Openstack调整实例大小_冷迁移

有时虚拟机创建后发现虚拟机规格太小，满足不了业务需求。于是需要在线拉伸虚拟机的规格。

1、用admin用户登录dashboard，创建满足需求的虚拟机规格

2、输入适当的参数

3、修改controller和各个computer节点的nova.cnf文件，打开下面两个参数

1
2

allow_resize_to_same_host=True 
scheduler_default_filters=RetryFilter,AvailabilityZoneFilter,RamFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter

4、重启控制节点nova服务

# systemctl restart openstack-nova-api.service openstack-nova-conductor.service openstack-nova-scheduler.service openstack-nova-cert.service openstack-nova-consoleauth.service openstack-nova-compute.service openstack-nova-novncproxy.service

5、重启计算节点nova服务

1	# service openstack-nova-compute restart

参考资料：
http://www.cnblogs.com/goodcook/p/6509808.html