Ceph is a distributed object, block, and file storage platform
Please see http://ceph.com/ for current info.
Most of Ceph is dual licensed under the LGPL version 2.1 or 3.0. Some miscellaneous code is under a BSD-style license or is public domain. The documentation is licensed under Creative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0). 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.
You can clone from github with
git clone [email protected]: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
The list of Debian or RPM packages dependencies can be installed with:
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
debian/rulesto see which configuration options are specified for production builds.
./do_cmake.sh cd build ninja
(docmake.sh now defaults to creating a debug build of ceph that can be up to 5x slower with some workloads. Please pass "-DCMAKEBUILDTYPE=RelWithDebInfo" to docmake.sh to create a non-debug release.
The number of jobs used by
ninjais derived from the number of CPU cores of the building host if unspecified. Use the
-joption to limit the job number if the build jobs are running out of memory. On average, each job takes around 2.5GiB memory.)
This assumes you make your build dir a subdirectory of the ceph.git checkout. If you put it elsewhere, just point
CEPH_GIT_DIRto the correct path to the checkout. Any additional CMake args can be specified by setting ARGS before invoking do_cmake. See cmake options for more details. Eg.
To build only certain targets use:
ninja [target name]
If you run the
cmakecommand 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" \ -DCMAKE_INSTALL_PREFIX=/opt/ceph -DCMAKE_C_FLAGS="-Og -g3 -gdwarf-4" \ ..
To view an exhaustive list of -D options, you can invoke
If you often pipe
lessand would like to maintain the diagnostic colors for errors and warnings (and if your compiler supports it), you can invoke
cmake -DDIAGNOSTICS_COLOR=always ...
Then you'll get the diagnostic colors when you execute:
ninja | less -R
Other available values for 'DIAGNOSTICS_COLOR' are 'auto' (default) and 'never'.
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-$version.tar.bz2 from git. (Ensure that any changes you want to include in your working directory are committed to git.)
To run a functional test cluster,
cd build ninja vstart # builds just enough to run vstart ../src/vstart.sh --debug --new -x --localhost --bluestore ./bin/ceph -s
Almost all of the usual commands are available in the bin/ directory. For example,
./bin/rados -p rbd bench 30 write ./bin/rbd create foo --size 1000
To shut down the test cluster,
To start or stop individual daemons, the sysvinit script can be used:
./bin/init-ceph restart osd.0 ./bin/init-ceph stop
To build and run all tests (in parallel using all processors), use
cd build ninja ctest -j$(nproc)
(Note: Many targets built from src/test are not run using
ctest. Targets starting with "unittest" are run in
ninja checkand thus can be run with
ctest. Targets starting with "ceph_test" can not, and should be run by hand.)
When failures occur, look in build/Testing/Temporary for logs.
To build and run all tests and their dependencies without other unnecessary targets in Ceph:
cd build ninja check -j$(nproc)
To run an individual test manually, run
ctestwith -R (regex matching):
ctest -R [regex matching test name(s)]
ctestdoes 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
ctestwith the -V (verbose) flag:
ctest -V -R [regex matching test name(s)]
To run tests manually and run the jobs in parallel, run
ctest -j [number of jobs]
There are many other flags you can give
ctestfor better control over manual test execution. To view these options run:
The list of package dependencies for building the documentation can be found in
sudo apt-get install `cat doc_deps.deb.txt`
To build the documentation, ensure that you are in the top-level
/cephdirectory, and execute the build script. For example: