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Cloud Custodian is an open-source tool that manages cloud resources by filtering, tagging, and applying actions via a YAML DSL to enforce security and cost controls. It supports AWS, Azure, and GCP (with beta for Kubernetes, Tencent Cloud, and OpenStack) and can enforce policies in real time by integrating with cloud control planes, with unified metrics and reporting. It offers governance features like off-hours cost management, unused resource cleanup, Terraform integration for governance-as-code, and flexible deployment options (local, serverless, or on a VM), under Apache 2.0 as a CNCF-incubating project.
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Cloud Custodian: An open-source rules engine (backed by CNCF) used heavily by enterprises.
Cloud Custodian : An open-source rules engine maintained as a CNCF project.