PHPBenelux Wednesday, October 22, 2014

* Vagrant is a Manager for VMs* Vagrant is a Manager for VMs

* Vagrant is AWESOME!* Vagrant is AWESOME!

* Vagrant Simplified our lives tremendously* Vagrant Simplified our lives tremendously

● * server virtualization is slow* server virtualization is slow● * hard to distribute (compared to docker)* hard to distribute (compared to docker)

● * base box + vagrant provision (puppet, ansible, * base box + vagrant provision (puppet, ansible, saltstack)saltstack)

● * vagrant package --base [hash] --output * vagrant package --base [hash] --output [boxname.box] [boxname.box]

● * fixed memory consumption* fixed memory consumption

● * disk space hog* disk space hog● * service install / remove trials are * service install / remove trials are

expensiveexpensive● * destroy + up is coffee time* destroy + up is coffee time● * hypervisor abstracts an entire device* hypervisor abstracts an entire device● * expensive emulating virtual hardware* expensive emulating virtual hardware

But it ain't good for ...But it ain't good for ...

* Excellent for manual testing* Excellent for manual testing* Excellent for Selenium Grid* Excellent for Selenium Grid* Excellent for taking an OS test drive* Excellent for taking an OS test drive* Excellent for running non linux apps* Excellent for running non linux apps* And probably a lot more!* And probably a lot more!

It ain't all bad!It ain't all bad!

Running or Running or developingdeveloping

a Linux a Linux applicationapplication

Purring power!!!Purring power!!!

"Docker is an open platform for developers "Docker is an open platform for developers and sysadmins to build, ship, and run and sysadmins to build, ship, and run distributed applications."distributed applications."

* dedicated tool to help build stable application * dedicated tool to help build stable application environments environments* distribute those environments easily* distribute those environments easily* low cost install / remove services* low cost install / remove services

> whoami_* built on top of LXC (container technology). * built on top of LXC (container technology).

* uses file system, storage, CPU, RAM, and so on* uses file system, storage, CPU, RAM, and so on

* just abstract the operating system kernel* just abstract the operating system kernel

> ls effect_* more efficient in resource terms* more efficient in resource terms

* leave behind 99.9% VM junk* leave behind 99.9% VM junk

* 4-6 times more server application instances* 4-6 times more server application instances

Terminology

* Image

* Container

* Repository

* Registry

We don't need no stinking

We Need a Dockerfile

FROM debian:wheezy

MAINTAINER Nick Belhomme, contact@nickbelhomme.com

RUN apt-get update

RUN apt-get install -y apache2 wget vim curl

# expose the portsEXPOSE 80

FROM nickbelhomme/apache

RUN a2enmod rewrite

RUN apt-get install -y php5-common libapache2-mod-php5 php5-cli php5-intl php5-curl php5-pgsql

ADD dev/apache/application.conf /etc/apache2/sites-available/application.confRUN a2ensite application.conf

nickbelhomme/apache nickbelhomme/foo

Actually we Need multiple Dockerfiles

1 FOR APACHE (+ PHP)

1 FOR a DB

1 FOR NODE

1 FOR VARNISH

1 FOR MEMCACHED

1 FOR REDIS

1 FOR ...

Or use the Registry for pre-build images

1 PER Application

Forge togetherUsing Containers

docker run -d -P --name postgres nickbelhomme/postgres docker run -d --link postgres:postgres --name applicationFoo -v /home/nick/vhosts/foo/application:/var/www/vhosts/local.foo.com -p 49101:80 nickbelhomme/foo /usr/sbin/apachectl -D FOREGROUND

> docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

e39 node:latest "grunt watch" 5 days ago Up 2 seconds applicationFoo-grunt a2d applicationFoo:latest "apachectl 2 weeks ago Up 2 seconds 49101->80/tcp applicationFoo bda postgres:latest "/usr/lib/postgresql 4 weeks ago Up 3 seconds 49155->5432/tcp fooBar/postgres,applicationFoo/postgres,gooBar/postgres,postgres

http://local.foo.com:49101

/etc/hosts => Docker0-ip local.foo.com

> docker run --rm --link postgres:postgres nickbelhomme/postgres env

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/binHOSTNAME=0bda3edb485ePOSTGRES_PORT=tcp://10.66.33.13:5432POSTGRES_PORT_5432_TCP=tcp://10.66.33.13:5432POSTGRES_PORT_5432_TCP_ADDR=10.66.33.13POSTGRES_PORT_5432_TCP_PORT=5432POSTGRES_PORT_5432_TCP_PROTO=tcpPOSTGRES_NAME=/loving_colden/postgresHOME=/var/lib/postgresql

<?php host=' . getenv('POSTGRES_PORT_5432_TCP_ADDR') ?>

> docker logs –follow applicationFoo-grunt

Done, without errors.Completed in 0.438s at Wed Oct 15 2014 19:06:28 GMT+0000 (UTC) - Waiting...OK>> File "rawJs/foo/form.js" changed.

Running "concat:js" (concat) taskFile "./public/js/source.js" created.

Done, without errors.Completed in 0.458s at Wed Oct 15 2014 19:11:34 GMT+0000 (UTC) - Waiting...Running "watch" task

> docker start postgres applicationFoo applicationFoo-grunt> docker stop postgres applicationFoo applicationFoo-grunt

#!/bin/bashif [ "$1" = "start" ]; thendocker start postgres applicationFoo applicationFoo-gruntexitfiif [ "$1" = "db" ]; thendocker run --rm --link postgres:postgres nickbelhomme/postgres envexitfiif [ "$1" = "grunt" ]; thendocker logs --follow applicationFoo-gruntexitfi

> ./project start> ./project stop> ./project grunt> ./project ...

Team distribution

> docker login

> docker push nickbelhomme/postgres

> docker pull nickbelhomme/postgres

> docker run [options] [container]

> develop

Now some bad ass Super hero

Tips

> docker build -t nickbelhomme/foo .

> docker run --name applicationFoo

> docker run –rm ...

> docker run -w /var/www/vhosts/local.foo.com

> docker run -i -t nickbelhomme/foo /bin/bash

> docker run -v hostDir:containerDir

> docker build –no-cache=true

> docker rm $(docker ps -a -q)

> docker rmi $(docker images -a -q)

> docker rmi $(docker images -q --filter "dangling=true")

> cat /etc/default/docker

# Docker Upstart and SysVinit configuration file

# Customize location of Docker binary (especially for development testing).#DOCKER="/usr/local/bin/docker"

# Use DOCKER_OPTS to modify the daemon startup options.#DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"DOCKER_OPTS="—bip=10.66.33.10/24"

# If you need Docker to use an HTTP proxy, it can also be specified here.#export http_proxy="http://127.0.0.1:3128/"

# This is also a handy place to tweak where Docker's temporary files go.#export TMPDIR="/mnt/bigdrive/docker-tmp"

Change the default Docker network address

*Mounting volumes absolute FROM GUESTdocker run -v /c/Users:containerPath

* hosts file need to be set with 192.168.59.103

Lightweight Tiny Core Linux made for Docker containers. Runs completely from RAM, weighs ~27MB, boots in ~5s

Remember:Keep your docker

Images single responsibility

http://blog.nickbelhomme.com | https://joind.in/12295