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sysbuild.sh
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$FreeBSD$ About sysbuild.sh ================= I have been running -current on my laptop since before FreeBSD 2.0 was released and along the way developed this little trick to making the task easier. sysbuild.sh is a way to build a new FreeBSD system on a computer from a specification, while leaving the current installation intact. sysbuild.sh assume you have two partitions that can hold your rootfs and can be booted, and roughly speaking, all it does is build a new system into the one you don't use, from the one you do use. A partition named /freebsd is assumed to be part of your layout, and that is where the sources and ports will be found. If you know how nanobsd works, you will find a lot of similarity. HOWTO ===== In all likelihood, it is easier if we imagine you start with a blank computer. Grab a FreeBSD install ISO and boot it. Create four disk slices: ad0s1 = 5GB ad0s2 = 5GB ad0s3 = 5GB ad0s4 = the rest Create a root filesystem in s1a filling the entire ad0s1 slice. Create a swap partition, if you want one, in ad0s4b. Install the boot0 bootmanager. Install the "Minimal" FreeBSD system into ad0s1a. Reboot from the newly installed system. Run these commands to set up the other partitions sysbuild.sh cares about: # /freebsd filesystem newfs -b 4096 -f 512 -O2 -U /dev/ad0s3 echo "/dev/ad0s3 /freebsd ufs rw 2 2" >> /etc/fstab mkdir /freebsd mount /freebsd # deputy rootfilesystem bsdlabel -B -w /dev/ad0s2 newfs -O2 -U /dev/ad0s2a Next, install ports and sources: cd /usr rm -rf ports src ln -s /freebsd/src ln -s /freebsd/ports cd /freebsd mkdir ports src packages svn co https://svn0.us-east.FreeBSD.org/base/stable/10 src svn co https://svn0.us-east.FreeBSD.org/ports/head ports And we should be ready to try a shot: cd /root cp /usr/src/tools/tools/sysbuild/sysbuild.sh . sh sysbuild.sh |& tee _.sb If it succeeds, you should be able to: boot0cfg -s 2 -v /dev/ad0 reboot And come up with your newly built system. Next time you want a new system, you just run sysbuild.sh again and boot slice 1 when it's done. TWEAKS ====== The sysbuild.sh script takes various parameters: -c specfile # configure stuff, see below. -w # skip buildworld, assume it was done earlier. -k # skip buildkernel, ---//--- -b # skip both buildworld & buildkernel -p # install cached packacges if found. The specfile is a shellscript where you can override or set a number of shell variables and functions. A partial example: # use a kernel different from GENERIC KERNCONF=SMP # Cache built packages, so we can use -p PKG_DIR=/freebsd/packages # Mount ports distfiles from another machine REMOTEDISTFILES=fs:/rdonly/distfiles # Fetch distfiles through a proxy FTP_PROXY=http://127.0.0.1:3128/ HTTP_PROXY=http://127.0.0.1:3128/ export FTP_PROXY HTTP_PROXY # We want these ports PORTS_WE_WANT=' /usr/ports/archivers/unzip /usr/ports/archivers/zip /usr/ports/cad/linux-eagle /usr/ports/comms/lrzsz /usr/ports/databases/rrdtool /usr/ports/devel/subversion-freebsd ' # Files to move over CONFIGFILES=' /root/.ssh /etc/X11/xorg.conf /etc/ssh/ssh_host* /etc/rc.conf /etc/rc.local ' # Shell functions to tweak things # (This makes commits to /etc mostly painless) final_chroot() ( chpass -p "\$1\$IgMjWs2L\$Nu12OCsjfiwHHj0I7TmUN1" root pw useradd phk -u 488 -d /home/phk -c "Poul-Henning Kamp" \ -G "wheel,operator,dialer" -s /bin/csh -w none chpass -p "\$1\$VcM.9Ow8\$IcXHs0h9jsk27b8N64lOm/" phk sed -i "" -e 's/^DS/DSorigo.freebsd.dk/' /etc/mail/sendmail.cf sed -i "" -e '/console/s/^/#/' /etc/syslog.conf echo "beastie_disable=YES" >> /boot/loader.conf touch /root/.hushlogin )
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