Rather than treat both as the same, since untethered has everything up front anyway, go ahead and extract the filesystem.
This makes the mount look more straightforward and makes it so deletion of files from
the image also frees ram.
The changes for getinstalldisk assumed functionality
in ESXi9. Target older
functional level for our purposes.
Also expand the fallback to cover cases where the disk interrogation fails.
The stock Ubuntu approach was inadequate. It would DHCP out every nic and take the fastest result, and no going back.
Now the CDC nic can frequently win that race.
First, rmmod cdc_ether, as a scenario that is completely right out.
But beyond that, let Ubuntu have one shot at multi-nic bringup. Beyond that, maintain a list of all link-up devices.
If the check should fail, then start doing one nic at a time, cycling through them.
Also, the openssl s_client timeout is painfully slow, use subshell and kill to speed up things.
When network configuration is applied, wait until we
can reach the deployment server again before exiting.
This should make us more robust against various potential delays after
changing the nature of network interfaces.
Provide a totally 'clortho' and 'copernicus' free behavior.
This allows some flows to skip the cpio addons to go straight to python.
Some scenarios demand the utilities (initramfs) and others are more awkward with the utilities,
so we enable both.
Add missing pre.d directory to let user know they can use such scripts
Preserve console directievs from kernelargs into installed system
Retry umount during image2disk, if processes have the filesystem busy.
Fix DNS behavior during post phase of installtodisk
Invoke confignet properly during firstboot to set up additional interfaces.
Have sshd run during the install from '/sysroot', for convenience
Fix some cosmetic error output for setupssh
openEuler 24.03 seems closest to el8, so start with that baseline.
Modify el8 handling to recognize a totally missing CA bundle and assume
the original el8 location.
Have osimage recognize openEuler media by presence of openEuler release file.
Reduce obvious output about skipped devices.
Rule out any read-only device.
Amend minimum size to 2GB.
Among same priority devices, select the smallest target.
If debugssh is not requsted, the initramfs is not needed.
Do not unshare the mount namespace, leave the kernel relevant namespace 'normal'
Remove some initramfs content to free up some memory.
