Add healthcheck to featureflagservice

CHANGELOG.md

@@ -166,3 +166,5 @@ significant modifications will be credited to OpenTelemetry Authors.
 ([#648](https://github.com/open-telemetry/opentelemetry-demo/pull/648))
 * Add Jaeger-SPM-Config
 ([#655](https://github.com/open-telemetry/opentelemetry-demo/pull/655))
+* Add healthcheck to featureflagservice
+([#661](https://github.com/open-telemetry/opentelemetry-demo/pull/661)

docker-compose.yml

@@ -231,6 +231,8 @@ services:
       - OTEL_SERVICE_NAME=featureflagservice
       - DATABASE_URL=ecto://ffs:ffs@ffs_postgres:5432/ffs
       - FEATURE_FLAG_SERVICE_PATH_ROOT="/feature"
+    healthcheck:
+      test: ["CMD", "curl", "-H", "baggage: synthetic_request=true", "-f", "http://localhost:${FEATURE_FLAG_SERVICE_PORT}"]
     depends_on:
       ffs_postgres:
         condition: service_healthy

src/featureflagservice/Dockerfile

@@ -80,7 +80,7 @@ RUN mix release
 # the compiled release and other runtime necessities
 FROM ${RUNNER_IMAGE}
 
-RUN apt-get update -y && apt-get install -y libstdc++6 openssl libncurses5 locales \
+RUN apt-get update -y && apt-get install -y libstdc++6 openssl libncurses5 locales curl \
   && apt-get clean && rm -f /var/lib/apt/lists/*_*
 
 # Set the locale