Ceph is a distributed object, block, and file storage platform
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Latest commit d22d6ca Oct 29, 2016 @dzafman dzafman committed on GitHub Merge pull request #11397 from dzafman/wip-scrub-misc
Reviewed-by: Kefu Chai <kchai@redhat.com>
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admin remove autotools Sep 7, 2016
bin make_dist.sh: rename from bin/make_dist_tarball.sh May 31, 2015
ceph-erasure-code-corpus @ b5c8634 erasure-code: improve non-regression testing Sep 29, 2016
ceph-object-corpus @ 47fbf8c Revert "common/*Formatters: Split Formatters" Jan 15, 2016
cmake/modules AArch64: Detect crc32 extension support from assembler Oct 10, 2016
debian build/ops: deb: add python dependencies where needed Oct 19, 2016
doc doc: Fixed mapping error in legacy mds command Oct 27, 2016
etc set 128MB tcmalloc cache size by bytes Apr 29, 2016
examples librados examples: link and include from current source tree by default. Mar 17, 2016
fusetrace remove superfluous second semicolons at end of lines May 8, 2014
keys new release key Sep 17, 2015
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mirroring doc: added new UK Ceph mirror to doc and mirroring Aug 1, 2016
qa Merge pull request #9304 from dzafman/wip-13937 Oct 28, 2016
selinux selinux: Allow ceph to manage tmp files Sep 29, 2016
share ceph-post-file: migrate to RSA SSH keys Aug 22, 2016
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systemd systemd: autogenerate ceph-mgr key during daemon startup Sep 29, 2016
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README README: symlink from README.md Aug 6, 2014
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do_cmake.sh do_freebsd.sh: Set options for debug building. Oct 12, 2016
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make-dist make-dist: set rpm_release correctly for release builds Oct 5, 2016
make-srpm.sh make-srpm.sh: A simple script to make the srpm for ceph. Sep 13, 2016
pom.xml update license for libcephfs Aug 26, 2014
run-make-check.sh run-make-check.sh: use cmake exclusively Oct 3, 2016


Ceph - a scalable distributed storage system

Please see http://ceph.com/ for current info.

Contributing Code

Most of Ceph is licensed under the LGPL version 2.1. Some miscellaneous code is under BSD-style license or is public domain. The documentation is licensed under Creative Commons Attribution-ShareAlike (CC BY-SA). There are a handful of headers included here that are licensed under the GPL. Please see the file COPYING for a full inventory of licenses by file.

Code contributions must include a valid "Signed-off-by" acknowledging the license for the modified or contributed file. Please see the file SubmittingPatches.rst for details on what that means and on how to generate and submit patches.

We do not require assignment of copyright to contribute code; code is contributed under the terms of the applicable license.

Checking out the source

You can clone from github with

git clone git@github.com:ceph/ceph

or, if you are not a github user,

git clone git://github.com/ceph/ceph

Ceph contains many git submodules that need to be checked out with

git submodule update --init --recursive

Build Prerequisites

The list of Debian or RPM packages dependencies can be installed with:


Building Ceph

Note that these instructions are meant for developers who are compiling the code for development and testing. To build binaries suitable for installation we recommend you build deb or rpm packages, or refer to the ceph.spec.in or debian/rules to see which configuration options are specified for production builds.

Prerequisite: CMake 2.8.11

Build instructions:

cd build

This assumes you make your build dir a subdirectory of the ceph.git checkout. If you put it elsewhere, just replace .. above with a correct path to the checkout.

To build only certain targets use:

    make [target name]

To install:

    make install

CMake Options

If you run the cmake command by hand, there are many options you can set with "-D". For example the option to build the RADOS Gateway is defaulted to ON. To build without the RADOS Gateway:

    cmake -DWITH_RADOSGW=OFF [path to top level ceph directory]

Another example below is building with debugging and alternate locations for a couple of external dependencies:

    cmake -DLEVELDB_PREFIX="/opt/hyperleveldb" -DOFED_PREFIX="/opt/ofed" \
    -DCMAKE_INSTALL_PREFIX=/opt/accelio -DCMAKE_C_FLAGS="-O0 -g3 -gdwarf-4" \

To view an exhaustive list of -D options, you can invoke cmake with:

    cmake -LH

If you often pipe make to less and would like to maintain the diagnostic colors for errors and warnings (and if your compiler supports it), you can invoke cmake with:

    cmake -DDIAGNOSTICS_COLOR=always ..

Then you'll get the diagnostic colors when you execute:

    make | less -R

Other available values for 'DIAGNOSTICS_COLOR' are 'auto' (default) and 'never'.

Building a source tarball

To build a complete source tarball with everything needed to build from source and/or build a (deb or rpm) package, run


This will create a tarball like ceph-$version.tar.bz2 from git. (Ensure that any changes you want to include in your working directory are committed to git.)

Running a test cluster

To run a functional test cluster,

cd build
make vstart        # builds just enough to run vstart
../src/vstart.sh -d -n -x -l
./bin/ceph -s

Almost all of the usual commands are available in the bin/ directory. For example,

./bin/rados -p rbd bench 30 write
./bin/rbd create foo --size 1000

To shut down the test cluster,


To start or stop individual daemons, the sysvinit script can be used:

./bin/init-ceph restart osd.0
./bin/init-ceph stop

Running unit tests

To build and run all tests (in parallel using all processors), use ctest:

cd build
ctest -j$(nproc)

(Note: Many targets built from src/test are not run using ctest. Targets starting with "unittest" are run in make check and thus can be run with ctest. Targets starting with "ceph_test" can not, and should be run by hand.)

To build and run all tests and their dependencies without other unnecessary targets in Ceph:

    cd build
    make check -j$(nproc)

To run an individual test manually, run ctest with -R (regex matching):

ctest -R [regex matching test name(s)]

(Note: ctest does not build the test it's running or the dependencies needed to run it)

To run an individual test manually and see all the tests output, run ctest with the -V (verbose) flag:

ctest -V -R [regex matching test name(s)]

To run an tests manually and run the jobs in parallel, run ctest with the -j flag:

ctest -j [number of jobs]

There are many other flags you can give ctest for better control over manual test execution. To view these options run:

man ctest

Building the Documentation


The list of package dependencies for building the documentation can be found in doc_deps.deb.txt:

sudo apt-get install `cat doc_deps.deb.txt`

Building the Documentation

To build the documentation, ensure that you are in the top-level `/ceph directory, and execute the build script. For example: