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 currently recommend
  22   4.x-based "longterm maintenance" kernel series:
  23
  24   - 4.9.z
  25   - 4.4.z
  26
  27   For CephFS, see `CephFS best practices`_ for kernel version guidance.
  28
  29   Older kernel client versions may not support your `CRUSH tunables`_ profile
  30   or other newer features of the Ceph cluster, requiring the storage cluster
  31   to be configured with those features disabled.
  32
  33
  34 Platforms
  35 =========
  36
  37 The charts below show how Ceph's requirements map onto various Linux
  38 platforms.  Generally speaking, there is very little dependence on
  39 specific distributions aside from the kernel and system initialization
  40 package (i.e., sysvinit, upstart, systemd).
  41
  42 Luminous (12.2.z)
  43 -----------------
  44
  45 +----------+----------+--------------------+--------------+---------+------------+
  46 | Distro   | Release  | Code Name          | Kernel       | Notes   | Testing    |
  47 +==========+==========+====================+==============+=========+============+
  48 | CentOS   | 7        | N/A                | linux-3.10.0 | 3       | B, I, C    |
  49 +----------+----------+--------------------+--------------+---------+------------+
  50 | Debian   | 8.0      | Jessie             | linux-3.16.0 | 1, 2    | B, I       |
  51 +----------+----------+--------------------+--------------+---------+------------+
  52 | Debian   | 9.0      | Stretch            | linux-4.9    | 1, 2    | B, I       |
  53 +----------+----------+--------------------+--------------+---------+------------+
  54 | Fedora   | 22       | N/A                | linux-3.14.0 |         | B, I       |
  55 +----------+----------+--------------------+--------------+---------+------------+
  56 | RHEL     | 7        | Maipo              | linux-3.10.0 |         | B, I       |
  57 +----------+----------+--------------------+--------------+---------+------------+
  58 | Ubuntu   | 14.04    | Trusty Tahr        | linux-3.13.0 |         | B, I, C    |
  59 +----------+----------+--------------------+--------------+---------+------------+
  60 | Ubuntu   | 16.04    | Xenial Xerus       | linux-4.4.0  | 3       | B, I, C    |
  61 +----------+----------+--------------------+--------------+---------+------------+
  62
  63
  64 Jewel (10.2.z)
  65 --------------
  66
  67 +----------+----------+--------------------+--------------+---------+------------+
  68 | Distro   | Release  | Code Name          | Kernel       | Notes   | Testing    |
  69 +==========+==========+====================+==============+=========+============+
  70 | CentOS   | 7        | N/A                | linux-3.10.0 | 3       | B, I, C    |
  71 +----------+----------+--------------------+--------------+---------+------------+
  72 | Debian   | 8.0      | Jessie             | linux-3.16.0 | 1, 2    | B, I       |
  73 +----------+----------+--------------------+--------------+---------+------------+
  74 | Fedora   | 22       | N/A                | linux-3.14.0 |         | B, I       |
  75 +----------+----------+--------------------+--------------+---------+------------+
  76 | RHEL     | 7        | Maipo              | linux-3.10.0 |         | B, I       |
  77 +----------+----------+--------------------+--------------+---------+------------+
  78 | Ubuntu   | 14.04    | Trusty Tahr        | linux-3.13.0 |         | B, I, C    |
  79 +----------+----------+--------------------+--------------+---------+------------+
  80
  81 Hammer (0.94.z)
  82 ---------------
  83
  84 +----------+----------+--------------------+--------------+---------+------------+
  85 | Distro   | Release  | Code Name          | Kernel       | Notes   | Testing    |
  86 +==========+==========+====================+==============+=========+============+
  87 | CentOS   | 6        | N/A                | linux-2.6.32 | 1, 2    |            |
  88 +----------+----------+--------------------+--------------+---------+------------+
  89 | CentOS   | 7        | N/A                | linux-3.10.0 |         | B, I, C    |
  90 +----------+----------+--------------------+--------------+---------+------------+
  91 | Debian   | 7.0      | Wheezy             | linux-3.2.0  | 1, 2    |            |
  92 +----------+----------+--------------------+--------------+---------+------------+
  93 | Ubuntu   | 12.04    | Precise Pangolin   | linux-3.2.0  | 1, 2    |            |
  94 +----------+----------+--------------------+--------------+---------+------------+
  95 | Ubuntu   | 14.04    | Trusty Tahr        | linux-3.13.0 |         | B, I, C    |
  96 +----------+----------+--------------------+--------------+---------+------------+
  97
  98 Firefly (0.80.z)
  99 ----------------
 100
 101 +----------+----------+--------------------+--------------+---------+------------+
 102 | Distro   | Release  | Code Name          | Kernel       | Notes   | Testing    |
 103 +==========+==========+====================+==============+=========+============+
 104 | CentOS   | 6        | N/A                | linux-2.6.32 | 1, 2    | B, I       |
 105 +----------+----------+--------------------+--------------+---------+------------+
 106 | CentOS   | 7        | N/A                | linux-3.10.0 |         | B          |
 107 +----------+----------+--------------------+--------------+---------+------------+
 108 | Debian   | 7.0      | Wheezy             | linux-3.2.0  | 1, 2    | B          |
 109 +----------+----------+--------------------+--------------+---------+------------+
 110 | Fedora   | 19       | Schrödinger's Cat  | linux-3.10.0 |         | B          |
 111 +----------+----------+--------------------+--------------+---------+------------+
 112 | Fedora   | 20       | Heisenbug          | linux-3.14.0 |         | B          |
 113 +----------+----------+--------------------+--------------+---------+------------+
 114 | RHEL     | 6        | Santiago           | linux-2.6.32 | 1, 2    | B, I, C    |
 115 +----------+----------+--------------------+--------------+---------+------------+
 116 | RHEL     | 7        | Maipo              | linux-3.10.0 |         | B, I, C    |
 117 +----------+----------+--------------------+--------------+---------+------------+
 118 | Ubuntu   | 12.04    | Precise Pangolin   | linux-3.2.0  | 1, 2    | B, I, C    |
 119 +----------+----------+--------------------+--------------+---------+------------+
 120 | Ubuntu   | 14.04    | Trusty Tahr        | linux-3.13.0 |         | B, I, C    |
 121 +----------+----------+--------------------+--------------+---------+------------+
 122
 123 Notes
 124 -----
 125
 126 - **1**: The default kernel has an older version of ``btrfs`` that we do not
 127   recommend for ``ceph-osd`` storage nodes.  We recommend using ``XFS``.
 128
 129 - **2**: The default kernel has an old Ceph client that we do not recommend
 130   for kernel client (kernel RBD or the Ceph file system).  Upgrade to a
 131   recommended kernel.
 132
 133 - **3**: The default kernel regularly fails in QA when the ``btrfs``
 134   file system is used.  We do not recommend using ``btrfs`` for
 135   backing Ceph OSDs.
 136
 137
 138 Testing
 139 -------
 140
 141 - **B**: We build release packages for this platform. For some of these
 142   platforms, we may also continuously build all ceph branches and exercise
 143   basic unit tests.
 144
 145 - **I**: We do basic installation and functionality tests of releases on this
 146   platform.
 147
 148 - **C**: We run a comprehensive functional, regression, and stress test suite
 149   on this platform on a continuous basis. This includes development branches,
 150   pre-release, and released code.
 151
 152 .. _CRUSH Tunables: ../../rados/operations/crush-map#tunables
 153
 154 .. _CephFS best practices: ../../cephfs/best-practices