Packer build issue with SSH bastion host

Packer
1

Hi all, I’ve been able to run packer smoothly with a default VPC, but I have trouble getting the build to run properly with ssh to a private VPC. If I don’t add a shell provisioner, the AMI gets created normally. With a shell provisioner, I get a very generic error “Error uploading script: his account is currently not available.”. Can anyone help debug?

packer {
  required_plugins {
    amazon = {
      version = ">= 1.2.8"
      source  = "github.com/hashicorp/amazon"
    }
  }
}

source "amazon-ebs" "onebox-xxx-image" {
  ami_name      = "onebox-xxx-${formatdate("YYYYMMDDhhmmss", timestamp())}"
  instance_type = "g4dn.xlarge"
  region        = "us-west-2"
  source_ami_filter {
    filters = {
      name                = "*onebox-xxx*"
      root-device-type    = "ebs"
      virtualization-type = "hvm"
    }
    most_recent = true
    owners      = ["510079xxx"]
  }

  vpc_id = "vpc-xxx"
  subnet_filter {
    filters = {
      "tag:Name" : "xxx*"
    }
    most_free = true
    random    = false
  }
  temporary_key_pair_type = "ed25519"

  security_group_ids = ["sg-xxx"]
  // ssh_interface           = "private_ip"


  // Use SSH
  ssh_host                            = "bastion.xxx.tech"
  ssh_port                            = "443"
  ssh_username                  = "bastion"
  ssh_bastion_agent_auth = true
  ssh_timeout                      = "2m"
}

build {


  name = "focal-packer"
  sources = [
    "source.amazon-ebs.onebox-XXX-image"
  ]

  provisioner "shell" {
    inline = [
      "echo packer"
    ]
  }
}

➜  focal git:(upgrade-onebox-images) ✗ packer build -on-error=ask . 
focal-packer.amazon-ebs.onebox-focal-image: output will be in this color.

==> focal-packer.amazon-ebs.onebox-focal-image: Prevalidating any provided VPC information
==> focal-packer.amazon-ebs.onebox-focal-image: Prevalidating AMI Name: onebox-xxx-20240411212301
    focal-packer.amazon-ebs.onebox-focal-image: Found Image ID: ami-xxx
    focal-packer.amazon-ebs.onebox-focal-image: Found Subnet ID: subnet-xxx
==> focal-packer.amazon-ebs.onebox-focal-image: Creating temporary keypair: packer_xxx ==> focal-packer.amazon-ebs.onebox-focal-image: Launching a source AWS instance...
    focal-packer.amazon-ebs.onebox-focal-image: Instance ID: i-xxx
==> focal-packer.amazon-ebs.onebox-focal-image: Waiting for instance (i-xxx) to become ready...
==> focal-packer.amazon-ebs.onebox-focal-image: Using SSH communicator to connect: bastion.pdx.l5.woven-planet.tech
==> focal-packer.amazon-ebs.onebox-focal-image: Waiting for SSH to become available...
==> focal-packer.amazon-ebs.onebox-focal-image: Connected to SSH!
==> focal-packer.amazon-ebs.onebox-focal-image: Provisioning with shell script: /var/folders/l5/2f4j8lm10dq36hq1yrj1dv1h0000gq/T/packer-shell1684447015
==> focal-packer.amazon-ebs.onebox-focal-image: Error uploading script: his account is currently not available.
==> focal-packer.amazon-ebs.onebox-focal-image: Step "StepProvision" failed
==> focal-packer.amazon-ebs.onebox-focal-image: [c] Clean up and exit, [a] abort without cleanup, or [r] retry step (build may fail even if retry succeeds)? c
==> focal-packer.amazon-ebs.onebox-focal-image: Provisioning step had errors: Running the cleanup provisioner, if present...
==> focal-packer.amazon-ebs.onebox-focal-image: Terminating the source AWS instance...
==> focal-packer.amazon-ebs.onebox-focal-image: Cleaning up any extra volumes...
==> focal-packer.amazon-ebs.onebox-focal-image: No volumes to clean up, skipping
==> focal-packer.amazon-ebs.onebox-focal-image: Deleting temporary keypair...
Build 'focal-packer.amazon-ebs.onebox-focal-image' errored after 49 minutes 13 seconds: Error uploading script: his account is currently not available.