Open documentation

h1. OpenBSD

Everything we need to know when it comes to this amazing OS.

h2. Typical layout

Caution: For any upgrade /usr must have at least 1.1G available space!.

<pre>

a /

b swap

 d:           1000M          3220512  4.2BSD   2048 16384     1 # /tmp

 e:          2000M          4932608  4.2BSD   2048 16384     1 # /var

 f:          4000.0M          7479264  4.2BSD   2048 16384     1 # /usr

 g:          2366.5M         13720480  4.2BSD   2048 16384     1 # /usr/local

 h:          2227.0M         18567040  4.2BSD   2048 16384     1 # /usr/src

 i:          5478.0M         23127904  4.2BSD   2048 16384     1 # /usr/obj

 j:          1000.1M         34346816  4.2BSD   2048 16384     1 # /home

 k:          2000M          4932608  4.2BSD   2048 16384     1 # /var/log

~                                                                         

</pre>

After genuine install, how it looks like

<pre><code class="shell">

rr01# df -h

Filesystem     Size    Used   Avail Capacity  Mounted on

/dev/sd0a      1.6G    100M    1.4G     7%    /

/dev/sd0j      989M    2.0K    940M     1%    /home

/dev/sd0d      989M    8.0K    940M     1%    /tmp

/dev/sd0f      2.3G    1.4G    728M    67%    /usr

/dev/sd0g      2.2G    144K    2.1G     1%    /usr/local

/dev/sd0i      3.9G    2.0K    3.7G     1%    /usr/obj

/dev/sd0h      2.1G    2.0K    2.0G     1%    /usr/src

/dev/sd0e      1.9G   13.9M    1.8G     1%    /var

/dev/sd0k      1.9G   24.0K    1.8G     1%    /var/log

</code></pre>

h2. Libvirt

To install on a headless debian KVM server  (with virt-install ) ...

From https://r0tty.org/blog/headless-kvm-openbsd-install/

* use a dedicated folder (e.g /tmp/lab )

* download the install file (iso file) e.g cd72.iso or install72.iso

* install @growisofs@ (and @genisoimage@)

* create a file where you will insert instructions for openbsd to use the serial console @echo 'set tty com0' > boot.conf@

* update the content of boot.conf with @growisofs -M cd72.iso -l -R -graft-points /etc/boot.conf=boot.conf@

<pre>

root@man021-truserv-jhb1-001 /tmp/lab $ growisofs -M bsd74.iso -l -R -graft-points /etc/boot.conf=boot.conf

Executing 'genisoimage -C 16,308992 -M /dev/fd/3 -l -R -graft-points /etc/boot.conf=boot.conf | builtin_dd of=bsd74.iso obs=32k seek=19312'

I: -input-charset not specified, using utf-8 (detected in locale settings)

Rock Ridge signatures found

Total translation table size: 0

Total rockridge attributes bytes: 2429

Total directory bytes: 8192

Path table size(bytes): 48

Max brk space used 0

309172 extents written (603 MB)

builtin_dd: 192*2KB out @ average infx1352KBps

bsd74.iso: copying volume descriptor(s)

</pre>

* your iso will be updated 

* launch your installation

<pre>

virt-install -n openbsd0 --memory 512 --vcpus 1 --cdrom /var/lib/libvirt/images/cd72.1.iso   --os-variant openbsd7.0  --disk size=10 --network bridge=br899 --graphics none --console pty,target_type=serial 

</pre>

* it seems for pfSense, you should check this https://www.reddit.com/r/sysadmin/comments/46l9jy/installing_pfsense_on_kvm_cliheadless/