8deae0ce74
This updates the template to ask about microversions, as well as creating the liberty/ dir with a placeholder spec which should be removed once we have merged an approved spec for Liberty. Additionally, all specs from Kilo that were not implemented have been archived. If they wish to be revived for Liberty, a separate merge request should be issued moving them into liberty/. Change-Id: I839b478a67af9eab3bfefbf979227e5f49b01aed
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3.7 KiB
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175 lines
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This work is licensed under a Creative Commons Attribution 3.0 Unported
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License.
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http://creativecommons.org/licenses/by/3.0/legalcode
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==========================================
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Partition image support for agent driver
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==========================================
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https://blueprints.launchpad.net/ironic/+spec/partition-image-support-for-agent-driver
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This blueprint suggests to enhance agent driver to support deploy partition
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images with subsequent boot to happen over pxe or vmedia as specified by
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the driver.
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Problem description
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===================
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As of now agent driver support only whole disk images that can be deployed on
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the baremetal. With disk image based deploy, the subsequent boot will happen
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from the local hard drive. Ironic does not have control over the subsequent
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boots of the provisioned baremetal node.
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Proposed change
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===============
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* Agent driver validate the specified image type is of partition image(raw) by
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looking for kernel_id and ramdisk_id image properties.
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* Send partition information(root, swap, etc) to the agent ramdisk through
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image_info.
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* Upon receiving the partition information, agent ramdisk will work on the
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given os_install disk and copy the partition image in the root partition.
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* Agent ramdisk sends back the root_uuid to the agent driver on the
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controller.
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* Post deploy, agent driver prepares the config for subsequent boot, either
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using pxe or vmedia as defined by the driver. Both agent_ipmitool and
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agent_ilo driver should support deploy with parition images.
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* Factor out the partitioning code from ironic into a different library
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and use it in both IPA and ironic code base.
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Alternatives
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------------
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We can use iscsi method to write partition image on to the target disk.
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We need agent ramdisk to support iscsi, similar to the ironic DIB element.
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Data model impact
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-----------------
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None.
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REST API impact
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---------------
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None.
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RPC API impact
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--------------
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None.
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Driver API impact
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-----------------
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None.
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Nova driver impact
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------------------
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None.
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Security impact
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---------------
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None.
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Other end user impact
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---------------------
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Ability to deploy partition images on nodes managed by the agent.
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Scalability impact
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------------------
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None.
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Performance Impact
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------------------
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None.
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Other deployer impact
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---------------------
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None.
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Developer impact
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----------------
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None.
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Implementation
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==============
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Assignee(s)
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-----------
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Primary assignee:
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faizan-barmawer
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Other contributors:
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None
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Work Items
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----------
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* Factor out the partitioning code from ironic into a common library
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for both IPA and ironic code base.
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1. Move the disk partition code from ironic/common to an oslo incubator
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project as oslo.libironic
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- ironic/common/disk_partitioner.py
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- Some common disk related functions from
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ironic/drivers/modules/deploy_utils.py
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- Related test cases.
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2. Use oslo.libironic in IPA
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* Make necessary changes in agent driver common code, such as validate,
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deploy, etc.
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* Make necessary changes in agent_ipmitool driver to generate correct
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pxe config for subsequent reboot.
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* Make necessary changes in agent_ilo driver to generate iso for subsequent
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reboot.
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* Make changes in IPA (agent ramdisk) to recognize the incoming image
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information and take appropriate action to deploy partition image on the
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disk.
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Dependencies
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============
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Testing
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=======
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* Unit testing with partition images with agent_ilo and agent_ipmitool drivers.
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* Add specific agent driver test cases with partition images in
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tempest/devstack.
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Upgrades and Backwards Compatibility
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====================================
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Documentation Impact
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====================
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* Make changes to ironic install guide.
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References
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==========
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