Use service environment vars, not setting new vars

docker-compose.yml

@@ -127,7 +127,7 @@ services:
     ports:
       - "${CURRENCY_SERVICE_PORT}"
     environment:
-      - PORT=${CURRENCY_SERVICE_PORT}
+      - CURRENCY_SERVICE_PORT
       - OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
       - OTEL_RESOURCE_ATTRIBUTES=service.name=currencyservice
     depends_on:
@@ -144,7 +144,7 @@ services:
       - "${EMAIL_SERVICE_PORT}"
     environment:
       - APP_ENV=production
-      - PORT=${EMAIL_SERVICE_PORT}
+      - EMAIL_SERVICE_PORT
       - OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=http://otelcol:4318/v1/traces
       - OTEL_RESOURCE_ATTRIBUTES=service.name=emailservice
     depends_on:
@@ -247,7 +247,7 @@ services:
     ports:
       - "${SHIPPING_SERVICE_PORT}"
     environment:
-      - PORT=${SHIPPING_SERVICE_PORT}
+      - SHIPPING_SERVICE_PORT
       - OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
       - OTEL_RESOURCE_ATTRIBUTES=service.name=shippingservice
     depends_on:
@@ -264,8 +264,8 @@ services:
       - "${FEATURE_FLAG_SERVICE_PORT}:${FEATURE_FLAG_SERVICE_PORT}"
       - "${FEATURE_FLAG_GRPC_SERVICE_PORT}"
     environment:
-      - PORT=${FEATURE_FLAG_SERVICE_PORT}
-      - GRPC_PORT=${FEATURE_FLAG_GRPC_SERVICE_PORT}
+      - FEATURE_FLAG_SERVICE_PORT
+      - FEATURE_FLAG_GRPC_SERVICE_PORT
       - OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
       - OTEL_RESOURCE_ATTRIBUTES=service.name=featureflagservice
       - DATABASE_URL=ecto://ffs:ffs@ffs_postgres:5432/ffs

src/adservice/src/main/java/hipstershop/AdService.java

@@ -58,7 +58,7 @@ public final class AdService {
   private static final AdService service = new AdService();
 
   private void start() throws IOException {
-    int port = Integer.parseInt(System.getenv().getOrDefault("AD_SERVICE_PORT", "9555"));
+    int port = Integer.parseInt(System.getenv("AD_SERVICE_PORT"));
     healthMgr = new HealthStatusManager();
 
     server =

src/cartservice/src/Dockerfile

@@ -32,5 +32,4 @@ WORKDIR /usr/src/app/
 COPY --from=builder /cartservice/ ./
 
 EXPOSE ${CART_SERVICE_PORT}
-
 ENTRYPOINT [ "./cartservice" ]

src/currencyservice/Dockerfile

@@ -56,4 +56,4 @@ RUN cd /currencyservice \
     && mkdir -p build && cd build \
     && cmake .. && make -j install
 
-ENTRYPOINT currencyservice ${PORT} ${OTEL_EXPORTER_OTLP_TRACES_ENDPOINT} ${OTEL_RESOURCE_ATTRIBUTES}
+ENTRYPOINT currencyservice ${CURRENCY_SERVICE_PORT} ${OTEL_EXPORTER_OTLP_TRACES_ENDPOINT} ${OTEL_RESOURCE_ATTRIBUTES}

src/featureflagservice/README.md

@@ -22,7 +22,7 @@ docker compose up
 And run the Release:
 
 ``` shell
-PHX_SERVER=1 PORT=4000 GRPC_PORT=4001 _build/prod/rel/featureflagservice/bin/featureflagservice start_iex
+PHX_SERVER=1 FEATURE_FLAG_SERVICE_PORT=4000 FEATURE_FLAG_GRPC_SERVICE_PORT=4001 _build/prod/rel/featureflagservice/bin/featureflagservice start_iex
 ```
 
 ## Instrumentation

src/featureflagservice/config/runtime.exs

@@ -4,7 +4,7 @@ if System.get_env("PHX_SERVER") do
   config :featureflagservice, FeatureflagserviceWeb.Endpoint, server: true
 end
 
-grpc_port = String.to_integer(System.get_env("GRPC_PORT") || "4001")
+grpc_port = String.to_integer(System.get_env("FEATURE_FLAG_GRPC_SERVICE_PORT"))
 
 config :grpcbox,
   servers: [
@@ -51,7 +51,7 @@ if config_env() == :prod do
       """
 
   host = System.get_env("PHX_HOST") || "localhost"
-  port = String.to_integer(System.get_env("PORT") || "4000")
+  port = String.to_integer(System.get_env("FEATURE_FLAG_SERVICE_PORT"))
 
   config :featureflagservice, FeatureflagserviceWeb.Endpoint,
     url: [host: host, port: 443, scheme: "https"],

src/paymentservice/Dockerfile

@@ -33,5 +33,4 @@ COPY ./src/paymentservice/ ./
 COPY ./pb/demo.proto ./
 
 EXPOSE ${PAYMENT_SERVICE_PORT}
-
 ENTRYPOINT [ "node", "--require", "./tracing.js", "./index.js" ]

src/paymentservice/index.js

@@ -55,7 +55,6 @@ async function closeGracefully(signal) {
 
 // Main
 const logger = pino()
-const port = process.env['PAYMENT_SERVICE_PORT']
 const hipsterShopPackage = grpc.loadPackageDefinition(protoLoader.loadSync('demo.proto'))
 const server = new grpc.Server()
 
@@ -65,9 +64,13 @@ server.addService(health.service, new health.Implementation({
 
 server.addService(hipsterShopPackage.hipstershop.PaymentService.service, { charge: chargeServiceHandler })
 
-server.bindAsync(`0.0.0.0:${port}`, grpc.ServerCredentials.createInsecure(), () => {
-    logger.info(`PaymentService gRPC server started on port ${port}`)
-    server.start()
+server.bindAsync(`0.0.0.0:${process.env['PAYMENT_SERVICE_PORT']}`, grpc.ServerCredentials.createInsecure(), (err, port) => {
+  if (err) {
+    return logger.error(err)
+  }
+
+  logger.info(`PaymentService gRPC server started on port ${port}`)
+  server.start()
   }
 )
 

src/shippingservice/Dockerfile

@@ -16,7 +16,6 @@ RUN GRPC_HEALTH_PROBE_VERSION=v0.4.7 && \
     chmod +x /bin/grpc_health_probe
 WORKDIR /app
 COPY --from=builder /app/target/release/shippingservice /shippingservice
-ENV PORT=50051
 
-EXPOSE 50051
+EXPOSE ${SHIPPING_SERVICE_PORT}
 ENTRYPOINT ["/shippingservice"]

src/shippingservice/src/main.rs

@@ -53,7 +53,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     init_logger()?;
     init_tracer()?;
     info!("OTel pipeline created");
-    let port = env::var("PORT").unwrap_or_else(|_| "50051".to_string());
+    let port = env::var("SHIPPING_SERVICE_PORT").expect("$SHIPPING_SERVICE_PORT is not set");
     let addr = format!("0.0.0.0:{}", port).parse()?;
     info!("listening on {}", addr);
     let shipper = ShippingServer::default();