Extending Ansible - Ansible Benelux meetup - Amsterdam 11-02-2016
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This is a talk about ways Ansible could be extended through dynamic inventory, plugins, modules or API. There was a discussion during meetup and ideas generated are added to the presentation.
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Extending Ansible - Ansible Benelux meetup - Amsterdam 11-02-2016
- 1. Extending Ansible When you want some more of your favorite tool Ansible Benelux meetup, 11-02-2016 Amsterdam, Sentia Pavel Chunyayev
- 2. @PavelChunyayev Amsterdam Levi9 HQ Amsterdam – 2005 25 people Novi Sad Serbia Novi Sad – 2005 320+ people Zrenjanin Serbia Zrenjanin– 2014 30+ people Iasi Romania Iasi – 2007 80+ people Kiev Ukraine Kiev – 2008 130+ people
- 4. @PavelChunyayev Customer satisfaction 2015 • 4th year great results in Outsourcing Performance study • 2015: 100% customer recommendation score Excellent trust score
- 5. @PavelChunyayev About me • 12 years of IT experience • Lived and worked in Ukraine and Estonia • Moved a year and half ago to the Netherlands • Learning Dutch • Love cycling • De Hollandse 100 - https://www.dehollandse100.nl/actie/pavel-chunyayev • Alpe d’HuZes - http://deelnemers.opgevenisgeenoptie.nl/levi9
- 6. Continuous Delivery * I had to talk about Continuous Delivery shortly. I’m Continuous Delivery Architect after all.
- 7. Safely, rapidly and predictably deliver new features to production
- 8. @PavelChunyayev Continuous Delivery • Faster time to market • How many deployments a day? • Time between committing line of code and running in production
- 9. It’s not only about speed
- 10. @PavelChunyayev It’s not only about speed • Right process to support continuous feature delivery, improvements and learning. • Proper testing to be able to deliver at high speed.
- 11. Quality > Speed
- 12. Continuous Delivery Build • Test • Deploy Ansible is perfect for Continuous Delivery Especially with immutable infrastructure
- 14. Ansible is powerful out of the box Extremely easy to extend
- 15. @PavelChunyayev Plenty of information on the internet • Most covers Ansible pre 2.0, but perfect to start with • http://slides.com/alejandroguiraorodriguez/ee-ansible-with-python • http://tylerturk.com/extending-ansible/ • http://www.slideshare.net/YanKurniawan1/extending-ansible • http://www.llabs.io/ansible-action-plugins • http://docs.ansible.com/ansible/developing.html
- 16. @PavelChunyayev Extending Ansible • Dynamic inventory • Plugins • Modules • Python API
- 18. @PavelChunyayev Dynamic inventory • http://docs.ansible.com/ansible/developing_inventory.html • http://docs.ansible.com/ansible/intro_dynamic_inventory.html • Just a script that returns JSON dictionary of all the groups • Numerous dynamic inventory scripts: https://github.com/ansible/ansible/tree/devel/contrib/inventory • AWS, Azure, GCE, Digital Ocean, Docker, Openstack, Jails, Zabbix • VMware, Virtualbox, Nagios, oVirt, Consul, etc.
- 19. @PavelChunyayev More dynamic inventories? • Combining several service providers • SNMP • LDAP • Sentia :)
- 20. @PavelChunyayev Ideas for dynamic inventories generated during meetup • SIDN • CMDB • nmap • DNS (scan to identify inventory) • Network inventory • Ssh host config (from files) • Bonjour / ZeroConf • DHCP server • Racktables (or similar services)
- 21. Plugins
- 22. @PavelChunyayev Plugins • http://docs.ansible.com/ansible/developing_plugins.html • https://github.com/ansible/ansible/tree/devel/lib/ansible/plugins • callback • connection • filter • lookup • strategy
- 23. @PavelChunyayev Callback plugins • React on certain events during Ansible execution • Some existing: • OS X say • HipChat • Mail • Syslog JSON • Timer • More? • Send logs to ELK • Send metrics to Grafana • Leave audit trails • Slack • IRC
- 24. @PavelChunyayev Ideas for callback plugins generated during meetup • Tags (assign tags based on execution) • Backup (additional step before changing something) • Change output • Nagios (or general notification to monitoring systems)
- 25. @PavelChunyayev Connection plugins • More ways to connect to remote systems • Some existing: • Docker • chroot • WinRM • Jail • LXC • More? • Someone using anything besides SSH? :) • SNMP • SSH gateway • Multifactor authentication
- 26. @PavelChunyayev Filter plugins • Jinja2 filters to use • Some existing: • Various sets manipulations (math) • IP addresses manipulations • String manipulations • to / from JSON • More? • Test is the string is a valid running AWS EC2 instance • Convert AWS instance id into instance name (IP, DNS name, etc)
- 27. @PavelChunyayev Ideas for connection plugins generated during meetup • telnet • RADIUS • WebDAV / HTTP • mosh • Serial • IPMI
- 28. @PavelChunyayev Lookup plugins • Constructs like with_items: • Some interesting existing • consul • dict • dig • etcd • redis • etc. • More? • RDBMS • LDAP • DNS (IN SRV)
- 29. @PavelChunyayev Ideas for lookup plugins generated during meetup • Mongo • Monitoring (e.g. top 10 hosts with problems) • ElasticSearch • Netstat (services or routing tables) • Multicast • IPtables / other firewalls • Vnstat • /etc/password (not a generic file lookup)
- 30. @PavelChunyayev Strategy plugins • How to execute tasks in playbook • Existing: • Linear • Free • More? • Random • Some tasks free, some linear
- 31. @PavelChunyayev Ideas for strategy plugins generated during meetup • One host, one task at a time • Scoring (calculate the sequence based on the score)
- 32. Modules
- 33. @PavelChunyayev Modules • http://docs.ansible.com/ansible/developing_modules.html • Reusable units of magic that can be used by the Ansible API, or by the ansible or ansible-playbook programs. • Reading official modules is a good way to start • Test your module with hacking/test-module script • Create pull request to modules-extra
- 34. @PavelChunyayev Modules? • Deploying your applications • Configuring running applications • Maven (manage artifacts) • Usage of less popular applications • LDAP manipulation / credentials checking • All those AWS services that are not yet covered by modules • Custom backup • Pipelines as code
- 35. Ansible API
- 36. @PavelChunyayev Execute Ansible programmatically • Trigger Ansible run or Ansible-playbook from your application! • React to some events with running Ansible playbook • Get facts about infrastructure directly from an application • Your own Infrastructure as a Service
- 37. @PavelChunyayev Extending Ansible • Dynamic inventory • Plugins • Modules • Python API
- 38. @PavelChunyayev Takeaways • Ansible is a perfect tool • Easily extendable when needed • Don’t be afraid to extend Ansible • Don’t forget to return code to community • Participate in Ansible Coder’s Dojo pavel@levi9.com Any questions?