On a fateful Friday evening on December 2019, when a few of us were looking forward to packing their bags and going home, we got an alert from the internal monitoring tool that the system has started throwing unusually high numbers of 5xx errors.

У вас есть свежее распределенное хранилище. Кластер уже установлен и готов к вводу в продакшен. Самое время протестировать производительность. Такое тестирование проводится чтобы понять скорость работы хранилки на практике, оценить адекватность инсталляции и понять её максимальную производительности на старте. В этой статье я поделюсь методологией препродакшен тестирования.

Dell’s PowerEdge R7525
CPU: 2x AMD EPYC 7542 - Total 64 cores / 128 threads
Memory: 2TB 3200MT/s
Storage: 24x 6.4TB Intel P4610, NVMe SSD, 3200/3200 MB/s read/write

Chisel is a fast TCP/UDP tunnel, transported over HTTP, secured via SSH. Single executable including both client and server. Written in Go (golang). Chisel is mainly useful for passing through firewalls, though it can also be used to provide a secure endpoint into your network.

Sometimes it can take years to make a single-line code change.

Please is a cross-language build system with an emphasis on high performance, extensibility and reproducibility. It supports a number of popular languages and can automate nearly any aspect of your build process.

Since v3.0.0, KubeSphere changes the ansible-based installer to the new installer called KubeKey that is developed in Go language. With KubeKey, you can install Kubernetes and KubeSphere separately or as a whole easily, efficiently and flexibly.

Summary and key takeaways

- Two root certification authorities expired on May 30, 2020.
- Some of our customers experienced service outages for up to 1.5 hours (if they had outdated OpenSSL libraries), and others up to 3 hours (if they also had outdated certificate stores).
- The issue has been fully mitigated, and the service availability was restored for everyone. Although related to OpenSSL, HTTPS and PKI certificates, this was not a security incident.

A few people I follow on twitter mentioned they’d contributed to 97 Things Every SRE Should Know. It’s a book full of short, 1-3 page chapters, focused on topics dear to an SREs heart. So i had no choice but to buy it. In an attempt to be more deliberate with my reading and what I’ve retained from the book I’ve decided to create some reading notes for future me. This post is broken down into a section per chapter.

Scaleway has begun to offer cloud-based Apple Silicon-based Mac Minis.

Learn how to write Golang unit tests for your Helm charts to keep quality high and make changes with confidence.

Altair is a beautiful feature-rich GraphQL Client IDE for all platforms.