Glance基础服务运维

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目录

Glance镜像服务介绍

Glance是OpenStack镜像服务,用来注册、登陆和检索虚拟机镜像。Glance服务提供了一个REST API,使读者能够查询虚拟机镜像元数据和检索的实际镜像。通过镜像服务提供的虚拟机镜像可以存储在不同的位置,从简单的文件系统对象存储到类似OpenStack对象存储系统。

创建镜像

CirrOS是一个极小的云操作系统,可以使用这个小的操作系统来进行Glance服务组件的操作练习。将提供的cirros-0.3.4-x86_64-disk.img镜像上传到controller节点的root目录下面

[root@controller ~]# ls
cirros-0.3.4-x86_64-disk.img

将镜像上传至controller节点后,通过file命令查看镜像文件信息

[root@controller ~]# file cirros-0.3.4-x86_64-disk.img 
cirros-0.3.4-x86_64-disk.img: QEMU QCOW Image (v2), 41126400 bytes

通过命令创建镜像,命令的格式如下:

[root@controller images]# glance help image-create 
usage: glance image-create [--architecture <ARCHITECTURE>]
                           [--protected [True|False]] [--name <NAME>]
                           [--instance-uuid <INSTANCE_UUID>]
                           [--min-disk <MIN_DISK>] [--visibility <VISIBILITY>]
                           [--kernel-id <KERNEL_ID>]
                           [--tags <TAGS> [<TAGS> ...]]
                           [--os-version <OS_VERSION>]
                           [--disk-format <DISK_FORMAT>]
                           [--os-distro <OS_DISTRO>] [--id <ID>]
                           [--owner <OWNER>] [--ramdisk-id <RAMDISK_ID>]
                           [--min-ram <MIN_RAM>]
                           [--container-format <CONTAINER_FORMAT>]
                           [--property <key=value>] [--file <FILE>]
                           [--progress]
 #参数说明
--disk-format:镜像格式
--container-format: 镜像在其他项目中可见性
--progress: 显示上传镜像的进度
--file:选择本地镜像文件
--name:上传后镜像的名称

使用镜像cirros-0.3.4-x86_64-disk.img通过命令上传镜像至OpenStack中

[root@controller ~]# glance image-create --name cirros-0.3.4 --disk-format qcow2 --container-format bare --progress < cirros-0.3.4-x86_64-disk.img 
[=============================>] 100%
+------------------+--------------------------------------------------------------------+
| Property         | Value                                                              |
+------------------+--------------------------------------------------------------------+
| checksum         | f8ab98ff5e73ebab884d80c9dc9c7290                                   |
| container_format | bare                                                               |
| created_at       | 2022-02-10T03:15:29Z                                               |
| disk_format      | qcow2                                                              |
| id               | 32a2513c-e5ba-438b-a5ee-63c35c03b284                               |
| min_disk         | 0                                                                  |
| min_ram          | 0                                                                  |
| name             | cirros-0.3.4                                                       |
| os_hash_algo     | sha512                                                             |
| os_hash_value    | f0fd1b50420dce4ca382ccfbb528eef3a38bbeff00b54e95e3876b9bafe7ed2d6f9
                     19ca35d9046d437c6d2d8698b1174a335fbd66035bb3edc525d2cdb187232      |
| os_hidden        | False                                                              |
| owner            | 1776912d52a7444d8b2d09eb86e8d1d9                                   |
| protected        | False                                                              |
| size             | 13267968                                                           |
| status           | active                                                             |
| tags             | []                                                                 |
| updated_at       | 2022-02-10T03:15:29Z                                               |
| virtual_size     | Not available                                                      |
| visibility       | shared                                                             |
+------------------+--------------------------------------------------------------------+

查看镜像

通过命令可以在OpenStack平台中查看当前glance中所上传的镜像名称

[root@controller ~]# glance image-list
+--------------------------------------+--------------+
| ID                                   | Name         |
+--------------------------------------+--------------+
| 32a2513c-e5ba-438b-a5ee-63c35c03b284 | cirros-0.3.4 |
+--------------------------------------+--------------+

也可以使用命令查看镜像的详细信息

[root@controller ~]# glance image-show  32a2513c-e5ba-438b-a5ee-63c35c03b284
+------------------+--------------------------------------------------------------------+
| Property         | Value                                                              |
+------------------+------------------------------------------------------------------ -+
| checksum         | f8ab98ff5e73ebab884d80c9dc9c7290                                   |
| container_format | bare                                                               |
| created_at       | 2022-02-10T03:15:29Z                                               |
| disk_format      | qcow2                                                              |
| id               | 32a2513c-e5ba-438b-a5ee-63c35c03b284                               |
| min_disk         | 0                                                                  |
| min_ram          | 0                                                                  |
| name             | cirros-0.3.4                                                       |
| os_hash_algo     | sha512                                                             |
| os_hash_value    | f0fd1b50420dce4ca382ccfbb528eef3a38bbeff00b54e95e3876b9bafe7ed2d6f9
                     19ca35d9046d437c6d2d8698b1174a335fbd66035bb3edc525d2cdb187232      |
| os_hidden        | False                                                              |
| owner            | 1776912d52a7444d8b2d09eb86e8d1d9                                   |
| protected        | False                                                              |
| size             | 13267968                                                           |
| status           | active                                                             |
| tags             | []                                                                 |
| updated_at       | 2022-02-10T03:15:29Z                                               |
| virtual_size     | Not available                                                      |
| visibility       | shared                                                             |
+------------------+--------------------------------------------------------------------+

修改镜像

可以使用glance image-update更新镜像信息,命令的格式如下

[root@controller images]# glance help image-update 
usage: glance image-update [--architecture <ARCHITECTURE>]
                           [--protected [True|False]] [--name <NAME>]
                           [--instance-uuid <INSTANCE_UUID>]
                           [--min-disk <MIN_DISK>] [--visibility <VISIBILITY>]
                           [--kernel-id <KERNEL_ID>]
                           [--os-version <OS_VERSION>]
                           [--disk-format <DISK_FORMAT>]
                           [--os-distro <OS_DISTRO>] [--owner <OWNER>]
                           [--ramdisk-id <RAMDISK_ID>] [--min-ram <MIN_RAM>]
                           [--container-format <CONTAINER_FORMAT>]
                           [--property <key=value>] [--remove-property key]
                           <IMAGE_ID>
#参数说明
--min-disk:镜像启动最小硬盘大小
--name:镜像名称
--disk-format:镜像格式
--min-ram:镜像启动最小内存大小
--container-format:镜像在项目中可见性

如果需要改变镜像启动硬盘最低要求值(min-disk)1G,min-disk默认单位为G。使用glance image-update更新镜像信息操作如下

[root@controller ~]# glance image-update --min-disk=1 32a2513c-e5ba-438b-a5ee-63c35c03b284
+------------------+--------------------------------------------------------------------+
| Property         | Value                                                              |
+------------------+--------------------------------------------------------------------+
| checksum         | f8ab98ff5e73ebab884d80c9dc9c7290                                   |
| container_format | bare                                                               |
| created_at       | 2022-02-10T03:15:29Z                                               |
| disk_format      | qcow2                                                              |
| id               | 32a2513c-e5ba-438b-a5ee-63c35c03b284                               |
| min_disk         | 1                                                                  |
| min_ram          | 0                                                                  |
| name             | cirros-0.3.4                                                       |
| os_hash_algo     | sha512                                                             |
| os_hash_value    | f0fd1b50420dce4ca382ccfbb528eef3a38bbeff00b54e95e3876b9bafe7ed2d6f9
                     19ca35d9046d437c6d2d8698b1174a335fbd66035bb3edc525d2cdb187232      |
| os_hidden        | False                                                              |
| owner            | 1776912d52a7444d8b2d09eb86e8d1d9                                   |
| protected        | False                                                              |
| size             | 13267968                                                           |
| status           | active                                                             |
| tags             | []                                                                 |
| updated_at       | 2022-02-10T03:16:59Z                                               |
| virtual_size     | Not available                                                      |
| visibility       | shared                                                             |
+------------------+--------------------------------------------------------------------+

也可以使用命令更新镜像启动内存最低要求值(min-ram)为1G,min-ram默认单位为M。使用glance image-update更新镜像信息操作如下:

[root@controller ~]# glance image-update --min-ram=1024 32a2513c-e5ba-438b-a5ee-63c35c03b284
+------------------+--------------------------------------------------------------------+
| Property         | Value                                                              |
+------------------+--------------------------------------------------------------------+
| checksum         | f8ab98ff5e73ebab884d80c9dc9c7290                                   |
| container_format | bare                                                               |
| created_at       | 2022-02-10T03:15:29Z                                               |
| disk_format      | qcow2                                                              |
| id               | 32a2513c-e5ba-438b-a5ee-63c35c03b284                               |
| min_disk         | 1                                                                  |
| min_ram          | 1024                                                               |
| name             | cirros-0.3.4                                                       |
| os_hash_algo     | sha512                                                             |
| os_hash_value    | f0fd1b50420dce4ca382ccfbb528eef3a38bbeff00b54e95e3876b9bafe7ed2d6f9
                     19ca35d9046d437c6d2d8698b1174a335fbd66035bb3edc525d2cdb187232      |
| os_hidden        | False                                                              |
| owner            | 1776912d52a7444d8b2d09eb86e8d1d9                                   |
| protected        | False                                                              |
| size             | 13267968                                                           |
| status           | active                                                             |
| tags             | []                                                                 |
| updated_at       | 2022-02-10T03:17:21Z                                               |
| virtual_size     | Not available                                                      |
| visibility       | shared                                                             |
+------------------+--------------------------------------------------------------------+

删除镜像

可以使用glance image-delete删除上传至OpenStack平台中的镜像,只需要在命令后跟上镜像ID即可

[root@controller images]# glance image-delete 32a2513c-e5ba-438b-a5ee-63c35c03b284
[root@controller images]# glance image-list
+--------------------------------------+------------------------------+
| ID                                   | Name                         |
+--------------------------------------+------------------------------+
+--------------------------------------+------------------------------+
    原文作者:huhy
    原文地址: https://www.cnblogs.com/hoyeong/p/16211055.html
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
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