Documentation: migration guide from inspector
Change-Id: I622085adc431555789921f04b5ba2375f806075e
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Dmitry Tantsur
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@ -22,12 +22,14 @@ ironic-inspector_ service.
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.. _ironic-inspector: https://pypi.org/project/ironic-inspector
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.. toctree::
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:maxdepth: 2
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managed
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data
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hooks
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discovery
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pxe_filter
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migration
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Configuration
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-------------
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164
doc/source/admin/inspection/migration.rst
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164
doc/source/admin/inspection/migration.rst
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Migrating from ironic-inspector
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===============================
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This document outlines the process of migrating from a separate
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ironic-inspector_ service to the built-in :doc:`in-band inspection <index>`.
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.. note::
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This is a live document that is updated as more ironic-inspector features
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are supported in ironic. If you're upgrading to a branch other than
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``master``, use the version of this document from the target branch.
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.. _ironic-inspector: https://docs.openstack.org/ironic-inspector/
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Understand the feature differences
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----------------------------------
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Removed
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~~~~~~~
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Some rarely used or controversial features have not been migrated to ironic.
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This list currently includes:
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* `Retrieving unprocesses inspection data
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<https://docs.openstack.org/api-ref/baremetal-introspection/#get-unprocessed-introspection-data>`_
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* `Reapplying the processing pipeline on new data
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<https://docs.openstack.org/api-ref/baremetal-introspection/#reapply-introspection-on-data>`_
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* :doc:`discovery` is no longer based on plug-ins.
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* Introspection of nodes in the ``active`` provision state.
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* PXE filters based on ``iptables``
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:ironic-inspector-doc:`Inspection rules <user/usage.html#introspection-rules>`
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are also currently not implemented but are planned for the 2024.2 release or
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later.
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New defaults
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~~~~~~~~~~~~
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* The database :oslo.config:option:`data storage backend
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<inventory.data_backend>` is used by default.
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* The list of :oslo.config:option:`default hooks <inspector.default_hooks>` is
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limited to only most commonly used ones (see also `Built-in hooks`_).
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Built-in hooks
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~~~~~~~~~~~~~~
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Most of the :ironic-inspector-doc:`introspection hooks
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<user/usage.html#plugins>` have been :doc:`migrated to ironic <hooks>`,
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although many have been migrated for clarity and consistency.
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.. list-table:: Hooks mapping
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:header-rows: 1
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* - Inspector
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- ironic
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- ``default_hooks``?
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- Notes
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* - ``accelerators``
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- ``accelerators``
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- No
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-
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* - ``capabilities``
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- ``boot-mode``, ``cpu-capabilities``
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- No
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- Split into two logical parts.
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* - ``extra_hardware``
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- ``extra-hardware``
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- No
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- python-hardware_ is not actively maintained any more.
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* - ``lldp_basic``
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- ``parse-lldp``
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- No
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-
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* - ``local_link_connection``
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- ``local-link-connection``
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- No
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-
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* - ``pci_devices``
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- ``pci-devices``
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- No
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-
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* - ``physnet_cidr_map``
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- ``physical-network``
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- No
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-
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* - ``raid_device``
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- ``raid-device``
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- No
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-
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* - ``root_device``
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- ``root-device``
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- No
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-
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* - ``ramdisk_error``
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- ``ramdisk-error``
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- **Yes**
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-
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* - ``scheduler``
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- ``architecture``, ``memory``
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- Only ``architecture``
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- Split, dropped ``local_gb`` and ``vcpus`` support.
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* - ``validate_interfaces``
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- ``validate-interfaces``, ``ports``
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- **Yes**
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- Split into two logical parts.
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.. _python-hardware: https://github.com/redhat-cip/hardware
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Custom hooks
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~~~~~~~~~~~~
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A custom hook (called *processing hook* in ironic-inspector) has to be
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derived from the base class :py:class:`InspectionHook
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<ironic.drivers.modules.inspector.hooks.base.InspectionHook>`. It differs
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from the older :ironic-inspector-doc:`ProcessingHook
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<contributor/api/ironic_inspector.plugins.base.html#ironic_inspector.plugins.base.ProcessingHook>`
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in a few important ways, requiring custom hooks to be adapted for ironic:
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* Hooks operate on the regular :py:class:`task
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<ironic.conductor.task_manager.TaskManager>` instead of the
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inspector-specific ``NodeInfo`` object.
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* Since changes to nodes and ports no longer require an API call, hooks are
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expected to commit their changes immediately rather than letting them
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accumulate on the task object.
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* The hook methods have been renamed: ``before_processing`` is called
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``preprocess``, the ``__call__`` method is used instead of
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``before_update``.
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* *Introspection data* has been split into its *inventory* part and *plugin
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data*. Hooks should not update the inventory.
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* New hooks use the entry point ``ironic.inspection.hooks`` instead of
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``ironic_inspector.hooks.processing``.
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Other concerns
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~~~~~~~~~~~~~~
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* There is no way to migrate the inspection data automatically. You need to
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repeat inspections or copy the data over manually.
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Migration process
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-----------------
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1. Make sure you're running at ironic 2024.1 or newer.
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2. Enable the new inspection implementation as described in :doc:`index`.
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3. Carefully research options in the :oslo.config:group:`inventory` and
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:oslo.config:group:`inspector` sections. Update options to match similar
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ones in the ironic-inspector configuration.
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4. Enable the required `Built-in hooks`_, taking into the account the new names
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and composition.
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5. If using network boot and *unmanaged* inspection or auto-discovery,
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:ref:`configure unmanaged boot <configure-unmanaged-inspection>`.
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6. If using the OpenStack Networking, consider configuring (but not starting
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yet) the :doc:`pxe_filter`.
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7. Make sure no inspection are running.
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8. Stop ironic-inspector or at least disable its PXE filter (it may conflict
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with the one used here).
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9. Start :doc:`pxe_filter` if needed. Restart the Bare Metal service.
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10. Change all nodes to use the new inspection interface, for example:
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.. code-block:: bash
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baremetal node list --fields uuid inspect_interface -f value | while read uuid iface; do
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if [ "$iface" = "inspector" ]; then
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baremetal node set --inspect-interface agent "$uuid"
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fi
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done
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@ -57,6 +57,10 @@ apidoc_excluded_paths = [
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]
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apidoc_separate_modules = True
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autodoc_default_options = {
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'special-members': '__call__',
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}
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openstackdocs_repo_name = 'openstack/ironic'
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openstackdocs_use_storyboard = False
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openstackdocs_pdf_link = True
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