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Getting Started
- One or more x86-64 machines.
- Linux kernel 2.6.27 or later
- glibc 2.9 or later
- The corosync and corosync lib package.
- QEMU 0.13 or later
- GNU Autotools
- pkg-config
- corosync devel package
- git (when compiling from source repo)
- svn (when compiling from source repo)
- nss devel packages (when compiling corosync from source)
Nearly every modern Linux distribution has x86_64 corosync binaries pre-built available via their repositories. We recommend you use these packages if they are available on your distribution.
For debian package based systems:
$ sudo aptitude install corosync libcorosync-dev
For RPM package based systems:
$ sudo yum install corosynclib-devel
If your distribution doesn't provide the corosync packages, or you prefer to compile from source:
$ svn co http://svn.fedorahosted.org/svn/corosync/branches/flatiron $ cd flatiron $ ./autogen.sh $ ./configure $ sudo make install $ cd ..
See also: Corosync Config
QEMU 0.13 provides built-in support for sheepdog devices. Some distributions provide pre-built versions of this newer version of QEMU. If your distribution has an older version of QEMU or you prefer to compile from source, retrieve the latest QEMU and compile:
$ git clone git://git.sv.gnu.org/qemu.git $ cd qemu $ ./configure $ sudo make install $ cd ..
$ git clone git://sheepdog.git.sf.net/gitroot/sheepdog/sheepdog $ cd sheepdog $ ./autogen.sh $ ./configure $ sudo make install $ cd ..
Please note, sheepdog supports a "make rpm" target which will generate an rpm package that can be installed on the local machine. To use this installation method, use the following instructions:
$ git clone git://sheepdog.git.sf.net/gitroot/sheepdog/sheepdog $ cd sheepdog $ ./autogen.sh $ ./configure $ make rpm $ sudo rpm -ivh x86_64/sheepdog-0.* $ cd ..
- Launch the sheepdog daemon on each machines of the cluster.
$ sheep /store_dir
/store_dir is a directory to store objects. The directory must be on the filesystem with an xattr support. In case of ext3, you need to add 'user_xattr' to the mount options.
$ sudo mount -o remount,user_xattr /store_device
- Format sheepdog cluster
$ collie cluster format --copies=3
"--copies" specifies the number of default data redundancy. In this case, the replicated data will be stored on three machines.
- Check cluster state
Following list shows that Sheepdog is running on 32 nodes.
$ collie node list Idx Node id (FNV-1a) - Host:Port ------------------------------------------------ 0 0308164db75cff7e - 10.68.13.15:7000 1 03104d8b4315c8e4 - 10.68.13.1:7000 2 0ab18c565bc14aea - 10.68.13.3:7000 3 0c0d27f0ac395f5d - 10.68.13.16:7000 4 127ee4802991f308 - 10.68.13.13:7000 5 135ff2beab2a9809 - 10.68.14.5:7000 6 17bd6240eab65870 - 10.68.14.4:7000 7 1cf35757cbf47d7b - 10.68.13.10:7000 8 1df9580b8960a992 - 10.68.13.11:7000 9 29307d3fa5a04f78 - 10.68.14.12:7000 10 29dcb3474e31d4f3 - 10.68.14.15:7000 11 29e089c98dd2a144 - 10.68.14.16:7000 12 2a118b7e2738f479 - 10.68.13.4:7000 13 3d6aea26ba79d75f - 10.68.13.6:7000 14 42f9444ead801767 - 10.68.14.11:7000 15 562c6f38283d09fe - 10.68.14.2:7000 16 5dd5e540cca1556a - 10.68.14.6:7000 17 6c12a5d10f10e291 - 10.68.14.13:7000 18 6dae1d955ca72d96 - 10.68.13.7:7000 19 711db0f5fa40b412 - 10.68.14.14:7000 20 7c6b95212ee7c085 - 10.68.14.9:7000 21 7d010c31bf11df73 - 10.68.13.2:7000 22 82c43e908b1f3f01 - 10.68.13.12:7000 23 931d2de0aaf61cf5 - 10.68.13.8:7000 24 961d9d391e6021e7 - 10.68.13.14:7000 25 9a3ef6fa1081026c - 10.68.13.9:7000 26 b0b3d300fed8bc26 - 10.68.14.10:7000 27 b0f08fb98c8f5edc - 10.68.14.8:7000 28 b9cc316dc5aba880 - 10.68.13.5:7000 29 d9eda1ec29c2eeeb - 10.68.14.7:7000 30 e53cebb2617c86fd - 10.68.14.1:7000 31 ea46913c4999ccdf - 10.68.14.3:7000
- Create a 256 GB virtual machine image of Alice.
$ qemu-img create sheepdog:Alice 256G
- You can also convert from existing KVM images to Sheepdog ones.
$ qemu-img convert ~/amd64.raw sheepdog:Bob
- See Sheepdog images by the following command.
$ collie vdi list name id size used shared creation time object id -------------------------------------------------------------------- Bob 0 2.0 GB 1.6 GB 0.0 MB 2010-03-23 16:16 80000 Alice 0 256 GB 0.0 MB 0.0 MB 2010-03-23 16:16 40000
- Boot the virtual machine.
$ qemu-system-x86_64 sheepdog:Alice
- Create a snapshot
$ qemu-img snapshot -c name sheepdog:Alice
- After getting snapshot, a new virtual machine images are added as a not-current image.
$ collie vdi list name id size used shared creation time object id -------------------------------------------------------------------- Bob 0 2.0 GB 1.6 GB 0.0 MB 2010-03-23 16:16 80000 Alice 0 256 GB 0.0 MB 0.0 MB 2010-03-23 16:21 c0000 s Alice 1 256 GB 0.0 MB 0.0 MB 2010-03-23 16:16 40000
- You can boot from the snapshot image by specifying snapshot id
$ qemu-system-x86_64 sheepdog:Alice:1
- Create a Charlie's image as a clone of Alice's image.
$ qemu-img create -b sheepdog:Alice:1 sheepdog:Charlie
- Charlie's image is added to the virtual machine list.
$ collie vdi list name id size used shared creation time object id -------------------------------------------------------------------- Bob 0 2.0 GB 1.6 GB 0.0 MB 2010-03-23 16:16 80000 Alice 0 256 GB 0.0 MB 0.0 MB 2010-03-23 16:21 c0000 s Alice 1 256 GB 0.0 MB 0.0 MB 2010-03-23 16:16 40000 Charlie 0 256 GB 0.0 MB 0.0 MB 2010-03-23 16:23 100000
- Run the shutdown command on the one of the cluster machines.
$ collie cluster shutdown
This command stops all the sheep processes on the cluster.
- Debian squeeze amd64