ci(release): bring Fedora RPM canary to parity

The RPM canary needs to exercise the install.sh user-service path, but a GitHub
Actions job container does not boot with systemd as PID 1. The Fedora RPM
canary needs to exercise the install.sh user-service path, but a GitHub Actions
job container does not boot with systemd as PID 1. This means the Fedora RPM
canary was incomplete as compared to the others.

With this change, we run Fedora as a nested privileged systemd container
instead, wait for systemd to become reachable, then start the root user manager
so systemctl --user works for the RPM gateway unit, achieving parity with the
other canary tests.

Signed-off-by: Kris Hicks <khicks@nvidia.com>

Author: krishicks

.github/workflows/release-canary.yml

@@ -57,21 +57,94 @@ jobs:
     if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
     runs-on: linux-amd64-cpu8
     timeout-minutes: 20
-    container:
-      image: fedora:latest
-      options: --privileged
+    env:
+      FEDORA_CANARY_CONTAINER: openshell-fedora-canary-${{ github.run_id }}-${{ github.run_attempt }}
+      INSTALL_SH_REF: ${{ github.event.workflow_run.head_sha || github.sha }}
     steps:
-      - name: Ensure Podman
+      - name: Start Fedora systemd container and root user manager
+        run: |
+          set -euo pipefail
+
+          docker run --detach \
+            --name "${FEDORA_CANARY_CONTAINER}" \
+            --privileged \
+            --cgroupns=host \
+            --tmpfs /run \
+            --tmpfs /tmp \
+            --volume /sys/fs/cgroup:/sys/fs/cgroup:rw \
+            fedora:latest \
+            bash -lc 'dnf install -y curl dbus-daemon podman systemd && exec /usr/sbin/init'
+
+          for _ in $(seq 1 120); do
+            if docker exec "${FEDORA_CANARY_CONTAINER}" systemctl list-units --no-pager >/dev/null 2>&1; then
+              break
+            fi
+            if [ "$(docker inspect -f '{{.State.Running}}' "${FEDORA_CANARY_CONTAINER}")" != "true" ]; then
+              echo "::error::Fedora systemd container exited before systemd became reachable"
+              docker logs "${FEDORA_CANARY_CONTAINER}" >&2 || true
+              exit 1
+            fi
+            sleep 1
+          done
+
+          if ! docker exec "${FEDORA_CANARY_CONTAINER}" systemctl list-units --no-pager >/dev/null 2>&1; then
+            echo "::error::Fedora systemd container did not become reachable within 120s"
+            docker logs "${FEDORA_CANARY_CONTAINER}" >&2 || true
+            exit 1
+          fi
+
+          docker exec --interactive "${FEDORA_CANARY_CONTAINER}" env \
+            HOME=/root \
+            XDG_RUNTIME_DIR=/run/user/0 \
+            DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/0/bus \
+            bash -s <<'EOF'
+          set -euo pipefail
+          # install.sh manages the RPM gateway as a systemd user unit. This
+          # container is booted with systemd as PID 1, but it still has no
+          # login session. Start root's user manager explicitly so the
+          # installer can test service restart and gateway registration
+          # instead of its "restart later" fallback.
+          mkdir -p "${XDG_RUNTIME_DIR}"
+          chmod 700 "${XDG_RUNTIME_DIR}"
+          systemctl start user-runtime-dir@0.service || true
+          systemctl start user@0.service
+
+          for _ in $(seq 1 30); do
+            if systemctl --user daemon-reload; then
+              break
+            fi
+            sleep 1
+          done
+          if ! systemctl --user daemon-reload; then
+            systemctl status user@0.service --no-pager >&2 || true
+            journalctl -u user@0.service --no-pager -n 80 >&2 || true
+            systemctl --user status --no-pager >&2 || true
+            exit 1
+          fi
+          EOF
+
+      - name: Install and check status
         run: |
-          dnf install -y curl podman
+          set -euo pipefail
+
+          docker exec --interactive "${FEDORA_CANARY_CONTAINER}" env \
+            HOME=/root \
+            XDG_RUNTIME_DIR=/run/user/0 \
+            DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/0/bus \
+            INSTALL_SH_REF="${INSTALL_SH_REF}" \
+            bash -s <<'EOF'
+          set -euo pipefail
           mkdir -p "${HOME}/.config/openshell"
           printf 'OPENSHELL_DRIVERS=podman\n' > "${HOME}/.config/openshell/gateway.env"
           podman info
+          curl -LsSf "https://raw.githubusercontent.com/NVIDIA/OpenShell/${INSTALL_SH_REF}/install.sh" | sh
+          openshell status
+          EOF
 
-      - name: Install and check status
+      - name: Stop Fedora systemd container
+        if: always()
         run: |
-          curl -LsSf https://raw.githubusercontent.com/NVIDIA/OpenShell/${{ github.event.workflow_run.head_sha || github.sha }}/install.sh | sh
-          openshell status
+          docker rm -f "${FEDORA_CANARY_CONTAINER}" >/dev/null 2>&1 || true
 
   ubuntu-snap:
     name: Ubuntu Snap