eduardobcolombo / dockermodels

Do a demo with Docker step by step for php developers.

Docker for PHP projects, with Apache and MySQL

Objective: Do a demo with Docker step by step for php developers.

Notes: Consider that the docker and docker-compose are installed and working.
If you need help go to: https://docs.docker.com/engine/installation/linux/fedora/ and https://docs.docker.com/compose/install/
To this tutorial I used Fedora 23, Docker 1.12.0 and docker-compose 1.8.0.

What is Docker? (docker.com)

Docker is the world's leading software containerization platform. Docker containers wrap a piece of software in a complete filesystem that contains everything needed to run: code, runtime, system tools, system libraries – anything that can be installed on a server. This guarantees that the software will always run the same, regardless of its environment. How to use Docker in PHP projects? Basically, we need to write a file called Dockerfile, containing the information about requirements to be installed in this container (eg.. webserver), such as operational system or image, libraries we want to use with our application. Remember that the easiest way to deployment, it's to create an infrastructure identical the deploy environment. To help us, we would use that docker-compose. It is an orchestration utilities to organize several machines/containers. e.g. A webserver and a database server. To use docker-compose, we write a file called docker-compose.yml. In this file, we put the information about the machines/containers, environment variables, Dockerfiles references or images and also to define the information according to environment development, to share the folder of our application with webserver to facilitate and accelerate the workflow. Below you can look the commented files to better understanding.

Look this files in the repository

Dockerfile
docker-compose.yml
DockerfileDB

After definitions of our files docker-compose.yml and Dockerfile, we need know some fundamental commands to use the docker-compose: docker-compose build – compile and configure the containers based in our dockerfiles and docker-compose.yml. Depending on the amount of extensions of PHP, or other instalations through of RUN command, it can get slow, because it may need to download some package, compile… Take it easy.

docker-compose up – up our containers, create and initialize the containers. After using the docker-compose up, we can now access our application and also check our dockers running. If you type on the terminal this command, it will lock your terminal. To stop press Ctrl+c.

Well done, let's go to put up our containers.

docker-compose build
docker-compose up

docker ps – shows containers that are running. If we type this command it will look something like this:

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 35554b895a39 modelo_web "apache2-foreground" 33 seconds ago Up 27 seconds 0.0.0.0:8889->80/tcp modeloPHP5.4-Apache d6a578cf7254 mysql:5.7 "docker-entrypoint.sh" 43 seconds ago Up 37 seconds 3306/tcp modeloMySQL

Note that our two containers are running, and the name configured on docker-compose.yml are in column NAMES. It is easy to identify.

docker images – shows the images available on your machine
docker-compose down – ends and removes our containers, networks, images and volumes.
docker-compose –-help – shows how to use docker-compose, it is good.

Now, we can go to http://127.0.0.1:8889. We see our application that are on folder www. To test we put in this folder a file index.php with , it shows the php informations. When you go to the url above you see something like this:

Well done! Now, we can add to our index.php some tests. A mysql connection as below:

Look this file in the repository index.php

Now, if we go to our url, it will look something like this:

Connected with mysql_connect Success with mysqli connection at ... db via TCP/IP

And PHP informations...

Successful, now we can work with simple projects PHP using docker.

If you want access your database mysql of container, simply use your mysql client, as mysql-front (windows), Mysql Workbench, or if you use PHPStorm, simply add your database. Remember to configure the correct port. In this case you can use url 127.0.0.1 and port 3307 with username and password setted on file docker-compose.yml

To put up or down your containers you can use docker-compose up and Ctrl + c, however you can also use the argument start and stop too. Remember that, when you need to clean up your containers on your machine, you can use docker-compose down and, to remove your containers, use the argument remove.

Also remember, that docker-compose stop or Ctrl + c, do not delete your database informations, however if you use docker-compose down, remove all data of your containers. But, if you need again this container on future, simply type docker-compose up, and you have the same data, username, password, but the database only with your dump.sql.

Referências:
https://docs.docker.com/v1.8/compose/yml/
https://github.com/romeOz/docker-apache-php
https://hub.docker.com/_/php/
https://hub.docker.com/_/mysql/