Hello,

I am working with packerpy and GCP to be able to load an OVA file to a 
personal bucket and then modify that image and create a new image from 
that, using the provisioners feature in a JSON file.

I have the process to upload to a personal bucket working, but I can't 
figure out how to get packer to find my image in my personal bucket.  
Packer keeps searching the public area.  I didn't see where I can use a 
bucket.

Anyone have any idea on how to get packet to modify the image from the 
personal bucket?

On a separate note, I am able to use packer, in this same manner with AWS, 
just fine.

Here is an example of my JSON for GCP:

{
  "variables": {
    "disk_size": 150,
    "project_id": "proj-id",
    "result_image": "packer-example-{{timestamp}}",
    "source_image": "rhel-7-5-x86-64-minimal-ova",
    "ssh_password": "password",
    "ssh_timeout": "3m",
    "ssh_username": "user",
    "zone": "us-east-1"
  },
  "builders": [
    {
      "disk_size": "{{user `disk_size`}}",
      "image_name": "{{user `result_image`}}",
      "project_id": "{{user `project_id`}}",
      "source_image": "{{user `source_image`}}",
      "ssh_password": "{{user `ssh_password`}}",
      "ssh_username": "{{user `ssh_username`}}",
      "type": "googlecompute",
      "zone": "{{user `zone`}}"
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "source": "./welcome.sh",
      "destination": "/root/",
      "direction": "upload"
    },
    {
      "type": "shell",
      "inline": [
        "chmod +x welcome.sh",
        "./welcome.sh"
      ]
    }
  ]
}

Here is the Python code that uses the above JSON code:
import argparse
import json
from packerpy import PackerExecutable
parser = argparse.ArgumentParser(description='This script modifies a GCP 
image in GCP.')
parser.add_argument('-f', '--json_file', required=True, help='The JSON file 
that contains the changes to make to the image file.')
args = parser.parse_args()
json_file = args.json_file
packer_bin = '/usr/local/bin/packer'
p = PackerExecutable(packer_bin)
(results, output, error) = p.build(json_file)
if results == 0:
  print('Success!')
else:
  print('Error:', error)
print('\nOutput:', output)

If you have any questions, please ask.

Thank you very much!
Wes Quinn

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