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Misconfigured Circuit Breakers
Learn to predict how your application will behave in times of failure and how to configure every parameter for your Semian circuit breaker.
Topics /
Infrastructure & DevOps
The most popular blog posts about infrastructure & devops on Hacker News. 4,374 posts.
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Linux kernel cgroups writeback high CPU troubleshooting
Read on to learn how we used network packet captures and BPF to debug web server performance, ultimately uncovering a Linux kernel performance issue. This investigation was a collaboration between myself and my colleagues.
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Case Study: ByteDance Uses eBPF to Enhance Networking Performance
Bytedance, a global technology company operating a wide range of content platforms around the world at massive scale, faced significant challenges in ensuring performance and stability across its data centers. With over a million servers running containerized applications, the company required a networking solution…
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The DevOps Engineer's Handbook
Rather than technology alone, it's the practices, processes, and culture changes DevOps introduces that can most positively impact your software delivery.
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Transparent SLIs: See Google Cloud the way your application experiences it
By Jay Judkowitz, Sr. Product Manager Like all good IT organizations, you religiously measure the performance and availability of your ser...
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Golang: Don't be afraid of makefiles
I’m using Golang for a while. During the development, I was used to repeatedly execute “go build”,“go test” manually. This was a bad habit on which I resign. It is not so painful if you use simple command without any args. But in case of more complex tasks, naturally, it is going to be a…
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Decreasing Certificate Lifetimes to 45 Days
Let’s Encrypt will be reducing the validity period of the certificates we issue. We currently issue certificates valid for 90 days, which will be cut in half to 45 days by 2028. This change is being made along with the rest of the industry, as required by the CA/Browser Forum Baseline Requirements, which set the…
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We Don’t Run Cron Jobs (2016)
We build our own (simple) cron-replacement and we are extremely happy with it.
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Rate limits on GitLab.com are changing
Starting October 19, GitLab.com rate limits will align with your subscription. Sign in to unlock higher limits. Premium/Ultimate changes arrive in January.
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Requests dropped when using Cloudflare’s free tier for a commercial project
Visits counter was a critical feature of every website just 20 years ago. In this tutorial, we will implement it with Rust Cloudflare Workers by adding persistence and dynamic behaviors to an otherwise static page. We will also discuss other practical use cases of CF workers edge proxy.
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Static web – back to the roots?
Exploring the shift back to static site generators to sanitize web development practices
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Securing Ubuntu
Table of Contents Initial Setup Setting up iptables and Fail2Ban Fail2Ban iptables rules Make shared memory read-only Setting up Bastille Linux Configuring Bastille sysctl hardening Setting up a chroot environment Securing nginx inside the chroot Extras Initial Setup Let’s login to our new machine and take some…
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Native ACME support comes to Nginx
NGINX and Let's Encrypt share a common vision of an open and secure web. Now, with built-in support for ACME, the world's most popular web server, reverse proxy and ingress controller for Kubernetes can simplify certificate management for everyone. From the home lab to scaled-out, mission-critical enterprise…
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Microsoft is failing to deliver emails that mention newclimate.org
Since 17 October, to our knowledge any email with the NewClimate URL (newclimate dot org) in the email body, link, signature, reply header or contained anywhere in an attachment is unjustifiably quarantined by Microsoft email servers without any notice, regardless of who sends or receives the email.
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How We Deliver Global SSL with Let's Encrypt
News, tips, and tricks from the team at Fly
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Terraform 0.7 released
We've released Terraform 0.7. Terraform is a tool for safely and efficiently building, combining, and launching infrastructure. Terraform continues to be HashiCorp's fastest growing project. Over the past year, we've released over 20 minor versions of Terraform expanding resource and provider coverage as well as…
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We spent two weeks hunting an NFS bug in the Linux kernel (2018)
Here's an in-depth recap of debugging a GitLab issue that culminated in a patch for the Linux kernel.
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Hitler Uses Docker, Annotated
If you haven’t seen it, this is a very accurate and smart Downfall satire on Docker’s ecosystem, technology, and culture. It’s so good that I thought it would be instructive to an…
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Preview: Amazon S3 Tables and Lakehouse in DuckDB
We are happy to announce a new preview feature that adds support for Apache Iceberg REST Catalogs, enabling DuckDB users to connect to Amazon S3 Tables and Amazon SageMaker Lakehouse with ease.
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How to Scale PostgreSQL on AWS: Learnings from Citus Cloud
Lessons learned in scaling out the PostgreSQL database in the cloud using Citus, an open source extension to Postgres that is also available as a fully-managed database as a service. From operational pain points like HA to disaster recovery to backups to monitoring and logging and alerts.
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Powering the Lunar Base
NASA’s selection of SpaceX’s Starship within the Human Lander System (HLS) program was both surprising and exciting for space nerds all over. Previously I have written about how Starshi…
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Uber migrates microservices to multi-cloud platform running Kubernetes and Mesos
Each and every week, Uber’s 4,500 stateless microservices are deployed more than 100,000 times by 4,000 engineers and many autonomous systems. These services are developed, deployed, and operated by hundreds of individual teams working independently across the globe. The services vary in size, shape, and…
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EC2 Dedicated Hosts
Last month, I announced that we would soon be making EC2 Dedicated Hosts available. As I wrote at the time, this model allows you to control the mapping of EC2 instances to the underlying physical servers. Dedicated Hosts allow you to: Bring Your Own Licenses – You can bring your existing server-based licenses for…