tests: replace INTEGRATION.md with automated QEMU e2e suite

- examples/fedora/Containerfile: add serial autologin (safe now that CI
  no longer pushes this image publicly) so QEMU tests run unattended
- tests/e2e.py: pexpect-based runner; boots disk.raw in QEMU and checks:
  cbootc status output, BLS title != todoOS, rollback fails cleanly with
  one entry, grubenv exists, config.toml present
- .github/workflows/e2e.yml: builds base image from source on every PR
  (catches regressions in Containerfile.base and Rust code), then stacks
  the example Containerfile on top and runs e2e.py; GHA layer cache keeps
  the slow dnf+dracut build fast after the first run
- Remove tests/INTEGRATION.md

Author: henrywang

.github/workflows/e2e.yml

@@ -0,0 +1,77 @@
+name: E2E Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  e2e:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Enable KVM
+        run: |
+          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' \
+            | sudo tee /etc/udev/rules.d/99-kvm4all.rules
+          sudo udevadm control --reload-rules
+          sudo udevadm trigger --name-match=kvm
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -q
+          sudo apt-get install -y -q \
+            qemu-system-x86 ovmf podman python3-pexpect
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to ghcr.io
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Build the base image from source (covers PRs that change Containerfile.base
+      # or the Rust code compiled inside it). Layer cache keeps this fast after
+      # the first run.
+      - name: Build base image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: Containerfile.base
+          push: false
+          load: true
+          tags: composefs-os-fedora:pr
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Build test image
+        run: |
+          podman build \
+            --build-arg BASE_IMAGE=composefs-os-fedora:pr \
+            -t composefs-os-test:latest \
+            -f examples/fedora/Containerfile .
+
+      - name: Install to disk image
+        run: |
+          sudo podman run --rm --privileged \
+            -v ${{ github.workspace }}:/output \
+            -v /var/lib/containers:/var/lib/containers \
+            -v /var/tmp:/var/tmp \
+            composefs-os-test:latest \
+            cbootc install to-disk /output/disk.raw --size 5G
+
+      - name: Run e2e tests
+        run: python3 tests/e2e.py disk.raw
+
+      - name: Upload disk image on failure
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: disk-raw
+          path: disk.raw
+          retention-days: 1

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2024"
 description = "Upgrade/rollback tool embedded in composefs-os images"
 license = "MIT"
-repository = "https://github.com/OWNER/composefs-os"
+repository = "https://github.com/henrywang/composefs-os"
 
 [dependencies]
 anyhow = "1.0"

README.md

@@ -21,11 +21,10 @@ See [DESIGN.md](DESIGN.md) for rationale and architecture.
 
 | Image | Status |
 |-------|--------|
-| `ghcr.io/OWNER/composefs-os-fedora:43` | Working |
+| `ghcr.io/henrywang/composefs-os-fedora:43` | Working |
 | Ubuntu | Planned |
 | Arch Linux | Planned |
 
-Replace `OWNER` with the GitHub organisation or username hosting the packages.
 
 ## Quick Start
 
@@ -35,7 +34,7 @@ sudo podman run --rm --privileged \
     -v $(pwd):/output \
     -v /var/lib/containers:/var/lib/containers \
     -v /var/tmp:/var/tmp \
-    ghcr.io/OWNER/composefs-os-fedora:43 \
+    ghcr.io/henrywang/composefs-os-fedora:43 \
     cbootc install to-disk /output/disk.raw --size 10G
 
 # Boot it
@@ -51,7 +50,7 @@ The published base images are a starting point. Add your own packages and
 configuration in a derived `Containerfile`:
 
 ```dockerfile
-FROM ghcr.io/OWNER/composefs-os-fedora:43
+FROM ghcr.io/henrywang/composefs-os-fedora:43
 
 # Add packages
 RUN dnf install -y vim htop && dnf clean all
@@ -81,7 +80,7 @@ cbootc rollback
 systemctl reboot
 
 # Switch to a different image
-cbootc switch docker://ghcr.io/OWNER/composefs-os-fedora:43
+cbootc switch docker://ghcr.io/henrywang/composefs-os-fedora:43
 ```
 
 The tracked image reference is stored in `/var/lib/cbootc/config.toml` and
@@ -105,10 +104,11 @@ composefs-os/
     ubuntu/
       Containerfile          Ubuntu (stub — not yet functional)
   tests/
-    INTEGRATION.md           Manual integration test checklist
+    e2e.py                   QEMU-based end-to-end test suite
   .github/workflows/
     ci.yml                   Rust build, test, lint
     container.yml            Build and push base image to ghcr.io
+    e2e.yml                  End-to-end tests (boots in QEMU)
 ```
 
 ## Known Limitations

examples/fedora/Containerfile

@@ -1,13 +1,13 @@
 # Template for a custom Fedora composefs-os image.
 #
 # Pattern:
-#   1. FROM ghcr.io/OWNER/composefs-os-fedora:43
+#   1. FROM ghcr.io/henrywang/composefs-os-fedora:43
 #   2. Install packages, write config — /etc and /var are normal here
 #   3. Keep the LABEL block at the bottom
 #
 # Build locally:
 #   podman build -t my-fedora-cfs:latest \
-#       --build-arg BASE_IMAGE=ghcr.io/OWNER/composefs-os-fedora:43 \
+#       --build-arg BASE_IMAGE=ghcr.io/henrywang/composefs-os-fedora:43 \
 #       -f examples/fedora/Containerfile .
 #
 # Deploy to a disk image file:
@@ -16,14 +16,19 @@
 #       -v /var/tmp:/var/tmp \
 #       my-fedora-cfs:latest cbootc install to-disk /output/disk.raw --size 10G
 
-ARG BASE_IMAGE=ghcr.io/OWNER/composefs-os-fedora:43
+ARG BASE_IMAGE=ghcr.io/henrywang/composefs-os-fedora:43
 FROM ${BASE_IMAGE}
 
 # --- Customise below this line -------------------------------------------
 
-# Set hostname
 RUN echo 'myhost' > /etc/hostname
 
+# Serial console autologin — convenient for local QEMU testing.
+# Remove or replace with SSH keys for any internet-facing deployment.
+RUN mkdir -p /usr/lib/systemd/system/serial-getty@ttyS0.service.d && \
+    printf '[Service]\nExecStart=\nExecStart=-/sbin/agetty --autologin root --noclear %%I 115200 vt220\n' \
+        > /usr/lib/systemd/system/serial-getty@ttyS0.service.d/autologin.conf
+
 # Add your packages here, e.g.:
 # RUN dnf install -y --setopt=install_weak_deps=False vim htop && dnf clean all