Which command links the secret quayio to the builder service account so S2I can use it?

• A. oc create rolebinding image-puller --group system:image-puller
• B. oc policy add-role-to-group system:image-puller system:serviceaccount:myphp -n otherphp
• C. oc policy add-role-to-group system:image-puller system:serviceaccount:myphp -n shared
• D. oc policy remove-role-to-group system:image-puller

Answer: (B)

OpenShift needs the builder’s service account to have permission to pull the base image from a registry for S2I to run using the credentials in your quay.io secret. The way to do this is by binding the image-puller role to that specific service account in the namespace where the builder operates. The command that attaches the image-puller role to the service account named myphp in the otherphp namespace does exactly that: it grants the necessary image pull permission to the builder’s service account in the correct scope, enabling S2I to access the private quay.io image using the secret.

The other options either try to create or remove bindings without tying them to the specific service account in the right namespace, or refer to removing access, which would not enable the build to proceed. This targeted role binding is the appropriate step to authorize image pulls needed by the builder during the S2I process.