Like the parameter defaults we introduced in the previous chapter, Hiera may be used to provide default values to classes. This feature requires Puppet Version 3 and higher.
Install and configure hiera as we did in Chapter 2, Puppet Infrastructure. Create a global or common yaml file; this will serve as the default for all values.
Create a class with parameters and no default values:
t@mylaptop ~/puppet $ mkdir -p modules/mysql/manifests t@mylaptop ~/puppet $ vim modules/mysql/manifests/init.pp class mysql ( $port, $socket, $package ) { notify {"Port: $port Socket: $socket Package: $package": } }
Update your common
.yamlfile in Hiera with the default values for themysqlclass:--- mysql::port: 3306 mysql::package: 'mysql-server' mysql::socket: '/var/lib/mysql/mysql.sock'
Apply the class to a node, you can add the mysql class to your default node for now.
node default { class {'mysql': } }
Run
puppet agentand verify the output...