# Error invalid instance URLs

**URL:** <https://discuss.hashicorp.com/t/error-invalid-instance-urls/18953>\
**Category:** Terraform\
**Created:** [December 16, 2020, 10:02am UTC](https://discuss.hashicorp.com/t/error-invalid-instance-urls/18953 "2020-12-16T10:02:07Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![sagar-aj7](https://sea2.discourse-cdn.com/hashicorp/user_avatar/discuss.hashicorp.com/sagar-aj7/32/15843_2.png) [@sagar-aj7](https://discuss.hashicorp.com/u/sagar-aj7)\
**Post date:** [December 16, 2020, 10:02am UTC](https://discuss.hashicorp.com/t/error-invalid-instance-urls/18953/1 "2020-12-16T10:02:08Z")

</div>

Error invalid instance URLs: resource “google\_compute\_instance\_group” “t-compute-instance-group”

**Goal** : Create a compute instance and add it to an unmanaged instance group in GCP using terraform.

**Issue** : A compute instance and an unmanaged instance group are being created successfully, but the instance is not being added to the group and giving: **Error invalid instance URLs: resource “google\_compute\_instance\_group” "t-compute-instance-group"**

Able to add the instance to the group manually after running the terraform configuration though.

Service account key has **Project Editor** permission assigned.

Code: [https://github.com/sagar-aj7/terraform\_unmanaged\_inst\_group](https://github.com/sagar-aj7/terraform_unmanaged_inst_group)

Same question on stack overflow: [https://stackoverflow.com/questions/65313133/error-invalid-instance-urls-resource-google-compute-instance-group-t-compute](https://stackoverflow.com/questions/65313133/error-invalid-instance-urls-resource-google-compute-instance-group-t-compute)