Ceph is a distributed object, block, and file storage platform
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Sage Weil b79442efce osd/PG: align past_intervals and last_epoch_clean for fabricated merge target
When we are fabricating a merge target, we have to construct a
meaningful pg_history_t and PastIntervals.  We do this with
pieces of the source PG and the last_epoch_clean and
last_epoch_started values from the pg_pool_t.  This usually
works, except when

 - source and target become clean, and we decrement pg_num
 - OSD mapping changes (for source and target)
 - source repeers, but target does not
 - OSD with source only tries to merge

In this case, the source will have a past_intervals start that is
later than the last_epoch_clean implied in the pg_pool_t.

This situation is harmless because we do not allow the actual
mappings of source and target to diverge during the merge window,
so if the source's past intervals was adjusted we can still use
it.  Avoid logging errors by adjusting the start epoch backwards.

Fixes: http://tracker.ceph.com/issues/37511
Signed-off-by: Sage Weil <sage@redhat.com>
2018-12-20 08:59:55 -06:00
.github .github/stale.yml: configure probot/stale to automatically close stale issues 2018-10-15 17:37:03 -05:00
admin doc: show edit on github links and version warnings 2018-11-02 14:49:15 -07:00
alpine auth: Kerberos authentication 2018-12-03 18:55:46 -07:00
bin scripts: fix bash path in shebangs (part 2) 2017-09-25 17:20:40 -06:00
ceph-erasure-code-corpus@2d7d78b9cc tests: erasure-code: add k=2, m=2 for isa & jerasure 2016-12-08 12:44:21 +01:00
ceph-menv ceph-menv: mrun shell environment 2018-05-21 13:51:16 -07:00
ceph-object-corpus@e32bf8ca3d ceph-object-corpus: update to fix make check 2018-04-05 10:50:32 -07:00
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doc Merge pull request #23298 from yehudasa/wip-rgw-ps-3 2018-12-14 12:52:39 -05:00
etc cmake: only create sysctl file on linux 2017-11-20 15:45:03 +08:00
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man man: skip directive starting with ".." 2018-08-15 13:28:54 +08:00
mirroring doc: remove CZ mirror 2018-05-04 10:46:14 +02:00
monitoring/grafana cmake: Support grafana dashboard installation 2018-10-25 17:09:02 +02:00
qa Merge pull request #25483 from dzafman/wip-hashinfo 2018-12-17 09:38:42 -08:00
selinux igw: Add selinux support for ceph iscsi 2018-11-05 13:05:19 -06:00
share ceph-post-file: migrate to RSA SSH keys 2016-08-22 10:27:36 -04:00
src osd/PG: align past_intervals and last_epoch_clean for fabricated merge target 2018-12-20 08:59:55 -06:00
sudoers.d sudoers.d/ceph-osd-smartctl: allow user ceph to run smartctl as root 2018-06-27 15:13:11 -05:00
systemd systemd: enable ceph-rbd-mirror.target 2018-11-05 18:58:43 +01:00
udev udev: remove parttypeuuid rules for ceph-disk 2018-06-13 15:16:22 -04:00
.gitattributes githubmap: define merge conflict resolution 2017-10-10 12:06:34 -07:00
.githubmap Merge PR #24874 into master 2018-11-19 17:31:19 -06:00
.gitignore mgr/dashboard: Ignore .idea directory (created by PyCharm for example) 2018-09-25 10:18:21 +02:00
.gitmodule_mirrors Replace gmock/gtest with googletest 2016-07-12 17:18:09 -07:00
.gitmodules fmt: remove fmt submodule 2018-12-17 21:05:05 +08:00
.mailmap mailmap,orgnization: Update sangfor affiliation 2018-11-26 17:03:14 +08:00
.organizationmap mailmap,orgnization: Update sangfor affiliation 2018-11-26 17:03:14 +08:00
.peoplemap mailmap: update affiliation for Mykola Golub 2017-12-24 16:49:38 +02:00
AUTHORS AUTHORS: Update Component Technical Leads and maintainers to canonical location of ceph.com. 2017-10-18 18:48:37 +08:00
ceph.spec.in Merge PR #25402 into master 2018-12-12 14:00:52 -06:00
CMakeLists.txt auth: Kerberos authentication 2018-12-03 18:55:46 -07:00
CodingStyle mgr/dashboard: Add reference to prettier in CodingStyle 2018-07-26 13:38:12 +01:00
CONTRIBUTING.rst doc: Fixes a typo. 2017-03-15 13:10:27 -05:00
COPYING Separate diskprediction local plugin from the diskprediction plugin 2018-11-05 14:09:10 +08:00
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COPYING-LGPL2.1 COPYING: note licenses for all files, not just the default 2012-01-12 10:03:27 -08:00
do_cmake.sh do_cmake: Warn user about slow debug performance by default. 2018-12-12 12:09:57 -06:00
do_freebsd.sh build: FreeBSD allow kv_store tools to be build 2018-11-28 14:49:02 +01:00
doc_deps.deb.txt admin/build-doc: use doc_deps.deb.txt for build-deps instead 2016-05-24 14:08:11 +08:00
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SubmittingPatches.rst SubmittingPatches: fix the spelling error 2018-05-31 20:35:39 +08:00

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 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.

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:

./install-deps.sh

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 3.5.1

Build instructions:

./do_cmake.sh
cd build
make

(Note: do_cmake.sh now defaults to creating a debug build of ceph that can be up to 5x slower with some workloads. Please pass "-DCMAKE_BUILD_TYPE=RelWithDebInfo" to do_cmake.sh to create a non-debug release.)

This assumes you make your build dir a subdirectory of the ceph.git checkout. If you put it elsewhere, just replace .. in do_cmake.sh with a correct path to the checkout. Any additional CMake args can be specified setting ARGS before invoking do_cmake. See cmake options for more details. Eg.

ARGS="-DCMAKE_C_COMPILER=gcc-7" ./do_cmake.sh

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

./make-dist

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 --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,

../src/stop.sh

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
make
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.)

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
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

Prerequisites

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:

admin/build-doc