ceph/doc/start/os-recommendations.rst

   1 ====================
   2  OS Recommendations
   3 ====================
   4
   5 Ceph Dependencies
   6 =================
   7
   8 As a general rule, we recommend deploying Ceph on newer releases of Linux.
   9 We also recommend deploying on releases with long-term support.
  10
  11 Linux Kernel
  12 ------------
  13
  14 - **Ceph Kernel Client**
  15
  16   If you are using the kernel client to map RBD block devices or mount
  17   CephFS, the general advice is to use a "stable" or "longterm
  18   maintenance" kernel series provided by either http://kernel.org or
  19   your Linux distribution on any client hosts.
  20
  21   For RBD, if you choose to *track* long-term kernels, we recommend
  22   *at least* 4.19-based "longterm maintenance" kernel series.  If you can
  23   use a newer "stable" or "longterm maintenance" kernel series, do it.
  24
  25   For CephFS, see the section about `Mounting CephFS using Kernel Driver`_
  26   for kernel version guidance.
  27
  28   Older kernel client versions may not support your `CRUSH tunables`_ profile
  29   or other newer features of the Ceph cluster, requiring the storage cluster to
  30   be configured with those features disabled. For RBD, a kernel of version 5.3
  31   or CentOS 8.2 is the minimum necessary for reasonable support for RBD image
  32   features.
  33
  34
  35 Platforms
  36 =========
  37
  38 The charts below show how Ceph's requirements map onto various Linux
  39 platforms.  Generally speaking, there is very little dependence on
  40 specific distributions outside of the kernel and system initialization
  41 package (i.e., sysvinit, systemd).
  42
  43 +--------------+--------+------------------------+--------------------------------+-------------------+-----------------+
  44 | Release Name | Tag    | CentOS                 | Ubuntu                         | OpenSUSE :sup:`C` | Debian :sup:`C` |
  45 +==============+========+========================+================================+===================+=================+
  46 | Quincy       | 17.2.z | 8 :sup:`A`             | 20.04 :sup:`A`                 | 15.3              | 11              |
  47 +--------------+--------+------------------------+--------------------------------+-------------------+-----------------+
  48 | Pacific      | 16.2.z | 8 :sup:`A`             | 18.04 :sup:`C`, 20.04 :sup:`A` | 15.2              | 10, 11          |
  49 +--------------+--------+------------------------+--------------------------------+-------------------+-----------------+
  50 | Octopus      | 15.2.z | 7 :sup:`B` 8 :sup:`A`  | 18.04 :sup:`C`, 20.04 :sup:`A` | 15.2              | 10              |
  51 +--------------+--------+------------------------+--------------------------------+-------------------+-----------------+
  52
  53 - **A**: Ceph provides packages and has done comprehensive tests on the software in them.
  54 - **B**: Ceph provides packages and has done basic tests on the software in them.
  55 - **C**: Ceph provides packages only. No tests have been done on these releases.
  56
  57 .. note::
  58    **For Centos 7 Users**
  59
  60    ``Btrfs`` is no longer tested on Centos 7 in the Octopus release. We recommend using ``bluestore`` instead.
  61
  62 .. _CRUSH Tunables: ../../rados/operations/crush-map#tunables
  63
  64 .. _Mounting CephFS using Kernel Driver: ../../cephfs/mount-using-kernel-driver#which-kernel-version