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
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