DevOps: Puppet & Chef

Overview on DevOps, Puppet & Chef, as well as a comparison between the two.

Transcript

1. DevOps, Puppet & Chef (from susestudio.com's perspective)
2. I'm James Tan @jamestyj on Twitter & Github blog.susestudio.com Engineering Manager @
3. Where I'm from... Singapore! (but living in Germany)
7. What I work on...
10. Appliance / Image
11. SUSE Cloud
22. DevOps
23. I want change! I want stability! Wall of Confusion Development Operations
24. Wall of Confusion Development Operations
25. Wall of Confusion Development Operations
26. Communication Collaboration Integration Automation
27. We have change without pain We're in it together! Development Operations
28. Continuous deployments Continuous (automated) builds, integration, tests, and deployments
29. 0 10 20 30 40 50 60 susestudio.com deployments (per month) Jun 2009 to Sep 2012 Deployments Continuous deployments!
30. Configuration Management is not easy
33. What happens when the server crashes? How do you scale this to other servers? How do you deploy to other data centers or to the cloud?
34. Infrastructure as Code Repeatable Scalable Maintainable
35. Infrastructure as Code Version control Peer code reviews Tests
36. vs
37. Flavors Serverless Puppet Master/Agent Puppet Puppet Enterprise Chef Solo Chef Client & Server Private Chef Hosted Chef
38. Installing on openSUSE 12.2 # Installing Puppet > zypper ar http://download.opensuse.org/repositories\ /systemsmanagement:/puppet/openSUSE_12.2/ Puppet > zypper in puppet # Installing Chef > zypper ar http://download.opensuse.org/repositories\ /systemsmanagement:/chef/openSUSE_12.2/ Chef > zypper in rubygem-chef
39. Puppet quickstart (serverless) > vim test.pp file { 'testfile-puppet': path => '/tmp/testfile-puppet', ensure => present, mode => '0640', content => "I'm a test file.\n" } > puppet apply test.pp
40. Chef quickstart (solo) > knife cookbook create test > vim /var/chef/cookbooks/test/recipes/default.rb file "/tmp/testfile-chef" do mode "0640" content "I'm a test file.\n" action :create end > chef-solo -o test -N test
41. Puppet package, file, service package { 'openssh-server': ensure => present, before => File['/etc/ssh/sshd_config'] } file { '/etc/ssh/sshd_config': ensure => file, mode => '0600', source => 'sshd_config' } service { 'sshd': ensure => running, enable => true, hasrestart => true, hasstatus => true, subscribe => File['/etc/ssh/sshd_config'] } Ensure order!
42. Chef package, file, service package "openssh-server" do action :install end cookbook_file "/etc/ssh/sshd_config" do source "sshd_config" mode "0600" end service "sshd" do supports :status => true, :restart => true action [ :enable, :start ] subscribes :reload, resources( "cookbook_file[/etc/ssh/sshd_config]") end
43. Puppet vs Chef package, file, service package { 'openssh-server': ensure => present, before => File['/etc/ssh/sshd_config'] } file { '/etc/ssh/sshd_config': ensure => file, mode => '0600', source => 'sshd_config' } service { 'sshd': ensure => running, enable => true, hasrestart => true, hasstatus => true, subscribe => File['/etc/ssh/sshd_config'] } package "openssh-server" do action :install end cookbook_file "/etc/ssh/sshd_config" do source "sshd_config" mode "0600" end service "sshd" do supports :status => true, :restart => true action [ :enable, :start ] subscribes :reload, resources( "cookbook_file[/etc/ssh/sshd_config]") end
44. Resources Puppet & Chef: cron, exec/execute, file, group, mount, package, service, user Puppet: augeas, host, interface, nagios_command, ssh_authorized_key, sshkey, zfs, zone, … Chef: deploy, directory, env, git, HTTP request, Link, log, route, Ruby block, subversion, ...
45. Puppet & Chef templates (ERB) # Puppet manifest: balancer.pp $nodes = [ "node100", "node101", "node102" ] file { '/etc/apache/balancer.conf': path => '/etc/apache/balancer.conf', ensure => file, content => template("balancer.erb") } # Chef recipe: balancer.rb template "/etc/apache/balancer.conf" do source "balancer.erb" variables({ :nodes => ["node100", "node101", "node102"] }) end
46. Puppet & Chef templates (ERB) # Template: balancer.erb <Proxy balancer://mycluster> <% nodes.each do |node| -%> BalancerMember http://<%= node %>.cluster.xs:81 <% end -%> </Proxy> # Output: /etc/apache/balancer.conf <Proxy balancer://mycluster> BalancerMember http://node100.cluster.xs:81 BalancerMember http://node101.cluster.xs:81 BalancerMember http://node102.cluster.xs:81 </Proxy>
47. Code reuse Puppet modules Manifests Files Libraries Templates (ERB) Chef cookbooks Recipes File Distribution Libraries Templates (ERB) Attributes Definitions Lightweight Resources & Providers (LWRP) Metadata
48. Puppet Master / Agent Puppet Master Workstation Nodes Git Git MCollective PuppetDB Puppet Dashboard Puppet Agent Facter
50. Chef Server / Client Chef API server Workstation Nodes Git knife Chef Indexer (Solr) Chef Web UI Chef Client Ohai CouchDB RabbitMQ knife (ssh)
53. Other concepts Puppet Classes External Node Classifier (ENC) Chef Roles Run lists (Encrypted) Databags Search
54. We're moving from Puppet to Chef Why?
55. More maintainers needed!
56. Questions? Slides @ http://speakerdeck.com/u/jamestyj