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OpenStack Congress

OpenStack Congress is a governance and policy-as-a-service (cloud governance) component in the OpenStack ecosystem that enables declarative, cloud-wide policy enforcement across diverse cloud services.

  • Policy-as-a-service for OpenStack clouds (cloud governance)
  • Centralized definition and enforcement of compliance, security, and operational policies across services (policy management)
  • Integration with other OpenStack services such as compute, networking, and storage to consume and act on their data (cloud orchestration)
  • Declarative policy language for expressing rules over cloud state and events (policy engine)
  • Extensible architecture for plugging in data sources and enforcing actions across different back-end systems (integration framework)

More About OpenStack Congress

OpenStack Congress is an OpenStack project that provides policy-as-a-service (cloud governance) for OpenStack-based environments. Its purpose is to allow operators and application teams to declare high-level business, security, and compliance policies and have those policies evaluated automatically against data collected from various cloud services. Congress focuses on governance across the cloud control plane rather than on low-level enforcement inside individual services.

The project introduces a centralized policy engine (policy management) that ingests data from multiple OpenStack services and related systems, such as compute, networking, identity, and storage components. Congress models this data in a uniform way so that policies can be written once and applied across heterogeneous resources. Policies are typically written in a declarative, logic-based language that expresses constraints and conditions over the combined cloud state, such as placement rules, network segmentation requirements, or image usage constraints.

Congress operates by evaluating policies against incoming data streams and snapshots from its data sources (cloud observability). When it detects that a policy is violated or about to be violated, it can trigger actions through configured drivers, such as blocking a request, sending a notification, or invoking external automation tools. This pattern allows enterprises to encode governance requirements centrally and rely on Congress to detect and handle violations as part of routine operations.

In enterprise deployments, Congress is used to support regulatory compliance, multi-tenant isolation rules, and operational standards in OpenStack clouds (compliance management). Cloud operators can capture organizational rules about which projects may use which flavors, networks, or images, or ensure that workloads meet tagging and placement policies. By integrating with other OpenStack services through well-defined APIs and data source drivers (cloud integration), Congress provides a cross-service view that typical per-service configuration cannot supply.

From an architectural perspective, Congress runs as an independent OpenStack service with its own Application Programming Interface (API) (cloud service). It exposes endpoints that allow clients to manage policy tables, submit policy rules, and query the evaluated results. Data source drivers collect information from services such as Nova, Neutron, Keystone, Glance, and others, populating Congress with the current operational state. Enforcement drivers can connect Congress to external systems that carry out remediation actions, creating a feedback loop between policy evaluation and operational control.

Within an enterprise technology taxonomy, OpenStack Congress fits into cloud governance, policy management, and compliance automation categories. It provides a framework for expressing and enforcing cloud-wide policy, complements OpenStack’s core infrastructure services, and offers an integration point for higher-level orchestration, configuration management, and security tools that need a consistent policy layer over OpenStack environments.