Evaluation of open source configuration management tool - puppet. What can bring to development team and the entire organization. How it works internaly, possible modes it can operate etc.

1. Configuration management
What puppet can bring us
Presentation prepared by Jakub Stransky

2. BigData – near future – technology list
• Hadoop cluster
• Hbase installed on top of Hadoop cluster
• Monitoring capability – Zabbix
• Log management – ? Syslog server ?
• Stand alone components
• Web-container – Apache Tomcat
• Messaging server - ? ActiveMQ, RabbitMQ,
Kafka… ?
• …

3. Common infrastructure tasks
• Install the technologies
• Keep the environments consistent
• Scale out the clusters
• Maintain the servers
• Business solution components upgrades
• Surveillance of the infrastructure configuration
• …

4. Solution with puppet
• What puppet is?
– Automation configuration management tool used by
DevOps
– Describe the desired state of the machine instead of how
to achieve it
– All is resource
– Motto: “Code your infrastructure”
– Elementary building block = Manifest
– Offers predefined resource types – User, File, …
– Allows to create custom types
– Huge open source community – you don’t need to code
everything

5. Puppet pros and cons
• Benefits
– It is a code!
• Abstracts you from the details of underlying infrastructure (configuration manager)
• Your infrastructure has history ! – you have your code versioned – don’t you?
• Your infrastructure is consistent – you execute the same code on every single machine,
every single environment
• You can code everything and you need to understand what your infrastructure is pretty
well
• It is readable
– You can check the state of the machine if is in comply with desired state
– …
• Disadvantages
– It is a code!
• You need to test, release ,…
• You need to think when you write the code – which kind of flexibility your code should
offer – if you don’t code it you cannot configure it
• ..

6. What we could get - vision

7. How puppet works:
master-client architecture

8. How puppet works - internals

9. What is puppet capable to do -
Resource Types
• augeas
• computer
• cron
• exec
• file
• filebucket
• group
• host
• interface
• k5login
• macauthorization
• mailalias
• maillist
• mcx
• mount
• nagios_command
• nagios_contact
• nagios_contactgroup
• nagios_host
• nagios_hostdependency
• nagios_hostescalation
• nagios_hostextinfo
• nagios_hostgroup
• nagios_service
• nagios_servicedependency
• nagios_serviceescalation
• nagios_serviceextinfo
• nagios_servicegroup
• nagios_timeperiod
• notify
• package
• resources
• router
• schedule
• selboolean
• selmodule
• service
• ssh_authorized_key
• sshkey
• stage
• tidy
• user
• vlan
• yumrepo
• zfs
• zone
• zpool

10. Demo
Puppet Enterprise Console
Our Prague testing cluster

11. Resources
• Official puppet web: http://puppetlabs.com/
• OpenSource puppet modules:
http://forge.puppetlabs.com/
• Discussion forum:
https://ask.puppetlabs.com/questions/
• Puppet type reference:
http://docs.puppetlabs.com/references/2.7.0/ty
pe.html
• Puppet reference manual:
http://docs.puppetlabs.com/puppet/2.7/referen
ce/index.html

12. Q & A

13. Puppet Part II

14. Don’t need to code everything –
Puppet Forge

15. IDE - geppeto

17. Puppet – design patterns
Package – Service - Config

18. Role – Profile - Module