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[85.214.156.166]) by gmr-mx.google.com with ESMTPS id a640c23a62f3a-c2080b35136si17607966b.3.2026.08.10.03.37.40 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 10 Aug 2026 03:37:41 -0700 (PDT) Received-SPF: pass (google.com: domain of amikan@ilbers.de designates 85.214.156.166 as permitted sender) client-ip=85.214.156.166; Received: from [127.0.0.1] (host-80-81-17-52.static.customer.m-online.net [80.81.17.52]) (authenticated bits=0) by shymkent.ilbers.de (8.15.2/8.15.2/Debian-8+deb9u1) with ESMTPSA id 67AAbcpr029767 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Aug 2026 12:37:39 +0200 Message-ID: <925c03a1-c68d-42e6-9587-5a4afb513b93@ilbers.de> Date: Mon, 10 Aug 2026 13:37:38 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] meta: Generate WSL image for Windows Subsystem for Linux To: Clara Kowalsky , isar-users@googlegroups.com Cc: florian.bezdeka@siemens.com References: <20260806070758.799362-1-clara.kowalsky@siemens.com> Content-Language: en-US, ru-RU From: Anton Mikanovich In-Reply-To: <20260806070758.799362-1-clara.kowalsky@siemens.com> Content-Type: text/plain; charset="UTF-8"; format=flowed X-Spam-Status: No, score=-4.6 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2, RCVD_IN_RP_CERTIFIED,RCVD_IN_RP_RNBL,RCVD_IN_RP_SAFE,SPF_PASS, URI_TRY_3LD autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on shymkent.ilbers.de X-Original-Sender: amikan@ilbers.de X-Original-Authentication-Results: gmr-mx.google.com; spf=pass (google.com: domain of amikan@ilbers.de designates 85.214.156.166 as permitted sender) smtp.mailfrom=amikan@ilbers.de Precedence: list Mailing-list: list isar-users@googlegroups.com; contact isar-users+owners@googlegroups.com List-ID: X-Spam-Checked-In-Group: isar-users@googlegroups.com X-Google-Group-Id: 914930254986 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-TUID: pADQEt3Oj0S9 06.08.2026 10:07, 'Clara Kowalsky' via isar-users wrote: > This allows to generate a wsl file for Windows Subsystem for Linux. > The wsl image class adapts the rootfs for WSL: It creates /dev/pts/ptmx > because WSL needs that node before devpts is mounted. Without it, early > boot fails with forkpty errors. The class also removes /etc/resolv.conf, > as WSL manages it itself. > See https://learn.microsoft.com/en-us/windows/wsl/build-custom-distro#configuration-file-recommendations > > The wsl-config recipe ships the configuration files /etc/wsl.conf and > /etc/wsl-distribution.conf as templates. > See https://learn.microsoft.com/en-us/windows/wsl/build-custom-distro#create-wsl-configuration-files > > The variables in the configuration files can be overwritten in > downstream layers: > - WSL_DEFAULT_USER specifies which user runs when the WSL distro is > launched. Default: "root" > - WSL_DEFAULT_UID specifies the default UID used during first-run/OOBE > installation. Default: "0" > - WSL_DEFAULT_NAME specifies the name that the distro is registered > under. Default: "${DISTRO}-${MACHINE}" > Whole configuration files can be replaced or added by bbappending the > wsl-config recipe. > > This was tested with WSL2, in plain Isar and in downstream layer. > > Signed-off-by: Clara Kowalsky > --- > doc/user_manual.md | 1 + > kas/machine/Kconfig | 8 ++++ > kas/machine/wsl.yaml | 7 +++ > meta-isar/conf/machine/wsl.conf | 16 +++++++ > meta-isar/conf/mc.conf | 2 + > meta-isar/conf/multiconfig/wsl-bookworm.conf | 7 +++ > meta-isar/conf/multiconfig/wsl-trixie.conf | 7 +++ > meta/classes-recipe/image.bbclass | 2 +- > meta/classes-recipe/imagetypes_wsl.bbclass | 48 +++++++++++++++++++ > .../wsl-config/files/etc/oobe.sh | 4 ++ > .../files/etc/wsl-distribution.conf.tmpl | 6 +++ > .../wsl-config/files/etc/wsl.conf.tmpl | 5 ++ > .../wsl-config/wsl-config_0.1.bb | 37 ++++++++++++++ > testsuite/citest.py | 2 + > 14 files changed, 151 insertions(+), 1 deletion(-) > create mode 100644 kas/machine/wsl.yaml > create mode 100644 meta-isar/conf/machine/wsl.conf > create mode 100644 meta-isar/conf/multiconfig/wsl-bookworm.conf > create mode 100644 meta-isar/conf/multiconfig/wsl-trixie.conf > create mode 100644 meta/classes-recipe/imagetypes_wsl.bbclass > create mode 100644 meta/recipes-support/wsl-config/files/etc/oobe.sh > create mode 100644 meta/recipes-support/wsl-config/files/etc/wsl-distribution.conf.tmpl > create mode 100644 meta/recipes-support/wsl-config/files/etc/wsl.conf.tmpl > create mode 100644 meta/recipes-support/wsl-config/wsl-config_0.1.bb > > diff --git a/doc/user_manual.md b/doc/user_manual.md > index dcc3f560..f3b1acb9 100644 > --- a/doc/user_manual.md > +++ b/doc/user_manual.md > @@ -514,6 +514,7 @@ Currently, the following image types are provided: > - `ubi` - image for use on mtd nand partitions employing UBI > - `ubifs` - raw UBI filesystem image, normally used together with UBI partitions > - `ova` - Open Virtual Appliance: image for use on VirtualBox or VMware > + - `wsl` - tar file for Windows Subsystem for Linux > - `squashfs` - raw squashfs filesystem image > - `fit` - FIT image as used by U-Boot > - `oci-archive`, `docker-archive`, `docker-daemon`, `containers-storage` - see [generating container images](#generate-container-image-with-root-filesystem) > diff --git a/kas/machine/Kconfig b/kas/machine/Kconfig > index 1e360be6..2895368c 100644 > --- a/kas/machine/Kconfig > +++ b/kas/machine/Kconfig > @@ -253,6 +253,13 @@ config MACHINE_HYPER_V > select CODENAME_TRIXIE > select ARCH_AMD64 > > +config MACHINE_WSL > + bool "wsl" > + select DISTRO_DEBIAN > + select CODENAME_BOOKWORM > + select CODENAME_TRIXIE > + select ARCH_AMD64 > + > config MACHINE_X86_PC > bool "x86 PC" > select DISTRO_DEBIAN > @@ -297,6 +304,7 @@ config KAS_INCLUDE_MACHINE > default "kas/machine/virtualbox.yaml" if MACHINE_VIRTUALBOX > default "kas/machine/vmware.yaml" if MACHINE_VMWARE > default "kas/machine/hyper-v-amd64.yaml" if MACHINE_HYPER_V > + default "kas/machine/wsl.yaml" if MACHINE_WSL > default "kas/machine/x86-pc.yaml" if MACHINE_X86_PC > > endmenu > diff --git a/kas/machine/wsl.yaml b/kas/machine/wsl.yaml > new file mode 100644 > index 00000000..f043b02a > --- /dev/null > +++ b/kas/machine/wsl.yaml > @@ -0,0 +1,7 @@ > +# This software is a part of Isar. > +# Copyright (c) Siemens AG, 2026 > + > +header: > + version: 14 > + > +machine: wsl > diff --git a/meta-isar/conf/machine/wsl.conf b/meta-isar/conf/machine/wsl.conf > new file mode 100644 > index 00000000..086b0fe1 > --- /dev/null > +++ b/meta-isar/conf/machine/wsl.conf > @@ -0,0 +1,16 @@ > +# This software is a part of Isar. > +# Copyright (C) Siemens AG, 2026 > +# > +# SPDX-License-Identifier: MIT > + > +DISTRO_ARCH ?= "amd64" > + > +# WSL uses the Windows-provided kernel > +KERNEL_NAME = "" We should probably don't set KERNEL_NAME at all, just like container machine does. And this also requires adding some hacks in meta-isar/conf/local.conf.sample > + > +IMAGE_FSTYPES ?= "wsl" > + > +# Configure rootfs for WSL boot > +IMAGE_INSTALL:append = " wsl-config" > +# Enable systemd-user session model > +IMAGE_PREINSTALL:append = " dbus dbus-user-session" > diff --git a/meta-isar/conf/mc.conf b/meta-isar/conf/mc.conf > index 649430a2..df3a38b0 100644 > --- a/meta-isar/conf/mc.conf > +++ b/meta-isar/conf/mc.conf > @@ -89,4 +89,6 @@ BBMULTICONFIG = " \ > qemuamd64-sid \ > qemuarm64-sid \ > qemuriscv64-resolute \ > + wsl-bookworm \ > + wsl-trixie \ > " Can you also run testsuite/targets_gen.py to update testsuite/data/targets.yml? > diff --git a/meta-isar/conf/multiconfig/wsl-bookworm.conf b/meta-isar/conf/multiconfig/wsl-bookworm.conf > new file mode 100644 > index 00000000..5e9f3697 > --- /dev/null > +++ b/meta-isar/conf/multiconfig/wsl-bookworm.conf > @@ -0,0 +1,7 @@ > +# This software is a part of Isar. > +# Copyright (C) Siemens AG, 2026 > +# > +# SPDX-License-Identifier: MIT > + > +MACHINE ?= "wsl" > +DISTRO ?= "debian-bookworm" > diff --git a/meta-isar/conf/multiconfig/wsl-trixie.conf b/meta-isar/conf/multiconfig/wsl-trixie.conf > new file mode 100644 > index 00000000..8ef796e4 > --- /dev/null > +++ b/meta-isar/conf/multiconfig/wsl-trixie.conf > @@ -0,0 +1,7 @@ > +# This software is a part of Isar. > +# Copyright (C) Siemens AG, 2026 > +# > +# SPDX-License-Identifier: MIT > + > +MACHINE ?= "wsl" > +DISTRO ?= "debian-trixie" > diff --git a/meta/classes-recipe/image.bbclass b/meta/classes-recipe/image.bbclass > index d02f99da..0329c3f8 100644 > --- a/meta/classes-recipe/image.bbclass > +++ b/meta/classes-recipe/image.bbclass > @@ -174,7 +174,7 @@ IMAGE_BASETYPES = "${@get_image_basetypes(d)}" > > # image types > IMAGE_CLASSES ??= "" > -IMGCLASSES = "imagetypes imagetypes_wic imagetypes_vm imagetypes_container squashfs \ > +IMGCLASSES = "imagetypes imagetypes_wic imagetypes_vm imagetypes_wsl imagetypes_container squashfs \ > imagetypes_ddi" > IMGCLASSES += "${IMAGE_CLASSES}" > inherit ${IMGCLASSES} > diff --git a/meta/classes-recipe/imagetypes_wsl.bbclass b/meta/classes-recipe/imagetypes_wsl.bbclass > new file mode 100644 > index 00000000..413c6a2d > --- /dev/null > +++ b/meta/classes-recipe/imagetypes_wsl.bbclass > @@ -0,0 +1,48 @@ > +# This software is a part of Isar. > +# Copyright (C) Siemens AG, 2026 > +# > +# SPDX-License-Identifier: MIT > + > +# This class allows to generate WSL import artifacts. > +# > + > +USING_WSL = "${@bb.utils.contains('IMAGE_BASETYPES', 'wsl', '1', '0', d)}" > + > +# WSL requires a static /dev/pts/ptmx during early boot > +ROOTFS_CONFIGURE_COMMAND += "${@bb.utils.contains('USING_WSL', '1', 'image_configure_wsl_ptmx', '', d)}" > + > +# The rootfs should not contain a /etc/resolv.conf > +# See https://learn.microsoft.com/en-us/windows/wsl/build-custom-distro#configuration-file-recommendations > +ROOTFS_POSTPROCESS_COMMAND += "${@bb.utils.contains('USING_WSL', '1', 'image_postprocess_wsl_cleanup', '', d)}" > +image_postprocess_wsl_cleanup[vardeps] += "WSL_CLEANUP_FILES" > + > +WSL_CLEANUP_FILES ?= " \ > + /etc/resolv.conf \ > +" > + > +IMAGE_TYPEDEP:wsl = "tar.gz" > + > +IMAGE_CMD:wsl() { > + cp -f "${DEPLOY_DIR_IMAGE}/${IMAGE_FULLNAME}.tar.gz" "${IMAGE_FILE_HOST}" > +} > + > +image_configure_wsl_ptmx() { > + run_privileged_heredoc <<'EOSUDO' > + set -e > + > + mkdir -p "${ROOTFSDIR}/dev/pts" > + if [ ! -e "${ROOTFSDIR}/dev/pts/ptmx" ]; then > + mknod -m 000 "${ROOTFSDIR}/dev/pts/ptmx" c 5 2 > + fi > +EOSUDO > +} > + > +image_postprocess_wsl_cleanup() { > + run_privileged_heredoc <<'EOSUDO' > + set -e > + > + for path in ${WSL_CLEANUP_FILES}; do > + rm -f "${ROOTFSDIR}${path}" > + done > +EOSUDO > +} > diff --git a/meta/recipes-support/wsl-config/files/etc/oobe.sh b/meta/recipes-support/wsl-config/files/etc/oobe.sh > new file mode 100644 > index 00000000..e9ddfd16 > --- /dev/null > +++ b/meta/recipes-support/wsl-config/files/etc/oobe.sh > @@ -0,0 +1,4 @@ > +#! /usr/bin/bash > + > +# Generic OOBE hook for Isar-generated WSL images > +exit 0 > diff --git a/meta/recipes-support/wsl-config/files/etc/wsl-distribution.conf.tmpl b/meta/recipes-support/wsl-config/files/etc/wsl-distribution.conf.tmpl > new file mode 100644 > index 00000000..4f83314b > --- /dev/null > +++ b/meta/recipes-support/wsl-config/files/etc/wsl-distribution.conf.tmpl > @@ -0,0 +1,6 @@ > +# See https://learn.microsoft.com/en-us/windows/wsl/build-custom-distro#add-the-wsl-distribution-configuration-file > + > +[oobe] > +command = /etc/oobe.sh > +defaultUid = ${WSL_DEFAULT_UID} > +defaultName = ${WSL_DEFAULT_NAME} > diff --git a/meta/recipes-support/wsl-config/files/etc/wsl.conf.tmpl b/meta/recipes-support/wsl-config/files/etc/wsl.conf.tmpl > new file mode 100644 > index 00000000..862ca252 > --- /dev/null > +++ b/meta/recipes-support/wsl-config/files/etc/wsl.conf.tmpl > @@ -0,0 +1,5 @@ > +[boot] > +systemd=true > + > +[user] > +default=${WSL_DEFAULT_USER} > diff --git a/meta/recipes-support/wsl-config/wsl-config_0.1.bb b/meta/recipes-support/wsl-config/wsl-config_0.1.bb > new file mode 100644 > index 00000000..2144c01b > --- /dev/null > +++ b/meta/recipes-support/wsl-config/wsl-config_0.1.bb > @@ -0,0 +1,37 @@ > +# This software is a part of Isar. > +# Copyright (C) Siemens AG, 2026 > +# > +# SPDX-License-Identifier: MIT > + > +inherit dpkg-raw > + > +DESCRIPTION = "WSL configuration files" > +MAINTAINER = "Clara Kowalsky " > + > +WSL_DEFAULT_USER ?= "root" > +WSL_DEFAULT_UID ?= "0" > +WSL_DEFAULT_NAME ?= "${DISTRO}-${MACHINE}" > + > +SRC_URI = " \ > + file://etc/oobe.sh \ > + file://etc/wsl.conf.tmpl \ > + file://etc/wsl-distribution.conf.tmpl \ > +" > + > +TEMPLATE_FILES = " \ > + etc/wsl.conf.tmpl \ > + etc/wsl-distribution.conf.tmpl \ > +" > +TEMPLATE_VARS += " \ > + WSL_DEFAULT_USER \ > + WSL_DEFAULT_UID \ > + WSL_DEFAULT_NAME \ > +" > + > +do_install[cleandirs] += "${D}/etc" > + > +do_install() { > + install -m 0644 "${WORKDIR}/etc/wsl.conf" "${D}/etc" > + install -m 0644 "${WORKDIR}/etc/wsl-distribution.conf" "${D}/etc" > + install -m 0755 "${WORKDIR}/etc/oobe.sh" "${D}/etc" > +} > diff --git a/testsuite/citest.py b/testsuite/citest.py > index a4f15d04..b13e27ed 100644 > --- a/testsuite/citest.py > +++ b/testsuite/citest.py > @@ -904,6 +904,8 @@ class NoCrossTest(CIBaseTest): > 'mc:qemuamd64-jammy:isar-image-base', > 'mc:qemuarm64-jammy:isar-image-base', > 'mc:x86-pc-bookworm:isar-image-base', > + 'mc:wsl-bookworm:isar-image-base', > + 'mc:wsl-trixie:isar-image-base', It's better to add a separate test case (just like for containers). > ] > > self.init() -- You received this message because you are subscribed to the Google Groups "isar-users" group. 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