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This article mainly explains "how to use backupninja to customize backup plan in Debian system". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to use backupninja to customize backup plan in Debian system".

Review backupninja

A unique feature of backupninja is that it can completely discard the plain text configuration files and operation files in / etc/backup.d, and the software will take care of it. In addition, we can write custom scripts (also known as "handler") and put them in the / usr/share/backupninja directory to complete different types of backup operations. In addition, we can be guided to create some configuration files through ninjahelper's ncurses-based interactive menu (also known as "helper") to minimize human errors.

Create custom Handler and Helper

The goal of this section is to create a script that backs up the home directory as a gzip or bzip2 package, excluding music and video files. Let's name this file home and put it in the / usr/backup/ninja directory.

Although you can use the default tar handler (see / usr/share/backupninja/tar and / usr/share/backupninja/tar.helper) to achieve this effect, we use this approach to show how to create practical handler scripts and ncurses-based helper. You can decide how to use this method according to your needs.

Because handlers comes from the main script, there is no need for a shebang line that starts with #! / bin/bash.

The handler (/ usr/share/backupninja/home) we wrote is as follows. It's been annotated in detail. The getconf function reads the configuration file for the backup operation. If you specify the value of a variable, it overrides the value of the corresponding variable in the configuration file:

The code is as follows:

# / home directory handler script

# each backup file authenticates the host through FQDN

Getconf backupname

# the directory where backup files are saved

Getconf backupdir

# default compression

Getconf compress

# include / home directory

Getconf includes

# does not contain * .mp3 and * .mp4 files

Getconf excludes

# default extension of backup files to be packaged

Getconf EXTENSION

# absolute path of tar program

Getconf TAR `which tar`

# absolute path of date program

Getconf DATE `which date`

# date format

DATEFORMAT= "Y-%m-%d"

# if the backup directory does not exist, exit with a fatal error

If [!-d "$backupdir"]

Then

Mkdir-p "$backupdir" | | fatal "Can not make directory $backupdir"

Fi

# if the backup directory is not writable, also exit with a fatal error

If [!-w "$backupdir"]

Then

Fatal "Directory $backupdir is not writable"

Fi

# Select the corresponding tar option according to the compression format

Case $compress in

"gzip")

Compress_option= "- z"

EXTENSION= "tar.gz"

"bzip")

Compress_option= "- j"

EXTENSION= "tar.bz2"

"none")

Compress_option= ""

*)

Warning "Unknown compress filter ($tar_compress)"

Compress_option= ""

EXTENSION= "tar.gz"

Esac

# does not contain some file types / directories

Exclude_options= ""

For i in $excludes

Do

Exclude_options= "$exclude_options-- exclude $I"

Done

# Debug information, perform backup operation

Debug "Running backup:" $TAR-c-p-v $compress_option $exclude_options\

-f "$backupdir/$backupname-" `$DATE "+ $DATEFORMAT"` ". $EXTENSION"\

$includes

# redirect standard output to a file with a .list extension

# redirect standard error output to a file with .err extension

$TAR-c-p-v $compress_option $exclude_options\

-f "$backupdir/$backupname-" `$DATE "+ $DATEFORMAT"` ". $EXTENSION"\

$includes\

> "$backupdir/$backupname-" `$DATE "+ $DATEFORMAT"` .list\

2 > "$backupdir/$backupname-" `$DATE "+ $DATEFORMAT"`. Err

[$?-ne 0] & & fatal "Tar backup failed"

Next we will create the helper file (/ usr/share/backupninja/home.helper). In this way, the hendlers will be displayed in ninjahelper as a menu:

The code is as follows:

# backup operation description, dividing words with an underscore

HELPERS= "$HELPERS home:backup_of_home_directories"

Home_wizard () {

Home_title= "Home action wizard"

Backupname= `hostname-- fqdn`

# specify the time of backup operation

InputBox "$home_title"When to run this action?" "everyday at 01"

[$? = 1] & & return

Home_when_run= "when = $REPLY"

# specify backup file name

InputBox "$home_title"\ "Name\" of backups "$backupname"

[$? = 1] & & return

Home_backupname= "backupname= $REPLY"

Backupname= "$REPLY"

# specify the default path for saving backup files

InputBox "$home_title"Directory where to store the backups" / var/backups/home "

[$? = 1] & & return

Home_backupdir= "backupdir= $REPLY"

# specify the default value of the check box

RadioBox "$home_title"Compression"\

"none"No compression" off\

"gzip"Compress with gzip" on\

"bzip"Compress with bzip" off

[$? = 1] & & return

Result= "$REPLY"

Home_compress= "compress= $REPLY"

REPLY=

While [- z "$REPLY"]; do

FormBegin "$home_title: Includes"

FormItem "Include:" / home/gacanepa

FormDisplay

[$? = 0] | | return 1

Home_includes= "includes="

For i in $REPLY; do

[- n "$I"] & & home_includes= "$home_includes $I"

Done

Done

REPLY=

While [- z "$REPLY"]; do

FormBegin "$home_title: Excludes"

FormItem "Exclude:" * .mp3

FormItem "Exclude:" * .mp4

# add multiple "Exclude" text boxes as needed to specify other content that does not need to be included

FormItem "Exclude:"

FormItem "Exclude:"

FormDisplay

[$? = 0] | | return 1

Home_excludes= "excludes="

For i in $REPLY; do

[- n "$I"] & & home_excludes= "$home_excludes $I"

Done

Done

# Save configuration

Get_next_filename $configdirectory/10.home

Cat > $next_filename

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