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Author: Robert Hafner

Using Github Actions OpenID Connect to push to AWS ECR without Credentials

Posted on October 29, 2021November 24, 2021 by Robert Hafner

Learn how to push images from Github to AWS ECR using the Github Actions OpenID Connector.

Why I’m looking for Sponsors on Github

Posted on October 4, 2021January 6, 2024 by Robert Hafner

After two decades of open source development I’m looking for people to sponsor my work.

Getting AWS ECS to work on Ubuntu with Full GPU Support

Posted on July 6, 2020October 30, 2021 by Robert Hafner

I’m a big fan of Amazon ECS- it’s a remarkably simple containerization service that integrates with the rest of AWS’s services relatively easily. While I’d generally prefer to run with Fargate there are times when I need to have a bit more control over the underlying machines- especially when it comes to tasks using GPUs….

A Simple Jekyll Portfolio Theme

Posted on June 3, 2019October 14, 2020 by Robert Hafner

I write a lot of software, and I like sharing it with the world. So when I decided to redo my portfolio it was only natural that I release the theme itself as an open source project.

GitStars – A Github API for Front End Development

Posted on May 27, 2019May 26, 2019 by Robert Hafner

TLDR: GitStars Github, Documentation, and New Badges. Developers love badges. For these reason there are a ton of different Github Badges websites that let you build out your own badges for your projects. Most of them have the same issue though- they stop working quickly due to the Github API Ratelimiting, which only allows 60…

secretcli – an interface for the AWS Secrets Manager

Posted on October 21, 2018October 20, 2018 by Robert Hafner

I love the AWS Secrets Manager, but have found the awscli tools for it to be a bit bulky. Most of the time all I want to do is download a file, edit it, and upload it again- and even then I normally just want to quickly change a single value inside of my “secret”….

urlparser – a simple python program for extracting info from URLs

Posted on October 13, 2018October 12, 2018 by Robert Hafner

I regularly run into the need to use part of a URL inside of shell scripts- such as extracting the hostname and port from a URL in order to check if the service is reachable- and got a bit tired of screwing with regex. The urllib python library’s parse component is a great tool for…

ec2details, the missing EC2 Instance Metadata API

Posted on March 28, 2018April 3, 2018 by Robert Hafner

When working with the AWS EC2 service in a programmatic way I’ve repeatedly run into a simple problem- how can I get up to date metadata about the various instance types in a programmatic way? It turns out this simple problem does not actually have a simple solution. AWS offers their Bulk API, which has…

GitConsensus now available as a Github App

Posted on February 28, 2018February 27, 2018 by Robert Hafner

Last year I introduced a way to manage open source projects with GitConsensus, an open source Github bot that anyone can download and run. Today running GitConsensus is even easier with the availability of a new GitConsensus GitHub App. Developers can now add GitConsensus directly to their repositories simply by enabling it in GitHub and…

Manage Github Pull Requests with gitconsensus

Posted on August 23, 2017August 23, 2017 by Robert Hafner

This weekend I dug into the Github API to build gitconsensus, which lets communities create truly democratic projects using Reactions as a voting mechanism. Projects can define consensus rules (minimum age of pull request, quorum for votes, threshold needed for passing) using a yaml file in their project root. Pull Requests that meet the consensus…

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About

Robert Hafner is a Principal Engineer based in Chicago focusing on distributed applications, infrastructure, and security. This blog is a running journal of projects, tutorials, and random ideas that pop into his head.

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