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https://github.com/bashclub/bashclub-zfs-push-pull.git
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Update bashclub-zfs
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cpzengel
GitHub
parent
3f681bce20
commit
6830ddf05f
156
bashclub-zfs
156
bashclub-zfs
@ -63,24 +63,26 @@ ZFS() {
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fi
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}
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###
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### defaults
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###
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tag="$prog"
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dateopts="+%F_%T"
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keep=5
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verbose=false
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quiet=false
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tossh=false
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fromssh=false
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port=22
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sshcompress=""
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reinit=""
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intermediate="-i "
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###
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### parse options
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###
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while getopts "hvqk:p:t:d:srCIRg:" opt ; do
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(
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flock -n 9 || exit 1
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###
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### defaults
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###
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tag="$prog"
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dateopts="+%F_%T"
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keep=5
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verbose=false
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quiet=false
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tossh=false
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fromssh=false
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port=22
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sshcompress=""
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reinit=""
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intermediate="-i "
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###
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### parse options
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###
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while getopts "hvqk:p:t:d:srCIRg:" opt ; do
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case $opt in
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h) usage 0 ;;
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v)
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@ -101,32 +103,32 @@ while getopts "hvqk:p:t:d:srCIRg:" opt ; do
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g) gpgid="$OPTARG" ;;
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*) usage 1 ;;
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esac
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done
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shift $((OPTIND-1))
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date="$(date $dateopts)"
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$tossh && $fromssh && die 1 "-s and -r are mutually exclusive"
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if ! $tossh && [[ -n $gpgid ]] ; then
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done
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shift $((OPTIND-1))
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date="$(date $dateopts)"
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$tossh && $fromssh && die 1 "-s and -r are mutually exclusive"
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if ! $tossh && [[ -n $gpgid ]] ; then
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die 1 "-g can only be used with -s"
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fi
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fi
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###
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### parse src & dest host/fs info
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###
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# fail if there's ever >1 colon
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if [[ $1 =~ :.*: || $2 =~ :.*: ]] ; then
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###
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### parse src & dest host/fs info
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###
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# fail if there's ever >1 colon
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if [[ $1 =~ :.*: || $2 =~ :.*: ]] ; then
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die 1 "invalid fsspec: '$1' or '$2'"
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fi
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fi
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# fail if src or dest isn't specified
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if [[ -z $1 || -z $2 ]] ; then
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# fail if src or dest isn't specified
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if [[ -z $1 || -z $2 ]] ; then
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usage 1
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fi
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src="$1"
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dest="$2"
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fi
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src="$1"
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dest="$2"
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###
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### ssh mode - output snaps from local fs to ssh or read snaps from ssh to local fs
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if $tossh ; then
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###
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### ssh mode - output snaps from local fs to ssh or read snaps from ssh to local fs
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if $tossh ; then
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log "sending from local zfs filesystem to SSH server"
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# make sure src exists
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@ -188,7 +190,7 @@ if $tossh ; then
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fi
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exit
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elif $fromssh ; then
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elif $fromssh ; then
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log "receving from SSH server to local zfs filesystem"
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# make sure dest exists
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@ -223,56 +225,58 @@ elif $fromssh ; then
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done
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exit
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fi
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fi
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# discard anything before a colon to get the fs
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srcfs="${src#*:}"
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destfs="${dest#*:}"
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# discard anything before a colon to get the fs
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srcfs="${src#*:}"
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destfs="${dest#*:}"
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# iff there is a colon, discard everything after it to get the host
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[[ $src =~ : ]] && srchost="${src%:*}"
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[[ $dest =~ : ]] && desthost="${dest%:*}"
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# iff there is a colon, discard everything after it to get the host
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[[ $src =~ : ]] && srchost="${src%:*}"
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[[ $dest =~ : ]] && desthost="${dest%:*}"
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# get the last src component
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srcbase="${srcfs##*/}"
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# get the last src component
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srcbase="${srcfs##*/}"
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# ensure the destination fs exists before proceeding
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if [[ $(ZFS "$desthost" list -H -o name "$destfs" 2>/dev/null) != $destfs ]] ; then
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# ensure the destination fs exists before proceeding
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if [[ $(ZFS "$desthost" list -H -o name "$destfs" 2>/dev/null) != $destfs ]] ; then
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die 1 "destination fs '$destfs' doesn't exist"
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fi
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fi
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###
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### create new snapshot on src
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###
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cur="$srcfs@${tag}_$date"
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ZFS "$srchost" snapshot -r "$cur" || die $? "zfs snapshot failed"
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###
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### create new snapshot on src
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###
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cur="$srcfs@${tag}_$date"
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ZFS "$srchost" snapshot -r "$cur" || die $? "zfs snapshot failed"
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###
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### get newest snapshot on dest - it must exist on src
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###
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last="$(ZFS "$desthost" list -d 1 -t snapshot -H -S creation -o name $destfs/$srcbase | head -n1 | cut -f2 -d@)"
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###
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### get newest snapshot on dest - it must exist on src
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###
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last="$(ZFS "$desthost" list -d 1 -t snapshot -H -S creation -o name $destfs/$srcbase | head -n1 | cut -f2 -d@)"
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###
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### send & receive
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###
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# 1st time: send full snapshot
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if [[ -z $last ]] ; then
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###
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### send & receive
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###
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# 1st time: send full snapshot
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if [[ -z $last ]] ; then
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log "sending full recursive snapshot from $src to $dest"
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ZFS "$srchost" send $send_opts $reinit "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs full send failed"
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# special case: tagged snapshots exist on dest, but src has rotated through all
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elif ! ZFS "$srchost" list $srcfs@$last &>/dev/null ; then
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# special case: tagged snapshots exist on dest, but src has rotated through all
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elif ! ZFS "$srchost" list $srcfs@$last &>/dev/null ; then
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die 1 "no incremental path from from $src to $dest"
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# normal case: send incremental
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else
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# normal case: send incremental
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else
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log "sending incremental snapshot from $src to $dest (${last#${tag}_}..${cur#*@${tag}_})"
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ZFS "$srchost" send $send_opts -R $intermediate "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
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fi
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fi
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###
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### clean up old snapshots
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###
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for snap in $(ZFS "$srchost" list -d 1 -t snapshot -H -S creation -o name $srcfs \
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###
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### clean up old snapshots
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###
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for snap in $(ZFS "$srchost" list -d 1 -t snapshot -H -S creation -o name $srcfs \
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| grep -F "@${tag}_" | cut -f2 -d@ | tail -n+$((keep+1)) ) ;
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do
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do
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ZFS "$srchost" destroy -r $srcfs@$snap
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done
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done
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) 9>/var/lock/bashclub-zfs.lock
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