Part 2 exercises

Part2/Exercise01/docker-compose.yml

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+version: '3.8'
+
+services:
+
+  simple-web-service:
+    image: devopsdockeruh/simple-web-service
+    build: .
+    volumes:
+      - ./text.log:/usr/src/app/text.log

Part2/Exercise02/docker-compose.yml

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+version: '3.8'
+
+services:
+  simple-web-service:
+    image: devopsdockeruh/simple-web-service
+    command: "server"
+    ports:
+      - 8080:8080

Part2/Exercise03/docker-compose.yml

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+version: '3.8'
+
+services:
+  backend:
+    image: example-backend:1.14
+    ports:
+      - 8080:8080
+  frontend:
+    image: example-frontend:1.14
+    ports:
+      - 5000:5000

Part2/Exercise04/docker-compose.yml

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+version: '3.8'
+
+services:
+  backend:
+    image: example-backend:1.14
+    ports:
+      - 8080:8080
+    environment:
+      - REDIS_HOST=cache
+  frontend:
+    image: example-frontend:1.14
+    ports:
+      - 5000:5000
+  redis:
+    image: redis:7.0.9
+    container_name: cache

Part2/Exercise05/command.txt

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+docker compose up --scale compute=2

Part2/Exercise06/docker-compose.yml

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+version: '3.9'
+
+services:
+  db:
+    image: postgres:15.2-alpine
+    environment:
+      - POSTGRES_PASSWORD=postgres
+    container_name: db
+  backend:
+    image: example-backend:1.14
+    ports:
+      - 8080:8080
+    environment:
+      - REDIS_HOST=cache
+      - POSTGRES_HOST=db
+      - POSTGRES_PASSWORD=postgres
+    depends_on:
+      - db
+  frontend:
+    image: example-frontend:1.14
+    ports:
+      - 5000:5000
+  redis:
+    image: redis:7.0.9
+    container_name: cache

Part2/Exercise07/docker-compose.yml

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+version: '3.9'
+
+services:
+  db:
+    image: postgres:15.2-alpine
+    environment:
+      - POSTGRES_PASSWORD=postgres
+    container_name: db
+    volumes:
+      - ./data:/var/lib/postgresql/data
+
+  backend:
+    image: example-backend:1.14
+    ports:
+      - 8080:8080
+    environment:
+      - REDIS_HOST=cache
+      - POSTGRES_HOST=db
+      - POSTGRES_PASSWORD=postgres
+    depends_on:
+      - db
+  frontend:
+    image: example-frontend:1.14
+    ports:
+      - 5000:5000
+  redis:
+    image: redis:7.0.9
+    container_name: cache

Part2/Exercise08/docker-compose.yml

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+version: '3.9'
+
+services:
+  db:
+    image: postgres:15.2-alpine
+    environment:
+      - POSTGRES_PASSWORD=postgres
+    container_name: db
+    volumes:
+      - ./data:/var/lib/postgresql/data
+
+  backend:
+    image: example-backend:1.14
+    environment:
+      - REDIS_HOST=cache
+      - POSTGRES_HOST=db
+      - POSTGRES_PASSWORD=postgres
+    container_name: back
+    depends_on:
+      - db
+
+  frontend:
+    image: example-frontend:1.14
+    container_name: front 
+
+  redis:
+    image: redis:7.0.9
+    container_name: cache
+
+  proxy:
+    image: nginx:1.23.3
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf:ro
+    ports:
+      - 80:80
+    depends_on:
+      - backend
+      - frontend

Part2/Exercise08/nginx.conf

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+events { worker_connections 1024; }
+
+http {
+	server {
+		listen 80;
+		location / {
+			proxy_pass http://front:5000;
+		}
+
+		# configure here where requests to http://localhost/api/...
+		# are forwarded
+		location /api/ {
+			proxy_set_header Host $host;
+			proxy_pass http://back:8080/;
+		}
+	}
+}

Part2/Exercise09/Dockerfile_back

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+FROM golang:1.16
+EXPOSE 8080
+WORKDIR /usr/src/app
+COPY . .
+ENV REQUEST_ORIGIN=http://devops/
+RUN go build
+CMD ["./server"]

Part2/Exercise09/Dockerfile_front

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+FROM node:16.19
+EXPOSE 5000
+WORKDIR /usr/src/app
+COPY package*.json ./
+COPY . .
+ENV REACT_APP_BACKEND_URL=http://devops/api
+RUN npm install && npm run build
+RUN npm install -g serve
+CMD ["serve", "-s", "-l", "5000", "build"]

Part2/Exercise09/changes.txt

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+I changed REQUEST_ORIGIN in the backend from http://devops:5000 to http://devops/ and BACKEND_URL from http://devops:8080 to http://devops/api.
+
+I alson updated the image versions in docker-compose.yml to match the new images.

Part2/Exercise09/docker-compose.yml

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+version: '3.9'
+
+services:
+  db:
+    image: postgres:15.2-alpine
+    environment:
+      - POSTGRES_PASSWORD=postgres
+    container_name: db
+    volumes:
+      - ./data:/var/lib/postgresql/data
+
+  backend:
+    image: example-backend:2.9
+    environment:
+      - REDIS_HOST=cache
+      - POSTGRES_HOST=db
+      - POSTGRES_PASSWORD=postgres
+    container_name: back
+    depends_on:
+      - db
+
+  frontend:
+    image: example-frontend:2.9
+    container_name: front 
+
+  redis:
+    image: redis:7.0.9
+    container_name: cache
+
+  proxy:
+    image: nginx:1.23.3
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf:ro
+    ports:
+      - 80:80
+    depends_on:
+      - backend
+      - frontend

Part2/Exercise09/nginx.conf

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+events { worker_connections 1024; }
+
+http {
+	server {
+		listen 80;
+		location / {
+			proxy_pass http://front:5000;
+		}
+
+		# configure here where requests to http://localhost/api/...
+		# are forwarded
+		location /api/ {
+			proxy_set_header Host $host;
+			proxy_pass http://back:8080/;
+		}
+	}
+}

Part2/Exercise10/docker-compose.yml

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+version: '3.9'
+
+services:
+  db:
+    image: postgres:15.2-alpine
+    environment:
+      - POSTGRES_PASSWORD=postgres
+    container_name: db
+    volumes:
+      - ./data:/var/lib/postgresql/data
+
+  backend:
+    image: example-backend:2.9
+    environment:
+      - REDIS_HOST=cache
+      - POSTGRES_HOST=db
+      - POSTGRES_PASSWORD=postgres
+    container_name: back
+    depends_on:
+      - db
+
+  frontend:
+    image: example-frontend:2.9
+    container_name: front 
+
+  redis:
+    image: redis:7.0.9
+    container_name: cache
+
+  proxy:
+    image: nginx:1.23.3
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf:ro
+    ports:
+      - 80:80
+    depends_on:
+      - backend
+      - frontend

Part2/Exercise10/explanation.txt

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+I had already naturally removed the ports from the docker-compose.yml when I did the proxy setup.