Specify Alloy ports in Docker compose

not necessary for internal communications but recommended

Author: ppcano

alloy/cloud.alloy

@@ -95,11 +95,15 @@ pyroscope.scrape "application_containers" {
 // Traces
 otelcol.receiver.otlp "default" {
   // https://grafana.com/docs/alloy/latest/reference/components/otelcol.receiver.otlp/
-    
   // configures the default grpc endpoint "0.0.0.0:4317"
-  grpc { }
+  grpc {
+    endpoint = "0.0.0.0:4317"
+  }
+
   // configures the default http/protobuf endpoint "0.0.0.0:4318"
-  http { }
+  http {
+    endpoint = "0.0.0.0:4318"
+  }
 
   output {
     metrics = [otelcol.processor.resourcedetection.default.input]

alloy/local.alloy

@@ -98,10 +98,12 @@ pyroscope.scrape "application_containers" {
 
 // Receive traces and metrics with OTEL setup
 otelcol.receiver.otlp "default" {
+  // configures the default grpc endpoint "0.0.0.0:4317"
   grpc {
     endpoint = "0.0.0.0:4317"
   }
 
+  // configures the default http/protobuf endpoint "0.0.0.0:4318"
   http {
     endpoint = "0.0.0.0:4318"
   }

compose.grafana-cloud.microservices.yaml

@@ -25,6 +25,8 @@ services:
       - --stability.level=public-preview
     ports:
       - "12345:12345"
+      - "4317:4317" # OTLP gRPC
+      - "4318:4318" # OTLP HTTP
     environment:
       QUICKPIZZA_HOST: public-api:3333
       # must be set with an .env file

compose.grafana-cloud.monolithic.yaml

@@ -14,6 +14,8 @@ services:
       - --stability.level=public-preview
     ports:
       - "12345:12345"
+      - "4317:4317" # OTLP gRPC
+      - "4318:4318" # OTLP HTTP
     environment:
       QUICKPIZZA_HOST: quickpizza:3333
       # must be set with an .env file