April hosts dozens of services on less than ten hardware machines and less than fifty virtual machines. Their configuration is centralized in a puppet master repository. The order of magnitude is not expected to change in the next few years. The hierarchy is organized in manifests and modules. The manifests directory contains the inventory of all virtual machines and bare metal associated with the inclusion of classes and the instantiation of types.
node 'harmine.pavot.vm.april-int',
'backuppc.novalocal' inherits vserver-pavot {
include backuppc::server
include april_nagios::nrpe_server
include april_nagios::check_backuppc
}
The modules contain the configuration logic for a sub system such as backuppc, screen or ssh.
class screen {
package { 'screen': ensure => present, }
file { '/root/.screenrc':
ensure => present,
owner => 'root',
group => 'root',
mode => 0400,
replace => true,
source => 'puppet:///screen/.screenrc',
}
}
Continue reading “puppet master hierarchy organization and conventions”