Harbor is an open source registry for container images and Helm charts developed by VMware and hosted by the CNCF. Hosting Harbor within your infrastructure provides several advantages over using a default Docker registry, including role-based access control, security scanning, and replication of resources between instances. Monitoring Harbor's disk usage is crucial to ensure that it has sufficient storage capacity. Datadog's integration with Harbor allows for tracking health and performance alongside containerized applications and infrastructure, providing real-time monitoring and notification capabilities. Additionally, the integration offers features such as forecasting algorithms to visualize projected disk usage, service checks for API availability, automatic health check tracking, log analysis, and alerting for component failures. This enables users to ensure uptime for their self-hosted registry and monitor all containerized services in one place.