mirror of https://github.com/digint/btrbk
117 lines
4.3 KiB
Groff
117 lines
4.3 KiB
Groff
.TH "btrbk.conf" "5" "2015-03-13" "btrbk v0.12" ""
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.SH NAME
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btrbk.conf \- btrbk configuration file
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.SH SYNOPSIS
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.B /etc/btrbk.conf
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.br
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.B /etc/btrbk/btrbk.conf
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.SH DESCRIPTION
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The btrbk configuration file specifies which btrfs subvolumes on the
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filesystem are to be processed, what target subvolumes should be used
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to create the backups, and where the snapshots should be
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generated. The retention policy as well as other options can be
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defined for each backup.
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.PP
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The options specified always apply to the last section encountered,
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overriding the same option of the next higher section. This means that
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global options must be set before any sections are defined.
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.PP
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The sections are:
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.TP
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\fBvolume\fR <volume-directory>|<url>
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Directory of a btrfs volume (or subvolume) containing the source
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subvolume(s) to be backuped (usually the mount-point of a btrfs
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filesystem mounted with the \fIsubvolid=0\fR option).
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.TP
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\fBsubvolume\fR <subvolume-name>
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Subvolume to be backuped, relative to the \fI<volume-directory>\fR
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specified in the \fIvolume\fR section.
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.TP
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\fBtarget\fR <type> <volume-directory>|<url>
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Target type and directory where the backup subvolumes are to be
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created. In the current version of btrbk, the only valid \fI<type>\fR
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is \(lqsend\-receive\(rq.
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.PP
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For the \fIvolume\fR and \fItarget\fR sections, you can also specify a
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ssh-url instead of a local directory. The syntax for \fI<url>\fR is:
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.IP
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ssh://host.xz/path/to/volume
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.PP
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The configuration options are:
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.TP
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\fBsnapshot_dir\fR <directory>
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Directory in which the btrfs snapshots are created. Relative to
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\fI<volume-directory>\fR of the \fIvolume\fR section. Note that btrbk
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does not autmatically create this directory, and the snapshot creation
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will fail if it is not present.
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.TP
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\fBsnapshot_create_always\fR yes|no
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If set, the snapshots are always created, even if the backup subvolume
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cannot be created (e.g. if the target subvolume cannot be
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reached). Defaults to \(lqno\(rq. Useful for subvolumes on laptops to
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make sure the snapshots are created even if you are on the road.
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.TP
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\fBincremental\fR yes|no|strict
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Perform incremental backups. Defaults to \(lqyes\(rq. If set to
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\(lqstrict\(rq, non-incremental (initial) backups are never created.
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.TP
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\fBtarget_preserve_daily\fR all|<number>
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How many days of backups should be preserved. Defaults to \(lqall\(rq.
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.TP
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\fBtarget_preserve_weekly\fR all|<number>
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Defines for how many weeks back weekly backups should be
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preserved. Every backup created at \fIpreserve_day_of_week\fR (or
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the next backup in this week if none was made on the exact day) is
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considered as a weekly backup. Defaults to \(lq0\(rq.
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.TP
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\fBtarget_preserve_monthly\fR all|<number>
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Defines for how many months back monthly backups should be
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preserved. Every last weekly backup in a month is considered a
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monthly backup. Defaults to \(lqall\(rq.
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.TP
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\fBsnapshot_preserve_daily\fR
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.PD 0
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.TP
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\fBsnapshot_preserve_weekly\fR
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.TP
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\fBsnapshot_preserve_monthly\fR
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Define retention policy for the snapshots, with same semantics as the
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\fItarget_preserve_*\fR options.
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.PD
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.TP
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\fBpreserve_day_of_week\fR monday|tuesday|...|sunday
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Defines on what day a backup/snapshot is considered as a weekly
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backup. Defaults to \(lqsunday\(rq.
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.TP
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\fBssh_identity\fR <file>
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Absolute path to a ssh identity file (private key). Note that if the
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private key is password protected, btrbk will prompt for user input,
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which is usually not desired.
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.TP
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\fBssh_user\fR <username>
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Remote username for ssh. Defaults to \(lqroot\(rq. Note that you will
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have to make sure that the remote user is able to run /sbin/btrfs
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(which needs root privileges).
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.TP
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\fBbtrfs_commit_delete\fR after|each|no
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If set, make sure the deletion of snapshot and backup subvolumes are
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committed to disk when btrbk terminates. Defaults to \(lqno\(rq.
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.TP
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\fBreceive_log\fR <file>|sidecar|no
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Dump verbose output of \fIbtrfs receive\fR to a specified file. If set
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to \(lqsidecar\(rq, the file will be created in the backup directory,
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named \fI<backup_subvolume>.btrbk.log\fR. Note that this log file can
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become very big, as every change of every file is being
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logged. Consider this as a debugging feature. Defaults to \(lqno\(rq.
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.PP
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Lines that contain a hash character (#) in the first column are
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treated as comments.
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.SH AVAILABILITY
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Please refer to the btrbk project page
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\fBhttp://www.digint.ch/btrbk\fR for further
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details.
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.SH SEE ALSO
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.BR btrbk (1)
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.SH AUTHOR
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Axel Burri <axel@tty0.ch>
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