Gianluca Arbezzano discusses using Docker and related technologies to scale WordPress deployments. Docker provides isolation and security while allowing workloads to scale horizontally across multiple servers. Elastic Container Service on AWS further simplifies management by allowing containers to be orchestrated across a cluster of EC2 instances and auto-scaled based on demand. HAProxy can also help load balance traffic between containers for high availability.

1. Wordpress
Scalability with Docker
Created by Gianluca Arbezzano

2. Gianluca Arbezzano
Full Stack Developer
Maintainer Doctrine Module and
open source contributor
github.com/gianarb
twitter.com/gianarb

3. Keywords

4. Isolation
To increase control of system

5. Isolation
To mitigate the security issue

6. Isolation
To gurantee scalability

7. Scalability

8. What is scalabily?
Scalability <=> High avalability.
Scalability is the ability of a system,
network, or process to handle a growing
amount of work in a capable manner or its
ability to be enlarged to accommodate
that growth.
cit. Wikipedia.

9. There are two types of scalability

10. Vertical scalability

11. Horizontal scalability

12. Hourly metric

13. The traffic is a peaks's issue

14. Your server supports all traffic ALWAYS

15. The differce between this peaks for a lot of time is unused

16. you pay it!

17. Our infrastructure

18. There are other problems
Disaster recovery

19. Your switchboard scale?

20. There are other problems
Isolation
Scalability
Monitoring
freedom and security

21. we submerged by problems
and we hide a lot of them!

22. Choice your environment
by DigitalOcean - Erika Heidi

23. I know what you think..
Each application require its server!
cit. strong sysadmin
I am here to apply this concept at your experience

24. Why AWS?

25. Elastic Container Service

26. Elastic Container Service

27. Linux Container LXC
it is an operating-system-level virtualization environment
for running multiple isolated Linux systems (containers) on a
single Linux control host.

28. Linux Container LXC
it is an operating-system-level virtualization environment
for running multiple isolated Linux systems (containers) on
a single Linux control host.
I love Wikipedia

29. Docker
Docker containers wrap up a piece of software in a complete
filesystem that contains everything it needs to run: code,
runtime, system tools, system libraries – anything you can
install on a server

30. Docker
Commands:
attach Attach to a running container
build Build an image from a Dockerfile
images List images
kill Kill a running container
logs Fetch the logs of a container
ps List containers
restart Restart a container
rm Remove one or more containers
rmi Remove one or more images
run Run a command in a new container
search Search the Docker Hub for images
start Start one or more stopped containers
stop Stop a running container

31. MySQL - dockerfile
FROM ubuntu
RUN dpkg-divert --local --rename --add /sbin/initctl
RUN ln -s /bin/true /sbin/initctl
RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/
RUN apt-get update
RUN apt-get -y install mysql-server
EXPOSE 3306
CMD ["/usr/bin/mysqld_safe"]

32. Apache - dockerfile
FROM php:5.6-apache
RUN a2enmod rewrite
RUN apt-get update && apt-get install -y libpng12-dev libjpeg-dev
&& rm -rf /var/lib/apt/lists/*
&& docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr
&& docker-php-ext-install gd
RUN docker-php-ext-install mysqli
VOLUME /var/www/html
RUN curl -o wordpress.tar.gz -SL https://wordpress.org/wordpress.tar.gz
&& tar -xzf wordpress.tar.gz -C /usr/src/
&& rm wordpress.tar.gz
&& chown -R www-data:www-data /usr/src/wordpress
CMD ["apache2-foreground"]

33. Create mysql container
docker build -t gianarb/mysql .
Same stuff for wordpress

34. Run all
docker run -t db -p 3306:3306 gianarb/mysql
docker run -p 8080:80 -d --name wp1 --link mysql:mysql wordpress

35. docker compose
Compose is a tool for defining and running multi-container
Docker applications. With Compose, you use a Compose file
to configure your application’s services.

36. docker compose
wp:
image: wordpress
ports:
- 8081:80
environment:
WORDPRESS_DB_HOST: mysql
WORDPRESS_DB_USER: root
WORDPRESS_DB_PASSWORD: help_me
links:
- mysql:mysql
mysql:
image: mysql:5.7
environment:
MYSQL_ROOT_PASSWORD: help_me

37. docker compose
Commands:
build Build or rebuild services
logs View output from containers
ps List containers
pull Pulls service images
restart Restart services
rm Remove stopped containers
run Run a one-off command
scale Set number of containers for a service
start Start services
stop Stop services
up Create and start containers

38. Elastic Container Service
it is a highly scalable, fast, container management service
that makes it easy to run, stop, and manage Docker
containers on a cluster of Amazon EC2 instances
by AWS

39. Elastic Container Service
Container instance: An Amazon EC2 that is running the
Amazon ECS Agent. It has been registered to ECS Cluster

40. Elastic Container Service
Cluster: It is a pool of Container instances

41. Elastic Container Service
Task definition: A description of an application that
contains one or more container definitions
{
"family": "",
"containerDefinitions": [
}
}
Each Task definition running is a Task

42. ECS in practice
ecs-cli configure
--region eu-west-1
--cluster wps
--access-key apikey
--secret-key secreyKey
Create your cluster and confiugre your cli

43. ECS in practice
ecs-cli up --keypair codemotion-ecs
--capability-iam
--size 1
--instance-type t2.medium
Configure Cluster and start first EC2

44. ECS in practice
ecs-cli compose --file docker-compose.yml
--project-name wp1 up
Up your first wordpress task, wp1

45. ECS in practice
ecs-cli ps
See status of your tasks

46. ECS in practice
COMMANDS:
configure Configures your AWS credentials
up Create the ECS Cluster
down Delete the ECS Cluster and associated resources
scale Modify the number of container instances.
ps List all of the running containers.
compose Execute docker-compose style commands
on an ECS cluster.
help, h Shows a list of commands or help for one command
docker-compose style commands?!

47. Now we have 2 wordpress that run on different ports 8080
and 8081
Our problem are not finished

48. HAProxy helps you
high availability, load balancing, and proxying for TCP and
HTTP-based applications. It is particularly suited for very
high traffic web sites and powers quite a number of the
world's most visited ones.

49. HAProxy helps you
...
frontend wp_mananger
bind :80
acl host_wp1 hdr(host) -i wp1.gianarb.it
acl host_wp2 hdr(host) -i wp2.gianarb.it
use_backend backend_wp1 if host_wp1
use_backend backend_wp2 if host_wp2
backend backend_wp1
server server1 54.229.190.73:8080 check
backend backend_wp2
server server2 54.229.190.73:8081 check
Maybe this is not the best solution

50. Nginx could be a Reverse Proxy

51. Consul

52. AWS! AWS! AWS!
You are only a fun boy!

53. Manage a cluster of Linux containers as a single system to
accelerate Dev and simplify Ops.

54. Kubernetes is an open source orchestration system for
Docker containers.

55. Docker Swarm is native clustering for Docker. It allows you
create and access to a pool of Docker hosts using the full
suite of Docker tools

56. Instead of installing packages via yum or apt, CoreOS uses
Linux containers to manage your services at a higher level of
abstraction

57. Try Elastic Container Service
amzn.to/1SbwgcG
Take your coupon

58. Where is your wordpress?!
I don't know
It'll not more a bad response

59. Credits:
engineering.facile.it
docs.aws.amazon.com/cli
docs.docker.com/compose
haproxy.org
youtube.com/docker

60. Thanks!
joind.in/16327
 
gianarb.it