assets/files/packer_template.json

{
    "builders":
    [
        {
            "type": "qemu",
            "format": "raw",
            "accelerator": "kvm",
            "boot_command":
            [
                "{{ user `boot_command_prefix` }}",
                "debian-installer={{ user `locale` }} auto locale={{ user `locale` }} kbd-chooser/method=us ",
                "file=/floppy/{{ user `preseed` }} ",
                "fb=false debconf/frontend=noninteractive ",
                "hostname={{ user `hostname` }} ",
                "/install/vmlinuz noapic ",
                "initrd=/install/initrd.gz ",
                "keyboard-configuration/modelcode=SKIP keyboard-configuration/layout=USA ",
                "keyboard-configuration/variant=USA console-setup/ask_detect=false ",
                "passwd/user-fullname={{ user `ssh_fullname` }} ",
                "passwd/user-password={{ user `ssh_password` }} ",
                "passwd/user-password-again={{ user `ssh_password` }} ",
                "passwd/username={{ user `ssh_username` }} ",
                "-- <enter>"
            ],
            "cpus": "{{ user `vm_cpus`}}",
            "disk_size": "{{ user `image_size` }}",
            "floppy_files":
            [
                "http/{{ user `preseed` }}"
            ],
            "headless": "{{ user `headless` }}",
            "http_directory": "http",
            "iso_checksum": "{{ user `iso_checksum` }}",
            "iso_checksum_type": "{{ user `iso_checksum_type` }}",
            "iso_urls": [ "{{ user `iso_url` }}" ],
            "memory": "{{ user `vm_memory`}}",
            "output_directory": "{{ user `image_name` }}-image",
            "qemuargs":
            [
                [ "-cpu", "host" ],
                [ "-display", "none" ]
            ],
            "qemu_binary":"/usr/bin/qemu-system-x86_64",
            "shutdown_command": "echo '{{ user `ssh_password` }}'|sudo -S shutdown -P now",
            "ssh_password": "{{ user `ssh_password` }}",
            "ssh_username": "{{ user `ssh_username` }}",
            "ssh_wait_timeout": "60m",
            "vm_name": "{{ user `image_name` }}"
        }
    ],
    "provisioners":
    [
        {
            "type": "file",
            "source": "../gem5/util/m5/m5",
            "destination": "/home/gem5/"
        },
        {
            "type": "file",
            "source": "scripts/serial-getty@.service",
            "destination": "/home/gem5/"
        },
        {
            "type": "file",
            "source": "scripts/runscript.sh",
            "destination": "/home/gem5/"
        },
        {
            "type": "shell",
            "execute_command": "echo '{{ user `ssh_password` }}' | {{.Vars}} sudo -E -S bash '{{.Path}}'",
            "scripts":
            [
                "scripts/post-installation.sh"
            ]
        }
    ],
    "variables":
    {
        "boot_command_prefix": "<enter><wait><f6><esc><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "desktop": "false",
        "image_size": "8192",
        "headless": "true",
        "iso_checksum": "34416ff83179728d54583bf3f18d42d2",
        "iso_checksum_type": "md5",
        "iso_name": "ubuntu-18.04.2-server-amd64.iso",
        "iso_url": "http://old-releases.ubuntu.com/releases/18.04.2/ubuntu-18.04.2-server-amd64.iso",
        "locale": "en_US",
        "preseed" : "preseed.cfg",
        "hostname": "gem5",
        "ssh_fullname": "gem5",
        "ssh_password": "12345",
        "ssh_username": "gem5",
        "vm_cpus": "16",
        "vm_memory": "8192",
        "image_name": "ubuntu"
  }

}