How do I flush DNS entries in my VPC in AWS?

Question

I recently added VPC Endpoints to my CloudFormation stack. I then deleted my stack and tried to recreate it.

When I tried to recreate it, I got the following error:

private-dns-enabled cannot be set because there is already a conflicting DNS domain for secretsmanager.us-east-2.amazonaws.com in the VPC vpc-63170e0b (Service: AmazonEC2; Status Code: 400; Error Code: InvalidParameter; Request ID: b7d28d81-c2c0-4f44-9642-f22171cf513d)

I suspect the error is here because the VPC's private DNS still has an entry from the last time the stack was created.

Is there a way to manually remove entries from the private DNS of the VPC?

Answer 1

I received a similar error when trying to rename and VPC endpoint in a CloudFormation stack.
There is no option to wait, so I fixed it by using the following steps:

• Log into the AWS Console
• Navigate to VPC -> Vitual Private Cloud -> Endpoints
• In the list of Endpoints, find the entry causing the issue
• CLick on the entry and select Actions -> Delete Endpoint
• Wait for deletion (can take a few minutes)

I then reran my CloudFormation stack and all worked.