Right now if i need unattended install, I need to customize the official iso
1.take install guestOS with ubuntu-18.10-desktop-amd64.iso as a example: 
  if I need unattended installation with ubuntu-18.10-desktop-amd64.iso, I need 
to uncompress the
  iso, modify boot parameter in file boot/grub/grub.cfg and modify file 
preseed/ubuntu.preseed, 
  and then make a new iso. 

2.take install guestOS with ubuntu-18.10-live-server-amd64.iso as a example:
  if I need unattended installation with ubuntu-18.10-live-server-amd64.iso, 
  I take the following step:
  1)download the example file of answers.yaml at here 
    https://github.com/CanonicalLtd/subi...s/answers.yaml

  2) unsquash the file casper/filesystem.squashfs in the 
ubuntu-18.10-live-server-amd64.iso, 
     and get the folder " squashfs-root", then mkdir subiquity_config in the 
folder of 
     squashfs-root

  3) copy the answers.yaml into the squashfs-root/subiquity_config/

  4) repacking the folder squashfs-root into filesystem.squashfs by using 
mksquashfs command, 
     and repacking the ubuntu-18.10-live-server-amd64.iso by using genisoimage 
command to 
     make iso.


Expect for unattended install:
  1) don't do any change to official iso. when start to install OS, the 
installer can support to 
scan the other CD/DVD to get the config file for unattended install.
  
Expected steps:
  1) mount official iso(such as ubuntu-18.10-desktop-amd64.iso) to CD/DVD 
  2) mount another iso which only include config file for unattended install to 
another CD/DVD.
  3) power on and the installer start to run 
  4) the installer can scan the others CD/DVD and get the config file. It will 
install OS and config OS automatically without any input.

Thanks.


best regards
Yuhua Zou

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https://bugs.launchpad.net/bugs/1803667

Title:
  new requirement for Automatic Installation

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