d528728090
This patch is adding a new cleaning step called "erase_devices_metadata" to the GenericHardwareManager. This step is responsible for erasing the metadata of the disks present in the node (partition tables, signatures, filesystem identifiers etc...). It's important to note that the "erase_devices" cleaning step will also remove all these metadatas (because it will zero/shred the whole disk) but, it takes a lot of time to run and for some usages of Ironic only cleaning the device metadata and leaving the data from previous tenants on the disk after the machine is recycled is fine. That's the use case for systems using Ironic just to install the same base image onto many nodes which will run another cloud on top afterwards (TripleO). The new cleaning step has a default priority of 99, so it should run before the "erase_devices" cleaning step so that we can guarantee that the metadata was removed even in case of a failure when cleaning the disks. The version of the GenericHardwareManager was bumped to "1.1" with the addition of this new clean step. This patch make use of the "destroy_disk_metadata" method from ironic-lib to get rid of the metadata. Closes-Bug: #1603411 Change-Id: I3d7b39d5ee3e03ce63185e4168b1ac954a896c93 |
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