Packer template to bake Nexus GCP image

template.json

{
    "variables" : {
        "zone" : "YOUR ZONE",
        "project" : "YOUR PROJECT ID",
        "source_image" : "centos-7-v20181210",
        "ssh_username" : "packer",
        "credentials_path" : "PATH/account.json"
    },
    "builders" : [
        {
            "type": "googlecompute",
            "account_file": "{{user `credentials_path`}}",
            "project_id": "{{user `project`}}",
            "source_image": "{{user `source_image`}}",
            "ssh_username": "{{user `ssh_username`}}",
            "zone": "{{user `zone`}}",
            "image_name" : "nexus-v3-14-0-04"
          }
    ],
    "provisioners" : [
        {
            "type" : "file",
            "source" : "./nexus.rc",
            "destination" : "/tmp/nexus.rc"
        },
        {
            "type" : "file",
            "source" : "./repository.json",
            "destination" : "/tmp/repository.json"
        },
        {
            "type" : "shell",
            "script" : "./setup.sh",
            "execute_command" : "sudo -E -S sh '{{ .Path }}'"
        }
    ]
}