Emerson Maciel’s Post

🚨 One of the biggest IAM mistakes I see in AWS architectures: People think policies ADD permissions. They don’t. They INTERSECT. 🔐 Permission Boundary → limits 🔐 Session Policy → limits 🔐 SCP → limits 🔐 Resource Policy → can deny everything IAM works like math, not intuition. Once you start thinking in sets and intersections, debugging access becomes predictable, and secure architecture finally clicks. Have you ever lost hours troubleshooting IAM? 😅👇 #AWS #CloudSecurity #IAM #SolutionsArchitect #CloudArchitecture #AWSSecurity #DevSecOps #CloudEngineering

Most EKS clusters are running with broken IAM setups. And most teams don’t even realize it. 🫆 If your workloads need access to AWS services like S3 or RDS, one question matters: How should your pods authenticate to AWS? 🤯 For years: IRSA. ❌ Now: EKS Pod Identity. ✅ And it’s not just simpler — it changes the game: 🔥 no OIDC setup 🔥 fewer STS calls 🔥 better scalability I wrote a deep dive on IRSA vs Pod Identity — including architecture, performance and real production pitfalls. ⚠️ Link to the article in the comments. What are you using today? 🚀 #AWS #EKS #Kubernetes #CNCF #CloudNative

Day 26 of My AWS Solutions Architect Journey Today I learned about disaster recovery strategies in AWS and how to design systems that can survive failures. Key strategies: • Backup & Restore : lowest cost but slow recovery • Pilot Light : only core components running in another region • Warm Standby : scaled-down full system ready to scale • Active-Active : fully running systems across regions for near-zero downtime One key takeaway: choosing the right strategy depends on business needs, especially recovery time (RTO) and acceptable data loss (RPO). Understanding these trade-offs is critical for designing resilient cloud architectures. #AWS #DisasterRecovery #CloudArchitecture #SolutionsArchitect #AWSCertification

A serverless function might look simple, but behind the scenes you still need security, monitoring, and observability. Here are the most important pieces. 🔐 IAM Execution Role Every Lambda function runs with an IAM role. This role defines what AWS services the function can access. Best practice: Least privilege always. Example: Lambda reading S3 → only allow s3:GetObject Not full S3 access. ⚙️ Environment Variables Never hardcode configuration in code. Use environment variables for: • API keys • Database endpoints • Feature flags This makes deployments cleaner and safer. 📊 Monitoring with CloudWatch CloudWatch automatically collects: • Logs • Metrics • Errors • Invocation counts When something fails, logs are your best friend. 🔎 Tracing with X-Ray X-Ray helps visualize how requests travel across services. Example flow: API Gateway → Lambda → DynamoDB If latency appears, you can see exactly where it happens. Serverless removes servers, but observability becomes even more important, because when something breaks…you can't SSH into anything. #AWS #Lambda #CloudSecurity #Serverless #CloudEngineering #AWSCommunity #LearningInPublic #CloudComputing

💡 If you remember just ONE thing about AWS IAM: Think like the evaluation engine. IAM access isn’t random. It follows a very precise order. ⚙️ Step 1 → Start with IAM Policy 🛡 Step 2 → Apply Permission Boundary 🔐 Step 3 → Apply Session Policy 🏛 Step 4 → Apply SCP 📦 Step 5 → Check Resource Policy 🚫 Step 6 → Look for Explicit Deny Every layer removes possibilities. If an action disappears in any step → it never reaches the final decision. Security becomes much easier when you stop guessing and start thinking like the engine. What AWS topic should I break down next? 👇 #AWS #IAM #CloudSecurity #SolutionsArchitect #CloudArchitecture #AWSSecurity #DevSecOps #CloudEngineering

Still using master password for database authentication ? Implemented IAM based authentication for Amazon RDS to remove the need for storing database passwords and improve overall security. This approach uses short lived tokens, centralized IAM policies, and SSL connections to provide secure and scalable database access. It also enables fine grained control such as read only and read write roles. The setup included IAM policies, database user mapping, token generation, and secure access to private RDS instances using SSM port forwarding. A simple shift but a strong improvement in security and DevOps practices. #AWS #DevOps #CloudSecurity #RDS #IAM

This article explores how HCP Vault Dedicated was engineered for data plane resilience during AWS regional outages. I found it interesting that the lessons learned from these real challenges are shaping the future enhancements of the platform. How do you ensure resilience in your systems during unexpected outages?

Day 8 of My AWS Solutions Architect (SAA-C03) Preparation Today was a deep dive into AWS IAM, one of the most critical (and tricky) exam domains. Key learnings: 🔹 IAM evaluates permissions with Explicit DENY > ALLOW > Implicit DENY 🔹 IAM Roles provide temporary credentials (never store keys on EC2) 🔹 Cross-account access requires roles + trust policies 🔹 Least privilege is not optional, it’s an architectural principle 🔹 Resource policies (like S3 bucket policies) matter as much as IAM policies Architect takeaway: IAM is not about memorizing JSON — it’s about understanding intent, trust, and boundaries. #AWS #IAM #SAA #CloudSecurity #SolutionsArchitect #LearningInPublic

Connecting two separate VPCs can be streamlined with a clear, four-step plan. First, establish your two distinct VPC environments. Next, create the peering connection, acting as the bridge between them. Then, configure the route tables to direct traffic appropriately. Finally, test the setup to ensure seamless connectivity. This structured approach simplifies inter-VPC communication, enabling efficient data flow and resource sharing. #CloudNetworking #VPC #AWS #NetworkArchitecture #TechTips