apiVersion: v1
kind: ConfigMap
metadata:
  name: backup-script
  namespace: backup-system
data:
  backup.sh: |
    #!/bin/bash
    set -e

    # 获取环境变量
    MINIO_ENDPOINT="${MINIO_ENDPOINT}"
    MINIO_ACCESS_KEY="${MINIO_ACCESS_KEY}"
    MINIO_SECRET_KEY="${MINIO_SECRET_KEY}"
    MINIO_BUCKET="${MINIO_BUCKET}"
    MINIO_SUBPATH="${MINIO_SUBPATH:-backups}"
    BACKUPS_TO_KEEP="${BACKUPS_TO_KEEP:-7}"
    
    # 获取主机名
    HOSTNAME=$(hostname)
    
    # 检查 /data/local-csi 路径是否存在
    if [ ! -d "/data/local-csi" ]; then
      echo "目录 /data/local-csi 不存在，退出备份"
      exit 0
    fi
    
    # 检查目录下是否有至少一个子目录
    DIR_COUNT=$(find /data/local-csi -mindepth 1 -maxdepth 1 -type d | wc -l)
    if [ "$DIR_COUNT" -eq 0 ]; then
      echo "目录 /data/local-csi 中没有子目录，退出备份"
      exit 0
    fi
    
    # 配置 MinIO 客户端
    mc alias set local-minio $MINIO_ENDPOINT $MINIO_ACCESS_KEY $MINIO_SECRET_KEY
    
    # 遍历所有目录
    find /data/local-csi -mindepth 1 -maxdepth 1 -type d | while read dir; do
      DIR_NAME=$(basename "$dir")
      TIMESTAMP=$(date +%Y-%m-%d-%H-%M-%S)
      BACKUP_NAME="backup-${DIR_NAME}-${TIMESTAMP}.tar.gz"
      BACKUP_PATH="/tmp/${BACKUP_NAME}"
      
      echo "正在备份目录: $dir"
      
      # 创建备份压缩包
      tar -czf "$BACKUP_PATH" -C "/data/local-csi" "$DIR_NAME"
      
      # 上传到 MinIO
      BACKUP_TARGET_PATH="${MINIO_SUBPATH}/${HOSTNAME}/${DIR_NAME}/"
      echo "上传备份 $BACKUP_PATH 到 MinIO 路径: $BACKUP_TARGET_PATH"
      
      # 确保目标目录存在
      mc ls "local-minio/${MINIO_BUCKET}/${BACKUP_TARGET_PATH}" > /dev/null 2>&1 || \
        mc mb -p "local-minio/${MINIO_BUCKET}/${BACKUP_TARGET_PATH}"
        
      # 上传备份文件
      mc cp "$BACKUP_PATH" "local-minio/${MINIO_BUCKET}/${BACKUP_TARGET_PATH}${BACKUP_NAME}"
      
      # 删除本地临时备份
      rm "$BACKUP_PATH"
      
      # 清理旧备份
      echo "清理旧备份，保留最新的 $BACKUPS_TO_KEEP 个文件"
      BACKUP_COUNT=$(mc ls "local-minio/${MINIO_BUCKET}/${BACKUP_TARGET_PATH}" | wc -l)
      if [ "$BACKUP_COUNT" -gt "$BACKUPS_TO_KEEP" ]; then
        # 列出备份并按时间排序，删除最老的备份
        mc ls --json "local-minio/${MINIO_BUCKET}/${BACKUP_TARGET_PATH}" | \
          jq -r '. | select(.type=="file") | [.key, .lastModified] | @tsv' | \
          sort -k2 | head -n $(($BACKUP_COUNT - $BACKUPS_TO_KEEP)) | \
          while read file_info; do
            FILE=$(echo "$file_info" | cut -f1)
            echo "删除旧备份: $FILE"
            mc rm "local-minio/${MINIO_BUCKET}/${BACKUP_TARGET_PATH}${FILE}"
          done
      fi
    done
    
    echo "备份完成"