Re: [PATCH v13 1/2] meta/classes: Generate ova image for VMWare or Virtualbox

[Jan Kiszka <jan.kiszka@siemens.com>]

On 30.06.21 21:15, Q. Gylstorff wrote:
> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> 
> This allows to generate a ova file for virtualbox or vmware. The
> images differ in the setting of the variable `VMDK_SUBFORMAT`.
> - `streamOptimized` is used for Vmware Workstation
> - `monolithicSparse` is used for Virtualbox
> 
> This is necessary as virtualbox throws an import error for a `streamOptimized`
> version. The ova for Virtualbox is also bigger due the disk format.
> 
> The default machine settings are:
> - 4 CPU Cores with 8GB Ram
> 
> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> [Jan: shortened named, reformatting, massaged comments, added to local.conf]
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
>  doc/user_manual.md                            |   1 +
>  meta-isar/conf/local.conf.sample              |   1 +
>  meta-isar/conf/machine/virtualbox.conf        |  15 ++
>  meta-isar/conf/machine/vmware.conf            |  15 ++
>  .../multiconfig/virtualbox-ova-buster.conf    |   8 +
>  meta/classes/vm-img.bbclass                   | 124 ++++++++++++++
>  .../vm-template/files/vm-template.ovf.tmpl    | 155 ++++++++++++++++++
>  .../vm-template/vm-template_0.1.bb            |  16 ++
>  scripts/ci_build.sh                           |   1 +
>  9 files changed, 336 insertions(+)
>  create mode 100644 meta-isar/conf/machine/virtualbox.conf
>  create mode 100644 meta-isar/conf/machine/vmware.conf
>  create mode 100644 meta-isar/conf/multiconfig/virtualbox-ova-buster.conf
>  create mode 100644 meta/classes/vm-img.bbclass
>  create mode 100644 meta/recipes-devtools/vm-template/files/vm-template.ovf.tmpl
>  create mode 100644 meta/recipes-devtools/vm-template/vm-template_0.1.bb
> 
> diff --git a/doc/user_manual.md b/doc/user_manual.md
> index cf7dc2f..2f7df87 100644
> --- a/doc/user_manual.md
> +++ b/doc/user_manual.md
> @@ -454,6 +454,7 @@ Isar can generate various images types for specific machine. The type of the ima
>   - `rpi-sdimg` - A complete, partitioned Raspberry Pi SD card image (default option for the `rpi` machine).
>   - `wic-img` - A full disk image with user-specified partitions created and populated using the wic tool.
>   - `ubi-img` - A image for use on mtd nand partitions employing UBI
> + - `vm-img` - A image for use on VirtualBox or VMware
>  
>  ---
>  
> diff --git a/meta-isar/conf/local.conf.sample b/meta-isar/conf/local.conf.sample
> index 6cf1656..7b20a62 100644
> --- a/meta-isar/conf/local.conf.sample
> +++ b/meta-isar/conf/local.conf.sample
> @@ -64,6 +64,7 @@ BBMULTICONFIG = " \
>      nand-ubi-demo-buster \
>      nanopi-neo-buster \
>      stm32mp15x-buster \
> +    virtualbox-ova-buster \
>      rpi-stretch \
>      sifive-fu540-sid-ports \
>      qemuarm64-focal \
> diff --git a/meta-isar/conf/machine/virtualbox.conf b/meta-isar/conf/machine/virtualbox.conf
> new file mode 100644
> index 0000000..b20eaca
> --- /dev/null
> +++ b/meta-isar/conf/machine/virtualbox.conf
> @@ -0,0 +1,15 @@
> +# This software is a part of ISAR.
> +# Copyright (c) Siemens AG, 2020
> +#
> +# SPDX-License-Identifier: MIT
> +
> +DISTRO_ARCH ?= "amd64"
> +
> +KERNEL_NAME ?= "amd64"
> +
> +WKS_FILE ?= "sdimage-efi"
> +
> +IMAGER_INSTALL += "${GRUB_BOOTLOADER_INSTALL}"
> +
> +VMDK_SUBFORMAT = "monolithicSparse"
> +IMAGE_TYPE ?= "vm-img"
> diff --git a/meta-isar/conf/machine/vmware.conf b/meta-isar/conf/machine/vmware.conf
> new file mode 100644
> index 0000000..731559e
> --- /dev/null
> +++ b/meta-isar/conf/machine/vmware.conf
> @@ -0,0 +1,15 @@
> +# This software is a part of ISAR.
> +# Copyright (c) Siemens AG, 2020
> +#
> +# SPDX-License-Identifier: MIT
> +
> +DISTRO_ARCH ?= "amd64"
> +
> +KERNEL_NAME ?= "amd64"
> +
> +WKS_FILE ?= "sdimage-efi"
> +
> +IMAGER_INSTALL += "${GRUB_BOOTLOADER_INSTALL}"
> +
> +VMDK_SUBFORMAT = "streamOptimized"
> +IMAGE_TYPE ?= "vm-img"
> diff --git a/meta-isar/conf/multiconfig/virtualbox-ova-buster.conf b/meta-isar/conf/multiconfig/virtualbox-ova-buster.conf
> new file mode 100644
> index 0000000..3042556
> --- /dev/null
> +++ b/meta-isar/conf/multiconfig/virtualbox-ova-buster.conf
> @@ -0,0 +1,8 @@
> +#
> +# Copyright (c) Siemens AG, 2020
> +#
> +# SPDX-License-Identifier: MIT
> +
> +
> +MACHINE = "virtualbox"
> +DISTRO = "debian-buster"
> diff --git a/meta/classes/vm-img.bbclass b/meta/classes/vm-img.bbclass
> new file mode 100644
> index 0000000..46b9135
> --- /dev/null
> +++ b/meta/classes/vm-img.bbclass
> @@ -0,0 +1,124 @@
> +# This software is a part of ISAR.
> +# Copyright (C) 2019-2020 Siemens AG
> +#
> +# This class allows to generate images for VMware and VirtualBox
> +#
> +
> +inherit buildchroot
> +inherit wic-img
> +
> +IMAGER_BUILD_DEPS += "vm-template"
> +IMAGER_INSTALL += "qemu-utils gawk uuid-runtime vm-template"
> +
> +# virtual machine disk settings
> +SOURCE_IMAGE_FILE ?= "${IMAGE_FULLNAME}.wic.img"
> +
> +# For VirtualBox, this needs to be "monolithicSparse" (default to it).
> +# VMware needs this to be "streamOptimized".
> +VMDK_SUBFORMAT ?= "monolithicSparse"
> +
> +VIRTUAL_MACHINE_IMAGE_TYPE ?= "vmdk"
> +VIRTUAL_MACHINE_IMAGE_FILE = "${IMAGE_FULLNAME}-disk001.${VIRTUAL_MACHINE_IMAGE_TYPE}"
> +VIRTUAL_MACHINE_DISK = "${PP_DEPLOY}/${VIRTUAL_MACHINE_IMAGE_FILE}"
> +
> +def set_convert_options(d):
> +   format = d.getVar("VIRTUAL_MACHINE_IMAGE_TYPE")
> +   if format == "vmdk":
> +      return "-o subformat=%s" % d.getVar("VMDK_SUBFORMAT")
> +   else:
> +      return ""
> +
> +
> +CONVERSION_OPTIONS = "${@set_convert_options(d)}"
> +
> +do_convert_wic() {
> +    rm -f '${DEPLOY_DIR_IMAGE}/${VIRTUAL_MACHINE_IMAGE_FILE}'
> +    image_do_mounts
> +    bbnote "Creating ${VIRTUAL_MACHINE_IMAGE_FILE} from ${WIC_IMAGE_FILE}"
> +    sudo -E  chroot --userspec=$( id -u ):$( id -g ) ${BUILDCHROOT_DIR} \
> +    /usr/bin/qemu-img convert -f raw -O ${VIRTUAL_MACHINE_IMAGE_TYPE} ${CONVERSION_OPTIONS} \
> +        '${PP_DEPLOY}/${SOURCE_IMAGE_FILE}' '${PP_DEPLOY}/${VIRTUAL_MACHINE_IMAGE_FILE}'
> +    image_undo_mounts
> +}
> +
> +addtask convert_wic before do_build after do_wic_image do_copy_boot_files do_install_imager_deps do_transform_template
> +
> +# User settings for OVA
> +OVA_NAME ?= "${IMAGE_FULLNAME}"
> +OVA_MEMORY ?= "8192"
> +OVA_NUMBER_OF_CPU ?= "4"
> +OVA_VRAM ?= "64"
> +OVA_FIRMWARE ?= "efi"
> +OVA_ACPI ?= "true"
> +OVA_3D_ACCEL ?= "false"
> +OVA_CLIPBOARD ?= "bidirectional"
> +OVA_SHA_ALG = "1"
> +
> +# Generate random MAC addresses just as VirtualBox does, the format is
> +# their assigned prefix for the first 3 bytes followed by 3 random bytes.
> +VBOX_MAC_PREFIX = "080027"
> +
> +macgen() {
> +    hexdump -n3 -e "\"${VBOX_MAC_PREFIX}%06X\n\"" /dev/urandom
> +}
> +
> +get_disksize() {
> +    image_do_mounts
> +    sudo -E chroot --userspec=$( id -u ):$( id -g ) ${BUILDCHROOT_DIR} \
> +        qemu-img info -f vmdk "${VIRTUAL_MACHINE_DISK}" | gawk 'match($0, /^virtual size:.*\(([0-9]+) bytes\)/, a) {print a[1]}'

This lacks an unmout. But I would rather reorder the code so that
get_disksize is already under the mount the callers will do later on anyway.

Jan

> +}
> +
> +OVA_VARS = "OVA_NAME OVA_MEMORY OVA_NUMBER_OF_CPU OVA_VRAM \
> +            OVA_FIRMWARE OVA_ACPI OVA_3D_ACCEL OVA_CLIPBOARD \
> +            OVA_SHA_ALG VIRTUAL_MACHINE_IMAGE_FILE"
> +
> +# the ovf template is updated with ensubst
> +# this function adds the variable from OVA_VARS to the environment
> +python update_environment() {
> +    template_vars = (d.getVar('OVA_VARS', True) or "").split()
> +    if len(template_vars) == 0:
> +        return
> +
> +    for varname in template_vars:
> +        value = d.getVar(varname, True)
> +        if value:
> +            os.environ.update({varname: value})
> +}
> +
> +do_create_ova[prefuncs] += "update_environment"
> +do_create_ova() {
> +    if [ ! ${VIRTUAL_MACHINE_IMAGE_TYPE} = "vmdk" ]; then
> +        exit 0
> +    fi
> +    rm -f '${DEPLOY_DIR_IMAGE}/${OVA_NAME}.ova'
> +    rm -f '${DEPLOY_DIR_IMAGE}/${OVA_NAME}.ovf'
> +    rm -f '${DEPLOY_DIR_IMAGE}/${OVA_NAME}.mf'
> +
> +    export PRIMARY_MAC=$(macgen)
> +    export SECONDARY_MAC=$(macgen)
> +    export DISK_NAME=$(basename -s .vmdk ${VIRTUAL_MACHINE_DISK})
> +    export DISK_SIZE_BYTES=$(get_disksize)
> +    export LAST_CHANGE=$(date -u "+%Y-%m-%dT%H:%M:%SZ")
> +    export OVA_FIRMWARE_VIRTUALBOX=$(echo ${OVA_FIRMWARE} | tr '[a-z]' '[A-Z]')
> +
> +    image_do_mounts
> +
> +    sudo -Es chroot --userspec=$( id -u ):$( id -g ) ${BUILDCHROOT_DIR} <<'EOSUDO'
> +        export DISK_UUID=$(uuidgen)
> +        export VM_UUID=$(uuidgen)
> +        # create ovf
> +        cat /usr/share/vm-template/vm-template.ovf.tmpl | envsubst > ${PP_DEPLOY}/${OVA_NAME}.ovf
> +        tar -cvf ${PP_DEPLOY}/${OVA_NAME}.ova -C ${PP_DEPLOY} ${OVA_NAME}.ovf
> +
> +        # VirtualBox needs here a manifest file. VMware does accept that format.
> +        if [ "${VMDK_SUBFORMAT}" = "monolithicSparse" ]; then
> +            echo "SHA${OVA_SHA_ALG}(${VIRTUAL_MACHINE_IMAGE_FILE})=$(sha${OVA_SHA_ALG}sum ${PP_DEPLOY}/${VIRTUAL_MACHINE_IMAGE_FILE} | cut -d' ' -f1)" >> ${PP_DEPLOY}/${OVA_NAME}.mf
> +            echo "SHA${OVA_SHA_ALG}(${OVA_NAME}.ovf)=$(sha${OVA_SHA_ALG}sum ${PP_DEPLOY}/${OVA_NAME}.ovf | cut -d' ' -f1)" >> ${PP_DEPLOY}/${OVA_NAME}.mf
> +            tar -uvf ${PP_DEPLOY}/${OVA_NAME}.ova -C ${PP_DEPLOY} ${OVA_NAME}.mf
> +        fi
> +        tar -uvf ${PP_DEPLOY}/${OVA_NAME}.ova -C ${PP_DEPLOY} ${VIRTUAL_MACHINE_IMAGE_FILE}
> +EOSUDO
> +    image_undo_mounts
> +}
> +
> +addtask do_create_ova after do_convert_wic before do_deploy
> diff --git a/meta/recipes-devtools/vm-template/files/vm-template.ovf.tmpl b/meta/recipes-devtools/vm-template/files/vm-template.ovf.tmpl
> new file mode 100644
> index 0000000..e6b5305
> --- /dev/null
> +++ b/meta/recipes-devtools/vm-template/files/vm-template.ovf.tmpl
> @@ -0,0 +1,155 @@
> +<?xml version="1.0"?>
> +<Envelope ovf:version="1.0" xml:lang="en-US" xmlns="http://schemas.dmtf.org/ovf/envelope/1" xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1" xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData" xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:vbox="http://www.virtualbox.org/ovf/machine">
> +  <References>
> +    <File ovf:href="${VIRTUAL_MACHINE_IMAGE_FILE}" ovf:id="file1"/>
> +  </References>
> +  <DiskSection>
> +    <Info>List of the virtual disks used in the package</Info>
> +    <Disk ovf:capacity="${DISK_SIZE_BYTES}" ovf:diskId="vmdisk1" ovf:fileRef="file1" ovf:format="http://www.vmware.com/interfaces/specifications/vmdk.html#${VMDK_SUBFORMAT}" vbox:uuid="${DISK_UUID}"/>
> +  </DiskSection>
> +  <NetworkSection>
> +    <Info>Logical networks used in the package</Info>
> +    <Network ovf:name="NAT">
> +      <Description>Logical network used by this appliance.</Description>
> +    </Network>
> +  </NetworkSection>
> +  <VirtualSystem ovf:id="${OVA_NAME}">
> +    <Info>A virtual machine</Info>
> +    <OperatingSystemSection ovf:id="96">
> +      <Info>The kind of installed guest operating system</Info>
> +      <Description>Debian_64</Description>
> +      <vbox:OSType ovf:required="false">Debian_64</vbox:OSType>
> +    </OperatingSystemSection>
> +    <VirtualHardwareSection>
> +      <Info>Virtual hardware requirements for a virtual machine</Info>
> +      <System>
> +        <vssd:ElementName>Virtual Hardware Family</vssd:ElementName>
> +        <vssd:InstanceID>0</vssd:InstanceID>
> +        <vssd:VirtualSystemIdentifier>${OVA_NAME}</vssd:VirtualSystemIdentifier>
> +        <vssd:VirtualSystemType>virtualbox-2.2</vssd:VirtualSystemType>
> +      </System>
> +      <Item>
> +        <rasd:AllocationUnits>hertz * 10^6</rasd:AllocationUnits>
> +        <rasd:Caption>${OVA_NUMBER_OF_CPU} virtual CPU</rasd:Caption>
> +        <rasd:Description>Number of virtual CPUs</rasd:Description>
> +        <rasd:ElementName>${OVA_NUMBER_OF_CPU} virtual CPU</rasd:ElementName>
> +        <rasd:InstanceID>1</rasd:InstanceID>
> +        <rasd:ResourceType>3</rasd:ResourceType>
> +        <rasd:VirtualQuantity>${OVA_NUMBER_OF_CPU}</rasd:VirtualQuantity>
> +      </Item>
> +      <Item>
> +        <rasd:AllocationUnits>MegaBytes</rasd:AllocationUnits>
> +        <rasd:Caption>${OVA_MEMORY} MB of memory</rasd:Caption>
> +        <rasd:Description>Memory Size</rasd:Description>
> +        <rasd:ElementName>${OVA_MEMORY} MB of memory</rasd:ElementName>
> +        <rasd:InstanceID>2</rasd:InstanceID>
> +        <rasd:ResourceType>4</rasd:ResourceType>
> +        <rasd:VirtualQuantity>${OVA_MEMORY}</rasd:VirtualQuantity>
> +      </Item>
> +      <Item>
> +        <rasd:Address>0</rasd:Address>
> +        <rasd:Caption>ideController0</rasd:Caption>
> +        <rasd:Description>IDE Controller</rasd:Description>
> +        <rasd:ElementName>ideController0</rasd:ElementName>
> +        <rasd:InstanceID>3</rasd:InstanceID>
> +        <rasd:ResourceSubType>PIIX4</rasd:ResourceSubType>
> +        <rasd:ResourceType>5</rasd:ResourceType>
> +      </Item>
> +      <Item>
> +        <rasd:Address>1</rasd:Address>
> +        <rasd:Caption>ideController1</rasd:Caption>
> +        <rasd:Description>IDE Controller</rasd:Description>
> +        <rasd:ElementName>ideController1</rasd:ElementName>
> +        <rasd:InstanceID>4</rasd:InstanceID>
> +        <rasd:ResourceSubType>PIIX4</rasd:ResourceSubType>
> +        <rasd:ResourceType>5</rasd:ResourceType>
> +      </Item>
> +      <Item>
> +        <rasd:AutomaticAllocation>true</rasd:AutomaticAllocation>
> +        <rasd:Caption>Ethernet adapter on 'NAT'</rasd:Caption>
> +        <rasd:Connection>NAT</rasd:Connection>
> +        <rasd:ElementName>Ethernet adapter on 'NAT'</rasd:ElementName>
> +        <rasd:InstanceID>5</rasd:InstanceID>
> +        <rasd:ResourceSubType>E1000</rasd:ResourceSubType>
> +        <rasd:ResourceType>10</rasd:ResourceType>
> +      </Item>
> +      <Item>
> +        <rasd:AddressOnParent>0</rasd:AddressOnParent>
> +        <rasd:Caption>disk1</rasd:Caption>
> +        <rasd:Description>Disk Image</rasd:Description>
> +        <rasd:ElementName>disk1</rasd:ElementName>
> +        <rasd:HostResource>/disk/vmdisk1</rasd:HostResource>
> +        <rasd:InstanceID>6</rasd:InstanceID>
> +        <rasd:Parent>3</rasd:Parent>
> +        <rasd:ResourceType>17</rasd:ResourceType>
> +      </Item>
> +      <vmw:Config ovf:required="false" vmw:key="firmware" vmw:value="${OVA_FIRMWARE}"/>
> +      <vmw:Config ovf:required="false" vmw:key="tools.syncTimeWithHost" vmw:value="false"/>
> +      <vmw:Config ovf:required="false" vmw:key="tools.afterPowerOn" vmw:value="true"/>
> +      <vmw:Config ovf:required="false" vmw:key="tools.afterResume" vmw:value="true"/>
> +      <vmw:Config ovf:required="false" vmw:key="tools.beforeGuestShutdown" vmw:value="true"/>
> +      <vmw:Config ovf:required="false" vmw:key="tools.beforeGuestStandby" vmw:value="true"/>
> +      <vmw:ExtraConfig ovf:required="false" vmw:key="virtualHW.productCompatibility" vmw:value="hosted"/>
> +      </VirtualHardwareSection>
> +      <vbox:Machine ovf:required="false" version="1.12-linux" uuid="{${VM_UUID}}" name="${OVA_NAME}" OSType="Debian_64" snapshotFolder="Snapshots" lastStateChange="${LAST_CHANGE}">
> +        <ovf:Info>Complete VirtualBox machine configuration in VirtualBox format</ovf:Info>
> +        <Hardware>
> +          <CPU count="${OVA_NUMBER_OF_CPU}">
> +            <PAE enabled="true"/>
> +            <HardwareVirtExLargePages enabled="false"/>
> +          </CPU>
> +          <Memory RAMSize="${OVA_MEMORY}"/>
> +          <Firmware type="${OVA_FIRMWARE_VIRTUALBOX}"/>
> +          <Boot>
> +            <Order position="1" device="HardDisk"/>
> +            <Order position="2" device="None"/>
> +            <Order position="3" device="None"/>
> +            <Order position="4" device="None"/>
> +          </Boot>
> +          <Display VRAMSize="${OVA_VRAM}" monitorCount="1" accelerate3D="${OVA_3D_ACCEL}" accelerate2DVideo="false"/>
> +          <VideoRecording enabled="false" file="Test.webm" horzRes="640" vertRes="480"/>
> +          <RemoteDisplay enabled="false" authType="Null"/>
> +          <BIOS>
> +            <IOAPIC enabled="${OVA_ACPI}"/>
> +          </BIOS>
> +          <USBController enabled="false" enabledEhci="false"/>
> +          <Network>
> +            <Adapter slot="0" enabled="true" MACAddress="${PRIMARY_MAC}" cable="true" speed="0" type="virtio">
> +              <DisabledModes/>
> +              <NAT>
> +                <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
> +                <Alias logging="false" proxy-only="false" use-same-ports="false"/>
> +              </NAT>
> +            </Adapter>
> +          </Network>
> +          <LPT>
> +            <Port slot="1" enabled="false" IOBase="0x378" IRQ="7"/>
> +          </LPT>
> +          <AudioAdapter driver="Pulse" enabled="false"/>
> +          <RTC localOrUTC="local"/>
> +          <SharedFolders/>
> +          <Clipboard mode="Disabled"/>
> +          <DragAndDrop mode="Disabled"/>
> +          <IO>
> +            <IoCache enabled="true" size="5"/>
> +            <BandwidthGroups/>
> +          </IO>
> +          <HostPci>
> +            <Devices/>
> +          </HostPci>
> +          <EmulatedUSB>
> +            <CardReader enabled="false"/>
> +          </EmulatedUSB>
> +          <Guest memoryBalloonSize="0"/>
> +          <GuestProperties/>
> +        </Hardware>
> +        <StorageControllers>
> +          <StorageController name="IDE Controller" type="PIIX4" PortCount="2" useHostIOCache="true" Bootable="true">
> +            <AttachedDevice type="HardDisk" port="0" device="0">
> +              <Image uuid="{${DISK_UUID}}"/>
> +            </AttachedDevice>
> +          </StorageController>
> +        </StorageControllers>
> +      </vbox:Machine>
> +  </VirtualSystem>
> +</Envelope>
> diff --git a/meta/recipes-devtools/vm-template/vm-template_0.1.bb b/meta/recipes-devtools/vm-template/vm-template_0.1.bb
> new file mode 100644
> index 0000000..1d474cd
> --- /dev/null
> +++ b/meta/recipes-devtools/vm-template/vm-template_0.1.bb
> @@ -0,0 +1,16 @@
> +# This software is a part of ISAR.
> +#
> +# Copyright (c) Siemens AG, 2020
> +#
> +# SPDX-License-Identifier: MIT
> +
> +inherit dpkg-raw
> +
> +SRC_URI += "file://vm-template.ovf.tmpl"
> +
> +do_install() {
> +    TARGET=${D}/usr/share/vm-template
> +    install -m 0755 -d ${TARGET}
> +    install -m 0740 ${WORKDIR}/vm-template.ovf.tmpl \
> +        ${TARGET}/vm-template.ovf.tmpl
> +}
> diff --git a/scripts/ci_build.sh b/scripts/ci_build.sh
> index 49d6aa8..b1bbe51 100755
> --- a/scripts/ci_build.sh
> +++ b/scripts/ci_build.sh
> @@ -43,6 +43,7 @@ TARGETS_SET="\
>              mc:nand-ubi-demo-buster:isar-image-ubi \
>              mc:rpi-stretch:isar-image-base \
>              mc:qemuamd64-focal:isar-image-base \
> +            mc:virtualbox-ova-buster:isar-image-base \
>              "
>            # qemu-user-static of <= buster too old to build that
>            # mc:qemuarm64-buster:isar-image-base
> 

-- 
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Corporate Competence Center Embedded Linux