Open edX的生产环境性能和架构

github wiki有一篇文档说明了edx.org的架构https://github.com/edx/configuration/wiki/Hosting-edX-in-Production

edX.org 部署

EdX.org 通过AWS cloudformation部署在EC2。你可以看到cloudformation的摸板https://github.com/edx/configuration/blob/master/cloudformation_templates/edx-reference-architecture.json.

在2015-02-18的时候，部署大概是这样的:

几个名词：

ELB Elastic Load Balancing  http://aws.amazon.com/cn/elasticloadbalancing/

实例类型 http://aws.amazon.com/cn/ec2/instance-types/

EdXApp Servers (10 c3.4xlarge instances)

• edxapp.yml
• 1 external ELB hosting courses.edx.org

Forum Servers (2 m1.large instances)

• forum.yml
• 1 internal ELB hosting prod-edx-forum.edx.org

CommonCluster Servers (3 m3.large instances)

• commoncluster.yml
• 4 internal ELBs hosting
  • ElasticSearch
  • RabbitMQ
  • XQueue
  • XQueue internal

Worker Servers (2 m2.4xlarge instances)

• edxapp.yml

xqwatcher Servers (2 m3.medium instances)

• xqwatcher.yml

Insights Servers (2 m3.medium instances)

• insights.yml
• 1 ELB hosting insights.edx.org

Certificates Servers (1 m3.medium instance)

• certs.yml

MongoDB Hosted via Compose.io

• Can also be deployed using mongo.yml

MySQL Hosted via AWS RDS (Multi-AZ deployment of size db.m2.4xlarge)

• Can also be deployed using a cluster of any mysql compatible database server.

Misc

• Various legacy graders
• Analytics related servers
• Admin & Monitoring servers

可以看到的大概分割思路是这样的

• edXAPP，包含LMS/CMS
• 论坛
• 一般节点，包含rabbitMQ/Xqueue
• Worker，后端进程
• xqwatcher，外部分析
• Insight，数据分析
• Certs，证书组件
• MonogoDB节点
• Mysql节点
• 其他，如管理监控