today's leftovers
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Blog: Building a Kubernetes Edge (Ingress) Control Plane for Envoy v2
Kubernetes has become the de facto runtime for container-based microservice applications, but this orchestration framework alone does not provide all of the infrastructure necessary for running a distributed system. Microservices typically communicate through Layer 7 protocols such as HTTP, gRPC, or WebSockets, and therefore having the ability to make routing decisions, manipulate protocol metadata, and observe at this layer is vital. However, traditional load balancers and edge proxies have predominantly focused on L3/4 traffic. This is where the Envoy Proxy comes into play.
Envoy proxy was designed as a universal data plane from the ground-up by the Lyft Engineering team for today’s distributed, L7-centric world, with broad support for L7 protocols, a real-time API for managing its configuration, first-class observability, and high performance within a small memory footprint. However, Envoy’s vast feature set and flexibility of operation also makes its configuration highly complicated – this is evident from looking at its rich but verbose control plane syntax.
With the open source Ambassador API Gateway, we wanted to tackle the challenge of creating a new control plane that focuses on the use case of deploying Envoy as an forward-facing edge proxy within a Kubernetes cluster, in a way that is idiomatic to Kubernetes operators. In this article, we’ll walk through two major iterations of the Ambassador design, and how we integrated Ambassador with Kubernetes.
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RIP Dr Peuto, Zilog and Sun's bright SPARC
The 16-bit Z8000 was the big brother of the 8-bit Z80, used in the first wave of low cost microcomputers like the Spectrum and TRS80, but had a starring role in its own right. As a 16-bit CPU it powered several Unix systems, including Commodore, Olivetti and Onyx, as well as Zilog's own System 8000 machines.
Astonishingly, the ambitious project began in early 1976, long before the personal workstation was a market.
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Reading the Output of a Weather Station Using Software Defined Radio
A while back, Dave ordered a weather station. His research pointed to the Ambient Weather WS-2000 as the best bang for the buck as far as accuracy (after it's calibrated, which is a time consuming and exacting process that I suspect most weather station owners don't bother with). It comes with a "console", a little 7" display that sits indoors and reads the radio signal from the outside station as well as a second thermometer inside, then displays all the current weather data. It also uses wi-fi to report the data upstream to Ambient and, optionally, to a weather site such as Wunderground. (Which we did for a while, but now Wunderground is closing off their public API, so why give them data if they're not going to make it easy to share it?)
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Tiny module runs Linux on i.MX8M Mini
F&S unveiled a 40 x 35mm “PicoCore MX8MM” module that runs Linux on an up to quad-A53, 1.8GHz i.MX8 Mini with up to 8GB LPDDR4 and 32GB eMMC plus WiFi/BT, a GbE controller, PCIe, and optional -40 to 85°C support.
F&S Elektronik Systeme pre-announced a tiny PicoCore MX8MM compute module featuring NXP’s new i.MX8 Mini — an i.MX8M variant with lower video resolution, but a faster clock rate. In September, Variscite announced a slightly larger (55 x 30mm) DART-MX8M-Mini COM with the Mini SoC, and Boundary Devices recently revealed details on a Nitrogen8M-Mini SBC. None of these boards appear to have shipped in volume.
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digiKam 7.7.0 is releasedAfter three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. |
Dilution and Misuse of the "Linux" Brand
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