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Cinder服务的基本使用

2022-05-06 12:31:40  阅读：177  来源： 互联网

标签：基本 None 服务 -- volume controller openstack Cinder root


cinder概述

OpenStack早期版本是使用nova-volume为云平台提供持久性块存储服务器的。从Folsom版本后，就把作为Nova组成部分的nova-volume分离了出来，形成了独立的Cinder组件。Cinder本身并不直接提供块存储设备实际的管理和服务，而是在虚拟机和具体的存储设备之间引入一个抽象的“逻辑存储卷”。Cinder与Neutron类似也是通过Plugins-Agent的方式通过添加了不同厂家的DRIVE来整合多种厂家的后端存储设备，并通过提供统一的API接口的方式为云平台提供持久性的块设备存储服务，类似于Amazon的EBS（Elastic Block Storage）。Cinder服务的实现在OpenStack众多服务中，只依赖Keystone服务提供认证。可能有些人觉得Cinder提供的Volume作为云主机的云磁盘，因此Cinder与Nova也有依赖关系。其实，这是一种错误的映像，Cinder-Volume创建的“逻辑存储卷”不仅可以用于云主机的云磁盘，也可以用于其他场景，其创建卷的过程与Nova创建的云主机的状态并没有直接关联。或者换个角度来看，Nova创建的云主机也可以不用挂载Cinder创建的Volume而正常运行。

使用“openstack volume service list”命令查询块存储服务状态

[root@controller ~]# openstack volume service list
+------------------+----------------------+------+---------+-------+----------------------------+
| Binary           | Host                 | Zone | Status  | State | Updated At                 |
+------------------+----------------------+------+---------+-------+----------------------------+
| cinder-scheduler | controller.novalocal | nova | enabled | up    | 2022-05-06T12:18:14.000000 |
| cinder-volume    | compute@lvm          | nova | enabled | up    | 2022-05-06T12:18:09.000000 |
+------------------+----------------------+------+---------+-------+----------------------------+

创建块存储

通过使用命令“openstack volume create”创建块存储

[root@controller ~]# openstack help volume create 
usage: openstack volume create [-h] [-f {json,shell,table,value,yaml}]
                               [-c COLUMN] [--max-width <integer>]
                               [--fit-width] [--print-empty] [--noindent]
                               [--prefix PREFIX] [--size <size>]
                               [--type <volume-type>]
                               [--image <image> | --snapshot <snapshot> | --source <volume> | --source-replicated <replicated-volume>]
                               [--description <description>] [--user <user>]
                               [--project <project>]
                               [--availability-zone <availability-zone>]
                               [--consistency-group consistency-group>]
                               [--property <key=value>] [--hint <key=value>]
                               [--multi-attach] [--bootable | --non-bootable]
                               [--read-only | --read-write]
                               <name>

通过命令创建块存储，大小为2G，名称为“volume”

[root@controller ~]# openstack volume create --size 2 volume
+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2022-05-06T12:20:33.000000           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 |
| migration_status    | None                                 |
| multiattach         | False                                |
| name                | volume                               |
| properties          |                                      |
| replication_status  | None                                 |
| size                | 2                                    |
| snapshot_id         | None                                 |
| source_volid        | None                                 |
| status              | creating                             |
| type                | None                                 |
| updated_at          | None                                 |
| user_id             | beafd0ad1b67482e968af2c8a6575c26     |
+---------------------+--------------------------------------+

查看块存储

使用“openstack volume list”命令查看块存储列表信息

[root@controller ~]# openstack volume list
+--------------------------------------+--------+-----------+------+-------------+
| ID                                   | Name   | Status    | Size | Attached to |
+--------------------------------------+--------+-----------+------+-------------+
| 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 | volume | available |    2 |             |
| 6b474457-5942-457e-8c18-8a57b8b3977f |        | available |   20 |             |
+--------------------------------------+--------+-----------+------+-------------+
[root@controller ~]# openstack volume show volume
+--------------------------------+--------------------------------------+
| Field                          | Value                                |
+--------------------------------+--------------------------------------+
| attachments                    | []                                   |
| availability_zone              | nova                                 |
| bootable                       | false                                |
| consistencygroup_id            | None                                 |
| created_at                     | 2022-05-06T12:20:33.000000           |
| description                    | None                                 |
| encrypted                      | False                                |
| id                             | 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 |
| migration_status               | None                                 |
| multiattach                    | False                                |
| name                           | volume                               |
| os-vol-host-attr:host          | compute@lvm#LVM                      |
| os-vol-mig-status-attr:migstat | None                                 |
| os-vol-mig-status-attr:name_id | None                                 |
| os-vol-tenant-attr:tenant_id   | bf36698d9afd45c4b46c1933469a9101     |
| properties                     |                                      |
| replication_status             | None                                 |
| size                           | 2                                    |
| snapshot_id                    | None                                 |
| source_volid                   | None                                 |
| status                         | available                            |
| type                           | None                                 |
| updated_at                     | 2022-05-06T12:20:34.000000           |
| user_id                        | beafd0ad1b67482e968af2c8a6575c26     |
+--------------------------------+--------------------------------------+

挂载云硬盘

将块存储挂载至云主机的命令为“openstack server add volume”，其命令格式为

[root@controller ~]# openstack help server add volume
usage: openstack server add volume [-h] [--device <device>] <server> <volume>

Add volume to server

positional arguments:
  <server>           Server (name or ID)
  <volume>           Volume to add (name or ID)

使用命令将创建的“volume”块存储添加至云主机“test”上,并查看

[root@controller ~]# openstack server add volume test volume
[root@controller ~]# openstack volume list
+--------------------------------------+--------+-----------+------+-------------------------------+
| ID                                   | Name   | Status    | Size | Attached to                   |
+--------------------------------------+--------+-----------+------+-------------------------------+
| 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 | volume | in-use    |    2 | Attached to test on /dev/vdb  |
| 6b474457-5942-457e-8c18-8a57b8b3977f |        | available |   20 |                               |
+--------------------------------------+--------+-----------+------+-------------------------------+

扩展卷的大小

创建完卷后可能因为需求的变更，需要对已有的卷进行扩容操作，这时需要用到“openstack volume set”命令修改卷的信息

[root@controller ~]# openstack  help  volume set
usage: openstack volume set [-h] [--name <name>] [--size <size>]
                            [--description <description>] [--no-property]
                            [--property <key=value>]
                            [--image-property <key=value>] [--state <state>]
                            [--type <volume-type>]
                            [--retype-policy <retype-policy>]
                            [--bootable | --non-bootable]
                            [--read-only | --read-write]
                            <volume>

使用nova volume-detach命令先分离卷，才能进行扩展

[root@controller ~]# openstack volume list
+--------------------------------------+--------+-----------+------+-------------------------------+
| ID                                   | Name   | Status    | Size | Attached to                   |
+--------------------------------------+--------+-----------+------+-------------------------------+
| 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 | volume | in-use    |    2 | Attached to test on /dev/vdb  |
| 6b474457-5942-457e-8c18-8a57b8b3977f |        | available |   20 |                               |
+--------------------------------------+--------+-----------+------+-------------------------------+
[root@controller ~]# nova volume-detach test 13a971b9-3c30-46dd-a9b9-b51d9690c9c3
[root@controller ~]# openstack volume list
+--------------------------------------+--------+-----------+------+-------------+
| ID                                   | Name   | Status    | Size | Attached to |
+--------------------------------------+--------+-----------+------+-------------+
| 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 | volume | available |    2 |             |
| 6b474457-5942-457e-8c18-8a57b8b3977f |        | available |   20 |             |
+--------------------------------------+--------+-----------+------+-------------+

通过命令将 “volume” 卷大小从2G扩容至3G，使用--size参数可修改已创建好的卷大小

[root@controller ~]# openstack volume set --size 3 volume
[root@controller ~]# openstack volume list
+--------------------------------------+--------+-----------+------+-------------+
| ID                                   | Name   | Status    | Size | Attached to |
+--------------------------------------+--------+-----------+------+-------------+
| 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 | volume | available |    3 |             |
| 6b474457-5942-457e-8c18-8a57b8b3977f |        | available |   20 |             |
+--------------------------------------+--------+-----------+------+-------------+

验证卷大小

[root@controller ~]# openstack volume list
+--------------------------------------+--------+-----------+------+-------------+
| ID                                   | Name   | Status    | Size | Attached to |
+--------------------------------------+--------+-----------+------+-------------+
| 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 | volume | available |    3 |             |
| 6b474457-5942-457e-8c18-8a57b8b3977f |        | available |   20 |             |
+--------------------------------------+--------+-----------+------+-------------+
[root@controller ~]# openstack server add volume test volume
[root@controller ~]# openstack volume list
+--------------------------------------+--------+-----------+------+-------------------------------+
| ID                                   | Name   | Status    | Size | Attached to                   |
+--------------------------------------+--------+-----------+------+-------------------------------+
| 13a971b9-3c30-46dd-a9b9-b51d9690c9c3 | volume | in-use    |    3 | Attached to test on /dev/vdb  |
| 6b474457-5942-457e-8c18-8a57b8b3977f |        | available |   20 |                               |
+--------------------------------------+--------+-----------+------+-------------------------------+

标签：基本,None,服务,--,volume,controller,openstack,Cinder,root
来源： https://www.cnblogs.com/hoyeong/p/16228232.html

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