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https://0xacab.org/liberate/backupninja.git
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5c6c583181
On some workloads, a process creating backups should not become so aggressive on resources that it prevents normal activity of a machine from running. It is especially important when writing to disk. One way to make backups have less impact on the main workload is to force backups to a lower ionice level. With the new ionicelevel configuration, it becomes possible for users to activate the use of ionice and to define the level within the best-effort class to better suit their needs.
104 lines
2.7 KiB
Bash
104 lines
2.7 KiB
Bash
# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
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# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
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#
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# burncd handler script for backupninja
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#
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getconf backupdir /var/backups/makecd
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getconf exclude
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getconf target
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getconf burnertype cd
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getconf system no
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getconf isoonly yes
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getconf imagefile backup.iso
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getconf device
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getconf nicelevel 0
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getconf ionicelevel
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## Check config
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# Check that the ionicelevel is valid
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if [ -n "$ionicelevel" ] && echo "$ionicelevel" | grep -vq "^[0-7]$"; then
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fatal "The value of ionicelevel is expected to be either empty or an integer from 0 to 7. Got: $ionicelevel"
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fi
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# Only use ionice if ionicelevel is not empty
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nice="nice -n $nicelevel"
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if [ -n "$ionicelevel" ]; then
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nice="ionice -c2 -n $ionicelevel $nice"
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fi
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# define needed executables:
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MKISOFS="/usr/bin/genisoimage"
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GROWISOFS="/usr/bin/growisofs"
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CDRECORD="/usr/bin/wodim"
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CDRDAO="/usr/bin/cdrdao"
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DVDINFO="/usr/bin/dvd+rw-mediainfo"
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# create backup dirs and check existence of progs.
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[ -d $backupdir ] || mkdir -p $backupdir
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[ -d $backupdir ] || fatal "Backup directory '$backupdir'"
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[ -e "$target" ] || fatal "target does not exist "
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[ -x "$MKISOFS" ] || debug 3 "echo executable $MKISOFS not present"
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[ -x "$GROWISOFS" ] || debug 3 "echo executable $GROWISOFS not present"
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[ -x "$CDRECORD" ] || debug 3 "echo executable $CDRECORD not present"
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[ -x "$CDRDAO" ] || debug 3 "echo executable $CDRDAO not present"
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if [ "$isoonly" == "no" ]; then
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[ -e $device ] || fatal "No Burner device available"
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fi
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outputfile="$backupdir/$imagefile"
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execstr="$nice $MKISOFS --quiet -R -o $outputfile "
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str=""
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# excludes
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for i in $exclude; do
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str=" -x ${i}$str"
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done
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debug 0 "echo $str "
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execstr="${execstr} $str $target "
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debug 0 "echo $execstr "
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output=` $execstr 2>&1 `
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code=$?
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if [ "$code" == "0" ]; then
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debug "$output"
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info "Successfully finished creation of iso"
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else
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warning "$output"
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warning "Failed to create iso"
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fi
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if [ "$isoonly" == "no" ]; then
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if [ "$burnertype" == "cd" ]; then
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# burning iso to CD
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$CDRECORD -v gracetime=2 dev=$device speed=8 -dao -data $outputfile
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code=$?
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if [ "$code" == "0" ]; then
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debug "$output"
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info "Successfully burned CD"
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else
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warning "$output"
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warning "Failed to create CD"
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fi
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fi
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if [ "$burnertype" == "dvd" ]; then
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# burning iso dvd
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$GROWISOFS -speed=2 -Z $device=$outputfile -use-the-force-luke=notray -use-the-force-luke=tty
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code=$?
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if [ "$code" == "0" ]; then
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debug "$output"
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info "Successfully burned DVD"
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else
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warning "$output"
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warning "Failed to create DVD"
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fi
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fi
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fi
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return 0
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