openstack删除一个实例的流程及操作

从dashboard页面上terminate instance

1.删除配置文件

/etc/libvirt/qemu/instance-0000000*.xml

2.删除响应的文件目录

/var/lib/nova/instances/instance-0000000*

3.

修改数据库

1）instance表中修改deleted_at，deleted，vm_state,terminated_at字段。没有修改手工操作中power_state,root_device_name,task_state 三个字段。

手工操作如下：

update instances set

deleted_at = updated_at,

deleted = 1,

power_state = 0,

vm_state = "deleted",

terminated_at = updated_at,

root_device_name = NULL,

task_state = NULL

where id = 9;

2）virtual_interfaces 表中响应的instanceid的记录删除。手工操作如下：

delete from virtual_interfaces where instance_id=9;

3） instance_info_caches 表中修改deleted_at 和deleted字段。 手工操作如下

update instance_info_caches set

deleted_at = updated_at,

deleted = 1

where instaceid = 9;

4)fixed_ips 表中修改instance_id，allocated，virtual_interface_id ,leased字段。手工操作如下

update fixed_ips set

instance_id = NULL,

allocated = 0,

leased= 0,

virtual_interface_id = NULL

where instanceid = 9;

注意：

创建一个instance时fixed_ip表的变化

fixed_ips 表中修改instance_id，allocated，virtual_interface_id 字段。instance_id

allocated=1

leased=1

virtual_interface_id=select id from virtual_interfaces where instance_id=9

手工操作如下

update fixed_ips set

instance_id = instanceid,

allocated = 1,

leased = 1,

virtual_interface_id = select id from virtual_interfaces where instance_id=9

where id = 9;

5）security_group_instance_association表中deleted_at deleted两个字段

注意：

创建一个instance时security_group_instance_association表的变化

insert into `nova`.`security_group_instance_association`

(`created_at`,

`deleted`,

`id`,

`security_group_id`,

`instance_id`)

values ('created_at',

'0',

'id',

'1',

'9');`