Dockerize gateway

README.md

@@ -21,21 +21,25 @@ cd federated-rails-app
 
 docker-compose up --build
 ```
-Setup db:
+
+Articles and users servers would be acceptable for http://localhost:3001 and http://localhost:3000.
+Gateway - http://localhost:4000
+
+Setup db (on first launch):
 ```bash
 cd federated-rails-app
 
 docker-compose exec users rails db:create db:migrate db:seed
 docker-compose exec articles rails db:create db:migrate db:seed
 ```
-Compose graphql schema:
+
+Compose graphql supergraph schema (if not exists, **before** building container):
 ```bash
 cd gateway
 
 npm install -g @apollo/rover
 rover supergraph compose --config ./supergraph-config.yaml > supergraph.graphql
 ```
-Launch gateway with `node index.js`
 
 ### Reproduce
 Create api-only rails applications (as much as you need):

articles/config/application.rb

@@ -36,5 +36,7 @@ class Application < Rails::Application
     # Middleware like session, flash, cookies can be added back manually.
     # Skip views, helpers and assets when generating a new resource.
     config.api_only = true
+    config.hosts << 'articles'
+    config.hosts << 'localhost'
   end
 end

docker-compose.yml

@@ -5,44 +5,40 @@ services:
     build:
       context: ./users
       dockerfile: Dockerfile
-    depends_on:
-      - users_database
     ports:
       - "3000:3000"
     volumes:
       - users_app:/app
       - users_gem_cache:/usr/local/bundle/gems
-    environment:
-      RAILS_ENV: development
-
-  users_database:
-    image: nouchka/sqlite3:latest
-    volumes:
-      - users_db_data:/root/db
 
   articles:
     build:
       context: ./articles
       dockerfile: Dockerfile
-    depends_on:
-      - articles_database
     ports:
       - "3001:3000"
     volumes:
       - articles_app:/app
       - articles_gem_cache:/usr/local/bundle/gems
-    environment:
-      RAILS_ENV: development
 
-  articles_database:
-    image: nouchka/sqlite3:latest
+  gateway:
+    build:
+      context: ./gateway
+      dockerfile: Dockerfile
+    ports:
+      - "4000:4000"
+    depends_on:
+      - articles
+      - users
     volumes:
-      - articles_db_data:/root/db
+      - gateway:/app
+    environment:
+      USERS_HOST: users:3000
+      ARTICLES_HOST: articles:3000
 
 volumes:
   users_app:
   users_gem_cache:
-  users_db_data:
   articles_app:
   articles_gem_cache:
-  articles_db_data:
+  gateway:

gateway/Dockerfile

@@ -0,0 +1,18 @@
+FROM node:14-alpine
+
+RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app
+
+WORKDIR /home/node/app
+
+COPY package*.json ./
+COPY index.js ./
+
+USER node
+
+RUN npm install
+
+COPY --chown=node:node . .
+
+EXPOSE 4000
+
+CMD [ "node", "index.js" ]