Lessons Learned from Building an MCP Client
Takeaways from building a Java-based MCP client and CLI on top of LangChain4J.
Blog posts and articles - ervinszilagyi.dev
Latest blog posts from ervinszilagyi.dev
Latest posts
Building Super Slim Containerized Lambdas on AWS - Revisited
Revisiting techniques for minimizing AWS Lambda container image size, with a sustainability angle.
How to Build a BlueSky RSS-like Bot with AWS Lambda and Terraform
Building a serverless BlueSky bot that reposts RSS feed entries using AWS Lambda and Terraform.
About AWS AI Practitioner (Beta) Exam
My experience taking the AWS AI Practitioner certification during its beta phase.
Recertification and the Current State of AWS Exams
My experience recertifying AWS Professional exams and how the exams have changed.
Terragrunt for Multi-Region/Multi-Account Deployments
Why and how we adopted Terragrunt to manage Terraform across multiple AWS regions and accounts.
Fluent Bit with ECS: Configuration Tips and Tricks
Practical Fluent Bit configuration tips learned from running it with ECS in production.
Why I Am Not Able to Remove a Security Group?
Why Terraform sometimes cannot delete a security group attached to a VPC Lambda, and how to handle it.
Expose our REST API on AWS with a Custom Domain
A practical guide to exposing an AWS REST API behind a custom domain name with Route 53 and ACM.
An Introduction to AWS Batch
An overview of AWS Batch components and how to run containerized batch workloads on AWS.
About OCP Exams
My experience preparing for and taking the Oracle Certified Professional Java exams.
AWS Lambda Extensions with Rust
How to build external AWS Lambda extensions in Rust to hook into the function lifecycle.
Certificate Parsing with domain-recon
Using domain-recon, an open-source Rust tool, to enumerate domains and subdomains via SSL certificates.
Containers: Under the Hood
A deep dive into what containers really are and the Linux primitives that power them.
Electrify your NodeJS AWS Lambdas with Rust
Speeding up NodeJS Lambda functions by calling Rust native addons via Neon and FFI.
Building Super Slim Containerized Lambdas on AWS
Techniques to drastically reduce the size of containerized AWS Lambda images, focused on Rust.
Running Serverless Lambdas with Rust on AWS
Building and deploying AWS Lambda functions written in Rust on the custom runtime.
GCP Associate Cloud Engineer Certification Experience
My experience preparing for and taking the GCP Associate Cloud Engineer exam online.
Deploy Containers with App Runner
Deploying containerized web apps on AWS App Runner straight from GitHub or ECR.
AWS Lambda Graceful Shutdown
Implementing graceful shutdown in AWS Lambda to clean up resources like database connections.