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diff --git a/src/ceph/doc/start/os-recommendations.rst b/src/ceph/doc/start/os-recommendations.rst new file mode 100644 index 0000000..3aea814 --- /dev/null +++ b/src/ceph/doc/start/os-recommendations.rst @@ -0,0 +1,154 @@ +==================== + OS Recommendations +==================== + +Ceph Dependencies +================= + +As a general rule, we recommend deploying Ceph on newer releases of Linux. +We also recommend deploying on releases with long-term support. + +Linux Kernel +------------ + +- **Ceph Kernel Client** + + If you are using the kernel client to map RBD block devices or mount + CephFS, the general advice is to use a "stable" or "longterm + maintenance" kernel series provided by either http://kernel.org or + your Linux distribution on any client hosts. + + For RBD, if you choose to *track* long-term kernels, we currently recommend + 4.x-based "longterm maintenance" kernel series: + + - 4.9.z + - 4.4.z + + For CephFS, see `CephFS best practices`_ for kernel version guidance. + + Older kernel client versions may not support your `CRUSH tunables`_ profile + or other newer features of the Ceph cluster, requiring the storage cluster + to be configured with those features disabled. + + +Platforms +========= + +The charts below show how Ceph's requirements map onto various Linux +platforms. Generally speaking, there is very little dependence on +specific distributions aside from the kernel and system initialization +package (i.e., sysvinit, upstart, systemd). + +Luminous (12.2.z) +----------------- + ++----------+----------+--------------------+--------------+---------+------------+ +| Distro | Release | Code Name | Kernel | Notes | Testing | ++==========+==========+====================+==============+=========+============+ +| CentOS | 7 | N/A | linux-3.10.0 | 3 | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ +| Debian | 8.0 | Jessie | linux-3.16.0 | 1, 2 | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| Debian | 9.0 | Stretch | linux-4.9 | 1, 2 | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| Fedora | 22 | N/A | linux-3.14.0 | | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| RHEL | 7 | Maipo | linux-3.10.0 | | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| Ubuntu | 14.04 | Trusty Tahr | linux-3.13.0 | | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ +| Ubuntu | 16.04 | Xenial Xerus | linux-4.4.0 | 3 | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ + + +Jewel (10.2.z) +-------------- + ++----------+----------+--------------------+--------------+---------+------------+ +| Distro | Release | Code Name | Kernel | Notes | Testing | ++==========+==========+====================+==============+=========+============+ +| CentOS | 7 | N/A | linux-3.10.0 | 3 | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ +| Debian | 8.0 | Jessie | linux-3.16.0 | 1, 2 | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| Fedora | 22 | N/A | linux-3.14.0 | | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| RHEL | 7 | Maipo | linux-3.10.0 | | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| Ubuntu | 14.04 | Trusty Tahr | linux-3.13.0 | | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ + +Hammer (0.94.z) +--------------- + ++----------+----------+--------------------+--------------+---------+------------+ +| Distro | Release | Code Name | Kernel | Notes | Testing | ++==========+==========+====================+==============+=========+============+ +| CentOS | 6 | N/A | linux-2.6.32 | 1, 2 | | ++----------+----------+--------------------+--------------+---------+------------+ +| CentOS | 7 | N/A | linux-3.10.0 | | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ +| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | | ++----------+----------+--------------------+--------------+---------+------------+ +| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | | ++----------+----------+--------------------+--------------+---------+------------+ +| Ubuntu | 14.04 | Trusty Tahr | linux-3.13.0 | | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ + +Firefly (0.80.z) +---------------- + ++----------+----------+--------------------+--------------+---------+------------+ +| Distro | Release | Code Name | Kernel | Notes | Testing | ++==========+==========+====================+==============+=========+============+ +| CentOS | 6 | N/A | linux-2.6.32 | 1, 2 | B, I | ++----------+----------+--------------------+--------------+---------+------------+ +| CentOS | 7 | N/A | linux-3.10.0 | | B | ++----------+----------+--------------------+--------------+---------+------------+ +| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | B | ++----------+----------+--------------------+--------------+---------+------------+ +| Fedora | 19 | Schrödinger's Cat | linux-3.10.0 | | B | ++----------+----------+--------------------+--------------+---------+------------+ +| Fedora | 20 | Heisenbug | linux-3.14.0 | | B | ++----------+----------+--------------------+--------------+---------+------------+ +| RHEL | 6 | Santiago | linux-2.6.32 | 1, 2 | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ +| RHEL | 7 | Maipo | linux-3.10.0 | | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ +| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ +| Ubuntu | 14.04 | Trusty Tahr | linux-3.13.0 | | B, I, C | ++----------+----------+--------------------+--------------+---------+------------+ + +Notes +----- + +- **1**: The default kernel has an older version of ``btrfs`` that we do not + recommend for ``ceph-osd`` storage nodes. We recommend using ``XFS``. + +- **2**: The default kernel has an old Ceph client that we do not recommend + for kernel client (kernel RBD or the Ceph file system). Upgrade to a + recommended kernel. + +- **3**: The default kernel regularly fails in QA when the ``btrfs`` + file system is used. We do not recommend using ``btrfs`` for + backing Ceph OSDs. + + +Testing +------- + +- **B**: We build release packages for this platform. For some of these + platforms, we may also continuously build all ceph branches and exercise + basic unit tests. + +- **I**: We do basic installation and functionality tests of releases on this + platform. + +- **C**: We run a comprehensive functional, regression, and stress test suite + on this platform on a continuous basis. This includes development branches, + pre-release, and released code. + +.. _CRUSH Tunables: ../../rados/operations/crush-map#tunables + +.. _CephFS best practices: ../../cephfs/best-practices |