Rally 简介
Rally 集成了部署、API测试、压力测试功能(如下图)，但我们一般用 devstack 部署，tempest 做 API 测试，因此 Rally 常用于模拟高并发场景的压力测试。Rally 测试 openstack 在并发下 API 的相应时间和请求成功率，从而测试出 openstack 规模和性能。
1. Deploy Rally
$ ./rally/install_rally.sh -v
#使用 virtualenv 安装 Rally
2. Configure Rally
$ source /opt/rally/bin/activate
$ rally deployment create --filename=existing.json
--name=openstack # 初始化 Rally，把所需测试 openstack 集群的 keystone url，用户租户信息写入到 existing.json 中
$ rally deployment check # 查看集群的 service
$ rally deployment check # 查看集群的 service
(rally)[root@controller
~]# rally deployment checkkeystone endpoints
are valid and following services are available:+------------+----------------+-----------+| services | type |
status |+------------+----------------+-----------+| ceilometer | metering
| Available || cinder | volume
| Available || cinderv2 | volumev2
| Available || ec2 | ec2
| Available || glance | image
| Available || heat | cloudformation
| Available || heat | orchestration
| Available || keystone | identity
| Available || neutron | network
| Available || nova | compute
| Available || novav3 | computev3
| Available || s3 | s3
| Available || trove | database
| Available |+------------+----------------+-----------+ |
3. Benchmark Openstack Peformance
rally/doc/samples/tasks/scenarios/ 包含各个组件的配置文件，直接使用即可，举例：
1）测试 keystone 创建-删除用户性能
$ rally -v task start rally/doc/samples/tasks/scenarios/keystone/create-and-delete-user.json
Result:
2）测试 nova 创建-删除虚拟机性能
$ rally -v task start rally/doc/samples/tasks/scenarios/nova/boot-and-delete.json
Result:
4. Refference
https://wiki.openstack.org/wiki/Rally
http://prajnagarden.com/openstack/2014/05/06/rally-guide-01/