You’re implementing a network protocol. You read the specs, make a mental model and a design to fulfill the requirements, do some prototyping, check against existing software implementing the protocol, then continue with the details until the implementation is finished. Yo...
A lot has happened for mox in the past year. And despite good intentions, I haven’t written a blog posts about any of it!
A modern, secure, all-in-one mail server. The goal is to make it easy to run your own mail server. So you can stay in control of y...
I’m a fan of server-sent events, or SSE. They are a very lightweight option to send streaming updates from a webserver to a client. I’m using it in ding, a modest build server for small teams. Ding sends updates about a build (e.g. the build output log, build failure/suc...
I used to write config files for my admittedly small/simple services in JSON. Mostly because they are reasonably easy to read/write as human, and everyone and their programming language can handle it.
It isn’t great though. Not new information, we know this. Still, a quic...
Through the golang issue tracker I recently stumbled upon the JSON-mode of Go download page: https://golang.org/dl/?mode=json&include=all.
Quite useful for build server software that wants to allow builds (of your software) with new Go releases quickly (and automatedly), bu...
Go 1.11beta2 is out. And it includes the new Go modules support, what started as vgo. Go beta’s are delightfully easy to try out:
go get golang.org/dl/go1.11beta2
go1.11beta2 download
I wanted to use it. See how it feels. And… it works pretty good! I even started usin...
Hi! In this blog post I’m announcing duit, which is a
It is pure Go – no C code or external library involved. The asterisk represents the runtime dependence on a helper tool. It provides duit with cros...
Want to see your software break? Run it in an way that is slightly different than usual. For example under a UID that doesn’t have a system account.
I’ve been using Ding to build software. Both Go software and Java software. Resulting in three instances of “fun”.
Ding v0.1.0 has been released just now. Biggest change? Privilege separation. Get it at https://github.com/mjl-/ding.
Ding runs builds under a unique user id (uid), so builds can’t interfere with each other. It already did before this new release. But it was a kludge to s...
A good chunk of the day went into debugging hanging builds in Ding, a new build server. Turns out it wasn’t dings fault.
I had just added privilege separation to Ding. Unfortunately, builds were now hanging… I checked and double check the code. Tested different configur...