Docker presentation

# <h1>Intro to Docker</h1>

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  # Prep
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###  Download the following:

###- [Docker](https://download.docker.com/mac/stable/Docker.dmg)

###- [MySQLWorkbench](https://dev.mysql.com/downloads/workbench/)

###- [Resource files](http://hashbytes.com/)

]

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# What is Docker?

Docker is a platform for developers to build, run, and share applications with containers.

???

Docker is a platform for developers and sysadmins to build, run, and share applications with containers. 
The use of containers to deploy applications is called containerization. 
Containers are not new, but their use for easily deploying applications is.

Docker is a set of platform as a service products that uses OS-level virtualization 
to deliver software in packages called containers. 
Containers are isolated from one another and bundle their own software, 
libraries and configuration files; they can communicate with each other through well-defined channels.

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# Images and containers

You build images, you create/run/start containers

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Fundamentally, a container is nothing but a running process, with some added encapsulation features applied to it in order to keep it isolated from the host and from other containers. One of the most important aspects of container isolation is that each container interacts with its own private filesystem; this filesystem is provided by a Docker image. An image includes everything needed to run an application - the code or binary, runtimes, dependencies, and any other filesystem objects required.

Container is the actual instantiation of the image just like how an object is an instantiation or an instance of a class. A Docker image packs up the application and environment required by the application to run, and a container is a running instance of the image

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# Docker vs. Virtual Machines?

???
Docker is a platform for developers and sysadmins to build, run, and share applications with containers. The use of containers to deploy applications is called containerization. Containers are not new, but their use for easily deploying applications is.

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## My Patent - 2002
Workload balancing using dynamically allocated virtual servers
http://www.freepatentsonline.com/7080378.html

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# Images and containers

You build images, you create/run/start containers

???

# Check
docker -v

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# MySQLWorkbench

/Applications/MySQLWorkbench.app/Contents/MacOS/MySQLWorkbench --help

open MySQLWorkbench.app

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# Hello world

docker run hello-world

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# Ubuntu

docker run -it ubuntu bash

docker run -it --name my-ubuntu ubuntu bash

exit

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# Dockerfile

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.left-column[
  ## Next Sections
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  The upcoming sections will discuss the following subjects:

- Listing images, listing containers, etc.

- Clean up - removing images and containers

- Running a container in interactive mode
]

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## Useful commands - Containers

### docker ps -a

### docker stop $(docker ps -aq) && docker rm $(docker ps -aq)

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## Useful commands - Images

### docker images

### docker rmi $(docker images -q)

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# Building a MySQL image

## Build a custom MySQL image

### docker rmi $(docker images -q)

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# Official MySQL image

## [Official MySQL image](https://hub.docker.com/_/mysql)

### docker rmi $(docker images -q)

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# MySQL Dockerfile
```dockerfile
# Derived from official mysql image (our base image)
FROM mysql
# Add a database
ENV MYSQL_DATABASE HR
# Add the content of the sql-scripts/ directory to your image
# All scripts in docker-entrypoint-initdb.d/ are automatically
# executed during container startup
COPY ./sql-scripts/HR/ /docker-entrypoint-initdb.d/
```
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# MySQL Dockerfile

cd $ROOT

docker rmi $(docker images -q my-mysql-image)

docker build -t my-mysql-image .

docker images

docker run -d -p 3366:3306 --name my-mysql -e MYSQL_ROOT_PASSWORD=supersecret my-mysql-image

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# MySQL

docker exec -it my-mysql bash

mysql -uroot -p

supersecret

show databases;

use HR;

show tables;

show columns from employees;

select * from employees;

quit

exit

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# phpMyAdmin

docker run --name my-own-phpmyadmin -d --link my-mysql:db -p 8081:80 phpmyadmin/phpmyadmin

http://localhost:8081/