Here is a quick introduction to Open Policy Agent (OPA), which is now a Cloud Native Computing Foundation incubating project, and which provides an open source, general-purpose policy engine for cloud infrastructure.
The cloud-native stack is becoming so complex and distributed that a common, application autorization mechanism is necessary.
In this video, Bill Mann, CEO of Styra, talks about how OPA is gaining momentum as the de facto approach for establishing authorization policies across cloud native environments. Styra pioneered OPA. Its founding team of Tim Hinrichs and Teemu Koponen previously played key roles in the development of software-defined networking and network virtualization at Nicira.