Cluster Administration Tool
Semester Thesis Summer 1998
Supervisors: F. Rauch, Prof. T. Stricker
Institute for Computer Systems, ETH Zürich
There are usually many users on our Cluster of PCs (CoPs). If
one would like to know which machines are currently in use, a
combination of some shell-commands like finger,
rsh/ssh, rusers need to be
started. Sometimes machines are dying or down, so more commands like
ping come into play. As there are different operating systems
on the cluster, it gets even more difficult to find out what's exactly
The goal of this thesis was to ease this task with a tool, so that one
always has an overview over the cluster and can administrate
the machines more easily.
The final Cluster Administration Tool supports Linux and
Windows NT and consists mainly of two parts:
The server daemons gather information on the machine on which they are
running, such as: Reachability, operating system currently running,
users loged in and their idle-times, load. To do so they use the
scripting capabilities of Tcl/Tk on Linux as well as a few very small
C-programs which handle requests to the OS which could not easily be
done in the scripting language. The daemons can easily be ported to
other UNIX operating systems. On Windows NT the daemons are
completely written in C as this fits better into the system.
- A client written in Tcl/Tk.
- A server daemon written mostly in Tcl/Tk (Linux version) and C
(Windows NT version) respectively.
The client is a frontend running on Linux. It connects to the server
daemons with TCP and communicates with them using a simple text-based
protocol. The returned results are then grafically displayed.
Additional functionalities include the possibility to reboot a remote
machine to a specified operating system, to copy files to a number of
selected machines, to watch remote log-files and to simply log into a
machine by clicking on its name.
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ETH Zürich: Department of Computer Science
Comments to Felix Rauch <firstname.lastname@example.org>
26. July 1999