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Modules

An IsiSetupModule is a collection of packages and configuration which are needed to provide a service. Technically, a module is a collection of changesets on the /etc configuration directory.

The packages themselves aren't part of the module, but belong to the Debian archive. The module itself only contains a list of the package names.

Modules are hierarchical, so that a e.g. a gateway module can be the collection of dhcp-server, ntp-server etc.

Another way to look at the module is to see it as a customization layer. There are several variables making up the customization:

• Security requirements (SSH, Account Priviledges...)
• Infrastructure to use (DNS, NTP, Backup, Admin access...)
• Client (Profiles, Login messages, Locales...)
• Network (Routes...)
• Host (Name, IP-Address...)
• Services (DNS-Server, Mail-Server, Web-Server...)