A rules engine for cloud security, cost optimization, and governance using YAML policies to query, filter, and act on cloud resources.
Cloud Custodian (c7n) is an open-source rules engine for cloud security, cost optimization, and governance. It allows users to define YAML-based policies to query, filter, and take actions on cloud resources across AWS, Azure, and GCP, helping organizations maintain compliance and reduce waste.
Cloud engineers, DevOps teams, and security professionals managing multi-cloud environments who need automated policy enforcement for security, cost, and governance.
Developers choose Cloud Custodian for its unified multi-cloud approach, declarative YAML policy language, and serverless automation capabilities that replace custom scripts with a scalable, battle-tested framework.
Rules engine for cloud security, cost optimization, and governance, DSL in yaml for policies to query, filter, and take actions on resources
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Supports AWS, Azure, and GCP with a unified YAML policy framework, eliminating the need for separate scripts per cloud provider as highlighted in the multi-cloud support feature.
Automatically provisions cloud-native functions (e.g., AWS CloudWatchEvents, Azure EventGrid) for real-time policy execution, enabling scalable enforcement without manual infrastructure management.
Offers nested boolean conditions and a comprehensive set of filters to precisely target resources, demonstrated in sample policies like tag-compliance with complex logic.
Integrates with infrastructure as code tools like Terraform via the ShiftLeft tool to provide early feedback in CI pipelines, reducing deployment risks from misconfigurations.
Requires significant configuration for authentication, roles, and event sources across clouds, as seen in the detailed Docker run commands and provider-specific setup guides.
Writing effective policies demands deep knowledge of cloud resource schemas and YAML syntax, which can be non-intuitive and error-prone for new users without extensive documentation study.
Relies solely on CLI and external tools for management, making it less accessible for real-time monitoring or non-technical stakeholders compared to GUI-based solutions like cloud provider dashboards.