The NDB Cluster Auto-Installer (No longer supported) • Certificate-based authentication.   The back end  ndb_setup.py  process can execute commands on the local host as well as remote hosts. This means that anyone connecting to the back end can take charge of how commands are executed. To reject unwanted connections to the back end, a certificate may be required for authentication of the client. In this case, a certificate must be issued by the user, installed in the browser, and made available to the back end for authentication purposes. You can enact this requirement (together with or in place of password or key authentication) by starting  ndb_setup.py with the  --ca-certs-file  ( -a ) option.  There is no need or requirement for secure authentication when the client browser is running on the same host as the Auto-Installer back end. See also Section 23.5.17, “NDB Cluster Security Issues” , which discusses security considerations to take into account when deploying NDB Cluster, as well as Chapter 6,  Security , for more general MySQL security information. The NDB Cluster Auto-Installer interface is made up of several pages, each corresponding to a step in the process used to configure and deploy an NDB Cluster. These pages are listed here, in order: • Welcome : Begin using the Auto-Installer by choosing either to configure a new NDB Cluster, or to continue configuring an existing one. • Define Cluster : Set basic information about the cluster as a whole, such as name, hosts, and load type. Here you can also set the SSH authentication type for accessing remote hosts, if needed. • Define Hosts : Identify the hosts where you intend to run NDB Cluster processes. • Define Processes : Assign one or more processes of a given type or types to each cluster host. • Define Parameters : Set configuration attributes for processes or types of processes. • Deploy Configuration : Deploy the cluster with the configuration set previously; start and stop the deployed cluster. NDB Cluster Installer Settings and Help Menus These menus are shown on all screens except for the  Welcome  screen. They provide access to installer settings and information. The  Settings  menu is shown here in more detail: Figure 23.6 NDB Cluster Auto-Installer Settings menu 4008 23.2.8.2 Using the NDB Cluster Auto-Installer