Differences in the boot_command between Ubuntu Server 21.10 and 20.04

vn flag

Is there anyway to troubleshoot the boot_command between the various versions of Ubuntu servers? I spend hours searching google and finding vast differences in way people write the boot command.

I am using packer to create VM's for virtualbox. My current boot command looks like

"<enter><enter><f6><esc><wait> ", "autoinstall ds=nocloud-net;s=http://{{ .HTTPIP }}:{{ .HTTPPort }}/", "<wait><enter>"

This command works on Ubuntu Server 20.04 but fails on version 21.10.

My problem is that there seems to be no consensus on how the boot command should be written:

Another website has:

  "boot_command": [
    "autoinstall ds=nocloud-net;s=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ ",
    "--- <enter>"

Another one I saw had several rows of "<bs><bs><bs><bs><bs><bs><bs><bs>".

I am still searching documents and the internet to find a process of determining what a valid boot_command is.

Does anyone have a boot_command that works with 21.10? If so how did anyone figure out what it should be.

I am relatively new to Ubuntu and I have not used autoinstall in the past and the differences between the old preseed.cfg way and subuquity for servers and the desktop ubuquity are very confusing until I figure out the logic behind it all.

Thanks for any help.

vn flag

Using packer's new HCL2 templates for creating boxes the following boot command works with Ubuntu Server 21.10. For json you can use the older style "boot_command": [] syntax.

boot_command = [
            " <wait>",
            " <wait>",
            " <wait>",
            " <wait>",
            " <wait>",
            "set gfxpayload=keep",
            "linux /casper/vmlinuz quiet<wait>",
            " autoinstall<wait>",
            " ds=nocloud-net<wait>",
            " ---",
            "initrd /casper/initrd<wait>",
David avatar
cn flag
This may work but it does not address the question as it is asked.

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