Use relay as extension

README.md

@@ -63,7 +63,7 @@ The following are all _required_.
 
 ## Testing
 
-If you want to see an example of a zip file this action can create looks like you can manually run the GitHub action "Test Production". This will create a dummy lambda layer (just containing one placeholder file) and the latest [relay](https://github.com/getsentry/relay) based Sentry Lambda Extension. After the GitHub action has run, you can download the generated artifact at the bottom of the summary page of the GitHub action result.
+If you want to see what an example of a zip file created by this action looks like you can manually run the GitHub action "Test Production". This will create a dummy lambda layer (just containing one placeholder file) and the latest [relay](https://github.com/getsentry/relay) based Sentry Lambda Extension. After the GitHub action has run, you can download the generated artifact at the bottom of the summary page of the GitHub action result.
 
 ## Contributing
 

action.yml

@@ -28,14 +28,32 @@ runs:
       with:
         path: ${{ inputs.build_cache_paths }}
         key: ${{ inputs.build_cache_key }}
-    - name: "Download and configure Sentry Lambda extension"
+    - name: Download latest relay
       shell: bash
       run: |
-        echo "Downloading Sentry Lambda extension..."
+        echo "Downloading relay..."
+        mkdir -p dist-serverless/relay
+        curl -0 --silent \
+            --output dist-serverless/relay/relay \
+            "$(curl -s https://release-registry.services.sentry.io/apps/relay/latest | jq -r .files.\"relay-Linux-x86_64\".url)"
+        chmod +x dist-serverless/relay/relay
+        echo "Done downloading relay."
+    - name: Configure Lambda extension to start relay
+      shell: bash
+      run: |
+        echo "Creating start script..."
         mkdir -p dist-serverless/extensions
-        curl -0 --silent --output dist-serverless/extensions/sentry-lambda-extension `curl -s https://release-registry.services.sentry.io/apps/sentry-lambda-extension/latest | jq -r .files.\"sentry-lambda-extension\".url`
+        cat > dist-serverless/extensions/sentry-lambda-extension << EOT
+        #!/bin/bash
+        set -euo pipefail
+        exec /opt/relay/relay run \
+            --mode=proxy \
+            --shutdown-timeout=2 \
+            --upstream-dsn="\$SENTRY_DSN" \
+            --aws-runtime-api="\$AWS_LAMBDA_RUNTIME_API"
+        EOT
         chmod +x dist-serverless/extensions/sentry-lambda-extension
-        echo "Done downloading Sentry Lambda extension..."
+        echo "Done creating start script."
     - name: "Setup tmate session"
       uses: mxschmitt/action-tmate@v3
       if: ${{ inputs.debug_enabled == 'true' }}