Testing conducted by Openstack Dashboard and Openstack CLI in two ways mirrored download, create, and basic operation of registered image format conversion. Reference "HCIP-Cloud_Computing-OpenStack_V1.0_ Laboratory Manual"
Experimental procedures are as follows:
openstack dashboard operation
Create a mirror
cirros mirror is a relatively small (about 12M) for Linux Mirror, mirror the format QCOW2, after downloading can register directly
Download http://donload.cirros-cloud.net/0.4.0/
select "cirros-0.4.0 -x86_64-disk.img "
Using admin login Openstack Dashboard user interface, in the left navigation bar, select "Project - computing - Mirror", enter the mirror list, click Create "create a mirror"
Create a mirror according to the following information
image name, Img_web
image format, select QCOW2-QEMU Emulator
minimum disk, select 1GB
minimum RAM, select 128MB
image share, select the disclosure indicates that the image can be shared with other projects, private representation item is only belongs to use, here select private
protected sex, the choice is a mirror image can not be deleted, select No indicates that the image can be deleted, is selected here 
, click "create image" to complete the creation of the mirror
return mirror list, waiting for the mirror status change to "run", said mirror successfully registered
Modify Mirror
Select "Project - computing - image", select "Edit image" in the operation list
You can complete the image information in a pop-up interface modified as follows
openstack cli operation
Download image
Download Mirror (cirros), the host controller to the image file in the node upload
scp -P 2230 cirros-0.4.0-x86_64-disk.img [email protected]:/home/osbashLog controller nodes view image file details
qemu-img info cirros-0.4.0-x86_64-disk.img
Creating a Registration Mirror
导入admin用户环境变量
openstack镜像相关命令是openstack image
创建镜像“Img_cli"，镜像格式为”QCOW2",镜像设置为“Private”和“Protected"
openstack image create --disk-format qcow2 --container-format bare --min-disk 1 --min-ram 128 --private --protected --file ./cirros-0.4.0-x86_64-disk.img Img_cli
然后查看镜像列表
openstack image list
修改镜像
将镜像设置为”public"
openstack image set --public --unprotected Img_cli查看镜像详细信息
openstack image show Img_cli
共享镜像
将镜像设置为"shared"
openstack image set --shared Img_cli导入用户“User_cli_01"的环境变量，查看镜像列表中是否会显示镜像”Img_cli"
. User_cli_01-openrc.sh
openstack image list
可以看到，改为共享后，镜像Img_cli会被用户User_cli_01-openrc.sh看到
导入admin的环境变量，并查看镜像列表和项目列表
. admin-openrc.sh
openstack image list
openstack project list
记录镜像“Img_cli"和”Project_cli"的ID
将镜像“Img_cli"添加到项目”Project_cli"中
openstack image add project <IMAGE_ID> <PROJECT_ID>
执行完成后，查看状态为“pending"
导入用户”User_cli_01"的环境变量，查看能否显示共享镜像
. User_cli_01-openrc.sh
openstack image list
转换镜像格式
QCOW2格式支持镜像的压缩，所以通常会将其他格式的镜像转换成QCOW2格式在上传到openstack中。
本次将测试VMDK格式的Ubuntu镜像转换为QCOW2格式
首先下载ubuntu镜像
wget http://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.vmdk然后将镜像文件复制到Controller节点的/home/osbash目录下
scp -P 2230 bionic-server-cloudimg-amd64.vmdk [email protected]:/home/osbash然后进入controller节点，导入用户admin环境变量，并查看镜像文件
ssh -p 2230 [email protected]
. admin_openrc.sh
qemu-img info bionic-server-cloudimg-amd64.vmdk
执行以下命令，将镜像从VMDK格式转换为QCOW2格式
qemu-img convert -f vmdk -O qcow2 -c -p bionic-server-cloudimg-amd64.vmdk bionic-server-cloudimg-amd64.qcow2Where:
-f specifies the input disk image format
-O specifies the output format
-c goal can only be compressed into QCOW2 format
-p Displays progress of the conversion
to wait for image format conversion is completed 
the following command to view the image format conversion information
qemu-img info bionic-server-cloudimg-amd64.qcow2 
Execute the following command to create a mirror Ubuntu_cli, format QCOW2, and mirror state Public Unprotected
openstack image create --disk-format qcow2 --container-format bare --min-disk 1 --min-ram 128 --public --unprotected --file ./bionic-server-cloudimg-amd64.qcow2 Ubuntu_cli
Export Mirror
View mirror list
openstack image list
Save Mirror "Ubuntu_cli" to localopenstack image save --file Ubuntu.qcow2 Ubuntu_cli
And then view the saved image file