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openstack component

Posted on 2015-07-15 13:13  bw_0927  阅读(90)  评论(0)    收藏  举报

nova-compute service

A worker daemon that creates and terminates virtual machine instances through hypervisor APIs. For example:

  • XenAPI for XenServer/XCP

  • libvirt for KVM or QEMU

  • VMwareAPI for VMware

Processing is fairly complex. Basically, the daemon accepts actions from the queue and performs a series of system commands such as launching a KVM instance and updating its state in the database.

 

The queue

A central hub for passing messages between daemons. Usually implemented with RabbitMQ, but can be implemented with an AMQP message queue, such as Apache Qpid or Zero MQ.