Articles
Incident reports, deployment records, and technical explainers covering AWS, Kubernetes, blockchain nodes, reliability, and security.
A field note on a Shiden archive RPC node downgrade: a backup container acquired the RocksDB lock, the old primary hit a litep2p panic, and the node was recovered without deleting chain data.
A practical map of MD5, SHA, PBKDF2, bcrypt, scrypt, Argon2, yescrypt, and historical password schemes, with selection, tuning, and migration guidance.
A growing Go pricing example that makes TDD seams, Red–Green, vertical slices, mock boundaries, and common failure modes concrete.
A reading note on Thereallo's Claude Code prompt steganography post: what was found, when it triggers, and why the implementation matters for developer trust.
A field note from an Ethereum Mainnet Erigon archive-node incident: v3.5.0 kept failing with a gas-used mismatch at block 25393069, and rebuilding only chaindata from existing snapshots recovered the node.
A practical layer-by-layer comparison of Apple container, Docker, and Kubernetes: image handling, process startup, Pod sandboxing, and runtime boundaries.
A reusable EKS and Kubernetes pattern for storing a Google service account JSON in AWS Secrets Manager, mounting it with Secrets Store CSI Driver, and letting Java read it through GOOGLE_APPLICATION_CREDENTIALS.
A field note on fixing a Gnosis Erigon and Lighthouse Engine API connection that looked like a JWT problem but was actually a vhost mismatch.
A field note on adding several archive/RPC nodes with narrow Terraform plans, separate security groups, explicit disk sizing, and private RPC boundaries.
A field note on Astar and Shiden archive/RPC node catch-up: parachain vs relaychain logs, finalized #0, warp sync, pruning flags, snapshots, and version choice.
How to shape a Prometheus and Grafana view around machine health, RPC reachability, sync state, block height, peer count, and per-node filtering.
A field note on debugging a private Erigon JSON-RPC timeout across EC2 instances by separating client failure, node health, socket binding, and security group rules.
A field note on interpreting parachain logs, why bootnodes do not automatically fix slow execution, and why an Erigon archive node can jump to a high block quickly.
A field note on moving a Polygon Erigon archive node from the Chicago hardfork release to the v3.6.1 beta after peer and post-hardfork sync symptoms stayed suspicious.
A practical deployment and troubleshooting record for a Spring Boot service on EKS: ECR, GitLab CI, ArgoCD, Ingress, internal ALB, Route53, and Cloudflare DNS.
A field note on diagnosing a deterministic gas-used mismatch at Polygon's Chicago hardfork activation block and fixing it by upgrading 0xPolygon/erigon from v3.5.0 to v3.6.0.
A field note on tracing a Glue updateJob failure from the console error to IAM group policy, managed policy scope, MFA guardrails, and final simulator validation.
Understand Erigon3 startup, snapshots, Execution, P2P, and Heimdall sync through official docs and real operational logs.
A practical security group change that moved a Polygon Erigon archive node from allow-all inbound traffic to a minimal public surface.
A short field note on diagnosing SSH profiles that fail with too many authentication failures.
A practical migration pattern for replacing a legacy S3 File Gateway, rebuilding cache safely, and moving Windows users with SSM State Manager.