- Improved scaling using nested stacks
- Heat will RPC actions on any resource that is based on a template. This should help to spread the load when dealing with large complex stacks.
- oslo versioned objects
- The database layer now uses oslo versioned objects to aid in future upgrades. This will allow a newly upgraded heat-engine to use a database with an older schema. Note that this will not help with upgrading to kilo.
- New template functions
- There is a new HOT template version "20150430" which includes two new functions "digest" and "repeat".
- Multiregion stacks
- Access to Heat services
- The admin now has similar access to services as other projects. This is in the form of "heat-manage service-list" and via horizon. This feature reports the active heat-engines.
- Improved validation for nova and neutron properties.
- Pause stack creation/update on a given resource (stack hooks)
- New contributed resources
- Stack lifecycle scheduler hints
- Software-config improvements