Redis自动备份脚本

#!/bin/bash # ========================================== # Redis自动备份脚本 # 用途：自动备份Redis数据，支持RDB/AOF，自动压缩清理 # 使用方法：加入crontab每天凌晨执行 # ========================================== # ========== 配置 ========== REDIS_HOST="127.0.0.1" REDIS_PORT=6379 REDIS_PASSWORD="" REDIS_CLI="redis-cli" BACKUP_DIR="/backup/redis" BACKUP_PREFIX="redis_backup" KEEP_DAYS=7 # 保留天数 RDB_FILE="/var/lib/redis/dump.rdb" # RDB文件路径 AOF_FILE="/var/lib/redis/appendonly.aof" # AOF文件路径 BACKUP_TYPE="both" # rdb / aof / both LOG_FILE="/var/log/redis_backup.log" ALERT_EMAIL="" # ========================== mkdir -p "$BACKUP_DIR" mkdir -p "$(dirname "$LOG_FILE")" log_msg() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a "$LOG_FILE" } send_alert() { local title="$1" local content="$2" log_msg "【告警】$title: $content" if [ -n "$ALERT_EMAIL" ]; then echo -e "$content" | mail -s "【Redis备份】$title" "$ALERT_EMAIL" 2>/dev/null fi } # 检查redis-cli if ! command -v "$REDIS_CLI" >/dev/null 2>&1; then log_msg "❌ redis-cli未安装" exit 1 fi # 连接参数 CONN_PARAMS="-h $REDIS_HOST -p $REDIS_PORT" if [ -n "$REDIS_PASSWORD" ]; then CONN_PARAMS="$CONN_PARAMS -a $REDIS_PASSWORD" fi # 检查Redis连接 if ! $REDIS_CLI $CONN_PARAMS ping >/dev/null 2>&1; then log_msg "❌ 无法连接Redis: $REDIS_HOST:$REDIS_PORT" send_alert "Redis备份失败" "无法连接Redis服务器: $REDIS_HOST:$REDIS_PORT" exit 1 fi DATE=$(date '+%Y%m%d_%H%M%S') log_msg "===== Redis备份开始 =====" log_msg "备份类型: $BACKUP_TYPE" log_msg "Redis: $REDIS_HOST:$REDIS_PORT" # 获取Redis信息 REDIS_VERSION=$($REDIS_CLI $CONN_PARAMS info server 2>/dev/null | grep "redis_version" | cut -d: -f2 | tr -d '\r') DB_SIZE=$($REDIS_CLI $CONN_PARAMS dbsize 2>/dev/null) log_msg "Redis版本: $REDIS_VERSION" log_msg "当前key数量: $DB_SIZE" BACKUP_SUCCESS=true # RDB备份 if [ "$BACKUP_TYPE" = "rdb" ] || [ "$BACKUP_TYPE" = "both" ]; then log_msg "--- RDB备份 ---" # 触发BGSAVE $REDIS_CLI $CONN_PARAMS bgsave >/dev/null 2>&1 log_msg "已触发BGSAVE，等待完成..." # 等待BGSAVE完成 for i in $(seq 1 60); do LAST_SAVE=$($REDIS_CLI $CONN_PARAMS lastsave 2>/dev/null) BGSAVE_STATUS=$($REDIS_CLI $CONN_PARAMS info persistence 2>/dev/null | grep "rdb_bgsave_in_progress" | cut -d: -f2 | tr -d '\r') if [ "$BGSAVE_STATUS" = "0" ]; then log_msg "BGSAVE完成" break fi sleep 2 done # 复制RDB文件 if [ -f "$RDB_FILE" ]; then RDB_BACKUP="$BACKUP_DIR/${BACKUP_PREFIX}_${DATE}.rdb" cp "$RDB_FILE" "$RDB_BACKUP" if [ -f "$RDB_BACKUP" ]; then gzip -f "$RDB_BACKUP" RDB_SIZE=$(du -h "${RDB_BACKUP}.gz" | awk '{print $1}') log_msg "✓ RDB备份成功: ${RDB_BACKUP}.gz ($RDB_SIZE)" else log_msg "✗ RDB备份文件复制失败" BACKUP_SUCCESS=false fi else log_msg "✗ RDB文件不存在: $RDB_FILE" BACKUP_SUCCESS=false fi fi # AOF备份 if [ "$BACKUP_TYPE" = "aof" ] || [ "$BACKUP_TYPE" = "both" ]; then log_msg "--- AOF备份 ---" if [ -f "$AOF_FILE" ]; then AOF_BACKUP="$BACKUP_DIR/${BACKUP_PREFIX}_${DATE}.aof" cp "$AOF_FILE" "$AOF_BACKUP" if [ -f "$AOF_BACKUP" ]; then gzip -f "$AOF_BACKUP" AOF_SIZE=$(du -h "${AOF_BACKUP}.gz" | awk '{print $1}') log_msg "✓ AOF备份成功: ${AOF_BACKUP}.gz ($AOF_SIZE)" else log_msg "✗ AOF备份文件复制失败" BACKUP_SUCCESS=false fi else log_msg "⚠️ AOF文件不存在，跳过AOF备份（可能未开启AOF持久化）" fi fi # 清理旧备份 log_msg "--- 清理旧备份 ---" DELETED=$(find "$BACKUP_DIR" -name "${BACKUP_PREFIX}_*" -mtime +$KEEP_DAYS -print -delete | wc -l) log_msg "已删除 $DELETED 个超过${KEEP_DAYS}天的旧备份" # 备份统计 log_msg "--- 备份统计 ---" TOTAL_FILES=$(find "$BACKUP_DIR" -name "${BACKUP_PREFIX}_*" | wc -l) TOTAL_SIZE=$(du -sh "$BACKUP_DIR" | awk '{print $1}') log_msg "备份文件总数: $TOTAL_FILES" log_msg "备份目录大小: $TOTAL_SIZE" if [ "$BACKUP_SUCCESS" = true ]; then log_msg "===== Redis备份完成 ✓ =====" else log_msg "===== Redis备份完成（存在失败项）⚠️ =====" send_alert "Redis备份存在失败项" "备份过程中有部分操作失败，请查看日志: $LOG_FILE" fi

[{"name": "REDIS_HOST", "label": "Redis\u4e3b\u673a", "default": "127.0.0.1"}, {"name": "REDIS_PORT", "label": "Redis\u7aef\u53e3", "default": "6379"}, {"name": "REDIS_PASSWORD", "label": "Redis\u5bc6\u7801(\u53ef\u9009)", "default": ""}, {"name": "BACKUP_DIR", "label": "\u5907\u4efd\u76ee\u5f55", "default": "/backup/redis"}, {"name": "KEEP_DAYS", "label": "\u4fdd\u7559\u5929\u6570", "default": "7"}, {"name": "BACKUP_TYPE", "label": "\u5907\u4efd\u7c7b\u578b(rdb/aof/both)", "default": "both"}]