Justin Kulesza on Atomic Spin

Handling an AWS NAT Gateway Implicit Dependency with Terraform

Terraform handles most dependencies automatically, but can miss implicit dependencies. Learn how to define an EC2 instance's dependence on a NAT Gateway.

DevOps & System Admin.

Pattern Matching without Regex! – Introducing the Rosie Pattern Language

An overview to the Rosie Pattern Language, an alternative to regular expressions that's easier to understand, easier to maintain, and much faster.

DevOps & System Admin.

Docker run -it & Other Command Line Tips for Beginners

Review of Docker's basic terminology with 4 useful ways (e.g., docker run -it) to leverage the Docker command-line interface to interact with & manage containers.

DevOps & System Admin.

Making Practical Use of OpenSSL’s s_client

OpenSSL's s_client sub-command provides many options for communicating with SSL/TLS servers. Learn about some of the most useful components in this post.

DevOps & System Admin.

Checking for GraphQL Errors with JMeter

While GraphQL runs over HTTP, the HTTP status codes and headers can behave differently than expected with REST API's. Tools like JMeter may not properly detect errors states unless

DevOps & System Admin.

Creating Zendesk Tickets from Slack Slash Command

This application allows a Slack slash command with a dialog to create a support ticket in Zendesk. Once the ticket has been created, the application sends a Slack message to the us

DevOps & System Admin.

Preparing to Launch a New Application – Domain Registration & DNS Hosting

Finding an appropriate DNS hosting provider ahead of an application launch is critical, and if handled improperly, can substantially delay or disrupt a launch.

DevOps & System Admin.

Secure HTTP Proxy with Static IP

Set up a secure HTTP proxy with Squid and Docker on AWS ECS to provide a static IP address for your web applications running on Heroku.

DevOps & System Admin.

Formatting AWS CloudFront and ELB Logs for Easy Review

AWS CloudFront & Elastic Load Balancers access logs are essential for diagnostics. I wrote a few scripts format these logs and make them much more useful.

DevOps & System Admin.

Avoiding Incomplete/Corrupted Files During Processing Operations

Processing incomplete or corrupted files can be avoided using strategies like monitoring filesystem events, and monitoring open file handles.

DevOps & System Admin.

Five of My Favorite Command-Line Utilities

My work often occurs on a remote machine I don't have access to, and it generally must be headless (no GUI). Here's my arsenal of essential CLI utilities.

DevOps & System Admin.

A Script for Deploying Docker-Hosted Applications to AWS ECS

Learn how we deploy Docker-hosted applications using the AWS ECS. A sample deployment script and example repository are provided.

Justin Kulesza

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