DevOpsLinks

Amazon ECS now ensures software version consistency by resolving container image tags to immutable digests for each deployment. This change eliminates the risk of inconsistent container versions, enhancing security and reliability in ECS services.

Netflix Architecture enables seamless content delivery to over 200 million subscribers globally through scalable and resilient infrastructure. It efficiently supports massive concurrent streaming, revolutionizing media consumption with cutting-edge technology.

Grafana dashboards have been key in visualizing data for over a decade, incorporating principles like audience understanding and visual hierarchies for effective design. Key metrics to consider include the RED method (Errors, Requests, Duration), the USE method (Utilization, Saturation, Errors), and the Four Golden Signals (Latency, Traffic, Errors, Saturation) for comprehensive monitoring.

Attackers in the Dero Cryptojacking operation targeted clusters allowing anonymous access to the Kubernetes API. Anonymous access is controlled by a flag on the kube-apiserver component and most major distributions enable it by default, providing limited access. Disabling anonymous access or removing RBAC rules that allow actions by anonymous users can mitigate security risks.

High latency in distributed systems can render applications unusable, as frustrating as complete outages. Caching, CDNs, and load balancing are crucial strategies to reduce latency and improve performance. Techniques like asynchronous processing, optimal indexing, data compression, pre-caching, and TCP connection reuse are essential to enhance system responsiveness and reduce delays.

Without prioritized load-shedding, both user-initiated and prefetch availability drop under latency spikes, but with it, user-initiated requests maintain 100% availability while only prefetch requests are throttled. During an infrastructure outage, prioritized load-shedding kept user-initiated requests’ availability above 99.4% despite a 12x spike in prefetch requests. Netflix has created an internal library enabling services to perform prioritized load shedding based on CPU utilization and predefined priority buckets, ensuring consistent user experience during load spikes.

gRPC, a high-performance RPC framework, excels with wide language support but introduces complexity in simple RPC calls and tooling due to required code generation. HTTP/2 reliance limited initial reach, while HTTP/3 adoption and JSON mapping lagged behind. Despite these issues, current improvements like HTTP/3 support and Buf CLI enhancements are addressing these shortcomings.

Terminal command editing varies widely: some programs lack arrow key support, while others use the GNU Readline library for navigation and history. Readline keybindings, derived from Emacs, offer features like command history search and line navigation. Custom input systems in shells like Fish or tools like IPython often extend or differ from Readline but aim to provide a seamless experience.

Rich is a Python library for rich text and beautiful formatting in the terminal.

A terminal workspace with batteries included

Application Delivery as Code that Runs Anywhere

A GitHub Actions Supply Chain CTF / Goat

The next generation Package Manager for Kubernetes. Featuring a GUI and a CLI. Glasskube packages are dependency aware, GitOps ready and can get automatic updates via a central public package repository.