Merge "Deprecate syslinux"
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Zuul
Gerrit Code Review
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7673cb827b
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@ -169,71 +169,6 @@ the PXE UEFI environment.
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for them. Please check :doc:`../admin/drivers` for information on whether
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your driver requires manual UEFI configuration.
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Legacy BIOS - Syslinux setup
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----------------------------
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In order to deploy instances with PXE on bare metal using Legacy BIOS boot
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mode, perform these additional steps on the ironic conductor node.
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#. Install the syslinux package with the PXE boot images:
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Ubuntu (16.04LTS and later)::
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sudo apt-get install syslinux-common pxelinux
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RHEL8/CentOS8/Fedora::
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sudo dnf install syslinux-tftpboot
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SUSE::
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sudo zypper install syslinux
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#. Copy the PXE image to ``/tftpboot``. The PXE image might be found at [1]_:
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Ubuntu (16.04LTS and later)::
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sudo cp /usr/lib/PXELINUX/pxelinux.0 /tftpboot
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RHEL8/CentOS8/SUSE::
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sudo cp /usr/share/syslinux/pxelinux.0 /tftpboot
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#. If whole disk images need to be deployed via PXE-netboot, copy the
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chain.c32 image to ``/tftpboot`` to support it:
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Ubuntu (16.04LTS and later)::
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sudo cp /usr/lib/syslinux/modules/bios/chain.c32 /tftpboot
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Fedora::
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sudo cp /boot/extlinux/chain.c32 /tftpboot
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RHEL8/CentOS8/SUSE::
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sudo cp /usr/share/syslinux/chain.c32 /tftpboot/
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#. If the version of syslinux is **greater than** 4 we also need to make sure
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that we copy the library modules into the ``/tftpboot`` directory [2]_
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[1]_. For example, for Ubuntu run::
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sudo cp /usr/lib/syslinux/modules/*/ldlinux.* /tftpboot
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#. Update the bare metal node with ``boot_mode:bios`` capability in
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node's properties field. See :ref:`boot_mode_support` for details.
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#. Make sure that bare metal node is configured to boot in Legacy BIOS boot mode
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and boot device is set to network/pxe.
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.. [1] On **Fedora/RHEL** the ``syslinux-tftpboot`` package already installs
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the library modules and PXE image at ``/tftpboot``. If the TFTP server
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is configured to listen to a different directory you should copy the
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contents of ``/tftpboot`` to the configured directory
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.. [2] http://www.syslinux.org/wiki/index.php/Library_modules
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iPXE setup
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----------
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@ -438,18 +373,18 @@ instead.
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In the following example, since 'x86' and 'x86_64' keys are not in the
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``pxe_bootfile_name_by_arch`` or ``pxe_config_template_by_arch`` options, x86
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and x86_64 nodes will be deployed by 'pxelinux.0' or 'bootx64.efi', depending
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and x86_64 nodes will be deployed by 'undionly.kpxe' or 'bootx64.efi', depending
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on the node's ``boot_mode`` capability ('bios' or 'uefi'). However, aarch64
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nodes will be deployed by 'grubaa64.efi', and ppc64 nodes by 'bootppc64'::
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[pxe]
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# Bootfile DHCP parameter. (string value)
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pxe_bootfile_name=pxelinux.0
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pxe_bootfile_name=undionly.kpxe
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# On ironic-conductor node, template file for PXE
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# configuration. (string value)
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pxe_config_template = $pybasedir/drivers/modules/pxe_config.template
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pxe_config_template = $pybasedir/drivers/modules/ipxe_config.template
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# Bootfile DHCP parameter for UEFI boot mode. (string value)
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uefi_pxe_bootfile_name=bootx64.efi
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@ -478,6 +413,12 @@ nodes will be deployed by 'grubaa64.efi', and ppc64 nodes by 'bootppc64'::
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iPXE based deployment, and defaults to the same behavior as the comperable
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``[pxe]pxe_bootfile_by_arch`` setting for standard PXE.
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.. note::
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When booting PowerPC based machines, the firmware loader directly boots
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a kernel and ramdisk. It explicitly reads a "pxelinux" style template,
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and then directly retrieves the files defined in the file without a
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"network boot program".
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PXE timeouts tuning
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-------------------
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@ -83,8 +83,8 @@ through the steps involved during the provisioning of a bare metal instance.
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These pre-requisites must be met before the deployment process:
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* Dependent packages to be configured on the Bare Metal service node(s)
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where ironic-conductor is running like tftp-server, ipmi, syslinux etc for
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bare metal provisioning.
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where ironic-conductor is running like tftp-server, ipmi, grub/ipxe, etc
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for bare metal provisioning.
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* Nova must be configured to make use of the bare metal service endpoint
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and compute driver should be configured to use ironic driver on the Nova
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compute node(s).
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@ -0,0 +1,26 @@
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---
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deprecations:
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- |
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Support for the `syslinux <https://wiki.syslinux.org/wiki/index.php?title=Syslinux_6_Changelog#Changes_in_6.04>`_
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and the often separately package `isolinux <https://wiki.syslinux.org/wiki/index.php?title=ISOLINUX>`_
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and `pxelinux <https://wiki.syslinux.org/wiki/index.php?title=PXELINUX>`_.
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Legacy BIOS boot loaders, is deprecated and will be removed the future.
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This is for two reasons. The first is because it is a BIOS mode bootloader,
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and the shift to UEFI booting has reduced the need for these packages.
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The second reason is a lack of maintenance, which is ultimately the same
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reason Linux distributions are discussing dropping support and packaging.
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Syslinux has not been updated since `2019 <https://repo.or.cz/syslinux.git/shortlog>`_.
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Incidently, the file format it utilizes *is* supported by Power hardware,
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and that may result in the configuration template remaining in Ironic for
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the forseeable future.
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- Support for use of `pxelinux <https://wiki.syslinux.org/wiki/index.php?title=PXELINUX>`_
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is deprecated due to the deprecation of support for Syslinux.
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- Support for virtual media booting with x86 Hardware in Legacy BIOS mode is
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deprecated due to the dependency upon
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`isolinux <https://wiki.syslinux.org/wiki/index.php?title=ISOLINUX>`_
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for use of Legacy BIOS boot mode. ``isolinux`` is from the ``syslinux``
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package and source tree.
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- Deprecation of ``pxelinux``, as a result of the deprecation of ``syslinux``,
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does ultimately mean the default for the ``pxe`` boot_interface to carry
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defaults for the use of grub based network booting, specifically for
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for operators who are unable to use iPXE.
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