On Monday 30 April 2007 13:04, Maxime Kinet wrote: > Hi, > > I'm trying to set up my first cluster with diskless nodes. To achieve > that, I'm using PXElinux on a server, running Fedora Core 6, and a > NFS-mounted root partition on the node. > Everything works perfectly > (getting the IP address, loading the kernel and mounting the > filesytem) until the node has to run some binaries located into /sbin > during the boot process. Apparently it's unable to execute them > because they have been compiled with dynamically linked libraries and > not statically. The /sbin directory of the node is a simple copy of > the one of the server. I suppose, that you have done something like, creating a /diskless directory inside your nfs,tftp,dhcp etc... server, copying files(eg. /usr/* ) from the server, inside that /diskless dir with the same hierarchy, and this resulted in a structure which would home, your nfs exported, root fs of your nodes. I'm not an expert, but because you said about dynamic libraries, I cannot understand, why this is a problem, you copied /sbin inside /diskless, but you didn't copy /lib or /usr/lib? The problem with dynamic libraries, starts because your /diskless does not have these libraries. > I tried to avoid the problem using the busybox > tools, and it worked a bit better but then it couldn't execute bash > scripts such as rc.sysinit. Have you created an init in your busybox, to chroot(exec switch_root) inside your nfs root fs after mounting it? > As anybody ever encountered such problems and what should I do to > solve it? recompile the kernel of the node or of the server? change > the distribution? Are there any other simpler method to proceed than > using PXE? There are two things you can do. As Douglas Eadline said, it starts by thinking if you want to reinvent the wheel or not. If you have time, machines, if you know that your teachers won't get annoyed and you can work in a university lab, so you will not pay for the power supply yourself:p continue with fedora and all these brainstorming things. You will learn linux administration and propably you will do amazing things. If you don't have time etc. the guys in warewulf, are doing the same job for about 7 years, and they provide you all this knowledge they gained, in a simple installation process. Back in the technical stuff, from your sayings, I think that something is wrong with your /diskless dir(if you have one, of course). I cannot understand why you want to use busybox. We use busybox when why want an initramfs to do specific jobs(such as unlocking and mounting encrypted partitions,yes, I know this is not the best example I could give) before chrooting inside our real root fs and exec init as Mark Hahn said or if we are running embedded. Also, I don't think that you have to change your distribution, and if you don't like PXE, you can see how the guys in LTSP boot( I think they use both PXE and "etherboot" and you can make a choice), but for me, syslinux is fine!
This was my point of view, I hope I helped and if you want to ask something, feel free to send me a mail, or of course, ask again in the list, Panagiotis Christopoulos System Administrator Technological Institute of Athens Department of Informatics _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
