552a927e56
This adds a periodic task which can rebuild the conductor's local state (PXE config files, etc) when conductors join or leave the cluster. For any node which is newly mapped to the conductor, this will trigger calling prepare() and take_over() on that node's deploy interface. This uses the periodic_max_worker setting like other periodic jobs, starting the take over process in separate threads. Thus, in a large cluster, it may take some time for all nodes to settle down. It also adds a new CONF option to control the timing of this job. There is a lot of room for improvement and optimization in this, however getting a fix in place is critical to the Juno release. NOTE: This does not re-establish any console sessions. Co-Authored-By: Lucas Alvares Gomes <lucasagomes@gmail.com> Change-Id: I0dbe9a5a98ec5fd0c69f32d7590d8141da5a23c2 Closes-bug: #1279331
Ironic
Ironic is an Incubated OpenStack project which aims to provision bare metal machines instead of virtual machines, forked from the Nova Baremetal driver. It is best thought of as a bare metal hypervisor API and a set of plugins which interact with the bare metal hypervisors. By default, it will use PXE and IPMI in concert to provision and turn on/off machines, but Ironic also supports vendor-specific plugins which may implement additional functionality.
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