Date: Tue, 28 Aug 2001 11:14:29 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: freebsd-current@FreeBSD.ORG Subject: My Recommended Development/Testing environment for -current Message-ID: <200108281814.f7SIETX34454@earth.backplane.com>
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I'm posting this as an aid to everyone doing freebsd-current development and testing and may not realize how easy it is to setup a development environment. The number one thing is: Don't put the CVS tree or source code on the -current box itself, except for testing purposes. This is what I do: * On my -STABLE box I cvsup the CVS tree nightly (/home/ncvs) from cron: stable> /usr/local/bin/cvsup -g -r 20 -L 2 -h cvsupXXX.freebsd.org /usr/share/examples/cvsup/cvs-supfile * On my -STABLE box I use 'cvs checkout' and 'cvs update' as appropriate to keep a -current source hierarchy up to date. In my case: stable> cd /FreeBSD stable> mkdir FreeBSD-current stable> cd FreeBSD-current stable> cvs -d /home/ncvs checkout src I do the cvs updates manually, depending on what I am testing: stable> cd /FreeBSD/FreeBSD-current/src stable> cvs update * On my -STABLE box I build the -current world. I usually try to build it -DNOCLEAN but if that fails I just rebuild it from scratch. NOTE!!! DO NOT ACCIDENTLY TRY TO INSTALL THE -CURRENT WORLD ON YOUR STABLE BOX!!! stable> cd /FreeBSD/FreeBSD-current/src stable> make -DNOCLEAN -j 10 buildworld * On my -STABLE box I build the -current kernel. Again I try to use -DNOCLEAN to reduce [re]compilation times, but just build it from scratch too some times. NOTE!!! DO NOT ACCIDENTLY TRY TO INSTALL THE -CURRENT KERNEL ON YOUR STABLE BOX!!! stable> cd /FreeBSD/FreeBSD-current/src stable> make [-DNOCLEAN] buildkernel KERNCONF=BLAHBLAH * On my -CURRENT box I install via *** READ ONLY *** NFS mounts. The setup for this is typically: current> mount stable:/FreeBSD /FreeBSD current> mount stable:/usr/obj /usr/obj current> rm -rf /usr/src current> ln -s /FreeBSD/FreeBSD-current/src /usr/src Actual installation of world: current> cd /usr/src current> make installworld Actual installation of kernel: current> cd /usr/src current> make installkernel KERNCONF=BLAHBLAH Note that the development environment is on your -stable machine... that is where you are doing the builds. The only thing you need to do on your -current box is to install them via NFS. * To test the -CURRENT box, i.e. running buildworld on the -current box as a test, I simply unmount /usr/obj and do a buildworld. The source is still NFS mounted from the -STABLE box, but the actual compile runs on the -current box and the results are 'throw away' (meaning that it doesn't screw up the development environment sitting on my -stable machine). current> umount /usr/obj current> cd /usr/src current> /usr/bin/time make -j 30 buildworld ----- KEEPING AN EMERGENCY BACKUP KERNEL When you have a -current kernel that is able to successully installworld and installkernel, and seems to be relatively crash free, you should make a backup of it so you can boot from it. I usually do this: current> cp /kernel /kernel.bak I do not rely on 'kernel.old' since multiple installkernel's will overwrite it. Also, don't rely on KLD's since the backup kernel may not be compatible with the most recently installed module directory. ---- FIREWALL SHOULD BE OPEN BY DEFAULT ON THE CURRENT MACHINE If your -current kernel config is turning on firewall support, aka IPFIREWALL, you should also make the filter permissive by default, aka IPFIREWALL_DEFAULT_TO_ACCEPT. If you don't do this and your (backup) kernel and the ipfw binary get out of sync, you won't be able to use ipfw to open up holes for NFS and such and your backup kernel will be S.O.L. ---- NFS-BASED SOURCE AND NFS-BASED /USR/PORTS ENVIRONMENT STABLE MACHINE "/etc/exports": The export contains non-proprietary data and is read-only, so it is fairly safe to export it generally. If you do not have anything proprietary installed in /usr (e.g. in /usr/local), you can export /usr -alldirs to allow clients to pickup /usr/obj and /usr/ports. /FreeBSD -ro -maproot=root: -network 10.0.0.0 -mask 255.0.0.0 /usr -ro -alldirs -maproot=root: -network 10.0.0.0 -mask 255.0.0.0 # if /usr/obj a separate mount pt on your box #/usr/obj -ro -maproot=root: -network 10.0.0.0 -mask 255.0.0.0 STABLE MACHINE "/usr/ports" topology. This allows you to export /usr/ports read-only via NFS and still allow each client to build and install its own ports: stable> cd /usr/ports stable> rm -rf distfiles stable> ln /usr/ports.distfiles distfiles stable> mkdir /usr/ports.distfiles CURRENT MACHINE "/etc/fstab" entries (note that /usr itself is local disk) stable:/FreeBSD /FreeBSD nfs ro 0 0 stable:/usr/ports /usr/ports nfs ro 0 0 stable:/usr/obj /usr/obj nfs ro 0 0 CURRENT MACHINE "/etc/make.conf" entries: # location for ports temporary files, since /usr/ports is mounted # read-only. WRKDIRPREFIX=/usr/ports.tmp CURRENT MACHINE "/usr/ports" topology. Mounting /usr/ports read-only from the -stable box, you need only create two directories: current> mkdir /usr/ports.distfiles current> mkdir /usr/ports.tmp -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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