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AWS VPC Subnet Planner — A Free Tool for CIDR Calculation and Subnet Design
Planning AWS VPC subnets by hand is tedious. You need to split a CIDR block across multiple Availability … Read more
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How to Deploy .NET Apps on EC2 with Docker Compose and Nginx
Two .NET apps, one EC2 instance, three containers. Docker Compose with Nginx as a reverse proxy is the … Read more
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How to Migrate DynamoDB Tables to a New Naming Convention with AWS CLI
The Problem: Manually Created Resources That Don’t Match Your IaC If you work in ops or platform engineering, … Read more
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How to Access EC2 Instances Using AWS SSM Session Manager (CLI)
AWS SSM Session Manager lets you access EC2 instances without SSH keys, open inbound ports, or bastion hosts. … Read more
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How to Reduce AWS NAT Gateway Costs with VPC Flow Logs and Athena
NAT Gateways are one of the most overlooked cost drivers in AWS. At $0.045 per hour plus $0.045 … Read more
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How to Avoid Unexpected AWS Lambda Costs
Lambda is pay-per-use, so it should be cheap — until it is not. A recursive invocation bug, an … Read more
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How to Configure AWS SSO CLI Access for Windows PowerShell
AWS SSO (now officially called AWS IAM Identity Center) lets you log into multiple AWS accounts from the … Read more
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How to Configure AWS SSO CLI Access for Linux Ubuntu
This guide shows you how to configure AWS SSO CLI access (now called AWS IAM Identity Center) on … Read more
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How to Extract S3 Payload from SQS + SNS Event in AWS Lambda
When S3 sends notifications through SNS and then SQS before reaching your Lambda function, the actual S3 event … Read more
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Solve ‘yum: command not found’ in AWS Lambda Python 3.12+ Base Image
If your Lambda Dockerfile suddenly breaks with yum: command not found after upgrading to the Python 3.12 base … Read more