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:
4.19.z
4.14.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).
Nautilus (14.2.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 |
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 |
Ubuntu |
18.04 |
Bionic Beaver |
linux-4.15 |
3 |
B, I, C |
openSUSE |
15.1 |
Leap |
linux-4.12 |
||
openSUSE |
Tumbleweed |
linux-5.1.7 |
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 |
Notes¶
1: The default kernel has an older version of
btrfsthat we do not recommend forceph-osdstorage nodes. We recommend usingXFS.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
btrfsfile system is used. We do not recommend usingbtrfsfor 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.
