How to create a service networking creation from a gcp project to "default" network - sql

Question

I wanted to use the gcloud cli to create an sql instance that is accessible on the default network. So I tried this:
gcloud beta sql instances create instance1 \
--network projects/peak-freedom-xxxxx/global/networks/default
And I get the error
ERROR: (gcloud.beta.sql.instances.create) [INTERNAL_ERROR] Failed to create subnetwork.
Please create Service Networking connection with service 'servicenetworking.googleapis.com'
from consumer project '56xxxxxxxxx' network 'default' again.
When you go to the console to create it, you can check Private IP you can see this:
And there's an "Allocate and connect" button. So I'm guessing that's what I need to do. But I can't figure out how to do that with the gcloud cli.
Can anyone help?
EDIT 1:
I've tried setting the --network to https://www.googleapis.com/compute/alpha/projects/testing-project-xxx/global/networks/default
Which resulted in
ERROR: (gcloud.beta.sql.instances.create) [INTERNAL_ERROR] Failed to
create subnetwork. Set Service Networking service account as
servicenetworking.serviceAgent role on consumer project
Then I tried recreating a completely new project and enabling the Service Networking API like so:
gcloud --project testing-project-xxx \
services enable \
servicenetworking.googleapis.com
And then creating the DB resulted in the same error. So I tried to manually add the servicenetworking.serviceAgent role and ran:
gcloud projects add-iam-policy-binding testing-project-xxx \
--member=serviceAccount:service-PROJECTNUMBER#service-networking.iam.gserviceaccount.com \
--role=roles/servicenetworking.serviceAgent
This succeeded with
Updated IAM policy for project [testing-project-xxx].
bindings:
- members:
- user:email#gmail.com
role: roles/owner
- members:
- serviceAccount:service-OJECTNUMBERRP#service-networking.iam.gserviceaccount.com
role: roles/servicenetworking.serviceAgent
etag: XxXxXX37XX0=
version: 1
But creating the DB failed with the same error. For reference, this is the command line I'm using to create the DB:
gcloud --project testing-project-xxx \
beta sql instances create instanceName \
--network=https://www.googleapis.com/compute/alpha/projects/testing-project-xxx/global/networks/default \
--database-version POSTGRES_11 \
--zone europe-north1-a \
--tier db-g1-small

Answer 1

the network name of form "projects/peak-freedom-xxxxx/global/networks/default" is for creating SQL instances under shared VPC network. if you want to create an instance in a normal VPC network you should use:
gcloud --project=[PROJECT_ID] beta sql instances create [INSTANCE_ID]
--network=[VPC_NETWORK_NAME]
--no-assign-ip
where [VPC_NETWORK_NAME] is of the form https://www.googleapis.com/compute/alpha/projects/[PROJECT_ID]/global/networks/[VPC_NETWORK_NAME]
for more information check here.
Note: you need to configure private service access for this and it's one time action only. follow instructions here to do so.