I am creating a manifest to get an Agent's partition name.
The fact $partitions shows the detail of the partition info.
{"xvda1"=>{"uuid"=>"d1697425-49d0-4c9f-9901-5f9260be8196", "size"=>"83859300", "mount"=>"/", "label"=>"cloudimg-rootfs", "filesystem"=>"ext4"}}
But, I just want to get the name part (xvda1) and use it as a variable for a configuration file.
Is there any way to filter the output in Puppet?
The fastest way to solve this would be to use the keys function from puppetlabs/stdlib: https://forge.puppet.com/puppetlabs/stdlib/readme.
keys() Returns the keys of a hash as an array. Type: rvalue.
With that function, we can transform the output hash from Facter into an array of the keys and access its elements normally. Assuming that xvda1 is the 0th element,
Facter 2:
$variable = keys($::partitions)[0]
Facter 3:
$variable = keys($facts['partitions'])[0]