• basic usage
• Google Compute Builder

First download the json key of a existing Service Account with granted roles of:

• Compute Admin
• Service Account User

Packer looks for credentials in the following places, preferring the first location found:

1. An account_file option in your packer file.

2. A JSON file (Service Account) whose path is specified by the GOOGLE_APPLICATION_CREDENTIALS environment variable.

3. A JSON file in a location known to the gcloud command-line tool. (gcloud auth application-default login creates it)

Add the right data according to your Google Cloud Platform porject settings

• project_id
• network
• network_project_id
• subnetwork

Review if you need it to be preemtible, or omit_external_ip and change decriptions and names accordingly

packer validate <file-name>.json 

packer build <file-name>.json 

Check the image from Custom images menu in New VM instance Compute Engine menu