osbuild: support building kubevirt disks

src/cmd-osbuild

@@ -19,6 +19,7 @@ declare -A SUPPORTED_PLATFORMS=(
     ['hetzner']='raw'
     ['hyperv']='vhdx'
     ['ibmcloud']='qcow2'
+    ['kubevirt']='ociarchive'
     ['metal4k']='raw'
     ['metal']='raw'
     ['nutanix']='qcow2'
@@ -222,6 +223,7 @@ generate_runvm_osbuild_config() {
     # Generate the JSON describing the disk we want to build
     yaml2json /dev/stdin "${runvm_osbuild_config_json}" <<EOF
 artifact-name-prefix: "${name}-${build}"
+build-version: "${build}"
 container-imgref: "${container_imgref}"
 deploy-via-container: "${deploy_via_container}"
 osname: "${name}"
@@ -266,6 +268,7 @@ main() {
         "cmd-buildextend-hetzner") platforms=(hetzner);;
         "cmd-buildextend-hyperv") platforms=(hyperv);;
         "cmd-buildextend-ibmcloud") platforms=(ibmcloud);;
+        "cmd-buildextend-kubevirt") platforms=(kubevirt);;
         "cmd-buildextend-nutanix") platforms=(nutanix);;
         "cmd-buildextend-openstack") platforms=(openstack);;
         "cmd-buildextend-vultr") platforms=(vultr);;
@@ -409,7 +412,7 @@ main() {
 
         # Perform postprocessing
         case "$platform" in
-            gcp|nutanix)
+            gcp|kubevirt|nutanix)
                 # Update the meta.json and builddir with the generated artifact.
                 # Skip Compression on these platforms as they are either already
                 # compressed or the artifact itself has internal compression enabled.

src/osbuild-manifests/coreos.osbuild.x86_64.mpp.yaml

@@ -796,6 +796,8 @@ pipelines:
       path: platform.hyperv.ipp.yaml
   - mpp-import-pipelines:
       path: platform.ibmcloud.ipp.yaml
+  - mpp-import-pipelines:
+      path: platform.kubevirt.ipp.yaml
   - mpp-import-pipelines:
       path: platform.openstack.ipp.yaml
   - mpp-import-pipelines:

src/osbuild-manifests/platform.kubevirt.ipp.yaml

@@ -0,0 +1,107 @@
+# This file defines the artifact to be used for the kubevirt platform.
+version: '2'
+mpp-vars:
+  build_version: $build_version
+pipelines:
+  - name: raw-kubevirt-image
+    build:
+      mpp-format-string: '{buildroot}'
+    stages:
+      - type: org.osbuild.copy
+        inputs:
+          tree:
+            type: org.osbuild.tree
+            origin: org.osbuild.pipeline
+            references:
+              - name:raw-image
+        options:
+          paths:
+            - from: input://tree/disk.img
+              to: tree:///disk.img
+      # Increase the size to the cloud image size
+      - type: org.osbuild.truncate
+        options:
+          filename: disk.img
+          size:
+            mpp-format-string: "{cloud_image_size_mb * 1024 * 1024}"
+      - type: org.osbuild.coreos.platform
+        options:
+          platform: kubevirt
+        devices:
+          disk:
+            type: org.osbuild.loopback
+            options:
+              filename: disk.img
+              partscan: true
+        mounts:
+           - name: root
+             type: org.osbuild.xfs
+             source: disk
+             partition:
+               mpp-format-int: '{image.layout[''root''].partnum}'
+             target: /
+           - name: ostree.deployment
+             type: org.osbuild.ostree.deployment
+             options:
+               source: mount
+               deployment:
+                 default: true
+           - name: boot
+             type: org.osbuild.ext4
+             source: disk
+             partition:
+               mpp-format-int: '{image.layout[''boot''].partnum}'
+             target: /boot
+  - name: qemu-kubevirt-image
+    build:
+      mpp-format-string: '{host_as_buildroot}'
+    stages:
+      # Kubevirt looks for the disk/qcow2 file under the /disk directory.
+      - type: org.osbuild.mkdir
+        options:
+          paths:
+            - path: /disk
+              mode: 493
+      - type: org.osbuild.qemu
+        inputs:
+          image:
+            type: org.osbuild.files
+            origin: org.osbuild.pipeline
+            references:
+              name:raw-kubevirt-image:
+                file: disk.img
+        options:
+          filename:
+            mpp-format-string: '/disk/{artifact_name_prefix}-kubevirt.{arch}.qcow2'
+          format:
+            type: qcow2
+            compression: false
+            compat: '1.1'
+  - name: kubevirt
+    build:
+      mpp-format-string: '{buildroot}'
+    stages:
+      - type: org.osbuild.oci-archive
+        inputs:
+          base:
+            type: org.osbuild.tree
+            origin: org.osbuild.pipeline
+            references:
+              - name:qemu-kubevirt-image
+        options:
+          # For the architecture for containers/registries we have
+          # to map x86_64->amd64 and aarch64->arm64 for the image build.
+          architecture:
+            mpp-if: arch == 'x86_64'
+            then: amd64
+            else:
+              mpp-if: arch == 'aarch64'
+              then: arm64
+              else: 
+                mpp-format-string: '{arch}'
+          filename:
+            mpp-format-string: '{artifact_name_prefix}-kubevirt.{arch}.ociarchive'
+          config:
+            Labels:
+              version:
+                mpp-format-string: '{build_version}'

src/runvm-osbuild

@@ -60,6 +60,7 @@ do
 done
 
 artifact_name_prefix=$(getconfig_def "artifact-name-prefix" "custom-coreos")
+build_version=$(getconfig_def "build-version" "0")
 ostree_container=$(getconfig "ostree-container")
 osname=$(getconfig "osname")
 deploy_via_container=$(getconfig_def "deploy-via-container" "")
@@ -109,6 +110,7 @@ podman images > /dev/null
 set -x; osbuild-mpp                                       \
     -D arch=\""$(arch)"\"                                 \
     -D artifact_name_prefix=\""${artifact_name_prefix}"\" \
+    -D build_version=\""${build_version}"\"               \
     -D ostree_ref=\""${ostree_ref}"\"                     \
     -D ostree_repo=\""${ostree_repo}"\"                   \
     -D ociarchive=\""${ostree_container}"\"               \