Arm support

Dockerfile

@@ -38,6 +38,16 @@ RUN zypper addrepo https://download.opensuse.org/repositories/isv:SUSE:Edge:Edge
     nm-configurator && \
     zypper clean -a
 
+# Make adjustments for running guestfish and image modifications on aarch64
+# guestfish looks for very specific locations on the filesystem for UEFI firmware
+# and also expects the boot kernel to be a portable executable (PE), not ELF.
+RUN zypper install -y qemu-uefi-aarch64 && \
+	mkdir -p /usr/share/edk2/aarch64 && \
+	cp /usr/share/qemu/aavmf-aarch64-code.bin /usr/share/edk2/aarch64/QEMU_EFI-pflash.raw && \
+	cp /usr/share/qemu/aavmf-aarch64-vars.bin /usr/share/edk2/aarch64/vars-template-pflash.raw && \
+	mv /boot/vmlinux* /boot/backup-vmlinux && \
+	zypper clean -a
+
 COPY --from=0 /src/eib /bin/eib
 COPY config/artifacts.yaml artifacts.yaml
 

RELEASE_NOTES.md

@@ -8,6 +8,7 @@
 * Kubernetes manifests are now applied in a systemd service
 * Artifact sources origin and metadata are now extracted from a configuration file (`config/artifacts.yaml`)
 * Dropped `-chart` suffix from installed Helm chart names
+* Added ability to build Arm images on an Arm host machine
 
 ## API
 

pkg/build/raw.go

@@ -106,6 +106,7 @@ func (b *Builder) writeModifyScript(imageFilename string, includeCombustion, ren
 		ConfigureCombustion bool
 		RenameFilesystem    bool
 		DiskSize            string
+		Arch                string
 	}{
 		ImagePath:           imageFilename,
 		CombustionDir:       b.context.CombustionDir,
@@ -114,6 +115,7 @@ func (b *Builder) writeModifyScript(imageFilename string, includeCombustion, ren
 		ConfigureCombustion: includeCombustion,
 		RenameFilesystem:    renameFilesystem,
 		DiskSize:            string(b.context.ImageDefinition.OperatingSystem.RawConfiguration.DiskSize),
+		Arch:                string(b.context.ImageDefinition.Image.Arch),
 	}
 
 	data, err := template.Parse(modifyScriptName, modifyRawImageTemplate, &values)

pkg/build/raw_test.go

@@ -78,7 +78,7 @@ func TestWriteModifyScript(t *testing.T) {
 				"btrfs filesystem label / INSTALL",
 				"sed -i '/ignition.platform/ s/$/ alpha beta /' /tmp/grub.cfg",
 				"truncate -s 64G",
-				"virt-resize --expand /dev/sda3",
+				"virt-resize --expand $ROOT_PART",
 			},
 			expectedMissing: []string{},
 		},

pkg/build/templates/modify-raw-image.sh.tpl

@@ -13,6 +13,17 @@ set -euo pipefail
 #
 # Guestfish Command Documentation: https://libguestfs.org/guestfish.1.html
 
+# In x86_64, the default root partition is the third partition
+ROOT_PART=/dev/sda3
+
+# Make the necessary adaptations for aarch64
+if [[ {{ .Arch }} == "aarch64" ]]; then
+	if ! test -f /dev/kvm; then
+		export LIBGUESTFS_BACKEND_SETTINGS=force_tcg
+	fi
+	ROOT_PART=/dev/sda2
+fi
+
 # Test the block size of the base image and adapt to suit either 512/4096 byte images
 BLOCKSIZE=512
 if ! guestfish -i --blocksize=$BLOCKSIZE -a {{.ImagePath}} echo "[INFO] 512 byte sector check successful."; then
@@ -26,7 +37,7 @@ fi
 {{ if ne .DiskSize "" -}}
 truncate -r {{.ImagePath}} {{.ImagePath}}.expanded
 truncate -s {{.DiskSize}} {{.ImagePath}}.expanded
-virt-resize --expand /dev/sda3 {{.ImagePath}} {{.ImagePath}}.expanded
+virt-resize --expand $ROOT_PART {{.ImagePath}} {{.ImagePath}}.expanded
 cp {{.ImagePath}}.expanded {{.ImagePath}}
 rm -f {{.ImagePath}}.expanded
 {{ end }}

pkg/eib/eib.go

@@ -141,7 +141,7 @@ func buildCombustion(ctx *image.Context, rootDir string) (*combustion.Combustion
 		imgType := ctx.ImageDefinition.Image.ImageType
 		baseBuilder := resolver.NewTarballBuilder(ctx.BuildDir, imgPath, imgType, p)
 
-		combustionHandler.RPMResolver = resolver.New(ctx.BuildDir, p, baseBuilder, "")
+		combustionHandler.RPMResolver = resolver.New(ctx.BuildDir, p, baseBuilder, "", string(ctx.ImageDefinition.Image.Arch))
 		combustionHandler.RPMRepoCreator = rpm.NewRepoCreator(ctx.BuildDir)
 	}
 

pkg/rpm/resolver/resolver.go

@@ -56,14 +56,17 @@ type Resolver struct {
 	// path to the mounts.conf filepath that overrides the default mounts.conf configuration;
 	// if left empty the default override path will be used. For more info - https://github.com/containers/common/blob/v0.57/docs/containers-mounts.conf.5.md
 	overrideMountsPath string
+	// architecture of the packages the resolver should pull
+	arch string
 }
 
-func New(workDir string, podman Podman, baseImageBuilder BaseResolverImageBuilder, overrideMountsPath string) *Resolver {
+func New(workDir string, podman Podman, baseImageBuilder BaseResolverImageBuilder, overrideMountsPath, arch string) *Resolver {
 	return &Resolver{
 		dir:                      workDir,
 		podman:                   podman,
 		baseResolverImageBuilder: baseImageBuilder,
 		overrideMountsPath:       overrideMountsPath,
+		arch:                     arch,
 	}
 }
 
@@ -185,11 +188,13 @@ func (r *Resolver) writeRPMResolutionScript(localRPMConfig *image.LocalRPMConfig
 		LocalRPMList string
 		LocalGPGList string
 		NoGPGCheck   bool
+		Arch         string
 	}{
 		RegCode:    packages.RegCode,
 		AddRepo:    packages.AdditionalRepos,
 		CacheDir:   r.generateResolverImgRPMRepoPath(),
 		NoGPGCheck: packages.NoGPGCheck,
+		Arch:       r.arch,
 	}
 
 	if len(packages.PKGList) > 0 {

pkg/rpm/resolver/templates/prepare-tarball.sh.tpl

@@ -10,6 +10,11 @@ set -euo pipefail
 WORK_DIR={{.WorkDir}}
 IMG_PATH={{.ImgPath}}
 
+# Make the necessarry adaptations for aarch64
+if [[ $(uname -m) == "aarch64" ]]; then
+	export LIBGUESTFS_BACKEND_SETTINGS=force_tcg
+fi
+
 {{ if eq .ImgType "iso" -}}
 xorriso -osirrox on -indev $IMG_PATH extract / $WORK_DIR/iso-root/
 

pkg/rpm/resolver/templates/rpm-resolution.sh.tpl

@@ -9,10 +9,11 @@ set -euo pipefail
 #  LocalRPMList - list of local RPMs for which dependency resolution has to be done
 #  LocalGPGList - list of local GPG keys that will be imported in the resolver image
 #  NoGPGCheck   - when set to true skips the GPG validation for all third-party repositories and local RPMs
+#  Arch         - sets the architecture of the rpm packages to pull
 
 {{ if ne .RegCode "" }}
 suseconnect -r {{ .RegCode }}
-SLE_SP=$(cat /etc/rpm/macros.sle | awk '/sle/ {print $2};' | cut -c4) && suseconnect -p PackageHub/15.$SLE_SP/x86_64
+SLE_SP=$(cat /etc/rpm/macros.sle | awk '/sle/ {print $2};' | cut -c4) && suseconnect -p PackageHub/15.$SLE_SP/{{ .Arch }}
 zypper ref
 trap "suseconnect -d" EXIT
 {{ end -}}
@@ -51,4 +52,4 @@ zypper \
   --allow-vendor-change \
   -n {{.PKGList}} {{.LocalRPMList}}
 
-touch {{.CacheDir}}/zypper-success
+touch {{.CacheDir}}/zypper-success