mirror of
https://github.com/ceph/ceph
synced 2024-12-16 08:26:25 +00:00
124 lines
3.6 KiB
ReStructuredText
124 lines
3.6 KiB
ReStructuredText
=======================================
|
|
mkcephfs -- create a ceph file system
|
|
=======================================
|
|
|
|
.. program:: mkcephfs
|
|
|
|
Synopsis
|
|
========
|
|
|
|
| **mkcephfs** [ -c *ceph.conf* ] [ --mkbtrfs ] [ -a, --all-hosts [ -k
|
|
*/path/to/admin.keyring* ] ]
|
|
|
|
|
|
Description
|
|
===========
|
|
|
|
**mkcephfs** is used to create an empty Ceph file system, possibly
|
|
spanning multiple hosts. The ceph.conf file describes the composition
|
|
of the entire Ceph cluster, including which hosts are participating,
|
|
which daemons run where, and which paths are used to store file system
|
|
data or metadata.
|
|
|
|
The mkcephfs tool can be used in two ways. If -a is used, it will use
|
|
ssh and scp to connect to remote hosts on your behalf and do the setup
|
|
of the entire cluster. This is the easiest solution, but can also be
|
|
inconvenient (if you don't have ssh to connect without prompting for
|
|
passwords) or slow (if you have a large cluster).
|
|
|
|
Alternatively, you can run each setup phase manually. First, you need
|
|
to prepare a monmap that will be shared by each node::
|
|
|
|
# prepare
|
|
master# mkdir /tmp/foo
|
|
master# mkcephfs -c /etc/ceph/ceph.conf \
|
|
--prepare-monmap -d /tmp/foo
|
|
|
|
Share the ``/tmp/foo`` directory with other nodes in whatever way is
|
|
convenient for you. On each OSD and MDS node::
|
|
|
|
osdnode# mkcephfs --init-local-daemons osd -d /tmp/foo
|
|
mdsnode# mkcephfs --init-local-daemons mds -d /tmp/foo
|
|
|
|
Collect the contents of the /tmp/foo directories back onto a single
|
|
node, and then::
|
|
|
|
master# mkcephfs --prepare-mon -d /tmp/foo
|
|
|
|
Finally, distribute ``/tmp/foo`` to all monitor nodes and, on each of
|
|
those nodes::
|
|
|
|
monnode# mkcephfs --init-local-daemons mon -d /tmp/foo
|
|
|
|
|
|
Options
|
|
=======
|
|
|
|
.. option:: -a, --allhosts
|
|
|
|
Performs the necessary initialization steps on all hosts in the
|
|
cluster, executing commands via SSH.
|
|
|
|
.. option:: -c ceph.conf, --conf=ceph.conf
|
|
|
|
Use the given conf file instead of the default ``/etc/ceph/ceph.conf``.
|
|
|
|
.. option:: -k /path/to/keyring
|
|
|
|
When ``-a`` is used, we can specify a location to copy the
|
|
client.admin keyring, which is used to administer the cluster. The
|
|
default is ``/etc/ceph/keyring`` (or whatever is specified in the
|
|
config file).
|
|
|
|
.. option:: --mkbtrfs
|
|
|
|
Create and mount the any btrfs file systems specified in the
|
|
ceph.conf for OSD data storage using mkfs.btrfs. The "btrfs devs"
|
|
and (if it differs from "osd data") "btrfs path" options must be
|
|
defined.
|
|
|
|
.. option:: --no-copy-conf
|
|
|
|
By default, mkcephfs with -a will copy the new configuration to
|
|
/etc/ceph/ceph.conf on each node in the cluster. This option
|
|
disables that behavior.
|
|
|
|
Subcommands
|
|
===========
|
|
|
|
The sub-commands performed during cluster setup can be run individually with
|
|
|
|
.. option:: --prepare-monmap -d dir -c ceph.conf
|
|
|
|
Create an initial monmap with a random fsid/uuid and store it and
|
|
the ceph.conf in dir.
|
|
|
|
.. option:: --init-local-daemons type -d dir
|
|
|
|
Initialize any daemons of type type on the local host using the
|
|
monmap in dir. For types osd and mds, the resulting authentication
|
|
keys will be placed in dir. For type mon, the initial data files
|
|
generated by --prepare-mon (below) are expected in dir.
|
|
|
|
.. option:: --prepare-mon -d dir
|
|
|
|
Prepare the initial monitor data based on the monmap, OSD, and MDS
|
|
authentication keys collected in dir, and put the result in dir.
|
|
|
|
|
|
Availability
|
|
============
|
|
|
|
**mkcephfs** is part of the Ceph distributed file system. Please refer
|
|
to the Ceph wiki at http://ceph.newdream.net/wiki for more
|
|
information.
|
|
|
|
|
|
See also
|
|
========
|
|
|
|
:doc:`ceph <ceph>`\(8),
|
|
:doc:`monmaptool <monmaptool>`\(8),
|
|
:doc:`osdmaptool <osdmaptool>`\(8),
|
|
:doc:`crushtool <crushtool>`\(8)
|