The configuration file /etc/eucalyptus/eucalyptus.conf, used by all Eucalyptus services (-cloud, -cc, -nc, etc) is very confusing and practically undocumented. The inline comments are helpful, but they do not provide enough context for the administrator to decide which configuration directive are relevant to his specific setup.
For example, let's say a system administrator is configuring a machine running only the Walrus service, to be registered with a CLC running on another machine. Is it relevant for him to define VNET_PRIVINTERFACE directive and, if so, what value should he use? And so on for pretty much all directives.
At the very least, a eucalyptus.conf man page explaining in which context each directive are relevant would desirable. Better yet would be to break eucalyptus.conf in service-specific configuration file that could be documented separately, either inline or in a man page.