To improve hardware utilization and save manpower in system maintenance, most of the web
services in IHEP have been migrated to a private cloud build upon OpenStack. However, cyber security attacks
becomes a serious threats to the cloud progressively. Therefore, a cyber security detection and monitoring system is deployed for this cloud platform. This system collects various security related logs as data sources, and processes them in a framework composed of open source data store, analysis and visualization tools. With this system, security
incidents and events can be handled in time and rapid response can be taken to protect cloud platform against cyber
security threats.