Creating new Cloud Run service revision via API - rest

Question

Do I understand correctly that you cannot create a new Cloud Run service revision via the API ?
Looking under Revisions : https://cloud.google.com/run/docs/reference/rest/v1/namespaces.revisions : "Revisions are created by updates to a Configuration."
If we then check "Configurations" : https://cloud.google.com/run/docs/reference/rest/v1/namespaces.configurations : we only have a GET and a LIST method.

Answer 1

It's not so hard, but you need to know well the Cloud Run service first. Cloud Run implement the Knative API and one of the strength of Cloud Run is to guaranteed the portability on Cloud Run and on any K8S cluster that use Knative on top of it.
Thus,
You have the base URL. Choose your region first.
Then use the create service URL for the creation. You have to know that the namespace_id on Cloud Run managed is your Project_ID.
curl -H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-type: application/json" \
-X POST -d #knative.json \
https://us-central1-run.googleapis.com/apis/serving.knative.dev/v1/namespaces/<Project_ID>/services
If you want to update the revision, use the replace service API. Same thing, but you need to add the name of the service in the URL and PUT it.
curl -H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-type: application/json" \
-X PUT -d #knative.json \
https://us-central1-run.googleapis.com/apis/serving.knative.dev/v1/namespaces/<Project_ID>/services/<ServiceName>
Because Cloud Run is compliant with Knative, the content of the file knative.json is a Knative document (in JSON in my example)
{
"apiVersion": "serving.knative.dev/v1",
"kind": "Service",
"metadata": {
"name": "<ServiceName>",
"namespace": "<Project_ID>"
},
"spec": {
"template": {
"spec": {
"containers": [
{
"image": "gcr.io/knative-samples/helloworld-go",
"env": [
{
"name": "TARGET",
"value": "Go Sample v2"
}
]
}
]
}
}
}
}
Note in this document the service Name and the Namespace (projectID) that you need to change.