Out-of-band disk-erase for Gen10 and above HPE Proliant Servers

Out-of-band disk-erase for Gen10 and above HPE Proliant Servers

https://storyboard.openstack.org/#!/story/2004786

This specification proposes implementation of out-of-band disk-erase for iLO5 managed HPE Proliant servers.

Problem description

In the current scenario where disk-erase on HPE Proliant servers is done only via inband cleaning, iLO5 based HPE Proliant Gen10 servers provide support to perform out-of-band disk-erase which was not there in Gen9 and older servers. However, disk-erase request would be accepted by iLO only when system boot completes POST. Hence disk-erase needs to be accompanied by a reboot.

Proposed change

This spec proposes to implement out-of-band disk-erase clean_step in hardware type ilo5 under new management interface Ilo5Management which would be inherited from existing management interface IloManagement.

List of changes required:

  • The following would be the composition of the new management interface Ilo5Management:

    • erase_devices - This will erase all disks on the baremetal node.

      • erase_devices will call proliantutils library method do_disk_erase to perform the operation in iLO. User can also choose between different erase pattern (ex. block, overwrite, crypto, zero) to perform the disk erase operation.

      • The reboot is required to initiate the disk erase. The actual disk erase operation would take time based on disk type and size.

Alternatives

One can perform in-band disk-erase to achieve the same result. However, The ramdisk to be used in such case should have proliant-tools element that bundles ‘ssacli’ utility required for disk-erase operations as part of the image.

Data model impact

None

State Machine Impact

None

REST API impact

None

Client (CLI) impact

None

RPC API impact

None

Driver API impact

None

Nova driver impact

None

Ramdisk impact

None

Security impact

None

Other end user impact

None

Scalability impact

None

Performance Impact

None

Other deployer impact

Users need to configure two options to make use of OOB disk-erase on HPE Proliant Gen10 servers.

  • Configure the hardware type ilo5 to ([DEFAULT] enabled_hardware_types).

  • Configure the new management interface ilo5 to ([DEFAULT] enabled_management_interfaces).

Developer impact

None

Implementation

Assignee(s)

Primary assignee: pareshsao

Work Items

  • Add a new management interface Ilo5Management to hardware type ilo5

  • Writing unit-test cases for the new OOB disk-erase interface.

Dependencies

Support for OOB disk-erase in proliantutils is under development and is yet to be released.

Testing

Unit test cases will be added. Will be tested in 3rd party CI setup.

Upgrades and Backwards Compatibility

None

Documentation Impact

Need to update iLO driver documentation for new management interface.

References

None

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baremetal-specs