Unable to establish SSH connection after Reboot due to change of IP - Hyper-V

[Souldiv]

So, I am trying to build an image of Ubuntu-22.04-server on Hyper-V using packer. Packer is able to do the initial SSH connection with machine after it is booted and provided with the pre-seed link, I haven't tried using a different builder but if I do not set the machine to reboot it runs till completion. I feel the issue is similar to hashicorp/packer#8528

I am running windows 11 and running packer through powershell. packer version: 1.9.4

Variables file:

boot_command=["<wait3>c<wait3>","linux /casper/vmlinuz quiet autoinstall net.ifnames=0 biosdevname=0 ip=dhcp ipv6.disable=1 ds=nocloud-net\\;s=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ <enter>","initrd /casper/initrd <enter>","boot <enter>"]
disk_additional_size=["150000"]
disk_size="70000"
http_directory="./extra/files/ubuntu/22.04/hyperv"
iso_checksum_type="sha256"
iso_checksum="a4acfda10b18da50e2ec50ccaf860d7f20b389df8765611142305c0e911d16fd"
iso_url="https://releases.ubuntu.com/jammy/ubuntu-22.04.3-live-server-amd64.iso"
output_directory="output-ubuntu2204"
#output_vagrant="./vbox/packer-ubuntu2204-g2.box"
provision_script_options="-z false -h true -p false"
ssh_password="password"
ssh_username="ubuntu"
switch_name="Default Switch"
#vagrantfile_template="./vagrant/hv_ubuntu2204_g2.template"
vlan_id=""
vm_name="packer-ubuntu2204-g2"
uefi_file="extra/files/ubuntu/22.04/uefi.sh"
provision_file="extra/files/ubuntu/shared/provision.sh"
motd_file="extra/files/ubuntu/shared/motd.sh"
zeroing_file="extra/files/ubuntu/shared/zeroing.sh"
neofetch_file="extra/files/ubuntu/shared/prepare_neofetch.sh"

Template:

variable "ansible_override" {
  type    = string
  default = ""
}

variable "boot_command" {
}

variable "disk_size" {
  type    = string
  default = "70000"
}

variable "disk_additional_size" {
  type    = list(number)
  default = ["1024"]
}

variable "memory" {
  type    = string
  default = "1024"
}

variable "cpus" {
  type    = string
  default = "1"
}

variable "iso_checksum" {
  type    = string
  default = ""
}

variable "iso_checksum_type" {
  type    = string
  default = "none"
}

variable "iso_url" {
  type    = string
  default = ""
}

variable "output_directory" {
  type    = string
  default = ""
}

variable "provision_script_options" {
  type    = string
  default = ""
}

variable "output_vagrant" {
  type    = string
  default = ""
}

variable "ssh_password" {
  type    = string
  default = ""
  sensitive = true
}

variable "switch_name" {
  type    = string
  default = ""
}

variable "vagrantfile_template" {
  type    = string
  default = ""
}

variable "vlan_id" {
  type    = string
  default = ""
}

variable "vm_name" {
  type    = string
  default = ""
}

variable "http_directory" {
  type    = string
  default = ""
}

variable "ssh_username" {
  type    = string
  default = "ubuntu"
}

variable  "uefi_file" {
  type    = string
  default = ""
}

variable  "provision_file" {
  type    = string
  default = ""
}

variable  "motd_file" {
  type    = string
  default = ""
}

variable  "neofetch_file" {
  type    = string
  default = ""
}

variable  "zeroing_file" {
  type    = string
  default = ""
}

source "hyperv-iso" "vm" {
  boot_command          = "${var.boot_command}"
  boot_wait             = "1s"
  communicator          = "ssh"
  cpus                  = "${var.cpus}"
  disk_block_size       = "1"
  disk_size             = "${var.disk_size}"
  enable_dynamic_memory = "true"
  enable_secure_boot    = false
  generation            = 2
  guest_additions_mode  = "disable"
  http_directory        = "${var.http_directory}"
  iso_checksum          = "${var.iso_checksum_type}:${var.iso_checksum}"
  iso_url               = "${var.iso_url}"
  memory                = "${var.memory}"
  output_directory      = "${var.output_directory}"
  shutdown_command      = "echo 'password' | sudo -S shutdown -P now"
  shutdown_timeout      = "30m"
  ssh_password          = "${var.ssh_password}"
  ssh_timeout           = "4h"
  ssh_username          = "${var.ssh_username}"
  switch_name           = "${var.switch_name}"
  temp_path             = "."
  vlan_id               = "${var.vlan_id}"
  vm_name               = "${var.vm_name}"
}

build {
  sources = ["source.hyperv-iso.vm"]

  provisioner "file" {
    destination = "/tmp/uefi.sh"
    source      = "${var.uefi_file}"
  }

  provisioner "file" {
    destination = "/tmp/provision.sh"
    source      = "${var.provision_file}"
  }

  provisioner "file" {
    destination = "/tmp/scvmmguestagent.1.0.3.1028.x64.tar"
    source      = "extra/files/scagent/1.0.3.1028/scvmmguestagent.1.0.3.1028.x64.tar"
  }

  provisioner "file" {
    destination = "/tmp/install"
    source      = "extra/files/scagent/1.0.3.1028/install.sh"
  }

  provisioner "shell" {
    execute_command   = "chmod +x {{ .Path }}; {{ .Vars }} sudo -E sh '{{ .Path }}'"
    expect_disconnect = true
    inline            = ["chmod +x /tmp/provision.sh", "chmod +x /tmp/uefi.sh", "mv /tmp/uefi.sh /usr/local/bin/uefi.sh", "/tmp/provision.sh ${var.provision_script_options}", "sync;sync;reboot"]
    inline_shebang    = "/bin/sh -x"
  }

  provisioner "file" {
    destination = "/tmp/motd.sh"
    source      = "${var.motd_file}"
  }

  provisioner "file" {
    destination = "/tmp/prepare_neofetch.sh"
    source      = "${var.neofetch_file}"
  }

  provisioner "file" {
    destination = "/tmp/zeroing.sh"
    source      = "${var.zeroing_file}"
  }

  provisioner "shell" {
    execute_command = "chmod +x {{ .Path }}; {{ .Vars }} sudo -E sh '{{ .Path }}'"
    inline          = ["echo Last Phase",
    "chmod +x /tmp/prepare_neofetch.sh",
    "chmod +x /usr/local/bin/uefi.sh",
    "chmod +x /tmp/zeroing.sh",
    "/tmp/prepare_neofetch.sh",
    "/tmp/zeroing.sh",
    "/bin/rm -rfv /tmp/*",
    "/bin/rm -f /etc/ssh/*key*",
    "/usr/bin/ssh-keygen -A",
    "echo 'packerVersion: ${packer.version}' >>/etc/packerinfo",
    ]
    inline_shebang  = "/bin/sh -x"
  }

}

Screenshots that may be of significance:

Successful initial SSH connection:

Failure to SSH after Provision Step 4, which is right after it completes the provision.sh script

[nywilken]

Hi @Souldiv I moved over this issue to the Hyper-V repository and labeled it as an upstream change. Packer communicators currently don't support reconnecting after a IP change. If possible the workaround would be to reboot but configure the system with a static IP or increase the DHCP lease time to keep the same IP.

[Souldiv]

Thank you for the update!