OS Recommendations¶
Ceph Dependencies¶
As a general rule, we recommend deploying Ceph on newer releases of Linux.
Linux Kernel¶
- Ceph Kernel Client: We currently recommend:
- v3.6.6 or later in the v3.6 stable series
- v3.4.20 or later in the v3.4 stable series
- btrfs: If you use the btrfs file system with Ceph, we recommend using a recent Linux kernel (v3.5 or later).
glibc¶
- syncfs(2): For non-btrfs filesystems such as XFS and ext4 where more than one ceph-osd daemon is used on a single server, Ceph performs signficantly better with the syncfs(2) system call (added in kernel 2.6.39 and glibc 2.14). New versions of Ceph (v0.55 and later) do not depend on glibc support.
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).
Emperor (0.72)¶
| Distro | Release | Code Name | Kernel | Notes | Testing |
|---|---|---|---|---|---|
| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C |
| Ubuntu | 12.10 | Quantal Quetzal | linux-3.5.4 | 2, 4 | B |
| Ubuntu | 13.04 | Raring Ringtail | linux-3.8.5 | 4 | B |
| Debian | 6.0 | Squeeze | linux-2.6.32 | 1, 2, 3 | B |
| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | B |
| CentOS | 6.3 | N/A | linux-2.6.32 | 1, 2 | B, I |
| RHEL | 6.3 | linux-2.6.32 | 1, 2 | B, I | |
| Fedora | 18.0 | Spherical Cow | linux-3.6.0 | B | |
| Fedora | 19.0 | Schrödinger’s Cat | linux-3.10.0 | B | |
| OpenSuse | 12.2 | N/A | linux-3.4.0 | 2 | B |
Dumpling (0.67)¶
| Distro | Release | Code Name | Kernel | Notes | Testing |
|---|---|---|---|---|---|
| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C |
| Ubuntu | 12.10 | Quantal Quetzal | linux-3.5.4 | 2 | B |
| Ubuntu | 13.04 | Raring Ringtail | linux-3.8.5 | B | |
| Debian | 6.0 | Squeeze | linux-2.6.32 | 1, 2, 3 | B |
| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | B |
| CentOS | 6.3 | N/A | linux-2.6.32 | 1, 2 | B, I |
| RHEL | 6.3 | linux-2.6.32 | 1, 2 | B, I | |
| Fedora | 18.0 | Spherical Cow | linux-3.6.0 | B | |
| Fedora | 19.0 | Schrödinger’s Cat | linux-3.10.0 | B | |
| OpenSuse | 12.2 | N/A | linux-3.4.0 | 2 | B |
Cuttlefish (0.61)¶
| Distro | Release | Code Name | Kernel | Notes | Testing |
|---|---|---|---|---|---|
| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C |
| Ubuntu | 12.10 | Quantal Quetzal | linux-3.5.4 | 2 | B |
| Ubuntu | 13.04 | Raring Ringtail | linux-3.8.5 | B | |
| Debian | 6.0 | Squeeze | linux-2.6.32 | 1, 2, 3 | B |
| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | B |
| CentOS | 6.3 | N/A | linux-2.6.32 | 1, 2 | B, I |
| RHEL | 6.3 | linux-2.6.32 | 1, 2 | B, I | |
| Fedora | 17.0 | Beefy Miracle | linux-3.3.4 | 1, 2 | B |
| Fedora | 18.0 | Spherical Cow | linux-3.6.0 | B | |
| OpenSuse | 12.2 | N/A | linux-3.4.0 | 2 | B |
Bobtail (0.56)¶
| Distro | Release | Code Name | Kernel | Notes | Testing |
|---|---|---|---|---|---|
| Ubuntu | 11.04 | Natty Narwhal | linux-2.6.38 | 1, 2, 3 | B |
| Ubuntu | 11.10 | Oneric Ocelot | linux-3.0.0 | 1, 2 | B |
| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C |
| Ubuntu | 12.10 | Quantal Quetzal | linux-3.5.4 | 2 | B |
| Debian | 6.0 | Squeeze | linux-2.6.32 | 1, 2, 3 | B |
| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2 | B |
| CentOS | 6.3 | N/A | linux-2.6.32 | 1, 2 | B, I |
| Fedora | 17.0 | Beefy Miracle | linux-3.3.4 | 1, 2 | B |
| Fedora | 18.0 | Spherical Cow | linux-3.6.0 | B | |
| OpenSuse | 12.2 | N/A | linux-3.4.0 | 2 | B |
Argonaut (0.48)¶
| Distro | Release | Code Name | Kernel | Notes | Testing |
|---|---|---|---|---|---|
| Ubuntu | 11.04 | Natty Narwhal | linux-2.6.38 | 1, 2, 3 | B |
| Ubuntu | 11.10 | Oneric Ocelot | linux-3.0.0 | 1, 2, 3 | B |
| Ubuntu | 12.04 | Precise Pangolin | linux-3.2.0 | 1, 2 | B, I, C |
| Ubuntu | 12.10 | Quantal Quetzal | linux-3.5.4 | 2 | B |
| Debian | 6.0 | Squeeze | linux-2.6.32 | 1, 2, 3 | B |
| Debian | 7.0 | Wheezy | linux-3.2.0 | 1, 2, 3 | B |
Notes¶
- 1: The default kernel has an older version of btrfs that we do not recommend for ceph-osd storage nodes. Upgrade to a recommended kernel or use XFS or ext4.
- 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 or installed version of glibc does not support the syncfs(2) system call. Putting multiple ceph-osd daemons using XFS or ext4 on the same host will not perform as well as they could.
- 4: Ceph provides ARM support for Quantal and Raring. Saucy support is not supported yet, but support is coming soon.
Testing¶
- B: We continuously build all branches on this platform and exercise basic unit tests. We build release packages for this platform.
- 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.
