The Juno version of OpenStack is supported in the following versions of Oracle Solaris:
Oracle Solaris 11.2 SRU 10 and later releases
Oracle Solaris 11.3
If you have an existing Havana configuration on systems running the SRU 10 or SRU 11 releases of Oracle Solaris 11.2, follow the manual steps documented in https://community.oracle.com/docs/DOC-910993 to upgrade to the Juno version. Beginning with Oracle Solaris 11.2 SRU 12, the upgrade process from Havana to Juno is automatic.