How to attach an existing role to serverless.yml? - amazon-web-services

Question

I want to attach an existing role to my serverless.yml file, I have created a role in aws console, my code works fine when I test it in aws console, but when I try to test it with the http endpoint it gives me the following:
{"message": "Internal server error"}
I think is because I did not specify any role in the serverless.yml file for the simple reason that I don't know how to do it.
Here is my serverless.yml file :
Resources:
ec2-dev-instance-status:
Properties:
Path: "arn:aws:iam::119906431229:role/lambda-ec2-describe-status"
RoleName: lambda-ec2-describe-status
Type: "AWS::IAM::Role"
functions:
instance-status:
description: "Status ec2 instances"
events:
-
http:
method: get
path: users/create
handler: handler.instance_status
role: "arn:aws:iam::119906431229:role/lambda-ec2-describe-status"
provider:
name: aws
region: us-east-1
runtime: python2.7
stage: dev
resources: ~
service: ec2
Please help.
Thank you.

Answer 1

According to the documentation, there's a few ways to attach existing roles to a function (or entire stack)
Role defined as a Serverless resource
resources:
Resources:
myCustRole0:
Type: AWS::IAM::Role
# etc etc
functions:
func0:
role: myCustRole0
Role defined outside of the Serverless stack
functions:
func0:
role: arn:aws:iam::0123456789:role//my/default/path/roleInMyAccount
Note that the role you use must have additional permissions to log to cloudwatch etc, otherwise you won't get logging.