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DevOps with Ansible
Federico Marani - DJUGL Sep ‘13
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- First website in Python on Linux in 1998
- Startupper
Federico Marani - @flagZ
Tech Lead at
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DevOps
- Infrastructure as code
- People leave companies
Automate all the things!
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DevOps should not
require programming
experience
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DevOps = SysAdmin 2.0
(ideally keep the one-liners in the transition)
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Ansible
- Quick to get started
- Builds on familiar tools
- Run commands on ssh
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Playbook
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Task order is important
Example:
1. Install Postgres
2. Create db user
3. Create database
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Task are idempotent*
*can be applied multiple times without changing
the result beyond the initial application
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Handlers
commands flagged for later execution
(when task caused state change)
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Inventory
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batteries included
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How do we use it
Postgresql
PostGIS
Solr Nginx
Munin Rsyslog
Postfix
Vagrant
Memcached
Rabbitmq
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TIPS
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- Use Ansible roles
- Use the action with least
side effects (e.g. prefer
“copy” to “template”)
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- Keep servers stateless
- Do things in the right place,
either project level or
infrastructure level.
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Thanks
Federico Marani
@flagZ
http://flagzeta.org
Pics by
- http://www.flickr.com/photos/zigazou76/
- http://www.flickr.com/photos/jamesclay/