AWS Systems Manager State Manager vs OpenDSC

AWS Systems Manager State Manager automates keeping managed nodes and other AWS resources in a state that customers define. Its associations specify the configuration to maintain, when to apply it and which resources to target. Targets can be selected by tags, AWS Resource Groups, individual node IDs or all managed nodes in the current Region and account. Associations can run immediately or later and accept most standard cron and rate expressions, but association cron expressions cannot specify months. On Linux, macOS and Windows Server managed nodes, State Manager can bootstrap software, schedule agent updates, configure network settings, join nodes to a Microsoft Active Directory domain and run scripts. Association run output can be stored in Amazon S3, and State Manager is supported as an event type and target type in Amazon EventBridge rules. It has no additional charge, although limits may apply. State Manager runs as a cloud service with an agent-based model. AWS Systems Manager follows a shared responsibility model: AWS protects cloud infrastructure, while customer responsibilities depend on the service, data and requirements. Third-party auditors assess Systems Manager under assurance programs including SOC, PCI, FedRAMP and HIPAA.

OpenDSC is a configuration management platform for Microsoft Desired State Configuration, intended for teams managing settings across infrastructure nodes. Its Local Configuration Manager monitors system state and can automatically correct configuration drift. For centralized management, the pull server registers nodes, distributes configurations, and provides compliance reporting through a web dashboard and REST API. Configurations can be versioned, assembled into composite deployments, and parameterized by region, environment, or node. Local file-based configurations support disconnected use as well as server-driven pulls. The resource library covers Windows administration, SQL Server, and file, JSON, XML, and archive tasks across Windows, Linux, and macOS. The Resource Development Kit provides .NET libraries and tools for developing custom resources. The pull server supports OpenID Connect providers, client-certificate mutual TLS, role-based access control, and retention policies. SQLite is supported for development, while production deployments can use SQL Server or PostgreSQL. The project is MIT licensed and self-hosted. Its roadmap lists native Linux and macOS LCM services, distribution packages, and official Docker deployment as planned work.