You can only attach a volume to one instances at a time.
Attaching Volume
Web Interface
Click the drop-down menu on the right hand side (in Actions column) and select MANAGE ATTACHMENTS
...
Get the Server ID (Instances) and Volume ID (Volume) using command
| Code Block | ||
|---|---|---|
| ||
$ openstack server list
+--------------------------------------+--------------------------+--------+----------------------------------------+---------------------------------------------------------+--------------+
| ID | Name | Status | Networks | Image | Flavor |
+--------------------------------------+--------------------------+--------+----------------------------------------+---------------------------------------------------------+--------------+
| 6b2bedc4-9d8e-4bf3-be63-1dd49bc2e188 | test-resize-rebuild | ACTIVE | Internal=172.16.102.207 | ubuntu-focal-20.04-gui | c3.small |
+--------------------------------------+--------------------------+--------+----------------------------------------+---------------------------------------------------------+--------------+
$ openstack volume list
+--------------------------------------+-------------------+-----------+------+-----------------------------------+
| ID | Name | Status | Size | Attached to |
+--------------------------------------+-------------------+-----------+------+-----------------------------------+
| 2d61791d-5f52-46e1-81ac-05221c308fe8 | test-cli-snapshot | available | 3 | |
+--------------------------------------+-------------------+-----------+------+-----------------------------------+ |
Run
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|---|---|---|
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openstack server add volume <server-id> <volume-id> --device <device-name> |
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|---|---|---|
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$ openstack server add volume 6b2bedc4-9d8e-4bf3-be63-1dd49bc2e188 2d61791d-5f52-46e1-81ac-05221c308fe8 --device /dev/vdb
+-----------+--------------------------------------+
| Field | Value |
+-----------+--------------------------------------+
| ID | 2d61791d-5f52-46e1-81ac-05221c308fe8 |
| Server ID | 6b2bedc4-9d8e-4bf3-be63-1dd49bc2e188 |
| Volume ID | 2d61791d-5f52-46e1-81ac-05221c308fe8 |
| Device | /dev/vdb |
+-----------+--------------------------------------+ |
Accessing the volume
- Log-in to the attached instance using SSH
(Optional only for new volume) Format the volume (we use ext4 here and assume the attach point is
/dev/vdb) (Formatting will wipe your data):Code Block theme Emacs sudo mkfs.ext4 /dev/vdb
Use
lsblkto confirm the device path (usually typedisk). The value shown in OpenStack can be inaccurate.Code Block theme Emacs $ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 73.1M 1 loop /snap/lxd/21902 loop1 7:1 0 55.4M 1 loop /snap/core18/2128 loop3 7:3 0 72.6M 1 loop /snap/lxd/21750 loop4 7:4 0 61.9M 1 loop /snap/core20/1169 loop5 7:5 0 32.5M 1 loop /snap/snapd/13640 loop7 7:7 0 42.2M 1 loop /snap/snapd/14066 loop8 7:8 0 55.5M 1 loop /snap/core18/2253 loop9 7:9 0 61.9M 1 loop /snap/core20/1242 sr0 11:0 1 470K 0 rom /mnt/context vda 252:0 0 20G 0 disk ├─vda1 252:1 0 19.9G 0 part / ├─vda14 252:14 0 4M 0 part └─vda15 252:15 0 106M 0 part /boot/efi vdc 252:32 0 3G 0 disk
Mount the volume (we use the folder
/mnt/test-volumeas example)Code Block theme Emacs sudo mkdir /mnt/test-volume
Add this mount point to /etc/fstab, so it will be mounted automatically on startup
Code Block theme Emacs sudo vim /etc/fstab
Add/edit the following line:
Code Block theme Emacs /dev/vdb /mnt/test-volume ext4 defaults 0 0
You still need to manually mount it now
Code Block theme Emacs sudo mount /mnt/test-volume
- (Optional)You may also want to change the permission of the directory using
chmodto enable read/write withoutsudoCode Block theme Emacs chmod