192 lines
7.5 KiB
ReStructuredText
192 lines
7.5 KiB
ReStructuredText
==============
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Redfish driver
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==============
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Overview
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========
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The ``redfish`` driver enables managing servers compliant with the
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Redfish_ protocol.
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Prerequisites
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=============
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* The Sushy_ library should be installed on the ironic conductor node(s).
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For example, it can be installed with ``pip``::
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sudo pip install sushy
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Enabling the Redfish driver
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===========================
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#. Add ``redfish`` to the list of ``enabled_hardware_types``,
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``enabled_power_interfaces``, ``enabled_management_interfaces`` and
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``enabled_inspect_interfaces`` as well as ``redfish-virtual-media``
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to ``enabled_boot_interfaces`` in ``/etc/ironic/ironic.conf``.
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For example::
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[DEFAULT]
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...
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enabled_hardware_types = ipmi,redfish
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enabled_boot_interfaces = ipmitool,redfish-virtual-media
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enabled_power_interfaces = ipmitool,redfish
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enabled_management_interfaces = ipmitool,redfish
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enabled_inspect_interfaces = inspector,redfish
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#. Restart the ironic conductor service::
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sudo service ironic-conductor restart
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# Or, for RDO:
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sudo systemctl restart openstack-ironic-conductor
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Registering a node with the Redfish driver
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===========================================
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Nodes configured to use the driver should have the ``driver`` property
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set to ``redfish``.
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The following properties are specified in the node's ``driver_info``
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field:
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- ``redfish_address``: The URL address to the Redfish controller. It must
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include the authority portion of the URL, and can
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optionally include the scheme. If the scheme is
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missing, https is assumed.
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For example: https://mgmt.vendor.com. This is required.
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- ``redfish_system_id``: The canonical path to the ComputerSystem resource
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that the driver will interact with. It should include
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the root service, version and the unique resource
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path to the ComputerSystem. This property is only
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required if target BMC manages more than one
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ComputerSystem. Otherwise ironic will pick the only
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available ComputerSystem automatically. For
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example: /redfish/v1/Systems/1.
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- ``redfish_username``: User account with admin/server-profile access
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privilege. Although not required, it is highly
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recommended.
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- ``redfish_password``: User account password. Although not required, it is
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highly recommended.
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- ``redfish_verify_ca``: If redfish_address has the **https** scheme, the
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driver will use a secure (TLS_) connection when
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talking to the Redfish controller. By default
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(if this is not set or set to True), the driver
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will try to verify the host certificates. This
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can be set to the path of a certificate file or
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directory with trusted certificates that the
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driver will use for verification. To disable
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verifying TLS_, set this to False. This is optional.
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- ``redfish_auth_type``: Redfish HTTP client authentication method. Can be
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"basic", "session" or "auto".
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The "auto" mode first tries "session" and falls back
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to "basic" if session authentication is not supported
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by the Redfish BMC. Default is set in ironic config
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as ``[redfish]auth_type``.
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The ``openstack baremetal node create`` command can be used to enroll
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a node with the ``redfish`` driver. For example:
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.. code-block:: bash
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openstack baremetal node create --driver redfish --driver-info \
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redfish_address=https://example.com --driver-info \
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redfish_system_id=/redfish/v1/Systems/CX34R87 --driver-info \
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redfish_username=admin --driver-info redfish_password=password \
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--name node-0
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For more information about enrolling nodes see :ref:`enrollment`
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in the install guide.
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Features of the ``redfish`` hardware type
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=========================================
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Boot mode support
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^^^^^^^^^^^^^^^^^
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The ``redfish`` hardware type can read current boot mode from the
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bare metal node as well as set it to either Legacy BIOS or UEFI.
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.. note::
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Boot mode management is the optional part of the Redfish specification.
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Not all Redfish-compliant BMCs might implement it. In that case
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it remains the responsibility of the operator to configure proper
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boot mode to their bare metal nodes.
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Out-Of-Band inspection
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^^^^^^^^^^^^^^^^^^^^^^
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The ``redfish`` hardware type can inspect the bare metal node by querying
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Redfish compatible BMC. This process is quick and reliable compared to the
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way the ``inspector`` hardware type works i.e. booting bare metal node
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into the introspection ramdisk.
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.. note::
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The ``redfish`` inspect interface relies on the optional parts of the
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Redfish specification. Not all Redfish-compliant BMCs might serve the
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required information, in which case bare metal node inspection will fail.
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.. note::
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The ``local_gb`` property cannot always be discovered, for example, when a
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node does not have local storage or the Redfish implementation does not
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support the required schema. In this case the property will be set to 0.
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Virtual media boot
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^^^^^^^^^^^^^^^^^^
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The idea behind virtual media boot is that BMC gets hold of the boot image
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one way or the other (e.g. by HTTP GET, other methods are defined in the
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standard), then "inserts" it into node's virtual drive as if it was burnt
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on a physical CD/DVD. The node can then boot from that virtual drive into
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the operating system residing on the image.
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The major advantage of virtual media boot feature is that potentially
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unreliable TFTP image transfer phase of PXE protocol suite is fully
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eliminated.
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Hardware types based on the ``redfish`` fully support booting deploy/rescue
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and user images over virtual media. Ironic builds bootable ISO images, for
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either UEFI or BIOS (Legacy) boot modes, at the moment of node deployment out
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of kernel and ramdisk images associated with the ironic node.
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To boot a node managed by ``redfish`` hardware type over virtual media using
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BIOS boot mode, it suffice to set ironic boot interface to
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``redfish-virtual-media``, as opposed to ``ipmitool``.
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.. code-block:: bash
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openstack baremetal node set --boot-interface redfish-virtual-media node-0
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If UEFI boot mode is desired, the user should additionally supply EFI
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System Partition image (ESP_) via ``[driver-info]/bootloader`` ironic node
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property or ironic configuration file in form of Glance image UUID or a URL.
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.. code-block:: bash
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openstack baremetal node set --driver-info bootloader=<glance-uuid> node-0
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If ``[driver_info]/config_via_floppy`` boolean property of the node is set to
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``true``, ironic will create a file with runtime configuration parameters,
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place into on a FAT image, then insert the image into node's virtual floppy
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drive.
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When booting over PXE or virtual media, and user instance requires some
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specific kernel configuration, ``[instance_info]/kernel_append_params``
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property can be used to pass user-specified kernel command line parameters.
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For ramdisk kernel, ``[instance_info]/kernel_append_params`` property serves
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the same purpose.
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.. _Redfish: http://redfish.dmtf.org/
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.. _Sushy: https://opendev.org/openstack/sushy
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.. _TLS: https://en.wikipedia.org/wiki/Transport_Layer_Security
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.. _ESP: https://wiki.ubuntu.com/EFIBootLoaders#Booting_from_EFI
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