build: Start virtual machine w/ cloud-init configuration

.gitea/workflows/actions.yaml

@@ -50,17 +50,27 @@ jobs:
     steps:
       - name: Check out repository code
         uses: actions/checkout@v4
+      - name: Create folder structure
+        run: |
+          mkdir -p \
+            ubuntu-vm
+      - name: Download source Ubuntu iso
+        run: |
+          curl -L \
+            https://sn.itch.fyi/Repository/iso/Canonical/Ubuntu%20Server%2024.04/ubuntu-24.04-server-cloudimg-amd64.img \
+            -o ubuntu-vm/ubuntu.img \
+            -u ${{ secrets.REPO_USERNAME }}:${{ secrets.REPO_PASSWORD }}
       - name: Generate seed ISO
-        shell: bash
         run: |
           apt-get update && \
           apt-get install -y \
+            gettext \
             genisoimage
 
           envsubst < cloud-init/user-data.template > cloud-init/user-data
 
           genisoimage \
-            -output seed.iso \
+            -output ubuntu-vm/seed.iso \
             -volid cidata \
             -joliet \
             -rock \
@@ -68,6 +78,24 @@ jobs:
         env:
           ROOT_HASHED_PASSWORD: ${{ secrets.ROOT_HASHED_PASSWORD }}
           PUBLIC_SSHKEY: ${{ secrets.PUBLIC_SSHKEY }}
+      - name: Start virtual machine
+        run: |
+          apt-get update && \
+          apt-get install -y \
+            qemu-utils
+
+          [ -e /dev/kvm ] && kvm_flag="-enable-kvm" || kvm_flag=""
+
+          qemu-system-x86_64 \
+            $kvm_flag \
+            -m 3072 \
+            -smp 2 \
+            -cpu host \
+            -drive file=ubuntu.img,if=virtio,format=qcow2 \
+            -drive file=seed.iso,format=raw,media=cdrom \
+            -nographic \
+            -net nic \
+            -net user
 
   # semrel:
   #   name: Semantic Release

cloud-init/user-data.template

@@ -14,6 +14,11 @@ runcmd:
   - apt-get install -y linux-modules-extra-$(uname -r)
   - sysctl -w net.ipv6.conf.all.disable_ipv6=1
   - systemctl enable --now qemu-guest-agent.service
+  - cloud-init clean --logs
+  - truncate -s 0 /etc/hostname /etc/machine-id
+  - rm -f /etc/ssh/ssh_host_* /var/lib/dbus/machine-id
+  - ln -s /etc/machine-id /var/lib/dbus/machine-id
+  - poweroff
 
 disable_root: false
 users: