1、Apache 之VCL介绍
VCL stands for Virtual Computing Lab. It is a free & open-source cloud computing platform with the primary goal of delivering dedicated, custom compute environments to users.
Apache VCL 是一个自服务的系统，为最终用户提供专用计算环境的远程访问环境。典型的使用场景是数据中心，也可以是物理刀片服务器、传统机架服务器或者虚拟机。VCL 也可以提供独立机器的代理访问。
而 VCL 的目的就是让用户通过 Web 界面来有限时间的使用这些计算资源。通过调度 API 可用于自动化管理服务器集群和 HPC 集群。
The compute environments can range from something as simple as a virtual machine running productivity software to a cluster of powerful physical servers running complex HPC simulations.
VCL supports provisioning several different types of compute resources including physical bare-metal machines, virtual machines hosted on several different hypervisors, and traditional computing lab computers you would normally find on a university campus.
2、architecture
The VCL architecture consists of 4 main components:
Web Portal
Database
Management Node
Compute Nodes (physical servers, virtual machines, traditional computing lab machines, cloud compute resources)
