ERL-270: github: workflows: nemos-images: build qemu-arm64 targets

This makes use of the kiwi box build plugin to create an arm64 VM.

Additionally, roll the spread step into the build step. This adds more
complication to the build step, but allows us to test each target
individually without running out of resources. Spread does not have a
way to limit how many VMs are created, and as more and more targets are
added, we quickly run out of resources on the GitHub runners.

Signed-off-by: Isaac True <isaac.true@canonical.com>

.github/workflows/nemos-images.yaml

@@ -3,7 +3,7 @@ name: nemos-images
 on:
   pull_request: {}
 jobs:
-  qemu-amd64:
+  qemu:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
@@ -13,6 +13,9 @@ jobs:
         config:
           - minimal
           - reference
+        arch:
+          - amd64
+          - arm64
     steps:
       - name: "Checkout"
         uses: "actions/checkout@v3"
@@ -28,20 +31,42 @@ jobs:
       - name: "Install Kiwi"
         run: |
           sudo DEBIAN_FRONTEND="noninteractive" \
-            apt install -y kiwi kiwi-systemdeps
+            apt install -y kiwi kiwi-systemdeps python3-kiwi-boxed-plugin
       - name: "Run Kiwi"
         run: |
-          sudo kiwi-ng --debug --profile bootstrapped \
-            --config nemos-images-${{ matrix.config }}-${{ matrix.series }}/kiwi.yaml \
-            system build --target-dir build \
-            --description nemos-images-${{ matrix.config }}-${{ matrix.series }}/qemu-amd64/
-          sudo mv build/nemos-image-${{ matrix.config }}-${{ matrix.series }}.*.qcow2 \
-            nemos-image-${{ matrix.config }}-${{ matrix.series }}-amd64.qcow2
-      - name: "Archive"
-        uses: "actions/upload-artifact@v3"
-        with:
-          name: "nemos-image-${{ matrix.config }}-${{ matrix.series }}-amd64"
-          path: "nemos-image-${{ matrix.config }}-${{ matrix.series }}-amd64.qcow2"
+          # If we are building for amd64, then we can build natively. Otherwise,
+          # we need to use the Kiwi boxbuild plugin to build in a VM
+          if [ "${{ matrix.arch }}" = "amd64" ]; then
+            sudo kiwi-ng --debug --profile bootstrapped \
+              --config nemos-images-${{ matrix.config }}-${{ matrix.series }}/kiwi.yaml \
+              system build --target-dir build \
+              --description nemos-images-${{ matrix.config }}-${{ matrix.series }}/qemu-${{ matrix.arch}}/
+          else
+            sudo kiwi-ng --debug --profile bootstrapped \
+              system boxbuild \
+              --box ubuntu --aarch64 --machine=virt --no-accel --cpu cortex-a53 \
+              --box-memory=$(( 4 * 1024 )) --box-smp-cpus=2 -- \
+              --target-dir build \
+              --description nemos-images-${{ matrix.config }}-${{ matrix.series }}/qemu-${{ matrix.arch }}/
+          fi
+      - name: "Install spread dependencies"
+        run: |
+          sudo DEBIAN_FRONTEND="noninteractive" \
+            apt install -y golang sshpass qemu-system-x86_64 ovmf \
+              qemu-system-arm qemu-efi-aarch64
+      - name: "Install spread"
+        run: |
+          go clean -modcache
+          go install github.com/snapcore/spread/cmd/spread@latest
+      - name: "Copy QEMU image to spread directory"
+        run: |
+          mkdir -p ~/.spread/adhoc
+          sudo mv -v build/nemos-image*.qcow2 \
+            ~/.spread/adhoc/nemos-image-${{ matrix.config }}-${{ matrix.series }}-${{ matrix.arch }}.qcow2
+          sudo chmod a+rw ~/.spread/adhoc/*.qcow2
+      - name: "Run the spread tests inside QEMU"
+        run: |
+         ~/go/bin/spread -v "adhoc:nemos-image-${{ matrix.config }}-${{ matrix.series }}-${{ matrix.arch }}"
   s32g274ardb2:
     runs-on: "ubuntu-latest"
     strategy:
@@ -77,33 +102,3 @@ jobs:
             --box-memory=$(( 2 * 1024 )) --box-smp-cpus=2 -- \
             --target-dir build \
             --description nemos-images-${{ matrix.config }}-${{ matrix.series }}/s32g274ardb2/
-
-  spread:
-    runs-on: "ubuntu-latest"
-    needs: "qemu-amd64"
-    steps:
-      - uses: "actions/checkout@v3"
-      - name: "Update system packages"
-        run: |
-          sudo apt update
-          sudo DEBIAN_FRONTEND="noninteractive" \
-            apt full-upgrade -y
-      - name: "Install dependencies"
-        run: |
-          sudo DEBIAN_FRONTEND="noninteractive" \
-            apt install -y golang ovmf qemu-system-x86 sshpass
-      - name: "Install spread"
-        run: |
-          go clean -modcache
-          go install github.com/snapcore/spread/cmd/spread@latest
-      - name: "Download QEMU images"
-        uses: actions/download-artifact@v3
-      - name: "Copy QEMU images to spread directory"
-        run: |
-          mkdir -p ~/.spread/adhoc
-          mv -v nemos-image-*/*.qcow2 ~/.spread/adhoc/
-      - name: "Run the spread tests inside QEMU"
-        run: |
-          # Currently, we only support amd64. Use the spread wildcard selector
-          # to make sure we only run those images.
-          ~/go/bin/spread -v "adhoc:...-amd64"