Problem: testground image not pushed to registry

.github/workflows/container.yml

@@ -0,0 +1,52 @@
+name: Push Testground Image
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*.*.*"
+
+env:
+  IMAGE_NAME: cronos-testground
+
+jobs:
+
+  push:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v23
+        with:
+          nix_path: nixpkgs=channel:nixos-24.05
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+      - uses: cachix/cachix-action@v12
+        with:
+          name: cronos
+          signingKey: "${{ secrets.CACHIX_SIGNING_KEY }}"
+      - name: build and push image
+        run: |
+          # login to ghcr.io
+          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+          [ "$VERSION" == "main" ] && VERSION=latest
+          echo "VERSION: $VERSION"
+
+          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+          echo "IMAGE_ID: $IMAGE_ID"
+
+          BUILD_TAG="$(nix eval --raw .#testground-image.imageTag)"
+          echo "BUILD_TAG: $BUILD_TAG"
+
+          docker load -i "$(nix build --no-link --print-out-paths .#testground-image)"
+          docker run --rm -e TEST_CASE=info $IMAGE_NAME:$BUILD_TAG
+          docker tag $IMAGE_NAME:$BUILD_TAG $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION

flake.nix

@@ -37,7 +37,7 @@
         in
         rec {
           packages = pkgs.cronos-matrix // {
-            inherit (pkgs) rocksdb;
+            inherit (pkgs) rocksdb testground-image;
           };
           apps = {
             cronosd = mkApp packages.cronosd;
@@ -72,12 +72,14 @@
         (import ./nix/build_overlay.nix)
         poetry2nix.overlays.default
         gomod2nix.overlays.default
+        (import ./testground/benchmark/overlay.nix)
         (final: super: {
           go = super.go_1_22;
           test-env = final.callPackage ./nix/testenv.nix { };
           cronos-matrix = final.callPackage ./nix/cronos-matrix.nix {
             bundle-exe = final.pkgsBuildBuild.callPackage nix-bundle-exe { };
           };
+          testground-image = final.callPackage ./nix/testground-image.nix { };
         })
       ];
     };

nix/testground-image.nix

@@ -0,0 +1,15 @@
+{ dockerTools, cronos-matrix, testground-testcase }:
+dockerTools.buildLayeredImage {
+  name = "cronos-testground";
+  contents = [
+    testground-testcase
+    cronos-matrix.cronosd
+  ];
+  config = {
+    Expose = [ 9090 26657 26656 1317 26658 26660 26659 30000 ];
+    Cmd = [ "/bin/testground-testcase" ];
+    Env = [
+      "PYTHONUNBUFFERED=1"
+    ];
+  };
+}

testground/benchmark/benchmark/context.py

@@ -12,7 +12,13 @@ def __init__(self, params: RunParams = None):
         if params is None:
             params = run_params()
         self.params = params
-        self.sync = SyncService(params)
+        self._sync = None
+
+    @property
+    def sync(self) -> SyncService:
+        if self._sync is None:
+            self._sync = SyncService(self.params)
+        return self._sync
 
     def init_common(self):
         self.wait_network_ready()
@@ -107,4 +113,5 @@ def __enter__(self):
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        self.sync.close()
+        if self._sync is not None:
+            self._sync.close()

testground/benchmark/benchmark/main.py

@@ -46,8 +46,16 @@ def entrypoint(ctx: Context):
     ctx.record_success()
 
 
+def info(ctx: Context):
+    """
+    Print the runtime configuration, mainly to check if the image is built successfully.
+    """
+    print(ctx.params)
+
+
 TEST_CASES = {
     "entrypoint": entrypoint,
+    "info": info,
 }