Google Deployment Manager - Project creation permission denied - google-cloud-platform

Question

I am getting a 403 PERMISSION_DENIED response from GCP when running the deployment manager to create a deployment that creates a project, two service accounts and sets IAM policy for it using the cloud resource manager API.
- code: RESOURCE_ERROR
location: /deployments/test-deployment/resources/dm-test-project
message: '{"ResourceType":"cloudresourcemanager.v1.project","ResourceErrorCode":"403","ResourceErrorMessage":{"code":403,"message":"The
caller does not have permission","status":"PERMISSION_DENIED","statusMessage":"Forbidden","requestPath":"https://cloudresourcemanager.googleapis.com/v1/projects/dm-test-project","httpMethod":"GET"}}'
Before, I created a project 'DM Project Creation', enable some APIs, assign the Billing Account to it and then create a Service Account.
I already had an Organization node created, so I added the created Service Account in the org node and gave the following IAM roles:
- Project Creator
- Billing Account User
I was actually following this examples from Google Cloud Platform:
https://github.com/GoogleCloudPlatform/deploymentmanager-samples/tree/master/examples/v2/project_creation
https://github.com/GoogleCloudPlatform/deploymentmanager-samples/blob/master/community/cloud-foundation/templates/project/README.md
I run the following command to authenticate with the Service Account:
gcloud auth activate-service-account dm-project-creation#dm-creation-project-0.iam.gserviceaccount.com --key-file=/Users/famedina/Downloads/dm-creation-project-0-f1f92dd070ce.json
Then run the deployment manager passing the configuration file:
gcloud deployment-manager deployments create test-deployment --config config.yaml
imports:
- path: project.py
resources:
# The "name" property below will be the ID of the new project
# If you want your project to have a different name, use the "project-name"
# property.
- name: dm-test-project
type: project.py
properties:
# Change this to your organization ID.
organization-id: "<MY_ORG_ID"
# You can also create the project in a folder.
# If both organization-id and parent-folder-id are provided,
# the project will be created in parent-folder-id.
#parent-folder-id: "FOLDER_ID"
# Change the following to your organization's billing account
billing-account-name: billingAccounts/<MY_BILLING_ACC_ID>
# The apis to enable in the new project.
# To see the possible APIs, use: gcloud services list --available
apis:
- compute.googleapis.com
- deploymentmanager.googleapis.com
- pubsub.googleapis.com
- storage-component.googleapis.com
- monitoring.googleapis.com
- logging.googleapis.com
# The service accounts you want to create in the project
service-accounts:
- my-service-account-1
- my-service-account-2
bucket-export-settings:
create-bucket: true
# If using an already existing bucket, specify this
# bucket: <my bucket name>
# Makes the service account that Deployment Manager would use in the
# generated project when making deployments in this new project a
# project owner.
set-dm-service-account-as-owner: true
# The patches to apply to the project's IAM policy. Note that these are
# always applied as a patch to the project's current IAM policy, not as a
# diff with the existing properties stored in DM. This means that removing
# a binding from the 'add' section will not remove the binding on the
# project during the next update. Instead it must be added to the 'remove'
# section.
iam-policy-patch:
# These are the bindings to add.
add:
- role: roles/owner
members:
# NOTE: The DM service account that is creating this project will
# automatically be added as an owner.
- serviceAccount:98765432100#cloudservices.gserviceaccount.com
- role: roles/viewer
members:
- user:iamtester#deployment-manager.net
# The bindings to remove. Note that these are idempotent, in the sense
# that any binding here that is not actually on the project is considered
# to have been removed successfully.
remove:
- role: roles/owner
members:
# This is already not on the project, but in case it shows up, let's
# remove it.
- serviceAccount:1234567890#cloudservices.gserviceaccount.com```

Answer 1

I ran into this as well, and the error message is not actually explaining the underlying problem.
The key thing is that this is a GET operation, not an attempt to create the project. This is to verify global uniqueness of the project-id requested, and if not unique, PERMISSION_DENIED is thrown.
- code: RESOURCE_ERROR
location: /deployments/test-deployment/resources/dm-test-project
message: '{"ResourceType":"cloudresourcemanager.v1.project","ResourceErrorCode":"403","ResourceErrorMessage":{"code":403,"message":"The
caller does not have permission","status":"PERMISSION_DENIED","statusMessage":"Forbidden","requestPath":"https://cloudresourcemanager.googleapis.com/v1/projects/dm-test-project","httpMethod":"**GET**"}}'
Alot of room for improvement in the resulting error towards the end user.