Configurare Ceph come backend per Glance, Cinder e Nova in OpenStack 2025.1.

glance-api.conf

[DEFAULT]
enabled_backends = rbd:rbd,http:http,cinder:cinder

[glance_store]
default_backend = rbd

[rbd]
rbd_store_pool = images
rbd_store_user = glance
rbd_store_ceph_conf = /etc/ceph/ceph.conf
rbd_store_chunk_size = 8

cinder.conf

[DEFAULT]
enabled_backends = rbd

[rbd]
image_upload_use_cinder_backend = True
image_upload_use_internal_tenant = True
rados_connect_timeout = -1
rbd_ceph_conf = /etc/ceph/ceph.conf
rbd_flatten_volume_from_snapshot = False
rbd_max_clone_depth = 5
rbd_pool = volumes
rbd_secret_uuid = ad44c82d-e905-4d13-bfad-8fe47567a8e0
rbd_store_chunk_size = 4
rbd_user = cinder
report_discard_supported = True
volume_backend_name = rbd
volume_driver = cinder.volume.drivers.rbd.RBDDriver

Per verificare che le secret corrispondano, si legge la secret per libvirt, che deve corrispondere a quella del keyring definito in ceph per cinder:

root@os-worker-2:~# virsh secret-list
 UUID                                   Usage
-------------------------------------------------------------------
 ad44c82d-e905-4d13-bfad-8fe47567a8e0   ceph client.cinder secret

root@os-worker-2:~# virsh secret-get-value ad44c82d-e905-4d13-bfad-8fe47567a8e0
AQCg0eRoZJzYJxAAvXBnsXlzg7L5zPMk6U4sUg==

nova.conf

[libvirt]
inject_partition = -2
inject_password = False
inject_key = False
virt_type = kvm
# ceph rbd support
rbd_user = cinder
rbd_secret_uuid = ad44c82d-e905-4d13-bfad-8fe47567a8e0
images_type = rbd
images_rbd_pool = vms
images_rbd_ceph_conf = /etc/ceph/ceph.conf
live_migration_with_native_tls = true
live_migration_scheme = tls
live_migration_inbound_addr = 10.224.10.34
hw_disk_discard = unmap
disk_cachemodes = network=writeback