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https://github.com/ceph/ceph
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116 lines
5.1 KiB
ReStructuredText
116 lines
5.1 KiB
ReStructuredText
====================
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OS Recommendations
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====================
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Ceph Dependencies
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=================
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As a general rule, we recommend deploying Ceph on newer releases of Linux.
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Linux Kernel
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------------
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- **Ceph Kernel Client:** We currently recommend:
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- v3.6.6 or later in the v3.6 stable series
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- v3.4.20 or later in the v3.4 stable series
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- **btrfs**: If you use the ``btrfs`` file system with Ceph, we recommend using
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a recent Linux kernel (v3.5 or later).
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glibc
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-----
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- **syncfs(2)**: For non-btrfs filesystems such as XFS and ext4 where
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more than one ``ceph-osd`` daemon is used on a single server, Ceph
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performs signficantly better with the ``syncfs(2)`` system call
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(added in kernel 2.6.39 and glibc 2.14).
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Platforms
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=========
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The charts below show how Ceph's requirements map onto various Linux
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platforms. Generally speaking, there is very little dependence on
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specific distributions aside from the kernel and system initialization
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package (i.e., sysvinit, upstart, systemd).
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Argonaut (0.48)
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---------------
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+----------+----------+--------------------+--------------+---------+------------+
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| Distro | Release | Code Name | Kernel | Notes | Testing |
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+==========+==========+====================+==============+=========+============+
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| Ubuntu | 11.04 | Natty Narwhal | linux-2.6.38 | 1, 2, 3 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Ubuntu | 11.10 | Oneric Ocelot | linux-3.0.0 | 1, 2, 3 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C |
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+----------+----------+--------------------+--------------+---------+------------+
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| Ubuntu | 12.10 | Quantal Quetzal | linux-3.5.4 | 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Debian | 6.0 | Squeeze | linux-2.6.32 | 1, 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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Bobtail (0.55)
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--------------
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+----------+----------+--------------------+--------------+---------+------------+
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| Distro | Release | Code Name | Kernel | Notes | Testing |
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+==========+==========+====================+==============+=========+============+
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| Ubuntu | 11.04 | Natty Narwhal | linux-2.6.38 | 1, 2, 3 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Ubuntu | 11.10 | Oneric Ocelot | linux-3.0.0 | 1, 2, 3 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C |
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+----------+----------+--------------------+--------------+---------+------------+
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| Ubuntu | 12.10 | Quantal Quetzal | linux-3.5.4 | 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Debian | 6.0 | Squeeze | linux-2.6.32 | 1, 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| CentOS | 6.3 | N/A | linux-2.6.32 | 1, 2, 3 | B, I |
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+----------+----------+--------------------+--------------+---------+------------+
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| Fedora | 17.0 | Beefy Miracle | linux-3.3.4 | 1, 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| Fedora | 18.0 | Spherical Cow | linux-3.6.0 | | B |
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+----------+----------+--------------------+--------------+---------+------------+
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| OpenSuse | 12.2 | N/A | linux-3.4.0 | 2 | B |
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+----------+----------+--------------------+--------------+---------+------------+
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Notes
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-----
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- **1**: The default kernel has an older version of ``btrfs`` that we do not
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recommend for ``ceph-osd`` storage nodes. Upgrade to a recommended
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kernel or use ``XFS`` or ``ext4``.
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- **2**: The default kernel has an old Ceph client that we do not recommend
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for kernel client (kernel RBD or the Ceph file system). Upgrade to a
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recommended kernel.
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- **3**: The installed version of ``glibc`` does not support the
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``syncfs(2)`` system call. Putting multiple ``ceph-osd`` daemons
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using ``XFS`` or ``ext4`` on the same host will not perform as well as
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they could.
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Testing
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-------
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- **B**: We continuously build all branches on this platform and exercise basic
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unit tests. We build release packages for this platform.
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- **I**: We do basic installation and functionality tests of releases on this
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platform.
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- **C**: We run a comprehensive functional, regression, and stress test suite
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on this platform on a continuous basis. This includes development branches,
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pre-release, and released code.
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