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---
tags:
- ceph
- devstack
- openstack
---
[[Installing Ceph on devstack]]
The pool names are:
- volumes for cinder volumes
- images for glance images
- vms for nova "local storage" rbd volumes
- backups for cinder volume backups
https://docs.ceph.com/en/reef/rbd/rados-rbd-cmds/
```
ubuntu@gobs-devstack:~$ sudo rbd ls volumes
volume-5b6cc251-8f3e-4572-a8b9-52efa390ebc3
volume-6f5e81dd-40f3-42f9-aad3-afcf5696387c
volume-ac39d5be-9606-4711-948e-e76c035e2a25
```
Specify the pool in the `info` command:
```
ubuntu@gobs-devstack:~$ sudo rbd info volumes/volume-6f5e81dd-40f3-42f9-aad3-afcf5696387c
rbd image 'volume-6f5e81dd-40f3-42f9-aad3-afcf5696387c':
size 10 GiB in 2560 objects
order 22 (4 MiB objects)
snapshot_count: 0
id: 17d385edc7a94
block_name_prefix: rbd_data.17d385edc7a94
format: 2
features: layering, exclusive-lock, object-map, fast-diff
op_features:
flags:
create_timestamp: Mon Mar 31 12:56:46 2025
access_timestamp: Mon Mar 31 12:56:46 2025
modify_timestamp: Mon Mar 31 12:56:46 2025
parent: volumes/volume-5b6cc251-8f3e-4572-a8b9-52efa390ebc3@snapshot-3d1f148a-5fe4-4df2-87c3-4272565b82c2
overlap: 10 GiB
```
using `rbd du` we can get some actual usage stats:
```
ubuntu@gobs-devstack:~$ sudo rbd du volumes/volume-d66216fc-0b4a-4480-be0e-5530fb8e6004
NAME PROVISIONED USED
volume-d66216fc-0b4a-4480-be0e-5530fb8e6004@volume-e65e7bcf-88a8-4afb-ba5c-0dbb27f402d9.clone_snap 1 GiB 44 MiB
volume-d66216fc-0b4a-4480-be0e-5530fb8e6004@snapshot-05b07e40-8cbc-4f2d-896c-bbfc0cd2c801 10 GiB 52 MiB
volume-d66216fc-0b4a-4480-be0e-5530fb8e6004 10 GiB 10 GiB
<TOTAL> 10 GiB 10 GiB
```
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