Latest revision as of 06:14, 25 April 2012

Description

Provide nova-volumes to compute instances

Nova-volume is a service that allows you to give extra block level storage to your OpenStack Compute instances (using iSCSI and LVM)

Start the SCSI target daemon

$> sudo systemctl start tgtd.service
$> sudo systemctl enable tgtd.service

Ensure the nova-volume service is enabled

$> sudo nova-manage service list

Create a new 5GB volume

$> euca-create-volume -s 5 -z nova

View status of volumes, and wait for it to become 'available'

$> euca-describe-volumes

Make the storage available to the instance (note -d is the device on the compute node)

$> euca-attach-volume -i i-00000001 -d /dev/vdc vol-00000001

ssh to the instance and verify that the vdc device is listed in /proc/partitions

$> cat /proc/partitions

Now make the device available if /dev/vdc is not already present

$> mknod /dev/vdc b 252 32

Create and mount a file system directly on the device

$> mkfs.ext3 /dev/vdc
$> mkdir /mnt/nova-volume
$> mount /dev/vdc /mnt/nova-volume

Display some file system details

$> df -h /dev/vdc

Unmount the volume again:

$> umount /mnt/nova-volume

Exit from the ssh session, detach and delete the volume:

$> euca-detach-volume vol-00000001
$> euca-delete-volume vol-00000001

The file system should be created, mounted and reported correctly by df.

There should be no new errors in the logs:

$> grep -i error /var/log/nova/*.log

@@ Line 10: / Line 10: @@
 Start the SCSI target daemon
-  $> sudo service tgtd start
+  $> sudo systemctl start tgtd.service
-  $> sudo chkconfig tgtd on
+  $> sudo systemctl enable tgtd.service
 Ensure the nova-volume service is enabled
@@ Line 30: / Line 30: @@
 (note -d is the device on the compute node)
-  $> euca-attach-volume -i i-00000001 -d /dev/vdb vol-00000001
+  $> euca-attach-volume -i i-00000001 -d /dev/vdc vol-00000001
+ssh to the instance and verify that the vdc device
+is listed in /proc/partitions
+ $> cat /proc/partitions
+Now make the device available if /dev/vdc is not already present
+ $> mknod /dev/vdc b 252 32
+Create and mount a file system directly on the device
+ $> mkfs.ext3 /dev/vdc
+ $> mkdir /mnt/nova-volume
+ $> mount /dev/vdc /mnt/nova-volume
+Display some file system details
+ $> df -h /dev/vdc
+Unmount the volume again:
+ $> umount /mnt/nova-volume
+Exit from the ssh session, detach and delete the volume:
+ $> euca-detach-volume vol-00000001
+ $> euca-delete-volume vol-00000001
 |results=
-ssh to the instance and verify that the /dev/vdb device
+The file system should be created, mounted and
-is available and usable as a disk
+reported correctly by df.
+There should be no new errors in the logs:
+ $> grep -i error /var/log/nova/*.log
 }}
 [[Category:OpenStack Test Cases]]
-[[Category:Cloud SIG]]