haproxy config

haproxy.pp

# collect all the servers with *role* `node`.
$nodes = servers_with_role('node')

# render a template in wich we use these servers.
$configfile = template('path-to-template/configfile.erb')

package {"haproxy":
    ensure => installed,
}

file {"/etc/haproxy/haproxy.cfg":
    content => $configfile
    notify => Service['haproxy'],
    require => Package['haproxy'],
}

service {"haproxy":
    ensure => running,
}