Postfix in Docker

To be a maintainer of an email server is hard. One can’t simply apt install default-mta to get a healthy and robust email…

How to control permission of IAM role, created within Cloudformation stack

Cloudformation is a powerful AWS service. You can create any resource, which is allowed by permissions of your deployer user or role.

Aggregating Lambda@Edge logs into one CloudWatch log group

cfn-response with nodejs8.10 and promises

If you’ve come to this article because of its title, you’re most probably aware of what cfn-response is, so you can skip the next section. For others I’m moving to a short introduction of cfn-response module right away.

Number range validation in CloudFormation parameters

Integration of ACM with Nginx via AWS Nitro Enclaves

Everyone prises AWS Certificate Manager for its security and operational excellence.

Operational excellence is because the entire headache of the annual certificate rotation can be healed by the complete…

Step Functions as an ad-hoc scheduling mechanism

How to send emails in 2020

Sending emails is a complicated topic still due to the anti-SPAM war, which lasts for decades already. One can’t…