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Apply Unix Principles to Write Testable Microservices
Microservice architecture paradigm fits well within the Unix’s first principle/philosophy: “Make one program do one thing well”. We l...
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Infrastructure & DevOps
The most popular blog posts about infrastructure & devops on Hacker News. 114 posts.
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Linux Pressure Stall Information (PSI) by Example
[Discuss this article and read other’s comments on the subject on this thread on Hacker News.] The three fundamental building blocks of computers, CPU, I/O and RAM can come under pressure due to co…
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How not to get a $30k bill from Firebase
the secret is in the architecture
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Building an LTE Access Point with OpenWRT Rooter
My LTE internet connection (70 Mbit downstream, 15 MBit upstream) came with a combined Huawei B315s LTE modem/access point. As I was using it for the last two to three years a couple of problems did arise: the internet connection was often shaky, oftentimes the uplink connection got lost and I had to power-cycle the…
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Running VSCode in Docker
A portable development environment, from editor to dependencies.
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AWS API Performance Comparison: Serverless vs. Containers
A performance comparison between three different methods of deploying an API on AWS
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Microsoft is Abandoning SHA-1 Hashes for Updates
Microsoft is shipping a patch to eliminate SHA-1 hashes from its update process. There’s nothing wrong with eliminating SHA-1—but their reasoning may be very interesting.
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Building a Relational Database Using Kafka
In a previous post, I showed how Kafka can be used as the persistent storage for an embedded key-value store, called KCache. Once you have a key-value store, it can be used as the basis for other m…
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Serverless computing: one step forward, two steps back
Serverless computing: one step forward, two steps back Hellerstein et al., CIDR’19 The biennial Conference on Innovative Data Systems Research has come round again. Today’s paper choice is su…
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Nines are not enough: meaningful metrics for clouds
Nines are not enough: meaningful metrics for clouds Mogul & Wilkes, HotOS’19 It’s hard to define good SLOs, especially when outcomes aren’t fully under the control of any single party. Th…
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Howto: Block Amazon and any site using Amazon Web Services
I've recently read about a couple of boycotts trying to call attention to Amazon's bad labor practices. The most recent of these boycotts hopes to lead a boycott on Amazon's induced buying holiday "Prime Day", in solidarity with striking workers in several fulfillment centers in Spain. I support anyone fighting for a…
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The AWS EC2 Windows Secret Sauce
AWS EC2 Secret sauce. How AWS provisions Windows EC2 in the cloud. Instance Pool.
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The Fargate Illusion
I’ve been building a Kubernetes based platform at $work now for almost a year, and I’ve become a bit of a Kubernetes apologist. It’s true, I think the technology is
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Lessons from Building Node Apps in Docker
Here are some tips and tricks I've learned for developing and deploying web applications written for node.js using Docker (2019 edition).
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Monorepos and the Fallacy of Scale
In a recent blog post entitled “Monorepos: Please don’t,” Matt Klein discusses the pros and cons - as it turns out, mostly cons in his view - of monorepos. The long and short of it is that he thinks that they are not a good fit for most teams. After thinking about this question for a few years I have come to the…
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BPF port-based firewall for systemd services
The first post introduced the IPIngressFilterPath and IPEgressFilterPath feature for the upcoming systemd release 243 to support custom BPF programs as firewall for services. There was a simple example for a minimal BPF program written in C and how to load it for a systemd service. Then there was a standalone program…
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Hugo and IPFS: how this blog works (and scales to serve 5k% spikes instantly)
Learnings from real-world experience with IPFS, and the curious stack that powers this website
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bliki: Strangler Fig
Inspired by the strangler figs in Australia, a strangler fig application gradually draws behavior out of its host legacy application