Brand new install can't find eyaml command

[iainhallam]

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: 5.5.1
• Puppet server version: 5.3.1
• Ruby: ? 2.4.0
• Distribution: CentOS 7.4
• Module version: 3.3.2

How to reproduce (e.g Puppet code you use)

(Having already installed Puppet and Foreman using theforeman-puppet and theforeman-foreman/theforeman-foreman_proxy.)

puppet module install --version 1.6.0 puppetlabs-inifile
puppet module install --version 3.3.2 puppet-hiera
puppet module install --version 1.0.0 puppetlabs-puppetserver_gem
puppet apply hiera.pp

class { '::hiera':
  # EYAML
  create_keys     => true,
  eyaml           => true,

  # Global hierarchy
  hiera_version   => '5',
  hiera5_defaults => {
    'datadir'   => 'data',
    'data_hash' => 'yaml_data',
  },
  hierarchy       => [
    {
      'name' => 'Global default YAML',
      'path' => 'default.yaml',
    },
  ],
  merge_behavior  => 'deeper',
  provider        => 'puppetserver_gem',
}

What are you seeing

Puppet fails to create the keys because it can't find the eyaml command. Is this due to using puppet apply?

What behaviour did you expect instead

Puppet would be able to use eyaml without extra steps, or anything extra would be documented in the README.

Output log

Notice: Compiled catalog for puppet-server.private in environment production in 0.19 seconds
Notice: /Stage[main]/Hiera::Eyaml/File[/etc/puppetlabs/puppet/keys]/ensure: created
Notice: /Stage[main]/Hiera::Deep_merge/Hiera::Install[deep_merge]/Package[puppetserver deep_merge]/ensure: created
Notice: /Stage[main]/Hiera::Eyaml/File[/etc/puppetlabs/puppet/keys/private_key.pkcs7.pem]: Dependency Exec[createkeys] has failures: true
Notice: /Stage[main]/Hiera::Eyaml/File[/etc/puppetlabs/puppet/keys/public_key.pkcs7.pem]: Dependency Exec[createkeys] has failures: true
Notice: /Stage[main]/Hiera/File[/etc/puppetlabs/puppet/hiera.yaml]: Dependency Exec[createkeys] has failures: true
Notice: /Stage[main]/Hiera/File[/etc/hiera.yaml]: Dependency Exec[createkeys] has failures: true
Notice: /Stage[main]/Hiera/Ini_setting[puppet.conf hiera_config main section]: Dependency Exec[createkeys] has failures: true
Error: Could not find command 'eyaml'
Error: /Stage[main]/Hiera::Eyaml/Exec[createkeys]/returns: change from 'notrun' to ['0'] failed: Could not find command 'eyaml'
Warning: /Stage[main]/Hiera::Eyaml/File[/etc/puppetlabs/puppet/keys/private_key.pkcs7.pem]: Skipping because of failed dependencies
Warning: /Stage[main]/Hiera::Eyaml/File[/etc/puppetlabs/puppet/keys/public_key.pkcs7.pem]: Skipping because of failed dependencies
Warning: /Stage[main]/Hiera/File[/etc/puppetlabs/puppet/hiera.yaml]: Skipping because of failed dependencies
Warning: /Stage[main]/Hiera/File[/etc/hiera.yaml]: Skipping because of failed dependencies
Warning: /Stage[main]/Hiera/Ini_setting[puppet.conf hiera_config main section]: Skipping because of failed dependencies
Notice: Applied catalog in 83.40 seconds

Any additional information you'd like to impart