# Google\_app\_engine\_flexible\_app

**URL:** <https://discuss.hashicorp.com/t/google-app-engine-flexible-app/29355>\
**Category:** Terraform\
**Created:** [September 10, 2021, 6:01am UTC](https://discuss.hashicorp.com/t/google-app-engine-flexible-app/29355 "2021-09-10T06:01:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![shaakaud](https://sea2.discourse-cdn.com/hashicorp/user_avatar/discuss.hashicorp.com/shaakaud/32/18818_2.png) [@shaakaud](https://discuss.hashicorp.com/u/shaakaud)\
**Post date:** [September 10, 2021, 6:01am UTC](https://discuss.hashicorp.com/t/google-app-engine-flexible-app/29355/1 "2021-09-10T06:01:10Z")

</div>

I am trying to create Google Flexible Appengine using terraform script with automatic scaling enabled. Manually using “gcloud app deploy” command, below configuration (app.yaml) works and flexible appengnine gets deployed in google cloud.

automatic\_scaling:  
min\_num\_instances: 1 \<======  
max\_num\_instances: 15 \<======  
cool\_down\_period\_sec: 180  
cpu\_utilization:  
target\_utilization: 0.85  
target\_concurrent\_requests: 100  
max\_concurrent\_requests: 50

I dont find equivalent configuration to use in terraform script for min\_num\_instances and max\_num\_instances.  
Reference: [https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/app\_engine\_flexible\_app\_version](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/app_engine_flexible_app_version)  
Instead terraform documentation has min\_idle\_instances and max\_idle\_instances. But when i use this for Flexible Appengine, i get the below error,

Error: Error updating FlexibleAppVersion “apps/uday-msb-2/services/versa-rns/versions/v1”: googleapi: Error 400: VM-based automatic scaling should NOT have the following parameter(s): [min\_idle\_instances]

So, i need to implement min\_num\_instances and max\_num\_instances in terraform scripts for Google Flexible App Engine. Please help.

Terraform version used:  
terraform --version  
Terraform v0.15.3  
on linux\_amd64 (ubuntu 18.04)