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1 | [[storage_cephfs]] | |
2 | Ceph Filesystem (CephFS) | |
3 | ------------------------ | |
4 | ifdef::wiki[] | |
5 | :pve-toplevel: | |
6 | :title: Storage: CephFS | |
7 | endif::wiki[] | |
8 | ||
9 | Storage pool type: `cephfs` | |
10 | ||
11 | CephFS implements a POSIX-compliant filesystem using a http://ceph.com[Ceph] | |
12 | storage cluster to store its data. As CephFS builds on Ceph it shares most of | |
13 | its properties, this includes redundancy, scalability, self healing and high | |
14 | availability. | |
15 | ||
16 | TIP: {pve} can xref:chapter_pveceph[manage ceph setups], which makes | |
17 | configuring a CephFS storage easier. As recent hardware has plenty of CPU power | |
18 | and RAM, running storage services and VMs on same node is possible without a | |
19 | big performance impact. | |
20 | ||
21 | To use the CephFS storage plugin you need update the debian stock Ceph client. | |
22 | Add our Ceph repository xref:sysadmin_package_repositories_ceph[Ceph repository]. | |
23 | Once added, run an `apt update` and `apt dist-upgrade` cycle to get the newest | |
24 | packages. | |
25 | ||
26 | You need to make sure that there is no other Ceph repository configured, | |
27 | otherwise the installation will fail or there will be mixed package | |
28 | versions on the node, leading to unexpected behavior. | |
29 | ||
30 | [[storage_cephfs_config]] | |
31 | Configuration | |
32 | ~~~~~~~~~~~~~ | |
33 | ||
34 | This backend supports the common storage properties `nodes`, | |
35 | `disable`, `content`, and the following `cephfs` specific properties: | |
36 | ||
37 | monhost:: | |
38 | ||
39 | List of monitor daemon addresses. Optional, only needed if Ceph is not running | |
40 | on the PVE cluster. | |
41 | ||
42 | path:: | |
43 | ||
44 | The local mount point. Optional, defaults to `/mnt/pve/<STORAGE_ID>/`. | |
45 | ||
46 | username:: | |
47 | ||
48 | Ceph user id. Optional, only needed if Ceph is not running on the PVE cluster | |
49 | where it defaults to `admin`. | |
50 | ||
51 | subdir:: | |
52 | ||
53 | CephFS subdirectory to mount. Optional, defaults to `/`. | |
54 | ||
55 | fuse:: | |
56 | ||
57 | Access CephFS through FUSE, instead of the kernel client. Optional, defaults | |
58 | to `0`. | |
59 | ||
60 | .Configuration Example for a external Ceph cluster (`/etc/pve/storage.cfg`) | |
61 | ---- | |
62 | cephfs: cephfs-external | |
63 | monhost 10.1.1.20 10.1.1.21 10.1.1.22 | |
64 | path /mnt/pve/cephfs-external | |
65 | content backup | |
66 | username admin | |
67 | ---- | |
68 | NOTE: Don't forget to setup the client secret key file if cephx was not turned | |
69 | off. | |
70 | ||
71 | Authentication | |
72 | ~~~~~~~~~~~~~~ | |
73 | ||
74 | If you use the, by-default enabled, `cephx` authentication, you need to copy | |
75 | the secret from your external Ceph cluster to a Proxmox VE host. | |
76 | ||
77 | Create the directory `/etc/pve/priv/ceph` with | |
78 | ||
79 | mkdir /etc/pve/priv/ceph | |
80 | ||
81 | Then copy the secret | |
82 | ||
83 | scp cephfs.secret <proxmox>:/etc/pve/priv/ceph/<STORAGE_ID>.secret | |
84 | ||
85 | The secret must be named to match your `<STORAGE_ID>`. Copying the | |
86 | secret generally requires root privileges. The file must only contain the | |
87 | secret key itself, opposed to the `rbd` backend which also contains a | |
88 | `[client.userid]` section. | |
89 | ||
90 | A secret can be received from the ceph cluster (as ceph admin) by issuing the | |
91 | following command. Replace the `userid` with the actual client ID configured to | |
92 | access the cluster. For further ceph user management see the Ceph docs | |
93 | footnote:[Ceph user management {cephdocs-url}/rados/operations/user-management/]. | |
94 | ||
95 | ceph auth get-key client.userid > cephfs.secret | |
96 | ||
97 | If Ceph is installed locally on the PVE cluster, i.e., setup with `pveceph`, | |
98 | this is done automatically. | |
99 | ||
100 | Storage Features | |
101 | ~~~~~~~~~~~~~~~~ | |
102 | ||
103 | The `cephfs` backend is a POSIX-compliant filesystem on top of a Ceph cluster. | |
104 | ||
105 | .Storage features for backend `cephfs` | |
106 | [width="100%",cols="m,m,3*d",options="header"] | |
107 | |============================================================================== | |
108 | |Content types |Image formats |Shared |Snapshots |Clones | |
109 | |vztmpl iso backup snippets |none |yes |yes^[1]^ |no | |
110 | |============================================================================== | |
111 | ^[1]^ Snapshots, while no known bugs, cannot be guaranteed to be stable yet, as | |
112 | they lack testing. | |
113 | ||
114 | ifdef::wiki[] | |
115 | ||
116 | See Also | |
117 | ~~~~~~~~ | |
118 | ||
119 | * link:/wiki/Storage[Storage] | |
120 | ||
121 | endif::wiki[] | |
122 |