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.TH "CEPH-DISK" "8" "November 26, 2014" "dev" "Ceph"
.SH NAME
ceph-disk \- Ceph disk preparation and activation utility for OSD
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.SH SYNOPSIS
.nf
\fBceph\-disk\fP \fBprepare\fP [\-\-cluster \fIclustername\fP] [\-\-cluster\-uuid \fIuuid\fP]
[\-\-fs\-type \fIxfs|ext4|btrfs\fP] [\fIdata\-path\fP] [\fIjournal\-path\fP]
.fi
.sp
.nf
\fBceph\-disk\fP \fBactivate\fP [\fIdata\-path\fP] [\-\-activate\-key \fIpath\fP]
.fi
.sp
.nf
\fBceph\-disk\fP \fBactivate\-all\fP
.fi
.sp
.nf
\fBceph\-disk\fP \fBlist\fP
.fi
.sp
.SH DESCRIPTION
.sp
\fBceph\-disk\fP is a utility that can prepare and activate a disk, partition or
directory as a ceph OSD. It is run directly or triggered by \fBceph\-deploy\fP
or udev.
.sp
It actually automates the multiple steps involved in manual creation and start
of an OSD into 2 steps of preparing and activating the OSD by using the
subcommands \fBprepare\fP and \fBactivate\fP\&.
.SH SUBCOMMANDS
.sp
\fBprepare\fP: Prepare a directory, disk or drive for a ceph OSD. It creates a GPT
partition, marks the partition with ceph type uuid, creates a file system, marks
the file system as ready for ceph consumption, uses entire partition and adds a
new partition to the journal disk. It is run directly or triggered by
\fBceph\-deploy\fP\&.
.sp
Usage: ceph\-disk prepare \-\-cluster [cluster\-name] \-\-cluster\-uuid [uuid] \-\-fs\-type
[ext4|xfs|btrfs] [data\-path] [journal\-path]
.sp
Other options like \-\-osd\-uuid, \-\-journal\-uuid, \-\-zap\-disk, \-\-data\-dir, \-\-data\-dev,
\-\-journal\-file, \-\-journal\-dev, \-\-dmcrypt and \-\-dmcrypt\-key\-dir can also be used
with the subcommand.
.sp
\fBactivate\fP: Activate the ceph OSD. It mounts the volume in a temporary
location, allocates an OSD id (if needed), remounts in the correct location
/var/lib/ceph/osd/$cluster\-$id and starts ceph\-osd. It is triggered by udev
when it sees the OSD GPT partition type or on ceph service start with
\(aqceph disk activate\-all\(aq. It is also run directly or triggered by \fBceph\-deploy\fP\&.
.sp
Usage: ceph\-disk activate [PATH]
.sp
Here, [PATH] is path to block device or directory.
.sp
An additional option [\-\-activate\-key PATH] has to be used with this subcommand
when a copy of /var/lib/ceph/bootstrap\-osd/{cluster}.keyring isn\(aqt present in the
OSD node.
.sp
Usage: ceph\-disk activate [PATH] [\-\-activate\-key PATH]
.sp
Another option \-\-mark\-init can also be used with this subcommand.
.sp
\fBactivate\-journal\fP: Activate an OSD via it\(aqs journal device. udev triggers
\(aqceph\-disk activate\-journal <dev>\(aq based on the partition type.
.sp
Usage: ceph\-disk activate\-journal [DEV]
.sp
Here, [DEV] is the path to journal block device.
.sp
Others options can also be used with this subcommand like \-\-activate\-key and
\-\-mark\-init.
.sp
Usage: ceph\-disk activate\-journal [\-\-activate\-key PATH] [\-\-mark\-init INITSYSTEM]
[DEV]
.sp
\fBactivate\-all\fP: Activate all tagged OSD partitions. activate\-all relies on
/dev/disk/by\-parttype\-uuid/$typeuuid.$uuid to find all partitions. Special udev
rules are installed to create these links. It is triggered on ceph service start
or run directly.
.sp
Usage: ceph\-disk activate\-all
.sp
Others options can also be used with this subcommand like \-\-activate\-key and
\-\-mark\-init.
.sp
Usage: ceph\-disk activate\-all [\-\-activate\-key PATH] [\-\-mark\-init INITSYSTEM]
.sp
\fBlist\fP: List disk partitions and ceph OSDs. It is run directly or triggered
by \fBceph\-deploy\fP\&.
.sp
Usage: ceph\-disk list
.sp
\fBsuppress\-activate\fP: Suppress activate on a device (prefix).
Mark devices that you want to suppress activate with a file like
/var/lib/ceph/tmp/suppress\-activate.sdb where the last bit is
the sanitized device name (/dev/X without the /dev/ prefix). A
function is_suppressed() checks for and  matches a prefix (/dev/).
It means suppressing sdb will stop activate on sdb1, sdb2, etc.
.sp
Usage: ceph\-disk suppress\-activate [PATH]
.sp
Here, [PATH] is path to block device or directory.
.sp
\fBunsuppress\-activate\fP: Stop suppressing activate on a device (prefix).
.sp
Usage: ceph\-disk unsuppress\-activate [PATH]
.sp
Here, [PATH] is path to block device or directory.
.sp
\fBzap\fP: Zap/erase/destroy a device\(aqs partition table and contents.
It actually uses \(aqsgdisk\(aq and it\(aqs option \(aq\-\-zap\-all\(aq to destroy both
GPT and MBR data structures so that the disk becomes suitable for
repartitioning. \(aqsgdisk\(aq then uses \(aq\-\-mbrtogpt\(aq to convert the MBR or
BSD disklabel disk to a GPT disk. The \fBprepare\fP subcommand can now be
executed which will create a new GPT partition. It is also run directly
or triggered by \fBceph\-deploy\fP\&.
.sp
Usage: ceph\-disk zap [DEV]
.sp
Here, [DEV] is path to block device.
.SH OPTIONS
.INDENT 0.0
.TP
.B \-\-prepend\-to\-path PATH
Prepend PATH to $PATH for backward compatibility (default /usr/bin).
.UNINDENT
.INDENT 0.0
.TP
.B \-\-statedir PATH
Directory in which ceph configuration is preserved (default /usr/lib/ceph).
.UNINDENT
.INDENT 0.0
.TP
.B \-\-sysconfdir PATH
Directory in which ceph configuration files are found (default /etc/ceph).
.UNINDENT
.INDENT 0.0
.TP
.B \-\-cluster
Provide name of the ceph cluster in which the OSD is being prepared.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-cluster\-uuid
Provide uuid of the ceph cluster in which the OSD is being prepared.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-fs\-type
Provide the filesytem type for the OSD. e.g. \(aqxfs/ext4/btrfs\(aq.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-osd\-uuid
Unique OSD uuid to assign to the disk.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-journal\-uuid
Unique uuid to assign to the journal.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-zap\-disk
Destroy the partition table and content of a disk.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-data\-dir
Verify that [data\-path] is of a directory.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-data\-dev
Verify that [data\-path] is of a block device.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-journal\-file
Verify that journal is a file.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-journal\-dev
Verify that journal is a block device.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-dmcrypt
Encrypt [data\-path] and/or journal devices with dm\-crypt.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-dmcrypt\-key\-dir
Directory where dm\-crypt keys are stored.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-activate\-key
Use when a copy of /var/lib/ceph/bootstrap\-osd/{cluster}.keyring isn\(aqt
present in the OSD node. Suffix the option by the path to the keyring.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-mark\-init
Provide init system to manage the OSD directory.
.UNINDENT
.SH AVAILABILITY
.sp
\fBceph\-disk\fP is a part of the Ceph distributed storage system. Please refer to
the Ceph documentation at \fI\%http://ceph.com/docs\fP for more information.
.SH COPYRIGHT
2010-2014, Inktank Storage, Inc. and contributors. Licensed under Creative Commons BY-SA
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