vagrant - preseed.cfg file for auto install ubuntu 20

Question

I try to auto-install and create a packer vagrant VM box with Ubuntu 20. I use this preseed.cfg file for auto submit questions installation :

choose-mirror-bin mirror/http/proxy string
d-i base-installer/kernel/override-image string linux-server
d-i clock-setup/utc boolean true
d-i clock-setup/utc-auto boolean true
d-i finish-install/reboot_in_progress note
d-i grub-installer/only_debian boolean true
d-i grub-installer/with_other_os boolean true
d-i partman-auto-lvm/guided_size string max
d-i partman-auto/choose_recipe select atomic
d-i partman-auto/method string lvm
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-lvm/device_remove_lvm boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
d-i partman/confirm_write_new_label boolean true
d-i passwd/user-fullname string vagrant
d-i passwd/user-uid string 900
d-i passwd/root-password-again password vagrant
d-i passwd/root-password password vagrant
d-i passwd/user-password-again password vagrant
d-i passwd/user-password password vagrant
d-i passwd/username string vagrant
d-i pkgsel/include string openssh-server cryptsetup build-essential libssl-dev libreadline-dev zlib1g-dev linux-source dkms nfs-common
d-i pkgsel/install-language-support boolean false
d-i pkgsel/update-policy select unattended-upgrades
d-i pkgsel/upgrade select full-upgrade
d-i time/zone string UTC
d-i user-setup/allow-password-weak boolean true
d-i user-setup/encrypt-home boolean false
tasksel tasksel/first multiselect standard, ubuntu-server

But process install stop here :

I try to add this line in my preseed.cfg file for resolve and continue process installation but nothing happend :

d-i partman-basicfilesystems/no_swap boolean false
d-i partman-auto/expert_recipe string myroot :: 1000 50 -1 ext4 $primary{ } $bootable{ } method{ format } format{ } use_filesystem{ } filesystem{ ext4 } mountpoint{ / } .
d-i partman-auto/choose_recipe select myroot

How can I response of this questions installation ubuntu for "Use an entire disk" with no encrypt option ?

Is there a default preseed.cfg file for new ubuntu 20 version ? Because my old preseed file ran very well for old version of ubuntu.

Answer 1

等待大神答复