Parameter flannel::etcd_endpoints has faulty documentation

[ananace]

The documentation states;

# [*etcd_endpoints*]
#   a comma-delimited list of etcd endpoints.
#   Type: Array or String
#   Defaults to http://127.0.0.1:4001

In etcd_key.pp though, it's expected to always be an array;

  etcd_key { "${::flannel::etcd_prefix}/config":
    value     => template('flannel/etcd_network_definition.erb'),
    peers     => join($::flannel::etcd_endpoints, ','), # This line
    cert_file => $::flannel::etcd_certfile,

On Puppet 4 at least, this is a compile error in case you provide the etcd_endpoints as a comma-separated string;

Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Resource Statement, Evaluation Error: Error while evaluating a Function Call, join(): Requires array to work with at /etc/puppetlabs/code/environments/devel/modules/flannel/manifests/etcd_key.pp:45:18