containers101

README.md

This gist files belong to Containers 101.

creating-swarm-services.sh

docker service create --replicas 1 --name demo -p 80:8080 firatkucuk/demo
docker service ls

docker service inspect --pretty demo
docker service ps demo

docker service scale demo=5
docker service ps demo
docker service rm demo

docker-compose.yml

version: "3.9"
    
services:
  db:
    image: mysql:5.7
    volumes:
      - db_data:/var/lib/mysql
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: somewordpress
      MYSQL_DATABASE: wordpress
      MYSQL_USER: wordpress
      MYSQL_PASSWORD: wordpress
    
  wordpress:
    depends_on:
      - db
    image: wordpress:latest
    volumes:
      - wordpress_data:/var/www/html
    ports:
      - "8000:80"
    restart: always
    environment:
      WORDPRESS_DB_HOST: db
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: wordpress
      WORDPRESS_DB_NAME: wordpress
volumes:
  db_data: {}
  wordpress_data: {}

docker-machine-test.sh

docker-machine create manager
docker-machine create worker1
docker-machine create worker2

docker-machine ssh manager

# $ ifconfig
# $ docker swarm init --advertise-addr 192.168.99.105
docker-machine ssh worker1
# $ docker swarm join ..
docker-machine ssh worker2
# $ docker swarm join ..

docker node ls

docker-service-discovery.sh

docker network create --driver overlay --subnet=10.0.9.0/24 my-net

docker service create --network my-net --name wp-mysql -e MYSQL_ROOT_PASSWORD=abc123 -e MYSQL_USER=wordpress -e MYSQL_PASSWORD=wordpress -e MYSQL_DATABASE=wordpress -d mysql:5.7

docker service create --network my-net --name wordpress -p 80:80 -d wordpress

Dockerfile

FROM node:10

ADD server.js server.js

EXPOSE 8080

CMD [ "node", "server.js" ]

evennumbers.js

let evens = [];

for (let i = 0; i < 10000000; i++) {
    if (i % 2 == 0) {
        console.log(i);
        evens.push(i);
    }
}

linking-containers.sh

docker run --name wordpress-mysql \
    -e MYSQL_ROOT_PASSWORD=abc123 \
    -e MYSQL_USER=wordpress \
    -e MYSQL_PASSWORD=wp123 \
    -e MYSQL_DATABASE=wpdb \
    -d mysql:5.7

docker run --name wordpress \
    --link wordpress-mysql:mysql \
    -e WORDPRESS_DB_HOST=mysql \
    -e WORDPRESS_DB_USER=wordpress \
    -e WORDPRESS_DB_PASSWORD=wp123 \
    -e WORDPRESS_DB_NAME=wpdb \
    -p 80:80 \
    -d wordpress

pushing-to-registry.sh

docker build -t firatkucuk/demo .
docker run -it --rm -p 8080:8080  firatkucuk/demo
docker login
docker push firatkucuk/demo

server.js

var http = require('http');

// Create a server object:
http.createServer(function (req, res) {
  res.write('Hello World!'); // Write a response to the client
  res.end(); // End the response
}).listen(8080); // Server listens on port 8080

show-me-containers.sh

docker run httpd

# finding internal IP address
docker inspect

docker run -d -p 9191:80 httpd

docker stop <container name>
docker rm <container name>

docker run -d --name myweb -p 9191:80 httpd