mirror of
git://git.proxmox.com/git/pve-docs.git
synced 2025-01-21 18:03:45 +03:00
108 lines
2.8 KiB
Plaintext
108 lines
2.8 KiB
Plaintext
[[ceph_rados_block_devices]]
|
|
Ceph RADOS Block Devices (RBD)
|
|
------------------------------
|
|
ifdef::wiki[]
|
|
:pve-toplevel:
|
|
:title: Storage: RBD
|
|
endif::wiki[]
|
|
|
|
Storage pool type: `rbd`
|
|
|
|
http://ceph.com[Ceph] is a distributed object store and file system
|
|
designed to provide excellent performance, reliability and
|
|
scalability. RADOS block devices implement a feature rich block level
|
|
storage, and you get the following advantages:
|
|
|
|
* thin provisioning
|
|
* resizable volumes
|
|
* distributed and redundant (striped over multiple OSDs)
|
|
* full snapshot and clone capabilities
|
|
* self healing
|
|
* no single point of failure
|
|
* scalable to the exabyte level
|
|
* kernel and user space implementation available
|
|
|
|
NOTE: For smaller deployments, it is also possible to run Ceph
|
|
services directly on your {pve} nodes. Recent hardware has plenty
|
|
of CPU power and RAM, so running storage services and VMs on same node
|
|
is possible.
|
|
|
|
[[storage_rbd_config]]
|
|
Configuration
|
|
~~~~~~~~~~~~~
|
|
|
|
This backend supports the common storage properties `nodes`,
|
|
`disable`, `content`, and the following `rbd` specific properties:
|
|
|
|
monhost::
|
|
|
|
List of monitor daemon IPs. Optional, only needed if Ceph is not running on the
|
|
PVE cluster.
|
|
|
|
pool::
|
|
|
|
Ceph pool name.
|
|
|
|
username::
|
|
|
|
RBD user Id. Optional, only needed if Ceph is not running on the PVE cluster.
|
|
|
|
krbd::
|
|
|
|
Access rbd through krbd kernel module. This is required if you want to
|
|
use the storage for containers.
|
|
|
|
.Configuration Example for a external Ceph cluster (`/etc/pve/storage.cfg`)
|
|
----
|
|
rbd: ceph-external
|
|
monhost 10.1.1.20 10.1.1.21 10.1.1.22
|
|
pool ceph-external
|
|
content images
|
|
username admin
|
|
----
|
|
|
|
TIP: You can use the `rbd` utility to do low-level management tasks.
|
|
|
|
Authentication
|
|
~~~~~~~~~~~~~~
|
|
|
|
If you use `cephx` authentication, you need to copy the keyfile from your
|
|
external Ceph cluster to a Proxmox VE host.
|
|
|
|
Create the directory `/etc/pve/priv/ceph` with
|
|
|
|
mkdir /etc/pve/priv/ceph
|
|
|
|
Then copy the keyring
|
|
|
|
scp <cephserver>:/etc/ceph/ceph.client.admin.keyring /etc/pve/priv/ceph/<STORAGE_ID>.keyring
|
|
|
|
The keyring must be named to match your `<STORAGE_ID>`. Copying the
|
|
keyring generally requires root privileges.
|
|
|
|
If Ceph is installed locally on the PVE cluster, this is done automatically by
|
|
'pveceph' or in the GUI.
|
|
|
|
Storage Features
|
|
~~~~~~~~~~~~~~~~
|
|
|
|
The `rbd` backend is a block level storage, and implements full
|
|
snapshot and clone functionality.
|
|
|
|
.Storage features for backend `rbd`
|
|
[width="100%",cols="m,m,3*d",options="header"]
|
|
|==============================================================================
|
|
|Content types |Image formats |Shared |Snapshots |Clones
|
|
|images rootdir |raw |yes |yes |yes
|
|
|==============================================================================
|
|
|
|
ifdef::wiki[]
|
|
|
|
See Also
|
|
~~~~~~~~
|
|
|
|
* link:/wiki/Storage[Storage]
|
|
|
|
endif::wiki[]
|
|
|