.

backup/backup_by_json.sh

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-/works/repos/admin/storage_backup.sh

backup/backup_by_json.sh

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+#!/bin/bash
+# Script to create and run rsync command based on JSON configuration
+
+: <<'COMMENT'
+Config File Example (local backup for hs01
+==========================================
+{
+    "Name" : "hs01",
+    "Host" : "",
+
+    "BackupHost" : "",
+    "BackupRootDir" : "/backup/hs01",
+
+    "Filesystems" : ["/etc", "/opt", "/archive", "/data", "/works" ],
+
+    "RsyncOptions" : ["-arxv", "--delete", "--relative" ],
+
+    "Exclude" : ["*var/tmp*"
+                 , "*var/lib/ntp/proc*"
+                 , "*.cache*"
+                 , "*root/.mozilla*"
+                 , "*var/cache*"
+                 , "*var/spool*"
+                 , "*/.kde4/*"
+                 , "/tmp"
+               ],
+
+    "DailySnapshots" : false,
+    "PruneBackupDays" : 1
+
+}
+COMMENT
+
+
+usage() {
+    echo "Usage: ${Script} <json_config_file>"
+    exit 1
+}
+
+
+# Check if jq is installed
+if ! command -v jq &>/dev/null; then
+    echo "Error: jq is required for JSON processing. Install it and try again."
+    exit 1
+fi
+
+# Verify configuration
+verify_config() {
+    local config_file="$1"
+
+    # Check if required directories and files exist
+    local backup_root_dir
+    backup_root_dir=$(jq -r '.BackupRootDir' "$config_file")
+    if [[ ! -d "$backup_root_dir" ]]; then
+        echo "----- Error: BackupRootDir ($backup_root_dir) does not exist."
+        mkdir -p "${backup_root_dir}"
+    fi
+
+}
+
+# Run rsync
+run_rsync() {
+    local cmdlist=("$@")
+    echo "----- Running rsync: ${cmdlist[*]}"
+    "${cmdlist[@]}"
+}
+
+# Prune old backups
+prune_backup_dirs() {
+    local bkp_host="$1"
+    local root_dir="$2"
+    local days="$3"
+
+    echo "----- Looking for files to prune..."
+    local cmd="cd $root_dir && ls -rd 2* | awk -v days=$days '{ if (NR > days) print }'"
+    [[ -n "$bkp_host" ]] && cmd="ssh $bkp_host \"$cmd\""
+
+    echo "----- Command: $cmd"
+    local files
+    files=$(eval "$cmd")
+    if [[ -n "$files" ]]; then
+        echo "----- Found files to prune:"
+        echo "$files"
+        local prune_cmd="rm -rf $(echo "$files" | xargs -I {} echo "$root_dir/{}")"
+        [[ -n "$bkp_host" ]] && prune_cmd="ssh $bkp_host \"$prune_cmd\""
+        echo "----- Executing: $prune_cmd"
+        eval "$prune_cmd"
+    else
+        echo "----- Nothing to prune."
+    fi
+}
+
+# Generate rsync arguments
+get_rsync_arguments() {
+    local config_file="$1"
+    local dt="$2"
+    local fs="$3"
+
+    local bkp_root_dir
+    bkp_root_dir=$(jq -r '.BackupRootDir' "$config_file")
+    local daily_snapshots
+    daily_snapshots=$(jq -r '.DailySnapshots' "$config_file")
+    local rsync_options
+    rsync_options=$(jq -r '.RsyncOptions[]' "$config_file")
+    local exclude_list
+    exclude_list=$(jq -r '.Exclude[]' "$config_file")
+
+    local bkp_dir="$bkp_root_dir"
+    [[ "$daily_snapshots" == "true" ]] && bkp_dir="$bkp_root_dir/$dt"
+
+    local cmdlist=("rsync" $rsync_options)
+    for excl in $exclude_list; do
+        cmdlist+=("--exclude=$excl")
+    done
+    [[ "$daily_snapshots" == "true" ]] && cmdlist+=("--link-dest=$bkp_root_dir/current")
+
+    local src_host
+    src_host=$(jq -r '.Host' "$config_file")
+    [[ -n "$src_host" ]] && src_host="$src_host:"
+
+    local tgt_host
+    tgt_host=$(jq -r '.BackupHost' "$config_file")
+    [[ -n "$tgt_host" ]] && tgt_host="$tgt_host:"
+
+    cmdlist+=("${src_host}${fs}" "${tgt_host}${bkp_dir}/")
+
+    echo "${cmdlist[@]}"
+}
+
+# Main function
+main() {
+    local config_file="$1"
+    if [[ ! -f "$config_file" ]]; then
+        echo "----- Error: Configuration file $config_file does not exist."
+        exit 1
+    fi
+
+    if ! verify_config "$config_file"; then
+        exit 1
+    fi
+
+    local dt
+    dt=$(date +%Y%m%d)
+
+    local filesystems
+    filesystems=$(jq -r '.Filesystems[]' "$config_file")
+    for fs in $filesystems; do
+        echo "----- Processing filesystem: $fs"
+        local cmdlist
+        cmdlist=($(get_rsync_arguments "$config_file" "$dt" "$fs"))
+        run_rsync "${cmdlist[@]}"
+    done
+
+    local daily_snapshots
+    daily_snapshots=$(jq -r '.DailySnapshots' "$config_file")
+    if [[ "$daily_snapshots" == "true" ]]; then
+        local bkp_root_dir
+        bkp_root_dir=$(jq -r '.BackupRootDir' "$config_file")
+        local bkp_host
+        bkp_host=$(jq -r '.BackupHost' "$config_file")
+        local cmd="ln -snf $bkp_root_dir/$dt $bkp_root_dir/current"
+        [[ -n "$bkp_host" ]] && cmd="ssh $bkp_host \"$cmd\""
+        echo "----- Switching current symlink: $cmd"
+        eval "$cmd"
+
+        local prune_days
+        prune_days=$(jq -r '.PruneBackupDays' "$config_file")
+        if [[ "$prune_days" -gt 0 ]]; then
+            local bkp_root_dir
+            bkp_root_dir=$(jq -r '.BackupRootDir' "$config_file")
+            local bkp_host
+            bkp_host=$(jq -r '.BackupHost' "$config_file")
+            prune_backup_dirs "$bkp_host" "$bkp_root_dir" "$prune_days"
+        fi
+    fi
+}
+
+# Entry point
+Script=${0}
+Config=${1}
+if [[ $# -lt 1 ]]; then
+    usage
+    exit 1
+fi
+
+main "${Config}"
+