Overview If you are interested in getting started to contribute to the Envoy proxy open-source project, please read on. We will use Docker Desktop for Windows and Visual Studio Code Dev Container to setup local development environment. Prerequisites Docker Desktop for Windows >60GB free disk space Visual Studio Code Docker Desktop If you don’t…

Overview In this blog post, I will demonstrate the Rego walk built-in function. The function’s signature is ‘walk(x, output)'. It generates [path, value] tuples for all nested documents of x (recursively). Sample Code The sample code is published to Rego Playground. The Rego Playground When enabled, the Rego compiler has an expanded set of constraints, which will be treated as errors when violated. E.g…play.openpolicyagent.org

Overview Kubernetes Gateway API includes a set of conformance tests. These create a series of Gateways and Routes with the specified GatewayClass, and test that the implementation matches the API specification. Envoy gateway is the implementation of Kubernetes Gateway API specification with some Envoy-specific extensions. This blog post demonstrates building and…

Overview In the last blog post, we discussed adding external data to OPA. We mentioned that there is only one ‘data.json’ file in the OPA bundle. However, what if you need multiple JSON data files during the development phase? In this blog post, we will demonstrate how to handle multiple JSON…

Overview This is my learning notes on Rego ‘some’ and ‘=’ keywords. Unification (‘=’) is not easy to read. OPA recommends using assignment (:=) and comparison (==) whenever possible. https://www.openpolicyagent.org/docs/latest/policy-language/#equality-assignment-comparison-and-unification ‘some’ Keyword and Variable Operands Overview You need ‘some’ in rules that contains references with variable operands.

Overview In this blog post, I will demonstrate a sample provisioning of Envoy Gateway API resources, which includes multiple TLSRoutes. If you are interested in contributing to Envoy Gateway open-source project, and want to learn more about setting up the resources for testing, please read on. Deploy Envoy Gateway #create envoy gateway nino@DESKTOP-TMK1GG5:~$ helm install…

Overview Envoy gateway open source project aims to provide a simplified API for the gateway use case. The API is the Kubernetes Gateway API with some Envoy-specific extensions. Here is the Kubernetes gateway API architecture.

Overview In this blog post, I will demonstrate how to expose a Golang GraphQL API through an Envoy proxy and how to execute GraphQL queries from an Angular Apollo client. Coding Structure Here is a screenshot of the coding structure: the ‘api’ directory contains Go GraphQL code, the ‘client’ directory contains Angular…

Overview In this blog post, we will use a quick and easy example to show how to get started in contributing to an open-source project. Selecting a Project There are many open-source projects on GitHub, and you may select any project that you are interested in. For this blog post, I will use https://github.com/graphql/graphiql…