Hi Dirk,
Since /system/boot is a preferred path only for kernel modules and their
configurations, You'll likely have to resort to using smartos-isomerge.
It's a tiny node application that takes a platform ISO, a JSON
configuration file plus the files you want to replace and will spit out a
modified image with those. I ended up extracting the kernel and the boot
archive from the resulting image and booting them via TFTP.
Nahum told me about this a few weeks ago. It works indeed.
T.
On 6 October 2015 8:46:53 am "Dirk Steinberg" <[email protected]> wrote:
Hi Nahum (and others),
with great interest I read your blog post about
„Overriding Driver Config Files on SmartOS“
http://blog.shalman.org/overriding-driver-config-files-on-smartos/
<http://blog.shalman.org/overriding-driver-config-files-on-smartos/>
I want to do almost the same, but overriding other files on the
ramdisk, for example the installer script.
I was able to reproduce your example of modifying kernel/drv/sd.conf,
in my case I set the blocksize to 4096 and it did work.
Changing the installer script /smartdc/lib/smartos_prompt_config.sh
did not work — in fact, even the modified /kernel/drv/sd.conf that
clearly took effect when configuring the kernel had been reverted
back to the original under the path /kernel/drv/sd.conf. After looking
around I could find the modified versions of my files under
/system/boot/kernel/drv/sd.conf and
/system/boot/smartdc/lib/smartos_prompt_config.sh
However, that does not help me much, as the installer is launched
from /smartdc/lib/smartos_prompt_config.sh and not
from /system/boot/smartdc/lib/smartos_prompt_config.sh.
The installer script is just an example here, I might want to
override other files in the ramdisk as well.
At the very least, could I place a „hook“ (script) somewhere under
/system/boot that would get called sometime during the bootup
process that would allow me to do whatever changes I want?
Background of this is that I want to modify the ramdisk such that
it brings up DHCP networking and sshd without importing
the zones pool. I also want to inject an ssh key into the ramdisk
image so that after booting and network auto-config I could
login remotely via ssh and run the installer from the ssh session.
Any hints on how to do this?
BTW, the ssh service seems to have tons of dependencies,
way too many to be realistic. Normally, if networking is up,
you should just be able to run sshd. What is the minimalistic way
to get the ssh service running when in the ramdisk environment
without a „zones“ pool?
I still hope to be able to use the GRUB mechanism the override
ramdisk files. However, if this should not be possible, what is
the easiest way to change the actual ramdisk image?
I realize that I could set up a full build system and rebuild the entire
SmartOS including the ramdisk, but this appears to be too much effort.
Is there a way to unpack the ramdisk, make some changes, and repack
the thing?
I am sending this to the list as this might be interesting for others as well.
/Dirk
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