Ansible + Drupal: A Fortuitous DevOps Match
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This document discusses using Ansible to automate the deployment of Drupal 8 on a cluster of Raspberry Pis, called the #Dramble. It begins with an introduction to Ansible and how it can be used to solve problems with growing infrastructure and complex Drupal deployments. It then demonstrates how to define servers in Ansible inventory, run ad-hoc commands, and build playbooks to provision servers and deploy Drupal 8. Benchmarks show the #Dramble can handle over 2,000 requests per second when caching is enabled, but only 14 requests per second without caching. More opportunities for improving Drupal 8 performance on the #Dramble are discussed.
![Inventory
Like a hosts file for Ansible (/etc/ansible/hosts)
INI syntax
[webservers]
www1.pidramble.com
www2.pidramble.com
www3.pidramble.com](https://image.slidesharecdn.com/ansible-drupal-devops-midcamp-2015-150321103137-conversion-gate01/85/Ansible-Drupal-A-Fortuitous-DevOps-Match-13-320.jpg)
![Inventory
Like a hosts file for Ansible (/etc/ansible/hosts)
INI syntax
[webservers]
www1.pidramble.com
www2.pidramble.com
www3.pidramble.com
Group
Servers in group](https://image.slidesharecdn.com/ansible-drupal-devops-midcamp-2015-150321103137-conversion-gate01/85/Ansible-Drupal-A-Fortuitous-DevOps-Match-14-320.jpg)
Ansible + Drupal: A Fortuitous DevOps Match
- 1. Ansible + Drupal A fortuitous DevOps Match #MidCamp 2015 Jeff Geerling Technical Architect, Acquia ________________________________________ / "Automation shouldn't be your day job" #ansible #pycon2014 / ---------------------------------------- ^__^ (oo)_______ (__) )/ ||----w | || ||
- 2. Who am I? Jeff Geerling (geerlingguy) Technical Architect, Acquia Owner, Midwestern Mac LLC Dev (mainly)
- 3. Ansible for DevOps On LeanPub Nearly complete! 50% off: http://bit.ly/midcamp-a4d
- 4. Problems Growing infrastructure. Drupal deployments are complex. More deployments, more downtime. <insert your problem here>
- 5. “Configuration management for humans.” (— Me, 2014) Uses SSH Secure, fast, simple Don't need configuration management to manage your configuration management.
- 6. Over 270 modules built-in Over 3,000 roles on Ansible Galaxy Extensible, modular APIs (JSON, language-agnostic)
- 7. Installation Mac: brew install ansible Python pip: sudo pip install ansible RHEL/CentOS: sudo yum install ansible Deb/Ubuntu: sudo apt-add-repository ppa:ansible/ansible sudo apt-get update sudo apt-get install ansible
- 8. Ansible 101 1. Inventory: Describe your infrastructure 2. Ad-Hoc commands: Run one-off tasks 3. Playbooks: "Infrastructure as code"
- 9. ________________________________________ / Drupal 8 on a cluster of Raspberry Pis #dramble / ---------------------------------------- ^__^ (oo)_______ (__) )/ ||----w | || ||
- 10. http://robmyers.org/cc-ironies/no_flash_photography_sign/ Please help me avoid the Xenon Death Flash
- 11. The #Dramble CPU 24 cores / 5.4 GHz RAM 6 GB Storage 96 GB microSD Network 10/100 over Gigabit network
- 13. Inventory Like a hosts file for Ansible (/etc/ansible/hosts) INI syntax [webservers] www1.pidramble.com www2.pidramble.com www3.pidramble.com
- 14. Inventory Like a hosts file for Ansible (/etc/ansible/hosts) INI syntax [webservers] www1.pidramble.com www2.pidramble.com www3.pidramble.com Group Servers in group
- 15. Ad-Hoc commands Test Ansible's connection with the ping module. $ ansible webservers -m ping
- 16. Ad-Hoc commands Test Ansible's connection with the ping module. $ ansible webservers -m ping Group Module
- 19. Ad-Hoc commands Have fun with RGB LEDs! $ ansible webservers -a "rgb red" -s
- 20. Ad-Hoc commands Have fun with RGB LEDs! $ ansible webservers -a "rgb red" -s Group 'Use sudo' Command
- 21. ________ < Shiny! > -------- ^__^ (oo)_______ (__) )/ ||----w | || ||
- 22. Ad-Hoc commands $ ansible webservers -a "sudo apt-get install php5-common"
- 23. Ad-Hoc commands $ ansible webservers -m apt -a "name=php5-common state=installed" -s Module Arguments
- 24. Playbooks Ad-Hoc commands don't solve the snowflake problem "infrastructure as code" Simple YAML files Run with: ansible-playbook Unique, by Pen Waggener
- 25. Playbooks --- - hosts: webservers sudo: yes tasks: - name: Ensure PHP is installed. apt: name=php5-common state=installed
- 26. Playbooks --- - hosts: webservers sudo: yes tasks: - name: Ensure PHP is installed. apt: name=php5-common state=installed Group Module Documentation Arguments
- 27. Playbooks Includes: include playbooks in other playbooks Variables: flexible - defaults and easy overrides Templates: use Jinja2 (Twig-like syntax!) Roles: encapsulate 'chunks' of configuration (like PHP classes)
- 28. Back to the #Dramble “Drupal 8 on a cluster of Raspberry Pis”
- 29. Architecture
- 30. Architecture
- 31. Architecture
- 32. Architecture
- 33. Architecture --- - hosts: database sudo: yes vars_files: - ../vars.yml - vars.yml roles: - geerlingguy.firewall - geerlingguy.mysql - geerlingguy.munin-node - ../roles/leds Fully functioning MySQL server in 13 lines of YAML!
- 34. Provisioning the Servers No live demo: "Never rely on Conference WiFi" But we can talk about it later :-)
- 35. Deploying Drupal 8 Demo See: raspberry-pi-dramble on GitHub
- 36. Deploying Drupal 8 1. First deploy: install $ ansible-playbook main.yml 2. Second deploy: update, import config, rebuild caches $ ansible-playbook main.yml --extra-vars "drupal_version=1.1.1" 3. Third deploy: enable Redis $ ansible-playbook main.yml --extra-vars "drupal_version=1.1.1 drupal_redis_enabled=true"
- 38. $ wrk -t4 -c100 -d20 http://pidramble.com/ Running 20s test @ http://pidramble.com/ 4 threads and 100 connections Thread Stats Avg Stdev Max +/- Stdev Latency 45.19ms 21.19ms 350.10ms 89.04% Req/Sec 555.98 43.24 804.00 92.67% 44183 requests in 20.00s, 222.31MB read Requests/sec: 2209.20 Transfer/sec: 11.12MB $ wrk -t4 -c24 -d20 http://pidramble.com/?nocache=true Running 20s test @ http://pidramble.com/?nocache=true 4 threads and 24 connections Thread Stats Avg Stdev Max +/- Stdev Latency 1.62s 240.73ms 2.16s 63.33% Req/Sec 3.10 0.61 4.00 63.33% 288 requests in 20.03s, 1.45MB read Socket errors: connect 0, read 0, write 0, timeout 10 Requests/sec: 14.38 Transfer/sec: 73.89KB Cached req/s: 2209.20 Uncached req/s: 14.38
- 39. ____________________________________ / Drupal 8 is scalable, but not fast ...yet. / ------------------------------------ ^__^ (oo)_______ (__) )/ ||----w | || ||
- 40. MORE DRAMBLE! Tons of benchmarks D8 performance and deployment discovery See the Raspberry Pi Dramble Wiki
- 41. MORE ANSIBLE! Docker integration AWS, DigitalOcean, Rackspace, Softlayer, Linode, etc. Notifications Rolling updates Ansible Vault Dynamic inventory etc...
- 42. Resources • Ansible documentation • Ansible Vagrant examples • Ansible for DevOps • Raspberry Pi Dramble
- 43. Feedback • https://joind.in/13825 • Speaker name: @geerlingguy • #MidCamp • #Dramble 50% off Ansible or DevOps: http://bit.ly/midcamp-a4d