gistfile1.txt

def prometheus_nodes_by_role(role = '*', port = 9100)
  servers = []
  search(:node, "role:#{role}").each do |server|
    servers << "'#{to_ipv6(server.ipv6_ips.first)}:#{port}'" if server.ipv6_ips.any?
    servers << "'#{server.ipv4_ips.private.first}:#{port}'" unless server.ipv6_ips.any?
  end
  servers
end