OpenStack：以原始磁盘格式启动实例

Question

我的 OpenStack 有点头疼。我想做的是创建磁盘为 RAW 格式而不是默认 qcow 的实例。

我试图从中创建实例的磁盘映像也是原始格式。我通过以下方式创建了图像：

openstack image create --public --disk-format raw --container-format bare --file CentOS-7-x86_64-GenericCloud-1710.raw CentOS_7_raw

但是当我从它启动实例时，我看到磁盘已转换为 Qcow2(v3) 格式。

是否有可能运行具有原始格式磁盘的实例？

Answer 1

上传图片一目了然：

# openstack image create --public --disk-format raw --container-format bare --file CentOS-7-x86_64-GenericCloud-1710.raw CentOS_7_raw
+------------------+------------------------------------------------------+
| Field            | Value                                                |
+------------------+------------------------------------------------------+
| checksum         | 9d9cf225d36976b25eba247cb5f85d89                     |
| container_format | bare                                                 |
| created_at       | 2017-11-13T20:27:39Z                                 |
| disk_format      | raw                                                  |
| file             | /v2/images/8a18ee68-1d9e-4a2a-8277-ff29035d7011/file |
| id               | 8a18ee68-1d9e-4a2a-8277-ff29035d7011                 |
| min_disk         | 0                                                    |
| min_ram          | 0                                                    |
| name             | CentOS_7_raw                                         |
| owner            | 253f0c717bba45f8adf5c530b7194069                     |
| protected        | False                                                |
| schema           | /v2/schemas/image                                    |
| size             | 8589934592                                           |
| status           | active                                               |
| tags             |                                                      |
| updated_at       | 2017-11-13T20:28:01Z                                 |
| virtual_size     | None                                                 |
| visibility       | public                                               |
+------------------+------------------------------------------------------+

改变/etc/nova/nova.conf。将 images_type 参数更新为 raw:

# VM Images format. If default is specified, then use_cow_images flag is used
# instead of this one. (string value)
# Allowed values: raw, qcow2, lvm, rbd, ploop, default
#images_type=default
images_type=raw

重启新星：

# openstack-service restart nova
# openstack-service status nova
MainPID=1485 Id=openstack-nova-api.service ActiveState=active
MainPID=1500 Id=openstack-nova-cert.service ActiveState=active
MainPID=1509 Id=openstack-nova-compute.service ActiveState=active
MainPID=1483 Id=openstack-nova-conductor.service ActiveState=active
MainPID=1525 Id=openstack-nova-consoleauth.service ActiveState=active
MainPID=1481 Id=openstack-nova-novncproxy.service ActiveState=active
MainPID=1511 Id=openstack-nova-scheduler.service ActiveState=active

创建实例：

# nova boot --image 8a18ee68-1d9e-4a2a-8277-ff29035d7011 --nic net-id=e6db9b9e-4782-44dc-8d99-6bdb9744793d --key openstack --config-drive=True --flavor 3 raw
+--------------------------------------+-----------------------------------------------------+
| Property                             | Value                                               |
+--------------------------------------+-----------------------------------------------------+
| OS-DCF:diskConfig                    | MANUAL                                              |
| OS-EXT-AZ:availability_zone          |                                                     |
| OS-EXT-SRV-ATTR:host                 | -                                                   |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | -                                                   |
| OS-EXT-SRV-ATTR:instance_name        | instance-00000558                                   |
| OS-EXT-STS:power_state               | 0                                                   |
| OS-EXT-STS:task_state                | scheduling                                          |
| OS-EXT-STS:vm_state                  | building                                            |
| OS-SRV-USG:launched_at               | -                                                   |
| OS-SRV-USG:terminated_at             | -                                                   |
| accessIPv4                           |                                                     |
| accessIPv6                           |                                                     |
| adminPass                            | CTXhRYZv8bc3                                        |
| config_drive                         | True                                                |
| created                              | 2017-11-13T20:36:15Z                                |
| flavor                               | m1.medium (3)                                       |
| hostId                               |                                                     |
| id                                   | 0d7aaf0a-0b29-4c6e-b049-270beab7d9c2                |
| image                                | CentOS_7_raw (8a18ee68-1d9e-4a2a-8277-ff29035d7011) |
| key_name                             | openstack                                           |
| metadata                             | {}                                                  |
| name                                 | raw                                                 |
| os-extended-volumes:volumes_attached | []                                                  |
| progress                             | 0                                                   |
| security_groups                      | default                                             |
| status                               | BUILD                                               |
| tenant_id                            | 253f0c717bba45f8adf5c530b7194069                    |
| updated                              | 2017-11-13T20:36:15Z                                |
| user_id                              | f8a7f21341624657b81c882431966265                    |
+--------------------------------------+-----------------------------------------------------+

检查状态：

# nova list
+--------------------------------------+------+--------+------------+-------------+-------------------------+
| ID                                   | Name | Status | Task State | Power State | Networks                |
+--------------------------------------+------+--------+------------+-------------+-------------------------+
| 0d7aaf0a-0b29-4c6e-b049-270beab7d9c2 | raw  | ACTIVE | -          | Running     | network-1=192.168.0.139 |
+--------------------------------------+------+--------+------------+-------------+-------------------------+

检查图像文件：

# qemu-img info /var/lib/nova/instances/0d7aaf0a-0b29-4c6e-b049-270beab7d9c2/disk 
image: /var/lib/nova/instances/0d7aaf0a-0b29-4c6e-b049-270beab7d9c2/disk
file format: raw
virtual size: 40G (42949672960 bytes)
disk size: 8.0G

# ls -alh /var/lib/nova/instances/0d7aaf0a-0b29-4c6e-b049-270beab7d9c2/disk
-rw-r--r--. 1 qemu qemu 40G Nov 13 20:51 /var/lib/nova/instances/0d7aaf0a-0b29-4c6e-b049-270beab7d9c2/disk

OpenStack：以原始磁盘格式启动实例

OpenStack: launch instance with raw disk format

cloud

openstack