Exercise repeated systemd installation in CI

.github/workflows/linux-control-agent.yml

@@ -10,7 +10,7 @@ permissions:
 
 jobs:
   build-and-test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -50,3 +50,46 @@ jobs:
 
       - name: Publish agent arm64
         run: dotnet publish src/ServerMonitorManager.Agent/ServerMonitorManager.Agent.csproj --configuration Release --runtime linux-arm64 --self-contained true -p:PublishSingleFile=true -p:PublishTrimmed=true
+
+      - name: Build systemd smoke release
+        run: |
+          dotnet publish src/ServerMonitorManager.Agent/ServerMonitorManager.Agent.csproj \
+            --configuration Release --runtime linux-x64 --self-contained true \
+            -p:PublishSingleFile=true -p:PublishTrimmed=true -o smoke/agent
+          dotnet publish src/ServerMonitorManager.Control/ServerMonitorManager.Control.csproj \
+            --configuration Release --runtime linux-x64 --self-contained true \
+            -p:PublishSingleFile=true -p:PublishTrimmed=true -o smoke/control
+          install -d smoke/deploy smoke/bootstrap
+          install -m 0644 deploy/ochenstarik-smm-control.service smoke/deploy/
+          install -m 0644 deploy/ochenstarik-smm-agent.service smoke/deploy/
+          install -m 0644 deploy/ochenstarik-smm-firewall.service smoke/deploy/
+          install -m 0755 deploy/ochenstarik-smm-policy-apply smoke/deploy/
+          install -m 0755 deploy/ochenstarik-server-monitor-manager.sh smoke/bootstrap/
+          tar -C smoke -czf smoke-release.tar.gz agent control deploy bootstrap
+          sha256sum smoke-release.tar.gz > smoke-release.tar.gz.sha256
+
+      - name: Verify repeated systemd installation
+        run: |
+          set -Eeuo pipefail
+          sudo deploy/ochenstarik-server-monitor-manager.sh install-control \
+            smoke-release.tar.gz 127.0.0.1 7443
+          for _ in {1..30}; do
+            curl --fail --silent --cacert /etc/ochenstarik-server-monitor-manager/control-ca.crt \
+              https://127.0.0.1:7443/healthz && break
+            sleep 1
+          done
+          curl --fail --silent --show-error \
+            --cacert /etc/ochenstarik-server-monitor-manager/control-ca.crt \
+            https://127.0.0.1:7443/healthz
+          sudo deploy/ochenstarik-server-monitor-manager.sh install-control \
+            smoke-release.tar.gz 127.0.0.1 7443
+          sudo systemctl restart ochenstarik-smm-control.service
+          sudo systemctl is-active --quiet ochenstarik-smm-control.service
+          curl --fail --silent --show-error \
+            --retry 10 --retry-all-errors --retry-delay 1 \
+            --cacert /etc/ochenstarik-server-monitor-manager/control-ca.crt \
+            https://127.0.0.1:7443/healthz
+
+      - name: Clean up systemd smoke installation
+        if: always()
+        run: sudo deploy/ochenstarik-server-monitor-manager.sh uninstall-control --confirm-destroy-control || true