Please let me know if I can deploy juju on Eucalyptus, if yes please provide me the configuration details which i need to edit on environments.yaml file.
As long as eucalyptus provides ec2 API, you can use juju to deploy your workload on it.
And config is similar to ec2's. Modify endpoint accordingly. Note that we do not routinely test on Eucalyptus, but if you want to provide a working configuration snippet you can send it to the Juju mailing list for consideration of including it in the documentation.