• Nov 16, 2025 by Petri Kallberg

    You don't need NAT gateway to deploy Lambda into VPC

    In this episode of VPC Dealers we're taking on a Lambda function that's been running in a VPC with NAT gateway for years. It works fine but those hourly charges keep adding up. Time to do what Ant did with that Maserati Biturbo - rip out the old combustion engine and drop in something electric. We're converting from NAT gateway to Egress-only gateway with IPv6, cutting the running costs while keeping all the functionality.
  • Jul 25, 2025 by Petri Kallberg

    Debugging Lambda

    AWS Lambda remote debugging allows debugging Lambda functions running in the cloud directly from local IDE. With this new capability, it is possible use familiar debugging tools like breakpoints, variable inspection, and step-through debugging with functions deployed in the cloud.
  • Jun 19, 2025 by Petri Kallberg

    Analyze This

    Those of you who have been working as network admin or someone who's work depends on network, you know when things stop working, network is always first to blame until proven innocent. To get to correct root cause it is important to quickly rule out, or find evidence of, network problems. This is where AWS Reachability Analyzer can help network admins but also let anyone to verify basic requirements for connectivity from point A to B (and back again) are in-place.
  • Dec 30, 2024 by Petri Kallberg

    VPC Dealers

    In this episode I've inherited an old web service build on common VPC design for its time. Architecture is basicly ok and fit for the purpose. Public and private resources are in their separate subnets. Only the application load balancer (ALB) is exposed to internet and EC2 instances in private subnets are protected from direct internet access. But today we can do better and with little effort, make it run better, cheaper and be more secure. Pick any 3 ;-)
  • Nov 29, 2024 by Petri Kallberg

    Access Red Hat Knowledge Base from AWS console

    At the age of genAI it is valuable to have access to expert generated content and not just trying out random advices found from internet forums full of chatbots. If you are working as linux admin, and especially when using RHEL or one of it's derivative distributions Red Hat Knowledge Base can become very helpful resource. But some of the content requires a subscription ...