feat: Make NATS an optional service via Docker Compose profiles and environment variable configuration.

Author: sonal-aot

docker/m8flow-docker-compose.yml

@@ -66,6 +66,7 @@ services:
       - redis-data:/data
 
   nats:
+    profiles: ["nats"]
     container_name: m8flow-nats
     image: nats:2.10-alpine
     command: ["-js", "--store_dir=/data/nats", "-m", "8222"]
@@ -82,6 +83,7 @@ services:
     restart: unless-stopped
 
   m8flow-nats-consumer:
+    profiles: ["nats"]
     container_name: m8flow-nats-consumer
     build:
       context: ..
@@ -97,10 +99,14 @@ services:
     depends_on:
       nats:
         condition: service_healthy
+        required: false
       m8flow-backend:
         condition: service_started
     environment:
+      M8FLOW_NATS_ENABLED: "${M8FLOW_NATS_ENABLED:-false}"
       M8FLOW_NATS_URL: "nats://nats:4222"
+      M8FLOW_BACKEND_UPGRADE_DB: "false"
+      M8FLOW_BACKEND_SW_UPGRADE_DB: "false"
     volumes:
       - process_models_cache:/app/process_models
       - ../data/m8flow_nats_consumer:/app/data/m8flow_nats_consumer
@@ -210,8 +216,9 @@ services:
         condition: service_started
       nats:
         condition: service_healthy
+        required: false
     environment:
-      M8FLOW_NATS_ENABLED: "true"
+      M8FLOW_NATS_ENABLED: "${M8FLOW_NATS_ENABLED:-false}"
       M8FLOW_NATS_URL: "nats://nats:4222"
 
   m8flow-celery-worker:

sample.env

@@ -157,7 +157,7 @@ MINIO_ROOT_PASSWORD=minioadmin
 M8FLOW_STARTUP_DIAGNOSTICS=false
 
 # --- NATS / Event Driven Architecture ---
-M8FLOW_NATS_ENABLED=true
+M8FLOW_NATS_ENABLED=false
 M8FLOW_NATS_URL=nats://localhost:4222
 M8FLOW_NATS_STREAM_NAME=M8FLOW_EVENTS
 M8FLOW_NATS_SUBJECT=m8flow.events.>