I understand the process of resizing the disk partition to use the full disk size via raspi-config. Wanted to know a way to automate this process. Here is what I'm trying to do.
I'm trying to do a automated installation which:
Is there a way I can automate this process
Yes, but it probably already does what you want OOTB.
The openssh-server package is installed by default and you can log in with ssh root@<hostname-or-ipaddress>. The default hostname is pi and default password is raspbian.
The standard partitioning is 128MB for /boot and the rest of the sd card is for / (root).
If you don't want to use the rest of the sd card for root (but less), you can do so by specifying rootsize=+xM in installer-config.txt where x is the desired size in Megabytes. In a similar fashion you can also have bootsize=+xM in installer-config.txt to specify the size of the boot partition.
See the Installer customization section for details.
I was able to automate partition expansion to 100% of remaining space with this command:
sudo raspi-config nonint do_expand_rootfs
You're not done until after a reboot.
sudo reboot
