Developing and Deploying PHP with Docker

Developing and Deploying
PHP with Docker
Midwest PHP 2015

Patrick Mizer
SpareFoot - Austin, TX
ZCE: PHP4, PHP5, ZF
We use Docker at SpareFoot:
● Containers for PHP services in dev
● CI server builds and deploys containers
● Containers in production for Solr Search and Node.js
apps

First, what I am NOT going to cover

Docker internals
○ LXC Containers
■ Kernel namespacing (pid, mnt, net, user, ipc)
■ Control groups (blkio, cpu, devices)

The Docker - CoreOS Debate
○ Rocket vs Docker
○ Whether everything running through one daemon is
a security risk
○ Whether Docker is a platform or a composable
building block

What I am going to cover
● What is Docker?
● Why you should care about Docker
● How Docker works
● Building a Docker container for a PHP
application
● Docker tools
○ Compose
○ Docker-Machine
○ Swarm
● Live demos (time permitting)

What is Docker?
Docker is an open platform for developers and
sysadmins to build, ship, and run distributed
applications.
Docker enables apps to be quickly assembled
from components and eliminates the friction
between development, QA, and production
environments.

Oh, so it’s a Virtual Machine?

Physical Server
Host OS
Libs
App
Traditional server model

Physical Server
Host OS
Libs
App
Physical Server
Host OS
Hypervisor
Guest OS
Libs
App
Guest OS
Libs
App
Traditional server model Virtual machine model

Physical Server
Host OS
Hypervisor
Guest OS
Libs
App
Guest OS
Libs
App
Virtual machine model

Physical Server
Host OS
Hypervisor
Guest OS
Libs
App
Guest OS
Libs
App
Physical Server
Host OS
Docker Engine
Libs
App
Libs
App
Virtual machine model Docker model

Physical Server
Host OS
Docker Engine
Libs
App
Libs
App Docker Containers
● Smaller than VMs (no O/S)
● Isolation of VMs without overhead
The Container

The Container Metaphor
Things to
ship
Platforms
for shipped
goods

Technologies Platforms

Platforms

Why should you care about Docker?

Why you should care
● Portable runtime environment for your code
○ Stable dev environment
○ Build once, run anywhere*

Why you should care
● Immutable build artifacts
○ Avoid dependency hell
○ Avoid “drift”

Why you should care
■ New technologies!
● Immutable build artifacts
○ Avoid dependency hell
○ Avoid “drift”
● Clear separation of concerns
○ Dev - Code, Dependencies, Libs
○ DevOps - Provisioning, Logging, Network

Stable Dev Environment
Virtual Machine
% vagrant up

But how do you model this?
Presentation
Service
Data
[ JSON / REST API ]

% vagrant up

PHP App 1
Redis Cache
Solr Search
MySQL DB
Virtual Machine
Containers
% vagrant up
PHP App 2

Developers
Inside the container:
● Code
● Libraries
● Package Manager
● Data

DevOps
Outside the container:
● Logging
● Monitoring
● Network Configuration

Immutable Build Artifacts
2.4.10
5.6.5
5.6.23
5.5.21
5.6.23
2.4.12
5.5.21
5.6.3
2.4.09
14.10
14.04
Production
Development
Local

2.4.10
5.6.5
5.6.23
5.5.21
5.6.23
2.4.12
5.5.21
5.6.3
2.4.09
14.10
14.04

14.10
14.04
Production
Development
Local 2.4.12
5.6.7
2.4.10
5.5.0
2.4.10
5.5.0

14.10
14.04
2.4.12
5.6.7
2.4.10
5.5.0
2.4.10
5.5.0

14.10
14.04
2.4.12
5.6.7
2.4.10
5.5.0
2.4.10
5.5.0
2.4.12
5.6.7

14.10
14.04
2.4.12
5.6.7
2.4.10
5.5.0
2.4.10
5.5.0
2.4.12
5.6.7
2.4.12
5.6.7

14.10
14.04
2.4.12
5.6.7
2.4.10
5.5.0
2.4.10
5.5.0
2.4.12
5.6.7
2.4.12
5.6.7
OpsDev

Docker Concepts
Docker Daemon
Container 1
Container 2
Container 3
Container N
Docker CLI
docker ps
docker pull
docker run
docker kill
...
Docker Host Docker Registry
Image 1
Image 2
Image 3
Image N

Building our first container
% mkdir first
% cd first
% touch index.php
% touch Dockerfile

index.php
<?php
echo “Hello world”;
?>

The Dockerfile
FROM ubuntu:trusty
RUN apt-get update &&
apt-get -y install php5-cli
ADD . /app
WORKDIR /app
EXPOSE 8080
CMD ["php", "-S", "0.0.0.0:8080"]

The Dockerfile
FROM ubuntu:trusty
ADD . /app
WORKDIR /app
EXPOSE 8080
CMD ["php", "-S", "0.0.0.0:8080"]
The Docker way:
1 process per container

The Dockerfile
FROM ubuntu:trusty
ADD . /app
WORKDIR /app
EXPOSE 8080
CMD ["php", "-S", "0.0.0.0:8080"]
I’m Lazy:
/usr/sbin/apache2ctl -D FOREGROUND

Build our image
% docker build -t mizer/helloworld .

Build our image
Docker Daemon
Docker CLI
docker build -t
mizer/helloworld
.
mizer/helloworld
ubuntu

The Dockerfile
FROM ubuntu:trusty
ADD . /app
WORKDIR /app
EXPOSE 8080
CMD ["php", "-S", "0.0.0.0:8080"]
step 0
step 1
step 2
step 4
step 5
step 3
Each step is cached :)

Run our first container
% sudo docker run -p 8080:8080
--name hello_1 -d mizer/helloworld

Run our first container
Docker Daemon
Docker CLI
docker run -p 8080:8080
--name hello_1 -d
mizer/helloworld
mizer/helloworld
hello_1

Check our running containers
% docker ps

% docker ps
CONTAINER ID IMAGE COMMAND PORTS NAMES
5f1b82bb90b8 mizer/helloworld:latest "php -S 0.0.0.0:8080 8080->8080/tcp hello_1

Create another
% docker run -p 8181:8080

Docker Concepts
Docker Daemon
Docker CLI
--name hello_2 -d
mizer/helloworld
mizer/helloworld
hello_1
hello_2

% docker ps
CONTAINER ID IMAGE COMMAND PORTS NAMES
5f1b82bb90b8 mizer/helloworld:latest "php -S 0.0.0.0:8080 8080->8080/tcp hello_1
3d1b8ccb80c7 mizer/helloworld:latest "php -S 0.0.0.0:8080 8181->8080/tcp hello_2

Let’s remove both containers
% sudo docker rm -f hello_1 hello_2

Let’s remove both containers
Docker Daemon
Docker CLI
docker rm -f hello_1
hello_2
mizer/helloworld

… and the image
% sudo docker rmi -f mizer/helloworld

… and the image
Docker Daemon
Docker CLI
--name hello_2 -d
mizer/hello

Creating a base image
FROM ubuntu:trusty
% docker build -t mizer/php

Docker Daemon
Docker CLI
docker build -t
mizer/php .
mizer/php

Using our base image
FROM mizer/php:latest
ADD . /app
WORKDIR /app
EXPOSE 8080
CMD ["php", "-S", "0.0.0.0:8080"]
% sudo docker build -t
mizer/helloworld .

Docker Daemon
Docker CLI
docker build -t
mizer/php .
mizer/php
mizer/helloworld

Create the container
% sudo docker run -p 8080:8080

Create the container
Docker Daemon
Docker CLI
--name hello_1 -d
mizer/hello
mizer/php
mizer/hello
hello_1

Community images
% docker search php

Community images
% docker search php
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
php While designed for web development, the PH... 148 [OK]
tutum/apache-php Apache+PHP base image - listens in port 80... 59 [OK]
maxexcloo/nginx-php Docker framework container with Nginx and ... 30 [OK]
eboraas/apache-php PHP5 on Apache (with SSL support), built o... 17 [OK]
richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable ... 10 [OK]
php-zendserver Zend Server - the integrated PHP applicati... 10 [OK]
clue/phpvirtualbox phpVirtualBox is a modern web interface de... 9 [OK]
jdeathe/centos-ssh-apache-php CentOS-6 6.5 x86_64 / Apache / PHP / PHP m... 8 [OK]
jprjr/php-fpm Arch Linux-based image with PHP-FPM instal... 8 [OK]
darh/php-essentials Provides a container full of php-cli tools... 7 [OK]
million12/nginx-php Nginx + PHP-FPM, CentOS-7 based. 5 [OK]
reinblau/php-apache2 Apache2 Server for PHP Projects 4 [OK]
eriksencosta/php-dev Docker image with latest supported PHP ver... 4 [OK]
alreece45/phusion-nginx-php nginx and php-fpm with configurable docume... 3 [OK]
million12/php-app-ssh million12/php-app, extended with SSHD and ... 2 [OK]
simpledrupalcloud/php 1 [OK]
yoshz/apache-php-dev A docker image with Apache, PHP 5.5, drush... 1 [OK]
azukiapp/php-apache Base docker image to run PHP applications ... 1 [OK]

A modern architecture
Presentation
Service
Data
[ JSON / REST API ]

A modern architecture
Docker Daemon
Docker CLI
mizer/php
mizer/web
web_1
service_1
data_1
mizer/service
mizer/data
mizer/mysql
mizer/data

Docker Orchestration
● Compose
● Machine
● Swarm

Fig Docker Compose
Compose is a tool for defining and running
complex applications with Docker. With
Compose, you define a multi-container
application in a single file, then spin your
application up in a single command which does
everything that needs to be done to get it
running.

docker-compose.yml
webapp1:
build: webapp/.
command: php -S 0.0.0.0:8000 -t /code
ports:
- "8000:8000"
environment:
- DSN=mysql:host=mysql;dbname=test
- USERNAME=test
- PASSWORD=foo
links:
- mysql

Docker Compose
% docker-compose up

Docker-compose
Docker Daemon
Docker CLI
mizer/php
mizer/web
web_1
service_1
data_1
mizer/service
mizer/data
mizer/mysql
mizer/data
docker-compose.yml
% docker-compose up

Docker Machine
Docker Machine takes you from zero-to-Docker in
seconds with a single command.
Before Docker Machine, a developer would need to log in
to the host and follow installation and configuration
instructions specifically for that host and its OS. With
Docker Machine, whether provisioning the Docker daemon
on a new laptop, on virtual machines in the data center, or
on a public cloud instance, the same, single command.

Swarm
Docker CLI
Docker Daemon
Container 1
Container 2
Container 3
Docker Host
Docker Daemon
Container 1
Container 2
Container 3
Docker Host
Docker Daemon
Container 1
Container 2
Container 3
Docker Host
Docker-machine

Docker Swarm
Docker Swarm is native clustering for Docker. It turns a
pool of Docker hosts into a single, virtual host.
Swarm serves the standard Docker API, so any tool which
already communicates with a Docker daemon can use
Swarm to transparently scale to multiple hosts: Dokku,
Compose, Krane, Flynn, Deis, DockerUI, Shipyard, Drone,
Jenkins... and, of course, the Docker client itself.

“Cows not pets”
Pets
● Pets have names
● They are unique, loving, hand
raised and cared for
● When they are sick, they are
taken to the vet.

“Cows not pets”
Pets
● Pets have names
● They are unique, loving, hand
raised and cared for
● When they are sick, they are
taken to the vet.
Cows
● Cows have numbers
● They are not unique, they are a
commodity.
● When they are sick....?

Swarm
Docker CLI
Docker Daemon
Container 1
Container 2
Container 3
Docker Host
Docker Daemon
Container 1
Container 2
Container 3
Docker Host
Docker Daemon
Container 1
Container 2
Container 3
Docker Host
Swarm

Thank you!
patrick@sparefoot.com
Github: https://github.com/maximizer
● I put all of the examples in
docker-midwestphp15
https://joind.in/13076

Developing and Deploying PHP with Docker

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