The role defined for the function cannot be assumed by Lambda

Question

I\'m getting the error \"The role defined for the function cannot be assumed by Lambda\" when I\'m trying to create a lambda function with create-function command.

Answer 1

For me, the issue was that I had an incomplete name for the role. I set

--role arn:aws:iam::000000000000:role/MyRoleName

when it should have been

--role arn:aws:iam::000000000000:role/service-role/MyRoleName

^{(of course my aws id isn't actually 000000000000)}

I discovered this by running

aws iam get-role --role-name MyRoleName

and looking at the "Arn" property in the result set.