Is there any way to use arrays in a puppet module (not in template)?

Question

I want to use puppet to manage a hadoop cluster. On the machines we have several directories which must be created and set permissions.

But i'm unable to add array values for defined methods.

define hdfs_site( $dirs ) { file { $dirs: ensure => directory, owner => "hadoop", group => "hadoop", mode => 755; } file { "/opt/hadoop/conf/hdfs-site.xml": content => template("hdfs-site.xml.erb"), owner => "root", group => "root", mode => 644; } } define hadoop_slave( $mem, $cpu, $dirs ) { hadoop_base { mem => $mem, cpu => $cpu, } hdfs_site { dirs => $dirs, } } 

hadoop_base is similar to hdfs_site.

EDIT

The error message was:

Could not parse for environment production: All resource specifications require names; expected '%s' at /etc/puppet/modules/hadoop/manifests/init.pp:52

which is the $dirs line in hadoop_slave

Answer 1

As the message tells you, any resource specification requires a name.

In your specific case the following snippet should work:

define hadoop_slave( $mem, $cpu, $dirs ) { hadoop_base { "${name}_hadoop_base": mem => $mem, cpu => $cpu, } hdfs_site { "${name}_hdfs_site": dirs => $dirs, } }