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Approach 1:

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Go Application Integration with

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OPA

Develop a Go application )The goal of this proposal is to develop a Java sidecar component that seamlessly integrates with Open Policy Agent (OPA) to enhance policy-based control and decision-making in distributed systems. This integration will enable applications to enforce dynamic and fine-grained policies, improving security, compliance, and overall system reliability.

The proposed Java sidecar will be designed to:

- Establish a secure and efficient communication channel with OPA using HTTP REST APIs or other appropriate protocols.

- Implement logic for sending policy queries to OPA and receiving policy decisions.

- Provide a simple and intuitive interface for Java applications to define and enforce policies.

- Facilitate the translation of Java application context into OPA-compatible data for policy evaluation.

- Implement mechanisms to dynamically update policies from OPA.

- Integrate with popular logging and monitoring tools to capture and analyse policy events.

- Provide metrics and instrumentation for tracking the performance and health of the integration.

- Implement secure communication practices to protect the confidentiality and integrity of data exchanged with OPA.

- Adhere to best practices for handling sensitive information, such as API tokens or credentials.

The proposed Java sidecar will be developed using standard Java libraries and frameworks, with consideration for ease of use and minimal impact on existing applications. It will be designed to support Java applications running in various environments, including cloud-native architectures.

Approach 2: PDP with OPA lib

Proposal: Go Application with OPA Rego Library for Policy Enforcement

The aim of this proposal is to develop a Go application that leverages the Open Policy Agent (OPA) Rego library for efficient and flexible policy enforcement within the Policy Framework.

The proposed Go application will be designed to:

- Utilize the OPA Rego library to integrate OPA seamlessly into the Go application.

- Establish a secure and efficient communication channel with OPA.

- Develop a simple and intuitive mechanism for defining policies using Rego within the Go application.

- Facilitate the dynamic loading of policies to allow for real-time updates.

- Implement logic for evaluating policies using the OPA Rego engine.

- Provide a clear and detailed reporting mechanism for policy violations.

- Design interfaces and APIs that enable easy integration with existing Go applications.

- Ensure minimal impact on application performance.

- Implement logging and monitoring mechanisms to capture policy enforcement events.

- Provide metrics and instrumentation for tracking the performance and health of policy evaluations.

The proposed Go application will be developed using standard Go libraries, with a focus on simplicity, modularity, and compatibility with various deployment environments, including containerized and cloud-native architectures.

, leveraging the OPA Rego language, and incorporates Kafka for event-driven communication.

• • Use the OPA Go SDK to integrate OPA into the Go application.

  • Establish a secure communication channel between the Go application and OPA.

  • Develop a clear and concise mechanism for defining policies using the OPA Rego language within the Go application.

  • Implement logic for evaluating policies using the OPA Rego engine.

  • Enable the Go application to dynamically load and update policies from OPA for real-time adjustments.

  • Implement Kafka producers to publish policy-related events when policy decisions are made.

  • Implement Kafka consumers to listen for policy-related events and trigger appropriate actions.

Approach 2: Java Sidecar Integration with OPA

Develop a Java sidecar to seamlessly integrate with Open Policy Agent (OPA) for dynamic policy enforcement within Java-based applications.

• • Utilize HTTP REST APIs for secure communication with OPA.

  • Implement Java HTTP clients to send policy queries and receive decisions from OPA.

  • Design a Java API for defining and enforcing policies.

  • Implement a mechanism for dynamically updating policies from OPA.

  • Integrate with Kafka for asynchronous communication with other components of the PF.

  • Implement Kafka producers or consumers for policy-related events.

Conclusion: Both approaches involve integrating OPA for policy enforcement, with the first approach additionally incorporating Kafka for event-driven communication. The choice between a Java sidecar and a Go application is yet to be decidedThis proposal outlines a plan for creating a Go application that utilizes the OPA Rego library for efficient and flexible policy enforcement. The successful implementation of this project will empower us to enforce policies declaratively within our Go applications, contributing to improved security, compliance, and operational control.

Notes/Considerations from the policy weekly discussion:

Re-implement the PAP interaction with PDPs?

Convert ONAP policies to be OPA compatible? 

Convert OPA policies to be ONAP compatible?

Others?