add btrbk.lib for btrfs snapshosta and backup
David Kebler
parent
8a6929b523
commit
c374b03061
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#!/bin/bash
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# dry run by default
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# >btrbk_run <conf name> <btrbk run options>
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# with -e exectue
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# >btrbk_run -e <conf name> <btrbk run options>
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# to only create the links
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# >btrbk_run -e <conf name> -n
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btrbk_scripts_dir="$(dirname $(realpath "${BASH_SOURCE:-$0}"))"
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# will try to find a conf file with out without .conf extension in a few places
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btrbk_conf () {
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local file=${1:-btrbk.conf}
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[[ -f $file ]] && echo $file && return
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[[ -f $file.conf ]] && echo $file.conf && return
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BTRBK_CONF_DIR=${BTRBK_CONF_DIR:-/snapshots/conf}
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# echo $btrbk_scripts_dir
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# echo $BTRBK_CONF_DIR
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[[ -f $BTRBK_CONF_DIR/$file ]] && echo $BTRBK_CONF_DIR/$file && return
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[[ -f $BTRBK_CONF_DIR/$file.conf ]] && echo $BTRBK_CONF_DIR/$file.conf && return
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[[ -f /etc/btrbk/$file ]] && echo /etc/btrbk/$file && return
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[[ -f /etc/btrbk/$file.conf ]] && echo /etc/btrbk/$file.conf && return
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[[ -f /etc/btrbk.conf ]] && echo /etc/btrbk.conf && return
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return 1
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}
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btrbk_run () {
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local dry_run="-n"
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local dry_run_echo="echo"
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[[ $1 == "-e" ]] && dry_run="" && dry_run_echo="" && shift
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local file=$(btrbk_conf $1)
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[[ ! $file ]] && echo unable to find conf file for ${1:-btrbk.conf} && return 1
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shift
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local src=$(sudo btrbk -c $file list config --format col:h:source_subvolume)
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local snaps=$(sudo btrbk -c $file list source --format col:h:snapshot_name)
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local dests=$(sudo btrbk -c $file list config --format col:h:snapshot_path | tail -1)
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local dests+=" $(btrbk -c $file list target --format col:h:target_path)"
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# any pre snap tasks
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for dest in $dests; do
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if [[ ! -d $dest ]]; then
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if confirm directory $dest does not exist, create; then
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sudo mkdir -p $dest
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else
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echo destination $dest directory MUST exist aborting brtbk run
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return 2
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fi
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fi
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done
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echo using configuration file: $file
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echo creating snapshots: $snaps
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echo from $src
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echo at these destinations $dests
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echo additional passed arguments: $@
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# so snaps
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[[ $dry_run ]] && echo backup dry run || echo Taking snapshost and making backups now...
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sudo btrbk -c $file run $dry_run --progress $@
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local latest=$(sudo btrbk -c $file list latest --format col:h:snapshot_subvolume | xargs -I % sh -c 'basename %' | sed '$!N; /^\(.*\)\n\1$/!P; D')
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if [[ $dry_run ]]; then
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echo Latest Snaphosts: $latest
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fi
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[[ ( ! $latest ) || $latest == "-" ]] && echo "no latest snapshots so can't make .latest links" && return 3
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# post snap tasks
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echo making .latest symlinks in each destination
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for dest in $dests; do
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for snap in $latest; do
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[[ -e $dest/${snap%%.*}.latest ]] && $dry_run_echo sudo rm $dest/${snap%%.*}.latest
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$dry_run_echo sudo ln -sr $dest/$snap $dest/${snap%%.*}.latest
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done
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done
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}
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(return 0 2>/dev/null) || btrbk_run $@
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latest_links () {
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btrbk_run -e $@ -n
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}
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latest_clone () {
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local src=$(realpath $1)
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local dest=$(realpath $2)
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shift 2
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module_load confirm
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if [[ ! -d $dest ]]; then
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if confirm "destination directory $dest does not exist, create it"; then
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sudo mkdir -p $dest
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else
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return 1
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fi
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fi
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local snaps=$(ls $src | grep latest | sed 's/.\{1\}$//' | xargs -I % realpath $src/%)
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[[ ! $snaps ]] && echo no latest snapshots in $src && ls -la $src && return 1
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if confirm create snapshots for $snaps in $dest; then
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local destsnap
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for snap in $snaps; do
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destsnap="$dest/$(basename $snap | cut -f 1 -d '.' )"
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if [[ -d $destsnap ]]; then
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if confirm -s snapshot $destsnap already exists do you want to over write it; then
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sudo btrfs subvolume delete $destsnap
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else
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return 2
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fi
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fi
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sudo btrfs subvolume snapshot $@ $snap $destsnap
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done
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echo $dest
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ls -la $dest
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fi
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}
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# use snapshot to then snap latest to another location, have it edit the fstab file
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# #!/bin/bash
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# [[ $# -lt 2 ]] && echo "need to supply a <root instance dir> and a snapshot name" && exit
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# # echo sed 's/$name/'$name'/g' named.conf.tmpl > $subvoldir-$name.conf
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# # echo sed -i 's/$subvoldir/'$subvoldir'/g' $subvoldir-$name.conf
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# named="$2"
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# src=/mnt/linuxpart
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# dest=/mnt/linuxpart
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# echo sudo mkdir -p $dest/$named
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# echo sudo btrfs subvolume snapshot $src/$1/@root $dest/$named/@root
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# echo sudo btrfs subvolume snapshot $src/$1/@opt $dest/$named/@opt
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# echo sudo btrfs subvolume snapshot $src/$1/@home $dest/$named/@home
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# echo sudo btrfs subvolume snapshot $src/@shell $dest/$named/@shell
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# sudo mkdir -p $dest/$named
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# sudo btrfs subvolume snapshot $src/$1/@root $dest/$named/@root
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# sudo btrfs subvolume snapshot $src/$1/@opt $dest/$named/@opt
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# sudo btrfs subvolume snapshot $src/$1/@home $dest/$named/@home
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# sudo btrfs subvolume snapshot $src/@shell $dest/$named/@shell
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# echo to edit: bfs_vscode $dest/$named
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