Apache CloudStack 4.1.0 发布了，CloudStack是一个开源云计算解决方案。可以加速高伸缩性的公共和私有云（IaaS）的部署、管理、配置。使用CloudStack作为基础，数据中心操作者可以快速方便的通过现存基础架构创建云服务。
该版本改进内容包括：
* An API discovery service that allows an end point to list its supported APIs and their details.
* Added an Events Framework to CloudStack to provide an "event bus" with publish, subscribe, and unsubscribe semantics. Includes a RabbitMQ plugin that can interact with AMQP servers. Introduces the notion of a state change event.
* Implement L3 router functionality in the Nicira NVP plugin, and including support for KVM (previously Xen-only).
* API request throttling to prevent attacks via frequent API requests.
* AWS-style regions.
* Egress firewall rules for guest networks.
* 更改 root 和 数据卷大小
* 重置 SSH 密钥用于访问 VMs
* 支持 EC2 Query API.
* Autoscaling support in conjunction with load balancing devices such as NetScaler.
项目主页：http://cloudstack.apache.org/
来自:开源中国社区
