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https://github.com/ceph/ceph
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124 lines
4.5 KiB
Plaintext
124 lines
4.5 KiB
Plaintext
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Last updated: 2016-11-21
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The FreeBSD build will build most of the tools in Ceph.
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Note that the (kernel) RBD dependant items will not work since FreeBSD does not
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have RBD (yet)
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I started looking into Ceph, because the HAST solution with CARP and
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ggate did not really do what I was looking for. But I'm aiming for
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running a Ceph storage cluster on storage nodes that are running ZFS.
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In the end the cluster would be running bhyve on RBD disk that are stored in
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Ceph.
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Progress from last report:
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==========================
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Most important change:
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- All test run to completion for the current selection of
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tools. This is only the case for "My Fork" repository. Some of the
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commits need to be pulled into the HEAD
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- As of now Cmake is the only way of building Ceph
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- And testing would be best done thru ctest.
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- Reworked threading/polling code for the simple socket code.
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Now uses a selfpipe, instead of using an odd shutdown() signaling
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Linux feature.
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- Modified the EventKqueue code to work around the "feature" that
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starting threads destroys the the kqueue handles.
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- ceph-disk should now be able to support FileStore on a ZFS disk.
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The main reason that it needs to be ZFS is for xattribute: Size and number.
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Build Prerequisites
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===================
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Compiling and building Ceph is tested on 12-CURRENT, but I guess/expect
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11-RELEASE will also work. And Clang is at 3.8.0.
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It uses the CLANG toolset that is available, 3.7 is no longer tested,
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but was working when that was with 11-CURRENT.
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Clang 3.4 (on 10.2-STABLE) does not have all required capabilites to
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compile everything
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The following setup will get things running for FreeBSD:
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This all require root privilidges.
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- Install bash and link it in /bin
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sudo pkg install bash
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sudo ln -s /usr/local/bin/bash /bin/bash
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- Need to add one compatability line to
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/usr/include/errno.h
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#define ENODATA 87 /* Attribute not found */
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(Otherwise some cython compiles will fail.)
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- getopt is used by several testscripts but it requires more than what
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the native getopt(1) delivers. So best is to install getopt from ports
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and remove/replace the getopt in /usr/bin.
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Getting the FreeBSD work on Ceph:
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=================================
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- cd "place to work on this"
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git clone https://github.com/wjwithagen/ceph.git
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cd ceph
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git checkout wip-wjw-freebsd-cmake
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Building Ceph
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=============
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- Go and start building
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./do_freebsd.sh
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Parts not (yet) included:
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=========================
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- RBD
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Rados Block Devices is implemented in the Linux kernel
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It seems that there used to be a userspace implementation first.
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And perhaps ggated could be used as a template since it does some of
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the same, other than just between 2 disks. And it has a userspace
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counterpart.
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- BlueStore.
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FreeBSD and Linux have different AIO API, and that needs to be made
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compatible Next to that is there discussion in FreeBSD about
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aio_cancel not working for all devicetypes
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- CephFS
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Cython tries to access an internal field in dirent which does not
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compile
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Tests that verify the correct working of the above are also excluded
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from the testset
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Tests not (yet) include:
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=======================
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- None, although some test can fail if running tests in parallel and there is
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not enough swap. Then tests will start to fail in strange ways.
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Task to do:
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===========
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- Build an automated test platform that will build ceph/master on
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FreeBSD and report the results back to the Ceph developers. This will
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increase the maintainability of the FreeBSD side of things.
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Developers are signalled that they are using Linux-isms that will not
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compile/run on FreeBSD Ceph has several projects for this: Jenkins,
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teuthology, pulpito, ...
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But even just a while { compile } loop and report the build data on a
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static webpage would do for starters.
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- Run integration tests to see if the FreeBSD daemons will work with a
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Linux Ceph platform.
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- Compile and test the user space RBD (Rados Block Device).
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- Investigate and see if an in-kernel RBD device could be developed a la
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'ggate'
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- Investigate the keystore, which could be kernel embedded on Linux an
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currently prevents building Cephfs and some other parts.
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- Scheduler information is not used atm, because the schedulers work
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rather different. But at a certain point in time, this would need some
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attention:
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in: ./src/common/Thread.cc
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- Integrate the FreeBSD /etc/rc.d init scripts in the Ceph stack. Both
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for testing, but mainly for running Ceph on production machines.
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