How to create GCP custom IAM role with help of .yaml file?

One of the pretty easy ways to create a GCP custom IAM role help of YAML file.

Here is one sample format you can follow on how to create, Hope it will be helpful for you to create a custom role.

Step 1:

To create .yaml file with below editor

nano role-definition.yaml
or 
vim role-definition.yaml
or 
vi role-definition.yaml

As per requirement, custom role define in .yaml file body

title: "Role Editor"
description: "Edit access for App Versions"
stage: "ALPHA"
includedPermissions:
- appengine.versions.create
- appengine.versions.delete

Once YAML file is ready along with your requirement you can simply execute the below CLI gcloud cmd in cloud shell.

gcloud iam roles create editor - project $DEVSHELL_PROJECT_ID \
 - file role-definition.yaml

If you want to excute this cmd from your local laptop that is also possible but you have to install cloud sdk and configure with your project

Create environment variable

export PROJECT_ID=”YOURS_PROJRCT_ID”

gcloud iam roles create editor - project $PROJECT_ID \
 - file role-definition.yaml