HDE, Inc. SEG dept.Yuu Yamanaka

Chef Puppet

An engineer of SEG dept. DevOps unit

(6 years career in HDE)

Yuu Yamanaka

Chef PuppetBefore explaining that,

Puppet

We have started to use Puppet from 2012/04

At the time, Chef was not popular and proven than Puppet

We were not Rubyist but Pythonista

(Of course, both Puppet and Chef are made by Ruby)

Can not apply a part of manifests to a node

Have to write all dependencies for each resources

Own and wordy syntax

Puppet

But some points stressed us…

knife-solo make it possible to test recipes speedy and easily

You also can assemble recipes by Role(cook –o role[base])

$ knife solo cook -o recipe[hdeone] srv1.example.com

Puppetpackage { 'ganglia-gmond':

ensure => latest,}

service { 'gmond':ensure => running,enable => true,hasstatus => true,hasrestart => true,require => Package['ganglia-gmond'],

}file { '/etc/ganglia/gmond.conf':

ensure => file,content => template(“path/to/gmond.conf.erb”),require => Package['ganglia-gmond'],notify => Service['gmond'],

}

Chef

package 'ganglia-gmond'

template '/etc/ganglia/gmond.conf' donotifies :restart, 'service[gmond]'

end

service 'gmond' dosupports :status => true, :restart => true, :reload => trueaction [:start, :enable]

end

Just recognized by order

and we often forget to specify…

ephemerals = node['ec2'].select { |k, _|k.start_with?('block_device_mapping_ephemeral')

} .map { |k, v| [k.split('_').last, "/dev/#{v}"] }

ephemerals.each { |name, device_path|execute 'mkfs' do

command "mkfs -t #{node['ec2']['ephemeral']['fstype']} #{device_path}"

not_if "grep -qs #{device_path} /proc/mounts"end

mount_point = "/media/#{name}"directory mount_point # create mount point

mount mount_point dodevice device_pathfstype node['ec2']['ephemeral']['fstype']action [:mount, :enable]

end}

%w(main.cf master.cf).each do |conf|template "/etc/postfix/#{conf}" do

notifies :restart, 'service[postfix]'end

end

We are learning Ruby syntax when writing recipes

It is a simple reason.

We would like to use a better tool.

Chef Puppet

Stay CreativeLive Comfortably

(from DevOps Unit's creed)

END