-0,cluster-admin-1, and so on). To list them:
oc get clusterrolebinding -o json | jq '.items[] | select(.metadata.name | startswith("cluster-admin")) | .userNames'
From my side command for Openshift 3.7+ is for cluster-admins :
oc get --all-namespaces --output json clusterPolicyBindings | jq '.items[].roleBindings[] | select(.name=="cluster-admin") | .roleBinding.userNames'
For cluster-reader role :
oc get clusterrolebindings -o json | jq '.items[] | select(.metadata.name=="cluster-readers") | .userNames'
Openshift 4.8
oc get clusterrolebindings -o json |
jq '.items[] | select(.metadata.name=="cluster-admins") | .subjects[].name'
Most of the above responses do not address OP's question:
But how can I list all users with the role cluster-admin?
Instead they are getting the users behind a very specific clusterrolebinding named cluster-admins, not all users belonging to any clusterrolebinding that gets the ClusterRole/cluster-admin.
For that, in OpenShift 4.8, you would filter by the role asigned to the clusterrolebinding first, and then get the users
oc get clusterrolebindings -o json |jq '.items[] |select(.roleRef.name=="cluster-admin") |.subjects[] |select(.kind=="User") |.name'
