Release installiso 0.1.0

1 files changed, 0 insertions, 193 deletions

diff --git a/_drafts/first-release-of-installiso.md b/_drafts/first-release-of-installiso.md
deleted file mode 100644
index 7c6537d..0000000
--- a/_drafts/first-release-of-installiso.md
+++ /dev/null
@@ -1,193 +0,0 @@
----
-title: "First release of installiso"
-description: "A utility to customize OpenBSD installation images for unattended installation."
-published: 2021-07-24
----
-
-<!-- TODO: Test all commands -->
-<!-- TODO: Reset git history, tag release, build tarball, and man page -->
-<!-- TODO: Test all links -->
-<!-- TODO: Update date -->
-
-One year ago I [posted](/posts/autoinstall-openbsd-on-qemu/) how to script an unattended installation of OpenBSD on the QEMU virtual machine monitor on Linux.
-The script involved setting up a complicated network boot environment because I treated the installation image as a black box.
-Of course, I could have mounted the ISO 9660 image and created a modified image using [`mkisofs(8)`](http://cdrtools.sourceforge.net/private/man/cdrecord/mkisofs.8.html).
-But I didn't know how to insert the [`autoinstall(8)`](https://man.openbsd.org/OpenBSD-6.9/autoinstall) response file into the RAMDISK kernel in the ISO 9660 image.
-That was no surprise -- why would anyone need to change an OpenBSD kernel on Linux.
-
-OpenBSD, on the other hand, includes adequate utilities.
-Thanks to [`vmctl(8)`](https://man.openbsd.org/OpenBSD-6.9/vmctl), [`rdsetroot(8)`](https://man.openbsd.org/OpenBSD-6.9/rdsetroot), and [`mkhybrid(8)`](https://man.openbsd.org/OpenBSD-6.9/mkhybrid), we can modify the ISO 9660 image _and_ the contained RAMDISK kernel.
-The exact process is a bit tedious so I decided to automate it.
-The resulting script is more hacky than pretty but it gets the job done and I found it useful enough to give it a name, `installiso`, and release it today.
-Currently, it's limited to the _amd64_ architecture, though it should work on other architectures alike.
-You can download the very first release [here](/files/installiso-0.1.0.tar.gz).
-The man page is also viewable [here](/files/installiso.8-0.1.0.html).
-Feedback appreciated!
-
-In the remainder of this post I'll show how to use `installiso` to create custom OpenBSD installation images for unattended -- and possibly offline -- installation.
-As an example, I'll show how to create virtual machines on OpenBSD's own virtual machine monitor, [`vmm(4)`](https://man.openbsd.org/OpenBSD-6.9/vmm).
-Finally, I'll list the concrete commands necessary to patch an installation image without `installiso` because I would want to know how it works.
-
-## Installation
-
-You can install the `installiso` utility as follows.
-
-    $ ftp https://www.skreutz.com/files/installiso-0.1.0.tar.gz
-    $ tar -xzf installiso-0.1.0.tar.gz
-    $ cd installiso-0.1.0/
-    $ doas make install
-    $ man 8 installiso
-
-Alternatively, you can run `./installiso.ksh` without installation.
-
-## Usage
-
-Given a response file `install.conf`, and a file-specific file set `site/`, you can download, verify, and customize an official installation image as follows.
-
-    $ installiso -v fetch -r 6.9
-    $ doas installiso -v \
-        patch -i install.conf -s site/ install69.iso custom.iso
-
-You can also specify a mirror, another release or the latest development snapshot, and a [`signify(1)`](https://man.openbsd.org/OpenBSD-6.9/signify) public key if you like.
-See the [man page](/files/installiso.8-0.1.0.html).
-
-## Example
-
-You can create a virtual machine on OpenBSD's own virtual machine monitor, [`vmm(4)`](https://man.openbsd.org/OpenBSD-6.9/vmm), as follows.
-
-First, we create an [`autoinstall(8)`](https://man.openbsd.org/OpenBSD-6.9/autoinstall) response file.
-Here, we'll setup a regular user and authorize an [`ssh(1)`](https://man.openbsd.org/OpenBSD-6.9/ssh) public key.
-Of course, you can skip this step and have the installer mail you the responses recorded during an interactive installation instead.
-
-    $ cat >install.conf <<EOF
-    Change the default console to com0 = yes
-    Which speed should com0 use = 115200
-    System hostname = openbsd-vm
-    DNS domain name = example.com
-    Password for root = *************
-    Start sshd(8) by default = yes
-    Allow root ssh login = no
-    Setup a user = $USER
-    Full name for user $USER = $( userinfo "$USER" | sed -n 's/^gecos[[:space:]]*\(.*\)$/\1/p' )
-    Password for user = *************
-    Public ssh key for user = $( cat "$HOME/.ssh/id_rsa.pub" )
-    What timezone are you in = UTC
-    Location of sets = cd0
-    Set name(s) = site*.tgz
-    Directory does not contain SHA256.sig. Continue without verification = yes
-    EOF
-
-Second, we create a site-specific file set.
-
-    $ mkdir site
-    $ cat >site/install.site <<EOF
-    #! /bin/ksh
-
-    set -o errexit
-
-    # Set OpenBSD mirror server used by pkg_add(1) and other commands.
-    echo "https://cdn.openbsd.org/pub/OpenBSD" > /etc/installurl
-
-    # Permit user group wheel to run any command as root
-    # without entering their password using doas(1).
-    echo "permit nopass keepenv :wheel" > /etc/doas.conf
-
-    # Install packages on the first boot.
-    echo "pkg_add sqlite3" >> /etc/rc.firsttime
-    EOF
-
-Third, fetch and patch an installation image as above.
-
-    $ installiso -v fetch -r 6.9
-    $ doas installiso -v \
-        patch -i install.conf -s site/ install69.iso custom.iso
-
-Forth, we start a virtual machine off a new disk image and the custom installation image.
-The OpenBSD FAQ contains a good [introduction](https://www.openbsd.org/faq/faq16.html) to [`vmm(4)`](https://man.openbsd.org/OpenBSD-6.9/vmm).
-I assume you've setup the network option 2.
-
-    $ vmctl create -s 10G disk.qcow2
-    $ doas vmctl start -c -i 1 -L -m 512M -d disk.qcow2 \
-        -r custom.iso tmp
-
-Finally, we can log into the new virtual machine once the unattended installation has completed.
-
-    $ ssh \
-        -o "StrictHostKeyChecking no" \
-        -o "UserKnownHostsFile /dev/null" \
-        100.64.1.3
-
-## Disklabel template
-
-In the above example, the OpenBSD installer allocates all disk space automatically, see [`disklabel(8)`](https://man.openbsd.org/OpenBSD-6.9/disklabel).
-You can supply a custom disklabel template instead if you need more control.
-
-First, create a disklabel template.
-
-    $ cat >disklabel_template <<EOF
-    /            5G
-    swap         1G
-    /home        2G
-    EOF
-
-Second, add a corresponding URL to the response file.
-
-    $ echo "URL to autopartitioning template for disklabel = http://100.64.1.2:8080/disklabel_template" >> install.conf
-
-Finally, serve the file during the unattended installation.
-
-    $ printf 'HTTP/1.0 200 OK\n\n' |
-        cat - disklabel |
-        nc -lN 8080
-
-## Inner workings
-
-The `installiso patch` command used above
-
-    $ doas installiso -v \
-        patch -i install.conf -s site/ install69.iso custom.iso
-
-boils down to the following commands, excluding error handling, temporary files, options, etc.
-
-First, we extract the ISO 9660 image.
-
-    # vnconfig vnd0 install69.iso
-    # mount -t cd9660 /dev/vnd0c /mnt
-    # mkdir cd
-    # tar -C /mnt -c -f - . | tar -C cd -x -p -f -
-    # umount /mnt
-    # vnconfig -u vnd0
-
-Second, we patch the RAMDISK kernel.
-
-    # gzip -d -o bsd.rd cd/6.9/amd64/bsd.rd
-    # rdsetroot -x bsd.rd disk.fs
-    # vnconfig vnd0 disk.fs
-    # mount /dev/vnd0a" /mnt
-    # install -o root -g wheel -m 0644 -C \
-        install.conf /mnt/auto_install.conf
-    # umount /mnt
-    # vnconfig -u vnd0
-    # rdsetroot bsd.rd disk.fs
-    # gzip -9fnq bsd.rd
-
-Third, we insert the patched kernel and the site-specific file set into the extracted ISO 9660 image.
-
-    # install -o root -g 2000 -m 0755 -C \
-        bsd.rd.gz cd/6.9/amd64/bsd.rd
-    # ( cd site/ && tar -c -z -f ../cd/6.9/amd64/site69.tgz . )
-    # ( cd cd/6.9/amd64/ && ls -l > index.txt )
-
-Finally, we create the bootable ISO 9660 image.
-
-    # mkhybrid -a -R -T -L -l -d -D -N -o custom.iso \
-        -A "Custom OpenBSD 6.9 amd64 Install CD" \
-        -b 6.9/amd64/cdbr -c 6.9/amd64/boot.catalog \
-        cd
-
-[^tmpdir]:
-The `installiso` utility may fail due to not enough space in `/tmp`.
-If so, you can set the `TMPDIR` environment variable of [`mktemp(1)`](https://man.openbsd.org/OpenBSD-6.9/mktemp).
-Remember that [`doas(1)`](https://man.openbsd.org/OpenBSD-6.9/doas) creates a new environment by default, though.
-You can either configure `doas(1)` to keep the `TMPDIR`, or you execute a shell:
-`doas sh -c 'TMPDIR=/path/to/tmp installiso patch ...'`.