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Developer Guide (Quick)

This guide will describe how to build and test Ceph for development.

Development

After installing the dependencies described in the README, prepare the git source tree by updating the submodules

git submodule update --init

To build the server daemons, and FUSE client, execute the following:

./do_autogen.sh -d 1
make -j [number of cpus]

Running a development deployment

Ceph contains a script called vstart.sh which allows developers to quickly test their code using a simple deployment on your development system. Once the build finishes successfully, start the ceph deployment using the following command:

$ cd src
$ ./vstart.sh -d -n -x

You can also configure vstart.sh to use only one monitor and one metadata server by using the following:

$ MON=1 MDS=1 ./vstart.sh -d -n -x

The system creates three pools on startup: cephfs_data, cephfs_metadata, and rbd. Let's get some stats on the current pools:

$ ./ceph osd pool stats
*** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
pool rbd id 0
  nothing is going on

pool cephfs_data id 1
  nothing is going on

pool cephfs_metadata id 2
  nothing is going on

$ ./ceph osd pool stats cephfs_data
*** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
pool cephfs_data id 1
  nothing is going on

$ ./rados df
pool name       category                 KB      objects       clones     degraded      unfound     rd        rd KB           wr        wr KB
rbd             -                          0            0            0            0     0            0            0            0            0
cephfs_data     -                          0            0            0            0     0            0            0            0            0
cephfs_metadata -                          2           20            0           40     0            0            0           21            8
  total used        12771536           20
  total avail     3697045460
  total space     3709816996

Make a pool and run some benchmarks against it:

$ ./rados mkpool mypool
$ ./rados -p mypool bench 10 write -b 123

Place a file into the new pool:

$ ./rados -p mypool put objectone <somefile>
$ ./rados -p mypool put objecttwo <anotherfile>

List the objects in the pool:

$ ./rados -p mypool ls

Once you are done, type the following to stop the development ceph deployment:

$ ./stop.sh

Running a RadosGW development environment

Add the -r to vstart.sh to enable the RadosGW

$ cd src
$ ./vstart.sh -d -n -x -r

You can now use the swift python client to communicate with the RadosGW.

$ swift -A http://localhost:8000/auth -U tester:testing -K asdf list
$ swift -A http://localhost:8000/auth -U tester:testing -K asdf upload mycontainer ceph
$ swift -A http://localhost:8000/auth -U tester:testing -K asdf list

Run unit tests

The tests are located in src/tests. To run them type:

$ make check