Windows with ssh-communicator failed to execute shutdown command

[luclis]

Overview of the Issue

When you use Packer with ssh communicator, he expect to see somes Unix-like machine. When you specify an shutdown command, he try an command like this : chmod +x /tmp/script_5623.sh; PACKER_BUILDER_TYPE='qemu' PACKER_BUILD_NAME='Windows' PACKER_HTTP_ADDR='10.0.0.2:0' PACKER_HTTP_IP='10.0.0.2' PACKER_HTTP_PORT='0' /tmp/script_5623.sh.
On Windows, chmod isn't find and the build failed.

Workaroud : Use a provisioner and run the shutdown command.

  provisioner "powershell" {
    script            = "../scripts/shutdown.ps1" #shutdown /s /t 10 /f /d p:4:1 /c \"Packer Shutdown\"
  }

Reproduction Steps

1/ Download Packer builder
2/ Download any prerequisites (Windows ISO ; builders ; virtio iso)
3/ Download Unattened.xml
4/ Run the build.

Plugin and Packer version

Packer v1.10.3

packer plugins installed
~/.config/packer/plugins/github.com/hashicorp/qemu/packer-plugin-qemu_v1.1.0_x5.0_linux_amd64
~.config/packer/plugins/github.com/hashicorp/virtualbox/packer-plugin-virtualbox_v1.0.5_x5.0_linux_amd64

Simplified Packer Buildfile

Gist in Reproduction steps.

Operating system and Environment details

Ubuntu 22.04 x64.

Log Fragments and crash.log files

2024/05/05 21:04:39 packer-provisioner-shell plugin: [INFO] RPC client: Communicator ended with: 1
2024/05/05 21:04:39 packer-plugin-qemu_v1.1.0_x5.0_linux_amd64 plugin: 2024/05/05 21:04:39 [DEBUG] Opening new ssh session
2024/05/05 21:04:39 packer-plugin-qemu_v1.1.0_x5.0_linux_amd64 plugin: 2024/05/05 21:04:39 [DEBUG] starting remote command: chmod +x /tmp/script_5623.sh; PACKER_BUILDER_TYPE='qemu' PACKER_BUILD_NAME='Windows' PACKER_HTTP_ADDR='10.0.2.2:0' PACKER_HTTP_IP='10.0.2.2' PACKER_HTTP_PORT='0'  /tmp/script_5623.sh
==> qemu.Windows: 'chmod' n'est pas reconnu en tant que commande interne
==> qemu.Windows: ou externe, un programme ex�cutable ou un fichier de commandes.
2024/05/05 21:04:39 packer-plugin-qemu_v1.1.0_x5.0_linux_amd64 plugin: 2024/05/05 21:04:39 [ERROR] Remote command exited with '1': chmod +x /tmp/script_5623.sh; PACKER_BUILDER_TYPE='qemu' PACKER_BUILD_NAME='Windows' PACKER_HTTP_ADDR='10.0.2.2:0' PACKER_HTTP_IP='10.0.2.2' PACKER_HTTP_PORT='0'  /tmp/script_5623.sh
2024/05/05 21:04:39 packer-plugin-qemu_v1.1.0_x5.0_linux_amd64 plugin: 2024/05/05 21:04:39 [INFO] RPC endpoint: 
[...]
2024/05/05 21:04:39 packer-plugin-qemu_v1.1.0_x5.0_linux_amd64 plugin: 2024/05/05 21:04:39 Deleting floppy disk: /tmp/packer1614611994
==> qemu.Windows: Deleting output directory...
2024/05/05 21:04:39 [INFO] (telemetry) ending qemu.Windows2
Build 'qemu.Windows' errored after 12 minutes 56 seconds: Script exited with non-zero exit status: 1. Allowed exit codes are: [0]

[lbajolet-hashicorp]

Hi @luclis,

That's weird, the powershell provisioner doesn't chmod anything whatsoever, I'm curious on how you're running into this. If possible would you mind sharing more about your template?
If you're able to make a minimal example/repo that we can reproduce the problem with, that'd be ideal so we can validate this is indeed a Packer/plugin bug, and if it's not we may be able to steer you towards a resolution.

Thanks!

[luclis]

Hi @lbajolet-hashicorp,
Yep, I can send you more info. Did you see the gist I included ? The're all I have in my template.
If I remember clearly, it was the shutdown command who failed with the chmod error. I rebuilding them and confirm it as soon as I can.

[lbajolet-hashicorp]

Hi @luclis,

I hadn't seen the links to the gists for both the build and the unattend.xml indeed, my bad 😅

I'll check locally if I can replicate the issue, thanks for the update!

[luclis]

Hi Lucas,

I rebuild it this morning and can't reproduce the issue 🤔
I'll dig in my templates log and see what I've done.

[luclis]

Clossing as "can't reproduce", I'll reopen it if I find what I've done. Thanks