Name: umvs
Description: umvs is a utility, written in C++ and the Bash scripting language, that is used to administrate user-mode Linux instances. The main goal of the application is to simplify the configuration and administration of UMLs. Furthemore umvs make use of a templating system, making it easy to have different UML configurations.

umvs will set up the network using the configured devices and, depending on the configuration, will use uml_switch and/or bridge-utils to configure the network.

Adding a UML
Adding a new UML is very simple, just execute 'umvs -a [ID]', and thats it. umvs genrates a MAC address from the UML id and makes use of dhcpd to assign the next available IP address to the newly added UML and automatically updates dhcpd.conf accordingly.(Optionally the UML can also be added by editing the umvs_conf.xml file).

Configuration files
umvs uses XML as the format for it's configuration files, simply because it is a well organized, standardized, simple to read format, supported by numerous Open Source libraries.

Tap devices
Depending on your configuration, umvs will automatically create the necessary tap device before the UML is started, and will also bring the tap device down when the UML is stopped or killed. If the UML is halted/killed by any other means then through umvs, the tap device will not be removed, but the next time umvs is run, all non used tap devices will be cleaned up/removed(belonging to configured UMLs). There is no reason for having empty tap devices lying around.

IP addresses
umvs parse the IP range specified in the dhcpd.conf file to determine the numbers of IP address that has been allocated for dynamic IP addresses. These addresses will be discarded, they will not be used to assign static IP addresses to the UML hosts, but if the range does not contain a high value(refer to the dhcpd.conf manual page) then this will be ignored and all the addresses will be used.

umvs will be released under the GPL license.

Please refer to the Configuration and Options sections for more detailed descriptions of umvs's features and capabilities.

User-mode Linux: User-mode Linux is a patch for the Linux kernel that gives it the ability to be compiled as an executable binary and run as a process on a Linux host machine, in other words, a virtual Linux instance inside of Linux. The user-mode Linux instance can also be assigned vitual resources, like hardware devices, etc. Through this patch one can for example create a complete virtual network on a single computer.

Release: The application is still in its' testing phase and will be released when I am finished sorting out the todos and last bugs.

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