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Discussion on: Creating proxmox templates with packer

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lethargosapatheia profile image
lethargosapatheia • • Edited

I don't think this applies anymore. Ubuntu 20.04 switched to subquity and gave up debian-installer (so preseeding). You're supposed to be using cloud-init directly. That doesn't work for me either, but this is what they announced quite a long time ago (since 2019).

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aaronktberry profile image
Aaron Berry •

Yep that’s right cloud unit is the way to do with the newer distributions. I’ve been meaning to spend some time to do another write up for what that looks like with cloud unit but unfortunately I had to tear down my proxmox lab during a recent move 😬

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mike1237 profile image
mike1237 •

I wrote a script to create a base template on Proxmox that supports cloud-init.
Then you can use proxmox-clone packer builder off of that.
dev.to/mike1237/create-proxmox-clo...

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lethargosapatheia profile image
lethargosapatheia • • Edited

I was able to solve it, actually, up to the point where you have a readily available template with cloud-init ready to read the user-data. Just to give you a head start :)

       "boot_command": [
        "<esc><enter><f6><esc><wait> ",
        "<bs><bs><bs><bs><bs>",
        "ip={{ user `vm_ip` }}::{{ user `vm_gateway` }}:{{ user `vm_netmask` }}::::{{ user `vm_dns` }} ",
        "autoinstall ds=nocloud-net;s=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ ",
        "--- <enter>"
      ]
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This configures autoinstall, which can run cloud-init commands. And will run cloud-init anyway.
These are the variables:

  "variables": {
    "vm_ip": "10.0.0.159",
    "vm_netmask": "255.255.255.0",
    "vm_gateway": "10.0.0.126",
    "vm_dns": "10.0.0.126",
    "search_domain:": "domain.internal",
    "dns_server:": "1.1.1.1",
    "template_name": "ubuntu-20-04.domain.internal",
    "template_description": "Ubuntu 20.04, generated by packer on {{ isotime }}",
    "playbook": "setup/work.yml",
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Then you can reset cloud-init through ansible (run by packer), for example.

If you want to write an updated article, I'll be happy to help, if you think you need any, of course!