To add a group policy perform the steps listed in this topic.
euare-groupaddpolicy -g <group_name> -p <policy_name> -e <effect> -a <actions> -o
The optional -o parameter tells Eucalyptus to return the JSON policy, as in this example:
{"Version":"2008-10-17","Statement":[{"Effect":"Allow", "Action":["ec2:RunInstances"], "Resource":["*"]}]}