В рамках доклада будут рассмотренные следующие аспекты распределённых приложений: Сервис ориентированная архитектура, жизнь и структура распределённых приложений Основные понятия Docker преимущества и недостатки Service discovery и Failure detection при помощи Consul Orchestration и provisioning Docker контейнеров с помощью Ansible Схема доставки приложений на базе фремворка Symfony 2, организация масштабируемых решений

1. Dockerize Me: Distributed PHP
applications with Symfony, Docker,
Consul and Ansible
Oleksii Petrov
Skelia Ukraine / ETwater Systems
skype: alexhelkar
twitter: @alexhelkar
email: alexhelkar@gmail.com

2. 1. What for the goat needs
an accordion?
Agenda

3. Agenda (real)
1. SOA and Microservices
2. Dockerized infrastructure
3. Cluster Management
4. Service discovery and failure detection
5. Dockerizing Symfony Applications

4. SOA and Microservices:
7 days of app creation

5. Day 0 - In beginning was Word…

6. Day 1
www.example.com
Web server
Application
Database

7. Day 1. Evening

8. Day 2
www.example.com
Web server
Application Database
Cache

9. Day 3
www.example.com
Database
Application
Cache
Application
Cache
Web server

10. Day 4. Morning
DB Server Crash

11. Day 4. Night
www.example.com
DatabaseApplication
Cache
Application
Cache
Web server Database
Database
Database Cluster

12. Day 5
www.example.com
Database
Application
Cache
Application
Cache
Database
Database
Database Cluster
Web server
Cache
Web server
Cache
Web server
Cache

13. Day 6
Cache
Application
CRUD
Users
Authentication Notifications
API calls
to 3-rd
parties
Background
processing

14. A HA MOMENT

15. Day 7
www.example.com
Database
Database Cluster
Database Database
Users
Service
Authentication
and
Authorization
Service
Notification
Service
Crawler
Service
Parser
Service
Image
Resizer
Service
Report
Generation
Service
Application Cluster
Web server
Web server
Web server
Web Servers
Cluster
Cache
Cache
Cache Cluster

16. Core Idea
Process Component Microservice

17. Benefits
1. Individual scalability
2. Language/Framework independent
3. Small in general
(easier for a developer to understand)
4. Independent development and
deploy process per service

18. Dockerized
Infrastructure

19. Database
Database Cluster
Database Database
Users
Service
Authentication
and
Authorization
Service
Notification
Service
Crawler
Service
Parser
Service
Image
Resizer
Service
Report
Generation
Service
Application Cluster
Cache
Cache
Cache Cluster
MQ
MQ Cluster
MQ
ES
ElasticSearch Cluster
ES ESNginx
Web Servers Cluster
Nginx Nginx
Services - are all about Containers

20. Software Delivery (before)

21. Software Delivery (before)

22. The Game Changer

23. Software Delivery (now)

24. Software Delivery (now)

25. Software Delivery (now)

26. Dockerfile
(DSL)
Docker
Image
Docker
Container
App
App 2
App 3
1
2
3
Uniform Processing

27. Problems?

29. Where is my services?
Service Discovery

30. Tomcat
10.0.1.17:8080
RabbitMQ
10.0.1.171:5672
MongoDB
10.0.1.253:27017
API
10.0.1.11:80
Service Locator
10.0.1.17:8080 tomcat
10.0.1.171:5672 rabbitmq
10.0.1.253:27017 mongodb
10.0.1.11:3306 api

31. Looks familiar?
Own DNS?

32. Solution
Consul by HashiCorp
(consul.io)

33. Service Discovery
Service 4
Service 2
Service 3
Service 1
Service 1
Service 2
Service 3
Service 2

34. Service Discovery
Service 2
Service 2
Service 2
service2.service.consul

35. Service Discovery
DNS Masq Consul
External DNS
*.service.consul

36. Service Discovery

37. Cluster Management

38. Server 1
4 CPU & 16GB RAM
Server 2
8 CPU & 32GB RAM
Server 3
1 CPU & 8GB RAM
Server 4
2 CPU & 2GB RAM
Notification Service
API Service
Image Resizer
4xCPU
Reporting Service
2xRAM
Logger Service
User Service
Resources
(servers)
Services
(images)
Containers
(running)
2x
3x
10x
4x
1x
1x

39. Cluster Management
• ECS & ECR (Amazon)
• Kubernetes (Google)
• Nomad (HashiCorp)
• Mesos & Marathon (Apache)

40. Ansible

41. hosts: webservers
sudo: True
tasks:
- name: install nginx
apt: name=nginx update_cache=yes
- name: copy nginx config file
copy: src=files/nginx.conf dest=/etc/nginx/sites-available/default
- name: enable configuration
file: >
dest=/etc/nginx/sites-enabled/default
src=/etc/nginx/sites-available/default
state=link
- name: copy index.html
template: >
src=templates/index.html.j2
dest=/usr/share/nginx/html/index.html
mode=0644
- name: restart nginx
service: name=nginx state=restarted
Ansible Playbooks

42. Symfony Apps
with Docker

43. Symfony Apps with Docker
Application Code
Webserver
Database
Cache
PHP-FPM Supervisord
• PHP-FPM
• Webserver
• Database
• Cache

44. Pitfalls with Docker

45. Questions?
Oleksii Petrov
Skelia Ukraine / ETwater Systems
skype: alexhelkar
twitter: @alexhelkar
email: alexhelkar@gmail.com
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