ERROR: (gcloud.beta.functions.deploy) ... message=[The caller does not have permission] - google-cloud-functions

Question

I am trying to deploy code from this repo:
https://github.com/anishkny/puppeteer-on-cloud-functions
in Google Cloud Build. My cloudbuild.yaml file contents are:
steps:
- name: 'gcr.io/cloud-builders/gcloud'
args: ['beta', 'functions', 'deploy', 'screenshot', '--trigger-http', '--runtime', 'nodejs8', '--memory', '1024MB']
I have given the following roles to my Cloud Build Service account (****#cloudbuild.gserviceaccount.com):
Cloud Build Service Account
Cloud Functions Developer
Yet, in my Cloud Build log I see the following error:
starting build "1f04522c-fe60-4a25-a4a8-d70e496e2821"
FETCHSOURCE
Fetching storage object: gs://628906418368.cloudbuild-source.googleusercontent.com/94762cc396ed1bb46e8c5dbfa3fa42550140c2eb-b3cfa476-cb21-45ba-849c-c28423982a0f.tar.gz#1534532794239047
Copying gs://628906418368.cloudbuild-source.googleusercontent.com/94762cc396ed1bb46e8c5dbfa3fa42550140c2eb-b3cfa476-cb21-45ba-849c-c28423982a0f.tar.gz#1534532794239047...
/ [0 files][ 0.0 B/ 835.0 B]
/ [1 files][ 835.0 B/ 835.0 B]
Operation completed over 1 objects/835.0 B.
tar: Substituting `.' for empty member name
BUILD
Already have image (with digest): gcr.io/cloud-builders/gcloud
ERROR: (gcloud.beta.functions.deploy) ResponseError: status=[403], code=[Forbidden], message=[The caller does not have permission]
ERROR
ERROR: build step 0 "gcr.io/cloud-builders/gcloud" failed: exit status 1
What am I missing?

Answer 1

It would appear that the permissions changed when (perhaps) Cloud Functions went GA. Another customer raised this issue today and I recalled your question.
The Cloud Build robot (${NUM}#cloudbuild.gserviceaccount.com) additionally needs to be a serviceAccountUser of the ${PROJECT-ID}#appspot.gserviceaccount.com account:
NB While the Cloud Build robot local part is the project number (${NUM}), the appspot robot local part is the project ID (${PROJECT})
Please try:
PROJECT=[[YOUR-PROJECT-ID]]
NUM=$(gcloud projects describe $PROJECT --format='value(projectNumber)')
gcloud iam service-accounts add-iam-policy-binding \
${PROJECT}#appspot.gserviceaccount.com \
--member=serviceAccount:${NUM}#cloudbuild.gserviceaccount.com \
--role=roles/iam.serviceAccountUser \
--project=${PROJECT}
Let me know!

Answer 2

I struggled with this too after reading quite a bit of documentation. A combination of the above answers got me on the right track. Basically, something like the following is needed:
PROJECT=[PROJECT-NAME]
NUM=$(gcloud projects describe $PROJECT --format='value(projectNumber)')
gcloud iam service-accounts add-iam-policy-binding \
${PROJECT}#appspot.gserviceaccount.com \
--member=serviceAccount:${NUM}#cloudbuild.gserviceaccount.com \
--role=roles/iam.serviceAccountUser \
--project=${PROJECT}
gcloud iam service-accounts add-iam-policy-binding \
${PROJECT}#[INSERT_YOUR_IAM_OWNER_SERVICE_ACCOUNT_NAME].iam.gserviceaccount.com \
--member='serviceAccount:service-${NUM}#gcf-admin-robot.iam.gserviceaccount.com' \
--role='roles/iam.serviceAccountUser'
Also, I added the "Cloud Functions Developer" role to my #cloudbuild.gserviceaccount.com account via the IAM Console.

Answer 3

According to Cloud Build documentation, for Cloud Functions you have to grant the "Project Editor" role to your service account.
But, Cloud Functions documentation states that alternatively to using the Project Editor role, you can use "the Cloud Functions Developer role [but you have to] ensure that you have granted the Service Account User role". Regarding Service Accounts, it indicates to have "the CloudFunctions.ServiceAgent role on your project" and to "have permissions for trigger sources, such as Pub/Sub or the Cloud Storage bucket triggering your function".
Due to those considerations, my understanding is that the documentation omitted to specify all the roles your service account would need and went directly to indicate to grant the Project Editor role.

Answer 4

You have to update Service Account permissions on Cloud Build settings page.
Here is instructions https://cloud.google.com/cloud-build/docs/deploying-builds/deploy-cloud-run#fully-managed
You just have to set the status of the Cloud Run Admin role to ENABLED on that page:

Answer 5

start your cloud build with auth
steps:
- name: 'gcr.io/cloud-builders/gcloud'
args: ['auth', 'activate-service-account', 'xoxox#xoxo-dev.iam.gserviceaccount.com', '--key-file=account.json', '--project=rabbito-dev']
and then simply your code deployment on cloud function
- name: 'gcr.io/cloud-builders/gcloud'
args: ['beta', 'functions', 'deploy', 'screenshot', '--trigger-http', '--runtime', 'nodejs8', '--memory', '1024MB']

Answer 6

Please add 'Cloud Functions Service Agent' role to your service account alongside 'Cloud Functions Developer'.