Hello. There is a long living blueprint [0] about HA fencing of failed nodes in Corosync and Pacemaker cluster. Happily, in 6.0 release we have a pluggable architecture supported in Fuel. I propose the following implementation [1] (WIP repo [2]) for this feature as a plugin for puppet. It addresses the related blueprint for HA Fencing in puppet manifests of Fuel library [3]. For initial version, all the data definitions for power management devices should be done manually in YAML files (see the plugin's README.md file). Later it could be done in a more user friendly way, as a part of Fuel UI perhaps. Note that the similar approach - YAML data structures which should be filled in by the cloud admin and passed to Fuel Orchestrator automatically at PXE provision stage - could be used as well for Power management blueprint, see the related ML thread [4]. Please also note, there is a dev docs for Fuel plugins merged recently [5] where you can find how to build and install this plugin. [0] https://blueprints.launchpad.net/fuel/+spec/ha-fencing [1] https://review.openstack.org/#/c/144425/ [2] https://github.com/bogdando/fuel-plugins/tree/fencing_puppet_newprovider/ha_fencing [3] https://blueprints.launchpad.net/fuel/+spec/fencing-in-puppet-manifests [4] http://lists.openstack.org/pipermail/openstack-dev/2014-November/049794.html [5] http://docs.mirantis.com/fuel/fuel-6.0/plugin-dev.html#what-is-pluggable-architecture -- Best regards, Bogdan Dobrelya, Skype #bogdando_at_yahoo.com Irc #bogdando