Corso Cloud Storage Es4

From Centro Calcolo
Jump to navigation Jump to search

Esercitazione 4

Eseguire i comandi seguenti sul nodo stack-group-0#

Configurazione dei servizi OpenStack per il backend GPFS

Per default i junction point generati al mount dei fileset hanno permission 500 ed ownership root.

  • Modificare a 755 i permessi della directory /gpfs/openstack
root@stack-group-00:~# chmod 755 /gpfs/openstack/

Configurazione e test di Glance

  • Identificare l'utente owner dei servizi glance
  • Create la directory /gpfs/openstack/glance/images con corrette permission ed ownerchip
  • Configurare il servizio glance-api (/etc/glance/glance-api.conf) per utilizzare per lo store delle immagini la directory /gpfs/openstack/glance/images
  • Riavviare il servizio glance-api
  • Come utente openstack admin e project openstack creare una immagine dall'URL cp

Comandi: openstack create image

root@stack-group-00:~# ps -e -o user,group,cmd |grep glance
root     root     grep --color=auto glance
glance   glance   /usr/bin/python /usr/bin/glance-registry --log-file=/var/log/glance/glance-registry.log --config-file=/etc/glance/glance-registry.conf
glance   glance   /usr/bin/python /usr/bin/glance-registry --log-file=/var/log/glance/glance-registry.log --config-file=/etc/glance/glance-registry.conf
glance   glance   /usr/bin/python /usr/bin/glance-registry --log-file=/var/log/glance/glance-registry.log --config-file=/etc/glance/glance-registry.conf
glance   glance   /usr/bin/python /usr/bin/glance-api --log-file=/var/log/glance/glance-api.log --config-file=/etc/glance/glance-api.conf
glance   glance   /usr/bin/python /usr/bin/glance-api --log-file=/var/log/glance/glance-api.log --config-file=/etc/glance/glance-api.conf
glance   glance   /usr/bin/python /usr/bin/glance-api --log-file=/var/log/glance/glance-api.log --config-file=/etc/glance/glance-api.conf 

root@stack-group-00:~# mkdir -m 755 -p /gpfs/openstack/glance/images

root@stack-group-00:~# chown -R glance.glance /gpfs/openstack/glance/

root@stack-group-00:~# ls -ld /gpfs/openstack/glance/
drwxr-xr-x 3 glance glance 4096 ott  2 15:06 /gpfs/openstack/glance/

root@stack-group-00:~# ls -l /gpfs/openstack/glance/
total 0
drwxr-xr-x 2 glance glance 4096 ott  2 15:06 images

Nella sezione [glance_store] del file di configurazione /etc/glance/glance-api.conf:

  • verificare che stores include lo store-type file
  • veirficare che default_store sua file
  • modificare filesystem_store_datadir
[glance_store]
stores = http,file
default_store = file
filesystem_store_datadir = /gpfs/openstack/glance/images/
root@stack-group-00:~# service glance-api restart
glance-api stop/waiting
glance-api start/running, process 31435

Quindi caricare l'immagine raw:

root@stack-group-00:~# openstack --os-image-api-version 1 image create --copy-from http://group-www.recas.ba.infn.it/gpfs/debian-8.6.0-openstack-amd64.raw debian-8.6.0-openstack-amd64.raw
+------------------+--------------------------------------+
| Field            | Value                                |
+------------------+--------------------------------------+
| checksum         | None                                 |
| container_format | bare                                 |
| created_at       | 2016-10-02T14:16:47.000000           |
| deleted          | False                                |
| deleted_at       | None                                 |
| disk_format      | raw                                  |
| id               | 5736c4c9-0697-4ccf-acfe-17a42593dcda |
| is_public        | False                                |
| min_disk         | 0                                    |
| min_ram          | 0                                    |
| name             | debian-8.6.0-openstack-amd64.raw    |
| owner            | d0115388e572440eb53c4a8671fef6ae     |
| properties       |                                      |
| protected        | False                                |
| size             | 8589934592                           |
| status           | queued                               |
| updated_at       | 2016-10-02T14:16:47.000000           |
| virtual_size     | None                                 |
+------------------+--------------------------------------+
root@stack-group-00:~# ls /gpfs/openstack/glance/images/
5736c4c9-0697-4ccf-acfe-17a42593dcda

Configurazione di Nova

  • Creare le directory /gpfs/openstack/nova/instances con permessi 755 ed ownership appropriato
  • Modificare nel file di configurazione /etc/nova/nova.conf il path di accesso alle immagini delle istanze in /gpfs/openstack/nova/instances/
  • riavviare il servizio nova-compute
root@stack-group-00:/etc/nova# mkdir -m 755 -p /gpfs/openstack/nova/instances

root@stack-group-00:/etc/nova# ps -e -ouser,group,cmd |grep nova
root     root     grep --color=auto nova
nova     nova     /usr/sbin/apache2 -k start
nova     nova     /usr/sbin/apache2 -k start
...
nova     nova     /usr/bin/python /usr/bin/nova-api --log-file=/var/log/nova/nova-api.log --config-file=/etc/nova/nova.conf
nova     nova     /usr/bin/python /usr/bin/nova-api --log-file=/var/log/nova/nova-api.log --config-file=/etc/nova/nova.conf
nova     nova     /usr/bin/python /usr/bin/nova-api --log-file=/var/log/nova/nova-api.log --config-file=/etc/nova/nova.conf
root@stack-group-00:/etc/nova# chown -R nova.nova /gpfs/openstack/nova/

Modificare il file /etc/nova/nova.conf aggiungendo nella sezione [DEFAULT]:

[DEFAULT]
...
instances_path=/gpfs/openstack/nova/instances

Riavviare nova-compute

service nova-compute restart

Configurazione di Cinder

  • Creare le directory /gpfs/openstack/cinder/volumes con permessi 755 ed ownership appropriato
  • Nel file di configurazione /etc/cinder/cinder.conf:
    • Aggiungere il backend gpfs tra quelli abilitati
    • Configurare il backend gpfs cone default
    • Aggiungere sezione [gpfs] specificando come driver cinder.volume.drivers.ibm.gpfs.GPFSDriver, mount point /gpfs/openstack/cinder/volumes/, share mode copy_on_write, massimo livello di clone 3 e storage pool system. Specificare inoltre la directory delle immagini glance configurata in precedenza.
  • riavviare i servizi cinder-api e cinder-volume
  • creare un nuovo volume-type chiamato gpfs

Comandi da utilizzare: openstack volume type create

root@stack-group-00:/etc/nova# mkdir -m 755 -p /gpfs/openstack/cinder/volumes
root@stack-group-00:/etc/nova# ps -e -ouser,group,cmd |grep cinder
root     root     grep --color=auto cinder
cinder   cinder   /usr/bin/python /usr/bin/cinder-volume --log-file=/var/log/cinder/cinder-volume.log --config-file=/etc/cinder/cinder.conf
cinder   cinder   /usr/bin/python /usr/bin/cinder-volume --log-file=/var/log/cinder/cinder-volume.log --config-file=/etc/cinder/cinder.conf
cinder   cinder   /usr/bin/python /usr/bin/cinder-scheduler --log-file=/var/log/cinder/cinder-scheduler.log --config-file=/etc/cinder/cinder.conf
cinder   cinder   /usr/bin/python /usr/bin/cinder-api --log-file=/var/log/cinder/cinder-api.log --config-file=/etc/cinder/cinder.conf
cinder   cinder   /usr/bin/python /usr/bin/cinder-api --log-file=/var/log/cinder/cinder-api.log --config-file=/etc/cinder/cinder.conf
cinder   cinder   /usr/bin/python /usr/bin/cinder-api --log-file=/var/log/cinder/cinder-api.log --config-file=/etc/cinder/cinder.conf
root@stack-group-00:/etc/nova# chown -R cinder.cinder /gpfs/openstack/cinder/

Modificare nel file /etc/cinder/cinder.conf:

default_volume_type=gpfs
enabled_backends=BACKEND_1,gpfs

Aggiundgere la sezione:

[gpfs]
volume_driver = cinder.volume.drivers.ibm.gpfs.GPFSDriver
gpfs_mount_point_base = /gpfs/openstack/cinder/volumes/
gpfs_images_dir = /gpfs/openstack/glance/images/
gpfs_images_share_mode = copy_on_write
gpfs_max_clone_depth = 3
gpfs_sparse_volumes = True
gpfs_storage_pool = system
volume_backend_name = GPFS

Creare il volume type:

root@stack-group-00:/etc/nova# openstack volume type create --public gpfs                     
+---------------------------------+--------------------------------------+
| Field                           | Value                                |
+---------------------------------+--------------------------------------+
| description                     | None                                 |
| id                              | ea0624d9-3550-4e3c-98b5-5c55f91d4d33 |
| is_public                       | True                                 |
| name                            | gpfs                                 |
| os-volume-type-access:is_public | True                                 |
+---------------------------------+--------------------------------------+

Assegnare al volume type gpfs la property volume_backend_name=GPFS

root@stack-group-00:~# openstack volume type set gpfs --property volume_backend_name=GPFS
root@stack-group-00:~# openstack volume type show gpfs
+---------------------------------+--------------------------------------+
| Field                           | Value                                |
+---------------------------------+--------------------------------------+
| description                     | None                                 |
| id                              | ea0624d9-3550-4e3c-98b5-5c55f91d4d33 |
| is_public                       | True                                 |
| name                            | gpfs                                 |
| os-volume-type-access:is_public | True                                 |
| properties                      | volume_backend_name='GPFS'           |
| qos_specs_id                    | None                                 |
+---------------------------------+--------------------------------------+


Gestione di Volumi ed Istanze

Creazione di un volume Cinder da un'immagine Glance

  • Creare il volume fromimage00 dell'immagine caricata su glance
  • Mostrare la tipologia gpfs (clone,snapshot,regular file) del volume file creato ed identificare l'eventuale file padre tramite l'inode

Comandi da utilizzare: openstack volume create, openstack volume list, mmclone, ls -lsi

root@stack-group-00:~# openstack volume create --image debian-8.6.0-openstack-amd64.raw --type gpfs --size 4 fromimage00
+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2016-10-02T16:00:24.614262           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | 475821a2-2fc7-40d6-8b2c-ff737f87eb60 |
| migration_status    | None                                 |
| multiattach         | False                                |
| name                | fromimage00                          |
| properties          |                                      |
| replication_status  | disabled                             |
| size                | 4                                    |
| snapshot_id         | None                                 |
| source_volid        | None                                 |
| status              | creating                             |
| type                | gpfs                                 |
| updated_at          | None                                 |
| user_id             | f85114ed0d1545a6a56b6391619f9a15     |
+---------------------+--------------------------------------+
root@stack-group-00:~# mmclone show /gpfs/openstack/cinder/volumes/*
Parent  Depth   Parent inode   File name
------  -----  --------------  ---------
    no      1          148226  /gpfs/openstack/cinder/volumes/volume-475821a2-2fc7-40d6-8b2c-ff737f87eb60
root@stack-group-00:~# ls -lsi /gpfs/openstack/cinder/volumes/                                           
total 0
148233 0 -rw-rw---- 1 root root 10737418240 ott  2 18:00 volume-475821a2-2fc7-40d6-8b2c-ff737f87eb60
root@stack-group-00:~# ls -lsi /gpfs/openstack/glance/images/
total 8388608
148226 8388608 -rw-r----- 2 glance glance 8589934592 ott  2 16:21 5736c4c9-0697-4ccf-acfe-17a42593dcda

Creazione di un'istanza da un'immagine glance

Senza utilizzare il driver GPFS

  • Lanciare un'istanza partendo dall'immagine Glance caricata in precdeenza
  • Verificare la modalita' con cui vengono creati sul filesystem i dischi della macchina virtuale.

Comandi da utilizzare: openstack image list, openstack flavor list, nova boot

root@stack-group-00:~# openstack image list
+--------------------------------------+-----------------------------------+--------+
| ID                                   | Name                              | Status |
+--------------------------------------+-----------------------------------+--------+
| 5736c4c9-0697-4ccf-acfe-17a42593dcda | debian-8.6.0-openstack-amd64.raw  | active |
+--------------------------------------+-----------------------------------+--------+

root@stack-group-00:~# openstack flavor list
+----+-----------+-------+------+-----------+-------+-----------+
| ID | Name      |   RAM | Disk | Ephemeral | VCPUs | Is Public |
+----+-----------+-------+------+-----------+-------+-----------+
| 1  | m1.tiny   |   512 |    1 |         0 |     1 | True      |
| 2  | m1.small  |  2048 |   20 |         0 |     1 | True      |
| 3  | m1.medium |  4096 |   40 |         0 |     2 | True      |
| 4  | m1.large  |  8192 |   80 |         0 |     4 | True      |
| 5  | m1.xlarge | 16384 |  160 |         0 |     8 | True      |
+----+-----------+-------+------+-----------+-------+-----------+

root@stack-group-00:~# nova boot --flavor m1.small --image 5736c4c9-0697-4ccf-acfe-17a42593dcda instance_nogpfs
+--------------------------------------+--------------------------------------------------------------------------+
| Property                             | Value                                                                    |
+--------------------------------------+--------------------------------------------------------------------------+
| OS-DCF:diskConfig                    | MANUAL                                                                   |
| OS-EXT-AZ:availability_zone          |                                                                          |
| OS-EXT-SRV-ATTR:host                 | -                                                                        |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | -                                                                        |
| OS-EXT-SRV-ATTR:instance_name        | instance-0000000a                                                        |
| OS-EXT-STS:power_state               | 0                                                                        |
| OS-EXT-STS:task_state                | scheduling                                                               |
| OS-EXT-STS:vm_state                  | building                                                                 |
| OS-SRV-USG:launched_at               | -                                                                        |
| OS-SRV-USG:terminated_at             | -                                                                        |
| accessIPv4                           |                                                                          |
| accessIPv6                           |                                                                          |
| adminPass                            | vzJofkin4f4X                                                             |
| config_drive                         |                                                                          |
| created                              | 2016-10-02T17:15:48Z                                                     |
| flavor                               | m1.small (2)                                                             |
| hostId                               |                                                                          |
| id                                   | 8d719ddd-85f8-4ed1-886f-cd7d2ba435de                                     |
| image                                | debian-8.6.0-openstack-amd64.raw (5736c4c9-0697-4ccf-acfe-17a42593dcda)  |
| key_name                             | -                                                                        |
| metadata                             | {}                                                                       |
| name                                 | instance_nogpfs                                                          |
| os-extended-volumes:volumes_attached | []                                                                       |
| progress                             | 0                                                                        |
| security_groups                      | default                                                                  |
| status                               | BUILD                                                                    |
| tenant_id                            | d0115388e572440eb53c4a8671fef6ae                                         |
| updated                              | 2016-10-02T17:15:48Z                                                     |
| user_id                              | f85114ed0d1545a6a56b6391619f9a15                                         |
+--------------------------------------+--------------------------------------------------------------------------+

root@stack-group-00:~# ls /gpfs/openstack/nova/instances/8d719ddd-85f8-4ed1-886f-cd7d2ba435de -lh
total 77M
-rw-rw---- 1 libvirt-qemu kvm   42K ott  2 19:16 console.log
-rw-r--r-- 1 libvirt-qemu kvm   76M ott  2 19:18 disk
-rw-r--r-- 1 nova         nova   86 ott  2 19:15 disk.info
-rw-r--r-- 1 nova         nova 2,6K ott  2 19:15 libvirt.xml
root@stack-group-00:~# ls /gpfs/openstack/nova/instances/_base/ -lh
total 8,0G
-rw-r--r-- 1 libvirt-qemu kvm 8,0G ott  2 19:15 9fae948d955243fdce3fbdf50ccc6ac17f6ccbc4

Utilizzando il driver GPFS

  • Lanciare un'istanza partendo dall'immagine Glance caricata in precedenza, creando automaticamente un volume Cinder
  • Verificare la modalita' con cui vengono creati sul filesystem i dischi della macchina virtuale.

Comandi da utilizzare: openstack image list, openstack flavor list, nova boot, mmclone

root@stack-group-00:~# openstack image list
+--------------------------------------+-----------------------------------+--------+
| ID                                   | Name                              | Status |
+--------------------------------------+-----------------------------------+--------+
| 5736c4c9-0697-4ccf-acfe-17a42593dcda | debian-8.6.0-openstack-amd64.raw  | active |
+--------------------------------------+-----------------------------------+--------+

root@stack-group-00:~# openstack flavor list
+--------------------------------------+-----------+-------+------+-----------+-------+-----------+
| ID                                   | Name      |   RAM | Disk | Ephemeral | VCPUs | Is Public |
+--------------------------------------+-----------+-------+------+-----------+-------+-----------+
| 1                                    | m1.tiny   |   512 |    1 |         0 |     1 | True      |
| 2                                    | m1.small  |  2048 |   20 |         0 |     1 | True      |
| 3                                    | m1.medium |  4096 |   40 |         0 |     2 | True      |
| 4                                    | m1.large  |  8192 |   80 |         0 |     4 | True      |
| 5                                    | m1.xlarge | 16384 |  160 |         0 |     8 | True      |
| dbac8379-72f8-4460-9c1a-995316b109e0 | m1.custom |  2048 |   10 |         0 |     1 | True      |
+--------------------------------------+-----------+-------+------+-----------+-------+-----------+

root@stack-group-00:~# nova boot --flavor m1.small --block-device source=image,id=5736c4c9-0697-4ccf-acfe-17a42593dcda,dest=volume,size=10,shutdown=preserver,bootindex=0 gpfsenable
+--------------------------------------+-------------------------------------------------+
| Property                             | Value                                           |
+--------------------------------------+-------------------------------------------------+
| OS-DCF:diskConfig                    | MANUAL                                          |
| OS-EXT-AZ:availability_zone          |                                                 |
| OS-EXT-SRV-ATTR:host                 | -                                               |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | -                                               |
| OS-EXT-SRV-ATTR:instance_name        | instance-00000012                               |
| OS-EXT-STS:power_state               | 0                                               |
| OS-EXT-STS:task_state                | scheduling                                      |
| OS-EXT-STS:vm_state                  | building                                        |
| OS-SRV-USG:launched_at               | -                                               |
| OS-SRV-USG:terminated_at             | -                                               |
| accessIPv4                           |                                                 |
| accessIPv6                           |                                                 |
| adminPass                            | JP6j9xPgYXKQ                                    |
| config_drive                         |                                                 |
| created                              | 2016-10-02T22:07:17Z                            |
| flavor                               | m1.small (2)                                    |
| hostId                               |                                                 |
| id                                   | 6ec2d04b-0866-4b57-8042-e6a562e3b906            |
| image                                | Attempt to boot from volume - no image supplied |
| key_name                             | -                                               |
| metadata                             | {}                                              |
| name                                 | gpfsenable                                      |
| os-extended-volumes:volumes_attached | []                                              |
| progress                             | 0                                               |
| security_groups                      | default                                         |
| status                               | BUILD                                           |
| tenant_id                            | d0115388e572440eb53c4a8671fef6ae                |
| updated                              | 2016-10-02T22:07:17Z                            |
| user_id                              | f85114ed0d1545a6a56b6391619f9a15                |
+--------------------------------------+-------------------------------------------------+
root@stack-group-00:~# mmclone show /gpfs/openstack/cinder/volumes/*
Parent  Depth   Parent inode   File name
------  -----  --------------  ---------
    no      1          148226  /gpfs/openstack/cinder/volumes/volume-475821a2-2fc7-40d6-8b2c-ff737f87eb60
    no      1          148226  /gpfs/openstack/cinder/volumes/volume-7f8ae699-6a59-424c-befc-728aa0cee907
    no      1          148226  /gpfs/openstack/cinder/volumes/volume-906a9380-0c21-4e68-aeb6-e9e9ba8c82ba

Snapshot di un volume via GPFS

  • Eseguire lo snapshot del volume fromimage00 chiamandolo snap_fromimage00
  • Individuare gli effetti dul filesystem di questa operazione
  • Rimuovere lo snapshot: cosa accade ai file su gpfs?
  • Rimuovere il volume: cosa accade ora?
root@stack-group-00:~# openstack volume list
+--------------------------------------+--------------+-----------+------+-------------------------------------+
| ID                                   | Display Name | Status    | Size | Attached to                         |
+--------------------------------------+--------------+-----------+------+-------------------------------------+
| 906a9380-0c21-4e68-aeb6-e9e9ba8c82ba |              | in-use    |   10 | Attached to gpfsenable on /dev/vda  |
| 475821a2-2fc7-40d6-8b2c-ff737f87eb60 | fromimage00  | available |   10 |                                     |
+--------------------------------------+--------------+-----------+------+-------------------------------------+

root@stack-group-00:~# openstack snapshot create --name snap_fromimage00 475821a2-2fc7-40d6-8b2c-ff737f87eb60
+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| created_at  | 2016-10-03T11:55:23.740898           |
| description | None                                 |
| id          | 4cfaf8cc-ebd2-4de8-96c0-3406177aac2f |
| name        | snap_fromimage00                     |
| properties  |                                      |
| size        | 10                                   |
| status      | creating                             |
| updated_at  | None                                 |
| volume_id   | 475821a2-2fc7-40d6-8b2c-ff737f87eb60 |
+-------------+--------------------------------------+

root@stack-group-00:~# openstack snapshot list
+--------------------------------------+------------------+-------------+-----------+------+
| ID                                   | Name             | Description | Status    | Size |
+--------------------------------------+------------------+-------------+-----------+------+
| 4cfaf8cc-ebd2-4de8-96c0-3406177aac2f | snap_fromimage00 | None        | available |   10 |
+--------------------------------------+------------------+-------------+-----------+------+

root@stack-group-00:~# ls -lsi /gpfs/openstack/
cinder/     glance/     nova/       .snapshots/ 

root@stack-group-00:~# ls -lsi /gpfs/openstack/cinder/volumes/
total 148480
181267      0 -rw-r----- 2 root         root 10737418240 ott  3 13:55 snapshot-4cfaf8cc-ebd2-4de8-96c0-3406177aac2f
148233      0 -rw-rw---- 1 root         root 10737418240 ott  2 18:00 volume-475821a2-2fc7-40d6-8b2c-ff737f87eb60
181258 148480 -rw-rw---- 1 libvirt-qemu kvm  10737418240 ott  3 13:03 volume-906a9380-0c21-4e68-aeb6-e9e9ba8c82ba

root@stack-group-00:~# mmclone show /gpfs/openstack/cinder/volumes/*
Parent  Depth   Parent inode   File name
------  -----  --------------  ---------
   yes      1          148226  /gpfs/openstack/cinder/volumes/snapshot-4cfaf8cc-ebd2-4de8-96c0-3406177aac2f
    no      2          181267  /gpfs/openstack/cinder/volumes/volume-475821a2-2fc7-40d6-8b2c-ff737f87eb60
    no      1          148226  /gpfs/openstack/cinder/volumes/volume-906a9380-0c21-4e68-aeb6-e9e9ba8c82ba
root@stack-group-00:~# openstack snapshot delete 4cfaf8cc-ebd2-4de8-96c0-3406177aac2f
root@stack-group-00:~# openstack snapshot list

root@stack-group-00:~# ls -lsi /gpfs/openstack/cinder/volumes/
total 148480
181267      0 -rw-r----- 2 root         root 10737418240 ott  3 13:55 snapshot-4cfaf8cc-ebd2-4de8-96c0-3406177aac2f.ts
148233      0 -rw-rw---- 1 root         root 10737418240 ott  2 18:00 volume-475821a2-2fc7-40d6-8b2c-ff737f87eb60
181258 148480 -rw-rw---- 1 libvirt-qemu kvm  10737418240 ott  3 13:03 volume-906a9380-0c21-4e68-aeb6-e9e9ba8c82ba
root@stack-group-00:~# openstack volume list                                               
+--------------------------------------+--------------+-----------+------+-------------------------------------+
| ID                                   | Display Name | Status    | Size | Attached to                         |
+--------------------------------------+--------------+-----------+------+-------------------------------------+
| 906a9380-0c21-4e68-aeb6-e9e9ba8c82ba |              | in-use    |   10 | Attached to gpfsenable on /dev/vda  |
| 475821a2-2fc7-40d6-8b2c-ff737f87eb60 | fromimage00  | available |   10 |                                     |
+--------------------------------------+--------------+-----------+------+-------------------------------------+

root@stack-group-00:~# openstack volume delete 475821a2-2fc7-40d6-8b2c-ff737f87eb60

root@stack-group-00:~# ls -lsi /gpfs/openstack/cinder/volumes/
total 148480
181258 148480 -rw-rw---- 1 libvirt-qemu kvm 10737418240 ott  3 14:12 volume-906a9380-0c21-4e68-aeb6-e9e9ba8c82ba
root@stack-group-00:~# mmclone show /gpfs/openstack/cinder/volumes/*
Parent  Depth   Parent inode   File name
------  -----  --------------  ---------
    no      1          148226  /gpfs/openstack/cinder/volumes/volume-906a9380-0c21-4e68-aeb6-e9e9ba8c82ba