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179 lines
6.6 KiB
ReStructuredText
======================
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5-minute Quick Start
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======================
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Thank you for trying Ceph! Petabyte-scale data clusters are quite an
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undertaking. Before delving deeper into Ceph, we recommend setting up a two-node
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demo cluster to explore some of the functionality. The Ceph **5-Minute Quick
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Start** deploys a Ceph object store cluster on one server machine and a Ceph
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client on a separate machine, each with a recent Debian/Ubuntu operating system.
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The intent of this **Quick Start** is to help you exercise Ceph object store
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functionality without the configuration and deployment overhead associated with
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a production-ready object store cluster. Once you complete this quick start, you
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may exercise Ceph commands on the command line. You may also proceed to the
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quick start guides for block devices, CephFS filesystems, and the RESTful
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gateway.
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.. ditaa::
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/----------------\ /----------------\
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| Client Machine |<------->| Server Machine |
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| cCCC | | cCCC |
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+----------------+ +----------------+
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| Ceph Commands | | ceph - mon |
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+----------------+ +----------------+
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| Block Device | | ceph - osd |
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+----------------+ +----------------+
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| Ceph FS | | ceph - mds |
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\----------------/ \----------------/
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Install Debian/Ubuntu
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=====================
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Install a recent release of Debian or Ubuntu (e.g., 12.04 precise) on your
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Ceph server machine and your client machine.
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Add Ceph Packages
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=================
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To get the latest Ceph packages, add a release key to :abbr:`APT (Advanced
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Package Tool)`, add a source location to the ``/etc/apt/sources.list`` on your
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Ceph server and client machines, update your systems and install Ceph. ::
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wget -q -O- 'https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc' | sudo apt-key add -
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echo deb http://ceph.com/debian/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
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sudo apt-get update && sudo apt-get install ceph
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Check the Ceph version you are using and make a note of it so that you have the
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correct settings in your configuration file::
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ceph -v
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If ``ceph -v`` reflects an earlier version from what you installed, your
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``ceph-common`` library may be using the version distributed with the kernel.
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Once you've installed Ceph, you may also update and upgrade your packages to
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ensure you have the latest ``ceph-common`` library installed. ::
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sudo apt-get update && sudo apt-get upgrade
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If you want to use a version other than the current release, see `Installing
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Debian/Ubuntu Packages`_ for further details.
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.. _Installing Debian/Ubuntu Packages: ../../install/debian
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Add a Configuration File
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========================
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The example configuration file will configure Ceph to operate a monitor, two OSD
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daemons and one metadata server on your Ceph server machine. To add a
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configuration file to Ceph, we suggest copying the contents of the example file
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below to an editor. Then, follow the steps below to modify it.
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.. literalinclude:: ceph.conf
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:language: ini
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#. Open a command line on your Ceph server machine and execute ``hostname -s``
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to retrieve the name of your Ceph server machine.
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#. Replace ``{hostname}`` in the sample configuration file with your host name.
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#. Execute ``ifconfig`` on the command line of your Ceph server machine to
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retrieve the IP address of your Ceph server machine.
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#. Replace ``{ip-address}`` in the sample configuration file with the IP
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address of your Ceph server host.
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#. Save the contents to ``/etc/ceph/ceph.conf`` on Ceph server host.
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#. Copy the configuration file to ``/etc/ceph/ceph.conf`` on your client host. ::
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sudo scp {user}@{server-machine}:/etc/ceph/ceph.conf /etc/ceph/ceph.conf
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.. tip:: Ensure the ``ceph.conf`` file has appropriate permissions set
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(e.g. ``chmod 644``) on your client machine.
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.. versionadded:: 0.55
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Ceph v0.55 and above have authentication enabled by default. You should
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explicitly enable or disable authentication with version 0.55 and above.
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The example configuration provides ``auth`` entries for authentication.
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For details on Ceph authentication see `Cephx Configuration Reference`_
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and `Cephx Guide`_.
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.. _Cephx Guide: ../../rados/operations/authentication
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.. _Cephx Configuration Reference: ../../rados/configuration/auth-config-ref
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Deploy the Configuration
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========================
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You must perform the following steps to deploy the configuration.
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#. On your Ceph server host, create a directory for each daemon. For the
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example configuration, execute the following::
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sudo mkdir -p /var/lib/ceph/osd/ceph-0
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sudo mkdir -p /var/lib/ceph/osd/ceph-1
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sudo mkdir -p /var/lib/ceph/mon/ceph-a
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sudo mkdir -p /var/lib/ceph/mds/ceph-a
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#. Execute the following on the Ceph server host::
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cd /etc/ceph
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sudo mkcephfs -a -c /etc/ceph/ceph.conf -k ceph.keyring
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Among other things, ``mkcephfs`` will deploy Ceph and generate a
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``client.admin`` user and key. For Bobtail and subsequent versions (v 0.56 and
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after), the ``mkcephfs`` script will create and mount the filesystem for you
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provided you specify ``osd mkfs`` ``osd mount`` and ``devs`` settings in your
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Ceph configuration file.
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Start Ceph
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==========
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Once you have deployed the configuration, start Ceph from the command line of
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your server machine. ::
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sudo service ceph -a start
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Check the health of your Ceph cluster to ensure it is ready. ::
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sudo ceph health
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When your cluster echoes back ``HEALTH_OK``, you may begin using Ceph.
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Copy The Keyring to The Client
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==============================
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The next step you must perform is to copy ``/etc/ceph/ceph.keyring``, which
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contains the ``client.admin`` key, from the server machine to the client
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machine. If you don't perform this step, you will not be able to use the Ceph
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command line, as the example Ceph configuration requires authentication. ::
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sudo scp {user}@{server-machine}:/etc/ceph/ceph.keyring /etc/ceph/ceph.keyring
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.. tip:: Ensure the ``ceph.keyring`` file has appropriate permissions set
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(e.g., ``chmod 644``) on your client machine.
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Proceed to Other Quick Starts
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=============================
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Once you have Ceph running with both a client and a server, you
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may proceed to the other Quick Start guides.
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#. For Ceph block devices, proceed to `Block Device Quick Start`_.
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#. For the CephFS filesystem, proceed to `CephFS Quick Start`_.
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#. For the RESTful Gateway, proceed to `Gateway Quick Start`_.
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.. _Block Device Quick Start: ../quick-rbd
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.. _CephFS Quick Start: ../quick-cephfs
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.. _Gateway Quick Start: ../quick-rgw |