Block Storage¶

Create a volume¶

1. Source the demo credentials to perform the following steps as a non-administrative project:

   $ . demo-openrc
   

2. Create a 1 GB volume:

   $ openstack volume create --size 1 volume1
   +---------------------+--------------------------------------+
   | Field               | Value                                |
   +---------------------+--------------------------------------+
   | attachments         | []                                   |
   | availability_zone   | nova                                 |
   | bootable            | false                                |
   | consistencygroup_id | None                                 |
   | created_at          | 2016-03-08T14:30:48.391027           |
   | description         | None                                 |
   | encrypted           | False                                |
   | id                  | a1e8be72-a395-4a6f-8e07-856a57c39524 |
   | multiattach         | False                                |
   | name                | volume1                              |
   | properties          |                                      |
   | replication_status  | disabled                             |
   | size                | 1                                    |
   | snapshot_id         | None                                 |
   | source_volid        | None                                 |
   | status              | creating                             |
   | type                | None                                 |
   | updated_at          | None                                 |
   | user_id             | 684286a9079845359882afc3aa5011fb     |
   +---------------------+--------------------------------------+
   

3. After a short time, the volume status should change from creating to available:

   $ openstack volume list
   +--------------------------------------+--------------+-----------+------+-------------+
   | ID                                   | Display Name | Status    | Size | Attached to |
   +--------------------------------------+--------------+-----------+------+-------------+
   | a1e8be72-a395-4a6f-8e07-856a57c39524 | volume1      | available |    1 |             |
   +--------------------------------------+--------------+-----------+------+-------------+
   

Attach the volume to an instance¶

1. Attach a volume to an instance:

   $ openstack server add volume INSTANCE_NAME VOLUME_NAME
   

   Replace INSTANCE_NAME with the name of the instance and VOLUME_NAME with the name of the volume you want to attach to it.

   Example

   Attach the volume1 volume to the provider-instance instance:

   $ openstack server add volume provider-instance volume1
   

   Note

   This command provides no output.

2. List volumes:

   $ openstack volume list
   +--------------------------------------+--------------+--------+------+--------------------------------------------+
   | ID                                   | Display Name | Status | Size | Attached to                                |
   +--------------------------------------+--------------+--------+------+--------------------------------------------+
   | a1e8be72-a395-4a6f-8e07-856a57c39524 | volume1      | in-use |    1 | Attached to provider-instance on /dev/vdb  |
   +--------------------------------------+--------------+--------+------+--------------------------------------------+
   

3. Access your instance using SSH and use the fdisk command to verify presence of the volume as the /dev/vdb block storage device:

    $ sudo fdisk -l
   
    Disk /dev/vda: 1073 MB, 1073741824 bytes
    255 heads, 63 sectors/track, 130 cylinders, total 2097152 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000
   
       Device Boot      Start         End      Blocks   Id  System
   /dev/vda1   *       16065     2088449     1036192+  83  Linux
   
    Disk /dev/vdb: 1073 MB, 1073741824 bytes
    16 heads, 63 sectors/track, 2080 cylinders, total 2097152 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000
   
    Disk /dev/vdb doesn't contain a valid partition table
   

   Note

   You must create a file system on the device and mount it to use the volume.

For more information about how to manage volumes, see the Manage volumes in OpenStack End User Guide.

Return to Launch an instance.