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docker-compose-old.yml

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+# version is now using "compose spec"
+# v2 and v3 are now combined!
+# docker-compose v1.27+ required
+
+services:
+  vote:
+    build: ./vote
+    # use python rather than gunicorn for local dev
+    command: wait-for-it --strict --timeout=60 redis:6379 -- python app.py
+    environment:
+      REDIS_HOST: "redis"
+    depends_on:
+      redis:
+        condition: service_healthy
+    volumes:
+     - ./vote:/app
+    ports:
+      - "5002:80"
+    networks:
+      - front-tier
+      - back-tier
+
+  result:
+    build: ./result
+    # use nodemon rather than node for local dev
+    command: nodemon server.js
+    environment:
+      PORT: "80"
+      PGUSER: "postgres"
+      PGHOST: "db"
+      PGPASSWORD: "postgres"
+      PGDATABASE: "postgres"
+    volumes:
+      - ./result:/app
+    ports:
+      - "5001:80"
+      - "5858:5858"
+    networks:
+      - front-tier
+      - back-tier
+
+  worker:
+    build:
+      context: ./worker
+    environment:
+      PGHOST: "db"
+      PGUSER: "postgres"
+      PGPASSWORD: "postgres"
+      REDIS_HOST: "redis"
+    depends_on:
+      redis:
+        condition: service_healthy
+      db:
+        condition: service_healthy
+    networks:
+      - back-tier
+
+  redis:
+    image: redis:5.0-alpine3.10
+    volumes:
+      - "./healthchecks:/healthchecks"
+    healthcheck:
+      test: /healthchecks/redis.sh
+      interval: "5s"
+    ports: ["6379"]
+    networks:
+      - back-tier
+
+  db:
+    image: postgres:9.4
+    environment:
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "postgres"
+    volumes:
+      - "db-data:/var/lib/postgresql/data"
+      - "./healthchecks:/healthchecks"
+    healthcheck:
+      test: /healthchecks/postgres.sh
+      interval: "5s"
+    networks:
+      - back-tier
+
+  loadbalancer:
+    build:
+      context: ./loadbalancer
+    environment:
+      PORT: 8080
+      VOTE_HOST: "vote"
+      VOTE_PORT: "80"
+      RESULT_HOST: "result"
+      RESULT_PORT: "80"
+    depends_on:
+      redis:
+        condition: service_healthy
+      db:
+        condition: service_healthy
+    ports:
+      - "5000:8080"
+    networks:
+      - front-tier
+
+volumes:
+  db-data:
+
+networks:
+  front-tier:
+  back-tier: