How to limit instance count of firebase functions

Question

I use following firebase cli command to deploy my firebase functions

firebase deploy --only functions

How can I limit the number of instances for functions, when deployed like this? It looks like gcloud command has --max-instances option to limit instances, but couldn't find anything like this for firebase cli.

Answer 1

You can set the maxInstances when you write the function, using runWith and passing in RuntimeOptions

Something like this:

 functions
.runWith({maxInstances: 3})
.https.onCall(() => {});