Sysadmin Training in the Virtual Unix Lab Hubert Feyrer <[email protected]> Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.1/15 Background Context: system admin training Problem: root access for users No Root - no practicing of many things Root - unknown state after exercise ) Reinstall to be safe Reinstall not always an easy option! Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.2/15 The Virtual Unix Lab Installs lab machines on demand Users can book exercises for a certain time All machines will be setup identically Exclusive access during exercises Evaluation of exercise results Feedback on success of exercise Machines are re-installed from scratch for next user Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.3/15 VUlab: User Area A user’s perspective: Login and account creation List of exercises Booking an exercise Taking an exercise Retrieving feedback afterwards Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.4/15 VUlab: Admin Area An admin’s perspective: Manage users Manage booked exercises See group statistics Create new exercises Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.5/15 Slideshow Time! Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.6/15 Server Machine Sun SPARCstation 5, 85MHz 192 MB RAM 3* external SCSI disk additional SBus ethernet card Runs NetBSD 1.6.2/sparc Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.7/15 Lab Machines 2* Sun SPARCstation 4, 110MHz 64 MB RAM 1 GB internal SCSI disk Run NetBSD 1.6.2/sparc or Solaris 9/sparc Goal: Virtual Machines! Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.8/15 Lab Machine Installation Server acts as DHCP, RARP and NFS server to lab network Netbooting of lab machines, after end of previous exercise (independent of running OS!) Image-deployment to lab machines via NFS (w/ some experiences from the g4u project :-) Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.9/15 Restricting Access to Lab Machines telnet ssh ftp 23 telnet 22 ssh 21 ftp telnet ssh ftp Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.10/15 Restricting Access to Lab Machines 23 telnet 22 ssh 21 ftp 23 telnet 22 ssh 21 ftp 23 telnet 22 ssh 21 ftp Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.10/15 Restricting Access to Lab Machines telnet ssh ftp 20023 20022 20021 10023 10022 10021 23 telnet 22 ssh 21 ftp telnet ssh ftp Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.10/15 Restricting Access to Lab Machines telnet ssh ftp 20023 20022 20021 10023 10022 10021 23 telnet 22 ssh 21 ftp telnet ssh ftp Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.10/15 Software Apache Postgres IPfilter NetBSD Solaris PHP Perl Bourne shell Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.11/15 Current Status The system works Available Exercises: Network Information System (NIS) Network File System (NFS) Tested successfully in summer semester 2004 w/ 40 students during course “System Administration” Server-upgrade pending Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.12/15 Future Perspectives Funding Define more exercises: Web- and Mail server DNS DHCP LDAP Samba Funding! Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.13/15 Future Perspectives Add more options for lab machines: Real hardware Emulated (virtual) hardware More operating systems: Linux, Windows Funding!!! Internationalisation Implement a tutoring system Think about user modeling Funding! Very very badly wanted! Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.14/15 Thank you! http://www.feyrer.de/vulab/ [email protected] Funding offers welcome! Hubert Feyrer <[email protected]> Sysadmin Training in the Virtual Unix Lab – p.15/15.