gistfile1.txt

require 'rest-client'
require 'json'
require 'openssl'

uri = 'https://admin:changeme@katello-dev.bitbin.de/api/v2/hosts'

hostinfo = {}
hostinfo[:environment] = 'Standard_Base'
hostinfo[:hostgroup_id] = 2
hostinfo[:name] = 'testtest2'

body = {hosts: [hostinfo] }
headers = {"Content-Type" => 'application/json', "Accept" => 'application/json;version=2'}

request = RestClient::Request.new(
  method: :post,
  url: uri,
  headers: headers,
  payload: body.to_json
)

begin
  request.execute
rescue => e
  puts e.inspect
end