chore: add load-generator

.github/workflows/tests.yml

@@ -52,6 +52,22 @@ jobs:
       - name: go install goveralls
         run: go install github.com/mattn/goveralls@latest
 
+      # Clone Boulder because the go.mod contains `exclude` directives,
+      # and so the load-generator cannot be installed with a simple `go install`
+      - name: Checkout Boulder repository (load-generator)
+        uses: actions/checkout@v4
+
+        with:
+          repository: letsencrypt/boulder
+          path: boulder
+          ref: release-2024-02-20
+
+      - name: install load-generator
+        run: |
+          cd $GITHUB_WORKSPACE/boulder/test/load-generator
+          go install
+          cd -
+
       - name: go install
         run: go install -v -race ./...
 
@@ -69,3 +85,9 @@ jobs:
       # Perform a test issuance with chisel2.py
       - name: chisel
         run: REQUESTS_CA_BUNDLE=./test/certs/pebble.minica.pem python ./test/chisel2.py example.letsencrypt.org elpmaxe.letsencrypt.org
+
+      # Run the load-generator briefly - note, because Pebble isn't using the
+      # load-generator's mock DNS server none of the issuances will succeed. This
+      # step is performed just to shake out data races with concurrent requests.
+      - name: load-generator
+        run: load-generator -config ./test/config/load-generator-config.json > /dev/null