All blog posts
Enabled TLS intercept on Network Firewall Proxy using ACM Private CA. Verified PreRequest phase HTTP method blocking, PostResponse Content-Type filtering, and documented PCA configuration gotchas and Preview-specific limitations.
Hands-on verification of AWS Network Firewall Proxy (Public Preview). Tested NAT Gateway integration, PreDNS domain filtering, source-based access control, and DNS spoofing resistance.
Upgraded AWS JDBC Wrapper from 2.6.4 to 3.2.0 and re-tested Blue/Green Switchover on both PostgreSQL and MySQL. MySQL's connection failure turned out to be timing-dependent (0–1 failures). Summarizes 3.x migration guidance.
Tested Blue/Green Switchover on Aurora MySQL and compared with PostgreSQL. IN_PROGRESS phase was only 3s (vs 12s for PG), but the BG plugin may have 0–1 connection errors (timing-dependent). HikariCP's stale writer problem is engine-agnostic. Plain JDBC stayed on old host for 31s after recovery.
Compared downtime during Blue/Green Switchover across Plain JDBC, HikariCP with retry, and AWS JDBC Driver BG plugin. The plugin recorded 0 failures in 400 queries during testing. HikariCP kept connecting to the old writer — a critical pitfall.
Measured real downtime during Aurora PostgreSQL failover vs Blue/Green Switchover. Failover had 12 connection failures in two separate windows, Blue/Green Switchover ~26s with 6 failures. DNS TTL of 60s is the key bottleneck.
Combine Runtime, Memory, Gateway, and Evaluations into a single AgentCore CLI project to build a personalized tech trend advisor that remembers user expertise, searches the web for latest trends, and auto-measures response quality.
Hands-on verification of AgentCore CLI Evaluations with a custom LLM-as-a-Judge evaluator. Covers on-demand evaluation of agent traces, region constraints for the Evaluator CloudFormation resource, and trace indexing timing.
Hands-on verification of AgentCore CLI Gateway with an external MCP server target. Covers the critical project setup order, deployment-time connectivity checks, and the split between Gateway API and CloudFormation deployment.
Hands-on verification of AgentCore CLI Memory with SEMANTIC, USER_PREFERENCE, SUMMARIZATION, and EPISODIC strategies. Covers async extraction timing, session ID constraints, and the gap between local dev and deployed behavior.