Mistake that cost thousands (Kubernetes, GKE)
No exaggeration, unfortunately. As a disclaimer, I will add that this is a really stupid mistake and shows my lack of experience managing auto-scaling deployments. However, it all started with a question with no answer and I feel obliged to share my learnings to help others avoid similar pitfalls. What is the difference between a Kubernetes cluster using 100x n1-standard-1 (1 vCPU) VMs VS having 1
CURRYFINGER - SNI & Host header spoofing utility - DUALUSE
Unix philosophy your way to finding the real host behind the CDN. Travis dropped Tue, Sep 10, 2019 CURRYFINGER measures a vanilla request for a particular URL against requests directed to specific IP addresses with forced TLS SNI and HTTP Host headers. The tool takes a string edit distance, and emits matches according to a rough similarity metric threshold. There are many guides that explain the p
Details of the Cloudflare outage on July 2, 2019
Details of the Cloudflare outage on July 2, 20192019-07-12 Almost nine years ago, Cloudflare was a tiny company and I was a customer not an employee. Cloudflare had launched a month earlier and one day alerting told me that my little site, jgc.org, didn’t seem to have working DNS any more. Cloudflare had pushed out a change to its use of Protocol Buffers and it had broken DNS. I wrote to Matthew P
Startup idea checklist
I now write regularly at www.spakhm.com. Everything new is there! I’ve been tinkering with different startup ideas and needed a good checklist to think through them. There are great templates for this already: The YC application, Amazon’s internal press release, and Sequoia’s Writing a Business Plan. I found myself mixing and tweaking these templates because they don’t exactly match my model of th
Very Good Security Add-on: Collect Data Securely
Security is at the forefront of most software companies these days. With stories of high profile data breaches becoming regular occurrences, it’s no wonder. But how can we as developers protect ourselves from security vulnerabilities? What if our application needs to process payments, collect sensitive user data such as medical records, social security numbers, etc.? How can we lower our risk and
Static web - back to the roots?
Exploring the shift back to static site generators to sanitize web development practices May 24, 2019 This article goes back to the early years of the web to understand why dynamic websites are so prevalent today. Then, we consider what static websites bring in terms of performance, editing speed, and organic results. At first, the web was static. The early days Internet was a place for tinkerers.
Turn Your Excel File Into a Web Application
application · Mar 12, 2020 Turn Your Excel File Into a Web Application A Typical Workflow Run by Excel The other day a young lady in the administration department looked busy so I asked her what she was up to. She said that she has to visit several websites to check the currency rate, put them down in Excel and send it to her boss. The boss will then tell her to buy a certain currency at a certain
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