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scripts/restore-postgres.sh

@@ -0,0 +1,122 @@
+#!/usr/bin/env bash
+# =============================================================================
+# restore-postgres.sh – Wiederherstellung einer PostgreSQL-Datenbank aus Borg
+# Läuft auf dem Raspberry Pi
+# =============================================================================
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CONFIG_FILE="${SCRIPT_DIR}/../config/backup.conf"
+source "$CONFIG_FILE"
+
+RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; BLUE='\033[0;34m'; NC='\033[0m'
+log()     { echo -e "${BLUE}[RESTORE]${NC} $*"; }
+log_ok()  { echo -e "${GREEN}[RESTORE] ✓${NC} $*"; }
+log_warn(){ echo -e "${YELLOW}[RESTORE] ⚠${NC} $*"; }
+log_err() { echo -e "${RED}[RESTORE] ✗${NC} $*" >&2; }
+
+export BORG_PASSPHRASE
+export BORG_REPO
+
+usage() {
+    echo ""
+    echo "Verwendung: $0 [OPTIONEN]"
+    echo ""
+    echo "Optionen:"
+    echo "  -l, --list               Verfügbare Archive auflisten"
+    echo "  -a, --archive ARCHIVE    Archiv-Name (z.B. mydb-2025-01-15T02:30)"
+    echo "  -d, --database DB        Ziel-Datenbank für Wiederherstellung"
+    echo "  -t, --target-host HOST   Ziel-Host (Standard: ${PG_HOST})"
+    echo "  -o, --output-dir DIR     Nur als Datei extrahieren (kein DB-Import)"
+    echo "  -h, --help               Diese Hilfe anzeigen"
+    echo ""
+    echo "Beispiele:"
+    echo "  $0 --list"
+    echo "  $0 --archive mydb-2025-01-15T02:30 --database mydb_restored"
+    echo "  $0 --archive mydb-2025-01-15T02:30 --output-dir /tmp/restore"
+    echo ""
+    exit 0
+}
+
+list_archives() {
+    log "Verfügbare Archive in ${BORG_REPO}:"
+    echo ""
+    borg list --short "${BORG_REPO}" | sort -r | while read -r archive; do
+        local info
+        info=$(borg info "${BORG_REPO}::${archive}" 2>/dev/null | grep -E "Time|Duration|Deduplicated" || echo "")
+        echo "  📦 ${archive}"
+        echo "$info" | sed 's/^/     /'
+        echo ""
+    done
+}
+
+restore_to_db() {
+    local archive="$1"
+    local target_db="$2"
+    local target_host="${3:-$PG_HOST}"
+
+    log_warn "ACHTUNG: Datenbank '${target_db}' auf '${target_host}' wird überschrieben!"
+    read -rp "Fortfahren? (ja/NEIN): " confirm
+    [[ "$confirm" != "ja" ]] && { log "Abgebrochen."; exit 0; }
+
+    log "Stelle '${archive}' → '${target_db}' auf '${target_host}' wieder her..."
+
+    # Dump aus Borg extrahieren und direkt per SSH zu pg_restore pipen
+    borg extract --stdout "${BORG_REPO}::${archive}" \
+    | ssh -i "${SSH_KEY_PATH}" \
+          -o StrictHostKeyChecking=accept-new \
+          "${PG_SSH_USER}@${target_host}" \
+          "sudo -u ${PG_DB_USER} pg_restore \
+              --dbname=${target_db} \
+              --no-owner \
+              --no-privileges \
+              --clean \
+              --if-exists \
+              --format=custom"
+
+    log_ok "Wiederherstellung abgeschlossen!"
+}
+
+extract_to_dir() {
+    local archive="$1"
+    local output_dir="$2"
+
+    mkdir -p "$output_dir"
+    log "Extrahiere '${archive}' nach '${output_dir}'..."
+    borg extract --destination "$output_dir" "${BORG_REPO}::${archive}"
+    log_ok "Datei(en) in: ${output_dir}"
+    ls -lh "$output_dir"
+}
+
+# --- Argumente parsen --------------------------------------------------------
+LIST=false
+ARCHIVE=""
+DATABASE=""
+TARGET_HOST="${PG_HOST}"
+OUTPUT_DIR=""
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        -l|--list)        LIST=true ;;
+        -a|--archive)     ARCHIVE="$2";      shift ;;
+        -d|--database)    DATABASE="$2";     shift ;;
+        -t|--target-host) TARGET_HOST="$2";  shift ;;
+        -o|--output-dir)  OUTPUT_DIR="$2";   shift ;;
+        -h|--help)        usage ;;
+        *) log_err "Unbekannte Option: $1"; usage ;;
+    esac
+    shift
+done
+
+# --- Hauptlogik --------------------------------------------------------------
+if $LIST; then
+    list_archives
+elif [[ -n "$ARCHIVE" && -n "$OUTPUT_DIR" ]]; then
+    extract_to_dir "$ARCHIVE" "$OUTPUT_DIR"
+elif [[ -n "$ARCHIVE" && -n "$DATABASE" ]]; then
+    restore_to_db "$ARCHIVE" "$DATABASE" "$TARGET_HOST"
+else
+    log_err "Keine gültige Aktion angegeben."
+    usage
+fi