Does Oracle support Oracle RAC in Solaris containers (a.k.a. Solaris Zones)?
YES for Oracle RAC 10g Rel. 2 onwards. While Global containers have been supported for a while, Oracle added support for local containers recently after the local containers were extended to allow direct hardware modification. Lifting this restriction allow Oracle Clusterware to operate on hardware resources such as the network for the Oracle VIP directly, enabling Oracle RAC to run in local containers. More information about Solaris container support can be found in Oracle Certify.