271dc36f33
s390x architecture uses zipl as bootloader. When used in combination
with the vm element it replaces the existing bootloader element.
It's mandatory for s390x vm images.
Use cases
---------
* Allow users to create s390x images that run on nova with s390x
libvirt/kvm backend
* Building nodepool images for s390x third party CI
Supported Distros
-----------------
The following listing shows all Distros that officially support
s390x and how those Distros are supported in DIB with this patch.
* SLES - not supported (SLES is not supported in DIB)
* RHEL - not suppoprted (RHEL is not supported as KVM guest on s390x,
therefore there's no rhel7 qcow image for s390x available
like it is for other archictectures)
* Ubuntu - supported
Ubuntu images can for example be built using the following commands:
$ disk-image-create ubuntu-minimal zipl vm
$ disk-image-create ubuntu-minimal zipl
$ disk-image-create ubuntu zipl vm
Testing
-------
Cross architecture building of s390x images is not supported so far.
The plan is to set up a ThirdParty CI that builds the image for s390x and
provides the logs.
Co-Authored-By: Andreas Scheuring <andreas.scheuring@de.ibm.com>
Co-Authored-By: Holger Smolinsky <holger@smolinski.name>
Co-Authored-By: Zhiguo Deng <bjzgdeng@linux.vnet.ibm.com>
Co-Authored-By: Arne Recknagel <arne.recknagel@hotmail.com>
Closes-Bug: #1730641
Change-Id: I576e7edda68da12e97c60af38f457915efe7b934
70 lines
2 KiB
Bash
Executable file
70 lines
2 KiB
Bash
Executable file
#!/bin/bash
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# Copyright (c) 2017 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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#
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Configure zipl.
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if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
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set -x
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fi
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set -eu
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set -o pipefail
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# get the device containing the /boot directory
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base_device=`df /boot --output=source | grep "/dev/*"`
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cat > /lib/s390-tools/zipl_helper.loop <<EOF
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#!/bin/bash
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# This helper file is only required during image build if DIB is
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# called without any partitioning configured (e.g. without the "vm"
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# element). In that case the file system is put on a plain loop
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# device.
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#
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# It's not required if
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# * zipl is executed in in a running VM.
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# * DIB is configured to create partitions (e.g. with the "vm"
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# element).
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#
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# In both cases the disks block layout can be determined by
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# the operating system shipped zipl_helper.device-mapper file.
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echo "targetbase=${base_device}"
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echo "targettype=scsi"
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# DIB only supports 512 Byte disk sectors and blocks (not to confuse
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# with filesystem block size which is 4k by default)
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echo "targetblocksize=512"
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# If no partitions are present, no MBR is present - the file system can start
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# at block 0
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echo "targetoffset=0"
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EOF
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chmod +x /lib/s390-tools/zipl_helper.loop
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cat > /etc/zipl.conf <<EOF
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# This has been modified by the cloud image build process
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[defaultboot]
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default=ubuntu
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[ubuntu]
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target = /boot
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image = /boot/vmlinuz
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ramdisk = /boot/initrd.img
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parameters="root=LABEL=${DIB_ROOT_LABEL} $DIB_ZIPL_DEFAULT_CMDLINE"
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EOF
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zipl -V
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rm -f /lib/s390-tools/zipl_helper.loop
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