Packer file to build an Alpine Linux image for Qemu

alpine-img.pkr.hcl

packer {
  required_plugins {
    qemu = {
      source  = "github.com/hashicorp/qemu"
      version = "~> 1"
    }
  }
}

source "qemu" "alpine" {
  iso_url          = "https://dl-cdn.alpinelinux.org/alpine/v3.18/releases/x86_64/alpine-virt-3.18.2-x86_64.iso"
  iso_checksum     = "sha256:6bc7ff54f5249bfb67082e1cf261aaa6f307d05f64089d3909e18b2b0481467f"
  shutdown_command = "echo 'packer' | poweroff"
  disk_size        = "5000M"
  format           = "qcow2"
  accelerator      = "kvm"
  headless         = true
  http_content = {
    "/latest/user_data" = <<EOF
echo running packer > logfile.txt
EOF
  }
  machine_type     = "q35"
  ssh_username     = "root"
  ssh_password     = "vagrant"
  ssh_timeout      = "5m"
  vm_name          = "alpine_3.18.2.qcow2"
  vnc_bind_address = "0.0.0.0"
  vnc_use_password = true
  net_device       = "virtio-net"
  disk_interface   = "virtio"
  boot_wait        = "10s"
  boot_command     = ["<wait>root<enter><wait>setup-alpine<enter><enter>alpine<enter>eth0<enter>dhcp<enter>n<enter><wait10>vagrant<enter>vagrant<enter>UTC<enter><wait10><enter>r<wait5><enter>no<enter><wait><wait5>openssh<enter><wait5>yes<enter>https://github.com/tristanmorgan.keys<enter>vda<enter>sys<enter>y<enter><wait2m><enter><wait10>"]
}

build {
  sources = ["source.qemu.alpine"]

  provisioner "shell" {
    inline = [
      "apk update",
      "apk upgrade",
      "echo packer success."
    ]
  }
}

to run afterwards I used...
qemu-system-x86_64 -machine type=q35,accel=kvm -name alpine_3.18.2.qcow2 -m 512M -drive file=output-alpine/alpine_3.18.2.qcow2,if=ide -nographic -enable-kvm -cpu host

P.S. buried in those boot_commands is a url to public keys, please use your own ones.