I've done UML. I've found that redhat 8.0 is the most stable platform underneath the uml. I've tried Mandrake and Debian. Debian was very unstable on an athlon. I use tun/tap to generate the ip address sockets to create your ip addresses. This gives every machine its own address without tying up addresses on the host machine. I run some mandrakes as uml's, so I create a Mandrake user. The Mandrake user runs the uml under 'his' permissions, so the startup file must create the taps with his permissions. -------------------------------------- here is part of my /etc/rc.d/rc.local # # set up bridging on ethernet 0 /etc/rc.d/setup_br0 # bridging on ethernet 1 /etc/rc.d/setup_br1 ------------------------------------- the setup_br0 file --------------------------- #setup_br0 # modify eth0, turning it into br0 modprobe bridge modprobe tun /usr/sbin/brctl addbr br0 /usr/sbin/brctl stp br0 off /bin/su - mandrake -c "/usr/bin/tunctl -u mandrake -t tap0" /bin/su - mandrake -c "/usr/bin/tunctl -u mandrake -t tap2" /bin/su - mandrake -c "/usr/bin/tunctl -u mandrake -t tap4" /bin/su - mandrake -c "/usr/bin/tunctl -u mandrake -t tap6" /sbin/ifconfig tap0 0.0.0.0 promisc up /sbin/ifconfig tap2 0.0.0.0 promisc up /sbin/ifconfig tap4 0.0.0.0 promisc up /sbin/ifconfig tap6 0.0.0.0 promisc up /usr/sbin/brctl addif br0 eth0 /usr/sbin/brctl addif br0 tap0 /usr/sbin/brctl addif br0 tap2 /usr/sbin/brctl addif br0 tap4 /usr/sbin/brctl addif br0 tap6 /sbin/ifconfig br0 11.22.33.7 netmask 255.255.255.0 up /sbin/route add default gw 11.22.33.1 /sbin/route add -host 11.22.33.7 br0 ---------------------------------------------------- the startup file -------------------------------------------------- #!/bin/bash #uml startvm # cd /home/vmdirectory echo the uml_console umid is "vm" # # the virtual machine uses file root_fs by default # that root_fs file is in /home/vmdirectory # and must be owned by the user starting the vm # or must be in the same group as that user and that # user has write priv to it. # # swapfile allows you to mount a swap as its own hard # drive # # the following line has wrapped # linux umid=vm mem=64M eth0=tuntap,tap2 con0=fd:0,fd:1 con=/dev/null ubd1=swapfile -------------------------------------------------------------- In the virtual machine, I found the following to be useful when running multiple virtual machine. The last two #'s are related to the ip addresses I'm running with: in /etc/rc.d/rc.local ifconfig eth0 hw ether FE:FD:00:00:33:7 --> This gives you a good unique etherent address (which matches the network address to some extent) and allows multiple machines to exist on the same network with some semblance of sanity as you bring machines up and down. -------------------------------------------------------- NOTE: Different kernels behave differently as UML kernels. Some work better than others. Be aware that a UML kernel may not boot. I've heard of problems with version 2.4.23. These may be stupid user tricks, maybe not. -------------------------------------------------------------- I run the uml machines in console windows under X. I do a start menu, run, /home/vimdirectory/startvm (and check "run in a console"). This gives me an interactive boot window that I can take up and down indefinitely. I've tried the demon that can provide tun/tap's, but I've had issues with it being unstable. That may be my fault. Also, bringing a machine up and down by forcing it down and then back up may hose the bridge interface and require a master machine reboot to bring that tun/tab (tap2 in this case) back to life. This happens once in a great while to me. On Mon, 19 Jan 2004, David Rees wrote: > Date: Mon, 19 Jan 2004 11:36:03 -0800 (PST) > From: David Rees <drees@xxxxxxxxxxxxxxxx> > Reply-To: fedora-legacy-list@xxxxxxxxxx > To: fedora-legacy-list@xxxxxxxxxx > Subject: RE: mc packages need QA > > On Sun, January 18, 2004 at 7:19 pm, Arvand Sabetian wrote: > > > > I noticed that a lot of packages are being put out however some are not > > being tested (QAed?). This is probably the reason they are not being > > published even a week after they are created. My question is that do you > > think it is possible to run VMware (http://www.vmware.com/) and install RH > > 7.3/8.0/9.0 then test the packages using this? Or would the testing not be > > accurate as it is being done in VMWare? > > Another option besides VMware is UML (User Mode Linux, > http://user-mode-linux.sourceforge.net/). I've been trying to get this > setup so I can start getting familiar with the QA process. > > -Dave > >
