Docker Tutorial

# Docker vs VM
 - light weight
 - access to a bunch of images... docker hub
 - fast

# Docker? It's really not that difficult
 - Dockerfile
 - Image
 - Container
 - Docker compose

# Simple usage
 $ docker run -it ubuntu sh

 alpine

 envs, volumes, ports

# Docker run
 - docker run --name mariadb -e MYSQL_ROOT_PASSWORD=skummet -p 3306:3306 -dt mariadb
 - docker run --name nginx -v "$(pwd)":/usr/share/nginx/html:Z -p 8080:80 -d nginx:alpine
 - docker run --name apache-php-app -v "$PWD":/var/www/html -p 8080:80 -d php:7.0-apache
 - docker run -it --rm -v "$PWD":/app -v "$HOME"/.m2:/root/.m2 -w /app -p 8080:8081 maven:3.5-jdk-8-alpine mvn package -Dspring.profiles.active=test
 - docker run --rm -v "$PWD":/app -w /app -p 8080:8081 openjdk:8-jre-alpine java -jar -Dspring.profiles.active=test target/*.jar

# Docker exec
 - docker exec -it mariadb bash
 - docker exec -it nginx bash
 - docker exec -it nginx sh
 - apk add bash

# Docker network
 - ping mariadb
 - docker network create tons
 - docker network connect tons mysql
 - docker network connect tons nginx
 - ping mariadb
 - apk update && apk add mysql-client
 - 

# Docker build
 - docker build -t tons .