mirror of
https://github.com/ceph/ceph
synced 2024-12-27 05:53:20 +00:00
67 lines
2.1 KiB
ReStructuredText
67 lines
2.1 KiB
ReStructuredText
==================
|
|
Create a Cluster
|
|
==================
|
|
|
|
The first step in using Ceph with ``ceph-deploy`` is to create a new Ceph
|
|
cluster. A new Ceph cluster has:
|
|
|
|
- A Ceph configuration file, and
|
|
- A monitor keyring.
|
|
|
|
The Ceph configuration file consists of at least:
|
|
|
|
- Its own filesystem ID (``fsid``)
|
|
- The initial monitor(s) hostname(s), and
|
|
- The initial monitor(s) and IP address(es).
|
|
|
|
For additional details, see the `Monitor Configuration Reference`_.
|
|
|
|
The ``ceph-deploy`` tool also creates a monitor keyring and populates it with a
|
|
``[mon.]`` key. For additional details, see the `Cephx Guide`_.
|
|
|
|
|
|
Usage
|
|
-----
|
|
|
|
To create a cluster with ``ceph-deploy``, use the ``new`` command and specify
|
|
the host(s) that will be initial members of the monitor quorum. ::
|
|
|
|
ceph-deploy new {host [host], ...}
|
|
|
|
For example::
|
|
|
|
ceph-deploy new mon1.foo.com
|
|
ceph-deploy new mon{1,2,3}
|
|
|
|
The ``ceph-deploy`` utility will use DNS to resolve hostnames to IP
|
|
addresses. The monitors will be named using the first component of
|
|
the name (e.g., ``mon1`` above). It will add the specified host names
|
|
to the Ceph configuration file. For additional details, execute::
|
|
|
|
ceph-deploy new -h
|
|
|
|
|
|
Naming a Cluster
|
|
----------------
|
|
|
|
By default, Ceph clusters have a cluster name of ``ceph``. You can specify
|
|
a cluster name if you want to run multiple clusters on the same hardware. For
|
|
example, if you want to optimize a cluster for use with block devices, and
|
|
another for use with the gateway, you can run two different clusters on the same
|
|
hardware if they have a different ``fsid`` and cluster name. ::
|
|
|
|
ceph-deploy --cluster {cluster-name} new {host [host], ...}
|
|
|
|
For example::
|
|
|
|
ceph-deploy --cluster rbdcluster new ceph-mon1
|
|
ceph-deploy --cluster rbdcluster new ceph-mon{1,2,3}
|
|
|
|
.. note:: If you run multiple clusters, ensure you adjust the default
|
|
port settings and open ports for your additional cluster(s) so that
|
|
the networks of the two different clusters don't conflict with each other.
|
|
|
|
|
|
.. _Monitor Configuration Reference: ../../configuration/mon-config-ref
|
|
.. _Cephx Guide: ../../operations/authentication#monitor-keyrings
|