SSH support added.
Backups can be created at remote server via ssh. Destination folder should be given like “root@192.168.0.1:/bakcups” NOTE: Assumed public/private key config is ok.
This commit is contained in:
Fatih Üstündağ
+84
-18
@@ -9,6 +9,14 @@ APPNAME=$(basename $0 | sed "s/\.sh$//")
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fn_log_info() { echo "$APPNAME: $1"; }
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fn_log_warn() { echo "$APPNAME: [WARNING] $1" 1>&2; }
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fn_log_error() { echo "$APPNAME: [ERROR] $1" 1>&2; }
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fn_log_info_cmd() {
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if [ -n "$SSH_CMD" ]
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then
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echo "$APPNAME: $SSH_CMD '$1'";
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else
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echo "$APPNAME: $1";
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fi
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}
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# -----------------------------------------------------------------------------
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# Make sure everything really stops when CTRL+C is pressed
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@@ -34,7 +42,7 @@ fn_parse_date() {
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}
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fn_find_backups() {
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find "$DEST_FOLDER" -type d -name "????-??-??-??????" -prune | sort -r
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fn_run_cmd "find "$DEST_FOLDER" -type d -name "????-??-??-??????" -prune | sort -r"
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}
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fn_expire_backup() {
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@@ -46,17 +54,72 @@ fn_expire_backup() {
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fi
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fn_log_info "Expiring $1"
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rm -rf -- "$1"
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fn_rm "$1"
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}
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fn_parse_ssh() {
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if [[ "$DEST_FOLDER" =~ ^[A-Za-z0-9\._%\+\-]+@[A-Za-z0-9.\-]+\:.+$ ]]
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then
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SSH_USER=$(echo "$DEST_FOLDER" | sed -E 's/^([A-Za-z0-9\._%\+\-]+)@([A-Za-z0-9.\-]+)\:(.+)$/\1/')
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SSH_HOST=$(echo "$DEST_FOLDER" | sed -E 's/^([A-Za-z0-9\._%\+\-]+)@([A-Za-z0-9.\-]+)\:(.+)$/\2/')
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SSH_DEST_FOLDER=$(echo "$DEST_FOLDER" | sed -E 's/^([A-Za-z0-9\._%\+\-]+)@([A-Za-z0-9.\-]+)\:(.+)$/\3/')
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SSH_CMD="ssh ${SSH_USER}@${SSH_HOST}"
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SSH_FOLDER_PREFIX="${SSH_USER}@${SSH_HOST}:"
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fi
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}
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fn_run_cmd() {
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if [ -n "$SSH_CMD" ]
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then
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eval "$SSH_CMD '$1'"
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else
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eval $1
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fi
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}
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fn_find() {
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fn_run_cmd "find $1" 2>/dev/null
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}
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fn_get_absolute_path() {
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fn_run_cmd "cd $1;pwd"
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}
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fn_mkdir() {
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fn_run_cmd "mkdir -p -- $1"
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}
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fn_rm() {
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fn_run_cmd "rm -rf -- $1"
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}
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fn_touch() {
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fn_run_cmd "touch -- $1"
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}
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fn_ln() {
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fn_run_cmd "ln -vs -- $1 $2"
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}
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# -----------------------------------------------------------------------------
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# Source and destination information
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# -----------------------------------------------------------------------------
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SSH_USER=""
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SSH_HOST=""
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SSH_DEST_FOLDER=""
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SSH_CMD=""
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SSH_FOLDER_PREFIX=""
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SRC_FOLDER="${1%/}"
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DEST_FOLDER="${2%/}"
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EXCLUSION_FILE="$3"
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fn_parse_ssh
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if [ -n "$SSH_DEST_FOLDER" ]; then
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DEST_FOLDER="$SSH_DEST_FOLDER"
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fi
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for ARG in "$SRC_FOLDER" "$DEST_FOLDER" "$EXCLUSION_FILE"; do
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if [[ "$ARG" == *"'"* ]]; then
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fn_log_error 'Arguments may not have any single quote characters.'
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@@ -71,13 +134,13 @@ done
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# TODO: check that the destination supports hard links
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fn_backup_marker_path() { echo "$1/backup.marker"; }
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fn_find_backup_marker() { find "$(fn_backup_marker_path "$1")" 2>/dev/null; }
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fn_find_backup_marker() { fn_find "$(fn_backup_marker_path "$1")" 2>/dev/null; }
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if [ -z "$(fn_find_backup_marker "$DEST_FOLDER")" ]; then
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fn_log_info "Safety check failed - the destination does not appear to be a backup folder or drive (marker file not found)."
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fn_log_info "If it is indeed a backup folder, you may add the marker file by running the following command:"
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fn_log_info ""
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fn_log_info "touch \"$(fn_backup_marker_path "$DEST_FOLDER")\""
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fn_log_info_cmd "touch \"$(fn_backup_marker_path "$DEST_FOLDER")\""
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fn_log_info ""
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exit 1
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fi
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@@ -111,12 +174,12 @@ fi
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# Handle case where a previous backup failed or was interrupted.
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# -----------------------------------------------------------------------------
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if [ -f "$INPROGRESS_FILE" ]; then
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if [ -n "$(fn_find "$INPROGRESS_FILE")" ]; then
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if [ -n "$PREVIOUS_DEST" ]; then
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# - Last backup is moved to current backup folder so that it can be resumed.
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# - 2nd to last backup becomes last backup.
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fn_log_info "$INPROGRESS_FILE already exists - the previous backup failed or was interrupted. Backup will resume from there."
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mv -- "$PREVIOUS_DEST" "$DEST"
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fn_log_info "$SSH_FOLDER_PREFIX$INPROGRESS_FILE already exists - the previous backup failed or was interrupted. Backup will resume from there."
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fn_run_cmd "mv -- $PREVIOUS_DEST $DEST"
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if [ "$(fn_find_backups | wc -l)" -gt 1 ]; then
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PREVIOUS_DEST="$(fn_find_backups | sed -n '2p')"
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else
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@@ -138,8 +201,8 @@ while : ; do
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else
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# If the path is relative, it needs to be relative to the destination. To keep
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# it simple, just use an absolute path. See http://serverfault.com/a/210058/118679
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PREVIOUS_DEST="$(cd "$PREVIOUS_DEST"; pwd)"
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fn_log_info "Previous backup found - doing incremental backup from $PREVIOUS_DEST"
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PREVIOUS_DEST="$(fn_get_absolute_path "$PREVIOUS_DEST")"
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fn_log_info "Previous backup found - doing incremental backup from $SSH_FOLDER_PREFIX$PREVIOUS_DEST"
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LINK_DEST_OPTION="--link-dest='$PREVIOUS_DEST'"
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fi
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@@ -147,9 +210,9 @@ while : ; do
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# Create destination folder if it doesn't already exists
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# -----------------------------------------------------------------------------
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if [ ! -d "$DEST" ]; then
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fn_log_info "Creating destination $DEST"
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mkdir -p -- "$DEST"
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if [ -z "$(fn_find "$DEST -type d" 2>/dev/null)" ]; then
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fn_log_info "Creating destination $SSH_FOLDER_PREFIX$DEST"
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fn_mkdir "$DEST"
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fi
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# -----------------------------------------------------------------------------
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@@ -189,9 +252,12 @@ while : ; do
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fn_log_info "Starting backup..."
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fn_log_info "From: $SRC_FOLDER"
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fn_log_info "To: $DEST"
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fn_log_info "To: $SSH_FOLDER_PREFIX$DEST"
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CMD="rsync"
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if [ -n "$SSH_CMD" ]; then
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CMD="$CMD -e 'ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null'"
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fi
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CMD="$CMD --compress"
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CMD="$CMD --numeric-ids"
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CMD="$CMD --links"
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@@ -206,13 +272,13 @@ while : ; do
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CMD="$CMD --exclude-from '$EXCLUSION_FILE'"
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fi
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CMD="$CMD $LINK_DEST_OPTION"
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CMD="$CMD -- '$SRC_FOLDER/' '$DEST/'"
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CMD="$CMD -- '$SRC_FOLDER/' '$SSH_FOLDER_PREFIX$DEST/'"
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CMD="$CMD | grep -E '^deleting|[^/]$'"
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fn_log_info "Running command:"
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fn_log_info "$CMD"
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touch -- "$INPROGRESS_FILE"
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fn_touch "$INPROGRESS_FILE"
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eval $CMD
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# -----------------------------------------------------------------------------
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@@ -251,10 +317,10 @@ while : ; do
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# Add symlink to last successful backup
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# -----------------------------------------------------------------------------
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rm -rf -- "$DEST_FOLDER/latest"
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ln -vs -- "$(basename -- "$DEST")" "$DEST_FOLDER/latest"
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fn_rm "$DEST_FOLDER/latest"
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fn_ln "$(basename -- "$DEST")" "$DEST_FOLDER/latest"
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rm -f -- "$INPROGRESS_FILE"
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fn_rm "$INPROGRESS_FILE"
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rm -f -- "$LOG_FILE"
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fn_log_info "Backup completed without errors."
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