vars_file.json

{
    "proxmox_host": "<REDACTED>",
    "proxmox_node": "<REDACTED>",
    "proxmox_api_user": "<REDACTED>",
    "proxmox_api_password": "<REDACTED>",
    "proxmox_url_no_port": "<REDACTED>",
    "template_name": "ubuntu-18-04-{{ isotime \"2016-01-02-T15-04-05\" }}",
    "template_desciption": "Ubuntu 18.04, Base Image",
    "locale": "en_US.utf8",
    "hostname": "packer-build",
    "ssh_fullname": "TEST USER",
    "ssh_password": "Password123@",
    "ssh_username": "TEST_USER",
    "hdwr_cores": "2",
    "hdwr_sockets": "1",
    "hdwr_mem": "2048",
    "hdwr_disk_size": "32G",
    "datastore": "local-lvm",
    "iso": "local:iso/ubuntu-18.04.4_non-live.iso",
    "boot_command_prefix": "<esc><esc><enter><wait>",
    "preeseed.cfg": "preseed.cfg",
    "test_var": "3324"
}