Terraform s3 event notification error - amazon-s3

Question

I am having trouble trying to create s3 event notifications. Does anyone know the resolutions to this?
Error is:
*Error applying plan:
1 error(s) occurred:
* module.Test-S3-Bucket.aws_s3_bucket_notification.s3-notification: 1 error(s) occurred:
* aws_s3_bucket_notification.s3-notification: Error putting S3 notification configuration: InvalidArgument: Unable to validate the following destination configurations
status code: 400, request id: AD9B5BF2FF84A6CB, host id: ShUVJ+TdkpqAZfpeDM3grkF9Vue3Q/AF0LydchperKTF6XdQyDM6BisZi/38pGAh/ZqS+gNyrSM=*
Below is the code that gives me the error:
resource "aws_s3_bucket" "s3-bucket" {
bucket = "${var.bucket_name}"
acl = ""
lifecycle_rule {
enabled = true
prefix = ""
expiration {
days = 45
}
}
tags {
CostC = "${var.tag}"
}
}
resource "aws_s3_bucket_notification" "s3-notification" {
bucket = "${var.bucket_name}"
topic {
topic_arn = "arn:aws:sns:us-east-1:1223445555:Test"
events = [ "s3:ObjectCreated:*", "s3:ObjectRemoved:*" ]
filter_prefix = "test1/"
}
}

Answer 1

If you haven't done it already, you need to specify a policy on the topic that grants the SNS:Publish permission to S3 (only from the bucket specified in the Condition attribute) - if you are also provisioning the topic via Terraform then something like this should do it (we know, as it caught us out just a few days ago too!):
resource "aws_sns_topic" "my-sns-topic" {
name = "Test"
policy = <<POLICY
{
"Version":"2012-10-17",
"Statement":[{
"Effect": "Allow",
"Principal": {
"Service": "s3.amazonaws.com"
},
"Action": "SNS:Publish",
"Resource": "arn:aws:sns:us-east-1:1223445555:Test",
"Condition":{
"ArnLike":{"aws:SourceArn":"${aws_s3_bucket.s3-bucket.arn}"}
}
}]
}
POLICY
}
Hope that helps.

Answer 2

Well, I know that this is not your exact case, but I had the same error and I didn't manage to find an answer here, and because this post is the first that Google gave me, I will leave the answer to my case here in the hope that it will help someone else.
So, I notice that after Terraform apply I had this error and I went to the UI to see what happened and found this message:
The Lambda console can't validate one or more event sources for this trigger. The most common cause is when a source ARN includes a wildcard (*) character. You can manage unvalidated triggers using the AWS CLI or AWS SDK.
And guess what? I really had a wildcard (*) character in ARN like this:
source_arn = "{aws_s3_bucket.bucket.arn}/*"
So I changed it to:
source_arn = aws_s3_bucket.bucket.arn
And it worked. So, if you read this - there might be the same mistake in your case.