# Lab 10. System and Network administartion
## Timur Mustafin

# Load balancing with nginx

### Load balancer
#### Nginx config

http {
    upstream myapp1 {
        server node1;
        server node2;
    }

    server {
        listen 80;

        location / {
            proxy_pass http://myapp1;
        }
    }
}
events {}

#### Dockerfile

FROM nginx:latest

COPY nginx.conf /etc/nginx/nginx.conf

### Node
#### Nginx
uses default config (serves default page)

#### Dockerfile

FROM nginx:latest

#### docker-compose

version: "3"
services:
  node1:
    build: .
    ports:
      - 80
    networks:
      - internal

  node2:
    build: .
    ports:
      - 80
    networks:
      - internal

  nginx:
    build: nginx/
    ports:
      - 80:80
    networks:
      - internal


networks:
  internal:

## Verification
start the service, both nodes are working


Destroy one node with `docker stop`

After a few 499(i updated the page in a browser) it always uses one node with normal 344 response