How to attach IAM policy to Lambda for DynamoDB access?TypeScript
To achieve this, you will use two main resources,
First, you will create an IAM policy that allows the necessary DynamoDB actions. It's recommended to follow the principle of least privilege, and only grant the permissions that are absolutely necessary for your function.
Next, you will create a Lambda function. For the
roleproperty of the Lambda function, which represents the IAM role used by the Lambda function, you will attach the previously created IAM policy.
Below is the code:
This code does the following:
aws.iam.Policycreates an IAM Policy that allows access to the specified DynamoDB actions on the specified table.
aws.iam.Rolecreates a new IAM role that the Lambda function will assume.
aws.iam.RolePolicyAttachmentconnects our previously created IAM Policy with the IAM Role.
aws.lambda.Functionuses the attached policy to access DynamoDB from within the Lambda function.
Note: Remember to replace
"arn:aws:dynamodb:us-west-2:123456789012:table/my-table"with the ARN of your DynamoDB table.
"lambda-handler.zip"represents the zip file containing your Lambda function code. You'll need to replace this with the path to your own zip file.
index.handlervalue represents the entry point into your Lambda function, in this case a file named
index.jswith an exported function named
handler. Adjust this according to your own Lambda function's entry point.