Latest Insights

CloudWatch PutMetricData AccessDenied: Fixing Monitoring Permission Gaps

When CloudWatch rejects your metrics with AccessDenied, your monitoring goes blind. Learn to configure IAM permissions for custom metrics, logs, and alarms.

2026-05-24 · 8 min read

ElastiCache AUTH Required: Configuring Redis Authentication Correctly

ElastiCache AUTH errors block your application from connecting to Redis. Learn to configure auth tokens, TLS, and security groups for ElastiCache.

2026-05-20 · 8 min read

ECS Task Stopped: How to Read Exit Codes and CloudWatch Logs to Find the Root Cause

A practical guide to debugging ECS task failures — from exit code meanings to CloudWatch log analysis — with the exact CLI commands to diagnose the problem.

2026-05-18 · 9 min read

STS AssumeRole AccessDenied: Fixing Cross-Account Role Trust Policies

STS AssumeRole failures block cross-account access and CI/CD pipelines. Learn to configure trust policies, external IDs, and session policies correctly.

2026-05-17 · 9 min read

API Gateway 403 Missing Authentication Token: Configuration Fixes

The 'Missing Authentication Token' error from API Gateway is misleading — it often means the resource doesn't exist. Learn the real causes and fixes.

2026-05-13 · 9 min read

AWS Well-Architected Review: What I Look For (And What I Almost Always Find)

After conducting dozens of Well-Architected Reviews, the same five findings appear in nearly every account. Here is what they are and why they matter.

2026-05-11 · 10 min read

Secrets Manager ResourceNotFoundException: Finding and Fixing Missing Secrets

ResourceNotFoundException from Secrets Manager derails deployments. Learn to diagnose wrong ARNs, deleted secrets, cross-region issues, and permission gaps.

2026-05-10 · 9 min read

ECR RepositoryNotFoundException and Image Pull Failures in ECS/EKS

Container image pull failures are the #1 deployment blocker. Learn to fix ECR permissions, repository policies, and cross-account image access.

2026-05-06 · 8 min read

SNS/SQS KMS Access Denied: Fixing Cross-Service Encryption Permissions

When SNS can't publish to an SQS queue encrypted with KMS, the error is a permissions maze. Learn to configure KMS key policies for cross-service communication.

2026-05-03 · 8 min read

ALB 502 Bad Gateway: Fixing Target Group and Health Check Misconfigurations

ALB 502 errors mean your load balancer can't reach healthy targets. Learn to diagnose health check failures, security group issues, and target registration problems.

2026-04-29 · 10 min read

AI/ML

From SageMaker POC to Production: The 6 Infrastructure Problems Every ML Team Hits

Your SageMaker notebook works. Now what? The six infrastructure gaps between a working POC and a production ML system — and how to close them.

2026-04-27 · 9 min read

CloudFormation ROLLBACK_COMPLETE: Understanding and Recovering from Stack Failures

A CloudFormation stack in ROLLBACK_COMPLETE state is stuck. Learn why stacks fail, how to extract useful error messages, and strategies for recovery.

2026-04-26 · 9 min read

RDS Storage Full: Why Your Database Ran Out of Space and How to Fix It

A full RDS storage volume causes immediate downtime. Learn to diagnose storage consumption, enable auto-scaling, and prevent this critical failure.

2026-04-22 · 9 min read

FinOps

FinOps in 30 Days: How We Cut a Fintech Startup's AWS Bill by 45%

A week-by-week breakdown of how we reduced a fintech startup's AWS spend from $400K to $220K annually — saving $180K in 30 days.

2026-04-20 · 8 min read

ECS Task Stopped: Diagnosing Container Failures and Placement Errors

ECS tasks stop with cryptic exit codes and placement errors. Learn to decode stopped reasons, fix resource constraints, and prevent container crashes.

2026-04-19 · 10 min read

Lambda Task Timed Out: Fixing VPC, Timeout, and Memory Configuration

Lambda timeouts are often caused by VPC misconfigurations, not slow code. Learn to diagnose network issues, optimize memory, and configure proper timeout settings.

2026-04-15 · 10 min read

S3 403 AccessDenied: The Complete Troubleshooting Guide

S3 403 AccessDenied errors have over a dozen root causes. This guide covers bucket policies, ACLs, Block Public Access, VPC endpoints, and cross-account access.

2026-04-12 · 8 min read

KMS AccessDeniedException: Fixing Key Policy and Grant Misconfigurations

KMS AccessDeniedException blocks encryption operations silently. Learn to untangle key policies, grants, and IAM permissions for AWS KMS.

2026-04-08 · 8 min read

DynamoDB Hot Partitions: How to Design Around the Most Common Performance Problem

A deep dive into DynamoDB partition key design, write sharding, and GSI overloading — with practical table design examples to eliminate throttling for good.

2026-04-06 · 8 min read

InvalidSubnetID.NotFound: Debugging VPC and Subnet Misconfigurations

The InvalidSubnetID.NotFound error halts deployments when subnets are misconfigured. Learn to diagnose VPC issues and fix subnet references across AWS services.

2026-04-05 · 8 min read

EC2 InvalidParameterCombination: Resolving Instance Configuration Errors

The InvalidParameterCombination error blocks EC2 launches due to incompatible settings. Learn the most common mismatches and how to fix them quickly.

2026-04-01 · 9 min read

Serverless

AWS Lambda Timeout: Diagnosing the Root Cause in 30 Minutes

A systematic approach to diagnosing Lambda timeouts — from VPC cold starts to downstream service latency — with the exact CloudWatch queries and CLI commands you need.

2026-03-30 · 7 min read

AWS ThrottlingException: Understanding and Fixing API Rate Limits

ThrottlingException strikes when your application exceeds AWS API rate limits. Learn to identify, handle, and prevent rate limiting across AWS services.

2026-03-29 · 9 min read

ProvisionedThroughputExceededException in DynamoDB: Causes and Fixes

DynamoDB's ProvisionedThroughputExceededException causes cascading failures. Here's how to diagnose hot partitions, fix capacity settings, and prevent throttling.

2026-03-25 · 9 min read