The Release Candidate of the upcoming OpenNebula 6.0 “Mutara” is now available for download! 
Many thanks for your feedback and contributions to this new version!
These days the OpenNebula team will still be in “bug-fixing mode”, in preparation for the stable release that will come out in a matter of days, so you are more than welcome to keep sending feedback for that final version! 
Please check the known issues before submitting an issue through GitHub. Also note that, being a beta, there is no migration path from the previous stable version (5.12.x) nor migration path to the final stable version (6.0). A list of open issues can be found in the GitHub development portal.
Stay tuned, the stable release is around the corner! 