查询虚拟机信息

概述

StratoVirt可以查询虚拟机状态、vCPU拓扑信息、vCPU上线情况等。由于StratoVirt使用QMP管理虚拟机，所以查询虚拟机信息，也需要先连接到虚拟机。

查询状态

使用query-status命令查询虚拟机的运行状态。

• 用法：

  { "execute": "query-status" }

• 示例：

<- { "execute": "query-status" }
-> { "return": { "running": true,"singlestep": false,"status": "running" } 

查询拓扑

使用query-cpus命令查询所有CPU的拓扑结构。

• 用法：

{ "execute": "query-cpus" }

• 示例：

<- { "execute": "query-cpus" }
-> {"return":[{"CPU":0,"arch":"x86","current":true,"halted":false,"props":{"core-id":0,"socket-id":0,"thread-id":0},"qom_path":"/machine/unattached/device[0]","thread_id":8439},{"CPU":1,"arch":"x86","current":true,"halted":false,"props":{"core-id":0,"socket-id":1,"thread-id":0},"qom_path":"/machine/unattached/device[1]","thread_id":8440}]}

查询vCPU上线情况

使用query-hotpluggable-cpus命令查询所有vCPU的online/offline情况。

• 用法：

{ "execute": "query-hotpluggable-cpus" }

• 示例：

<- { "execute": "query-hotpluggable-cpus" }
-> {"return":[{"props":{"core-id":0,"socket-id":0,"thread-id":0},"qom-path":"/machine/unattached/device[0]","type":"host-x86-cpu","vcpus-count":1},{"props":{"core-id":0,"socket-id":1,"thread-id":0},"qom-path":"/machine/unattached/device[1]","type":"host-x86-cpu","vcpus-count":1}]}

其中，online的vCPU具有qom-path项，offline的vCPU则没有。