删除openstack中的僵尸实例

问题场景：

删除openstack中的僵尸实例

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解决方案：

第一步：计算节点上关闭实例

virsh destroy instance-0000045a
virsh undefine instance-0000045a

第二步：删除nova数据库中记录

SET @bianliang:='instance-uuid';
delete from security_group_instance_association where instance_uuid=@bianliang;  
delete from instance_info_caches where instance_uuid=@bianliang;  
delete from block_device_mapping where instance_uuid=@bianliang; 
delete from instance_actions_events where action_id in (select id from instance_actions where instance_uuid=@bianliang);
delete from instance_actions where instance_uuid=@bianliang; 
delete from instance_faults where instance_uuid=@bianliang;  
delete from instance_extra where instance_uuid=@bianliang;
delete from instance_system_metadata where instance_uuid=@bianliang;
delete from instance_id_mappings where uuid =@bianliang;
delete from virtual_interfaces where instance_uuid=@bianliang; 
delete from instances where uuid=@bianliang; 

第三步：删除placement数据库中的记录

placement是负责调度的服务，库中记录了计算节点上云实例的信息，如果不删除这里面的实例记录，会影响资源的调度（即使机器上没有实例，而且dashboard上显示有资源的时候，调度到机器上还是会失败）

SET @bianliang:='instance-uuid';
delete from allocations where sonsumer_id=@bianliang;

我的openstack版本是T版，其他的版本可能表啥的有点区别。