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194
backend/fix_database_connection.sh
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194
backend/fix_database_connection.sh
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#!/bin/bash
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# 数据库连接问题修复脚本
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echo "=== 数据库连接问题修复工具 ==="
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# 检查当前目录
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if [ ! -f "main.py" ]; then
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echo "错误: 请在包含main.py的项目根目录下运行此脚本"
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exit 1
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fi
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echo "当前目录: $(pwd)"
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# 1. 检查.env文件
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echo ""
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echo "1. 检查环境配置..."
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if [ -f ".env" ]; then
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echo "✓ .env 文件存在"
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echo "当前数据库配置:"
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grep "DATABASE_URL" .env || echo "DATABASE_URL 未设置"
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else
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echo "⚠ .env 文件不存在，正在创建..."
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cat > .env << EOF
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# 基础配置
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ENVIRONMENT=production
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DEBUG=false
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# 数据库配置 - 请根据实际情况修改
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DATABASE_URL=mysql+pymysql://mytest_db:mytest_db@101.126.85.76:3306/mytest_db
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# Redis配置
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REDIS_URL=redis://localhost:6379
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# JWT配置
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JWT_SECRET_KEY=your-super-secret-jwt-key-change-in-production-$(date +%s)
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JWT_ALGORITHM=HS256
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JWT_EXPIRE_MINUTES=30
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# 文件上传配置
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UPLOAD_DIR=uploads
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MAX_FILE_SIZE=10485760
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# CORS配置
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ALLOWED_HOSTS=["*"]
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EOF
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echo "✓ .env 文件创建成功"
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fi
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# 2. 测试数据库连接
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echo ""
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echo "2. 测试数据库连接..."
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# 创建测试脚本
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cat > test_db_connection.py << 'EOF'
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#!/usr/bin/env python3
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import sys
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import os
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sys.path.insert(0, '.')
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try:
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from app.core.config import settings
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print(f"✓ 配置加载成功")
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print(f"数据库URL: {settings.DATABASE_URL}")
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# 测试数据库连接
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from sqlalchemy import create_engine, text
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engine = create_engine(settings.DATABASE_URL)
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with engine.connect() as conn:
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result = conn.execute(text("SELECT VERSION()"))
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version = result.fetchone()[0]
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print(f"✓ 数据库连接成功: MySQL {version}")
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# 检查数据库是否存在
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result = conn.execute(text("SHOW DATABASES LIKE 'mytest_db'"))
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if result.fetchone():
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print("✓ 数据库 'mytest_db' 存在")
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else:
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print("⚠ 数据库 'mytest_db' 不存在，需要创建")
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except ImportError as e:
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print(f"✗ 导入错误: {e}")
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print("请确保已安装所需依赖: pip install sqlalchemy pymysql")
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sys.exit(1)
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except Exception as e:
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print(f"✗ 数据库连接失败: {e}")
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print("")
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print "可能的原因:"
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print "1. 数据库服务器未启动"
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print "2. 网络连接问题"
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print "3. 用户名或密码错误"
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print "4. 数据库不存在"
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print "5. 防火墙阻止连接"
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sys.exit(1)
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EOF
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python3 test_db_connection.py
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if [ $? -eq 0 ]; then
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echo ""
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echo "✓ 数据库连接测试通过"
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else
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echo ""
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echo "✗ 数据库连接测试失败"
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echo ""
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echo "解决方案:"
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echo "1. 检查数据库服务是否运行"
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echo "2. 验证数据库连接参数"
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echo "3. 确认网络连通性"
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echo ""
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echo "请手动编辑 .env 文件中的 DATABASE_URL"
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echo "格式: mysql+pymysql://用户名:密码@主机:端口/数据库名"
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exit 1
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fi
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# 3. 检查Docker环境
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echo ""
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echo "3. 检查Docker配置..."
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if [ -f "docker-compose.yml" ]; then
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echo "✓ 发现 docker-compose.yml 文件"
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echo "检查Docker数据库配置..."
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if grep -q "mysql:" docker-compose.yml; then
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echo "⚠ 检测到Docker MySQL配置"
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echo "如果使用Docker Compose，请确保:"
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echo "1. 数据库服务已启动: docker-compose up -d mysql"
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echo "2. 数据库主机名应为 'mysql' (服务名)"
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echo "3. 确认网络配置正确"
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echo ""
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echo "Docker数据库连接配置示例:"
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echo "DATABASE_URL=mysql+pymysql://root:password@mysql:3306/mytest_db"
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fi
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fi
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# 4. 提供修复建议
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echo ""
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echo "4. 修复建议..."
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echo "根据错误信息，应用尝试连接到 'mysql' 主机，但配置中是IP地址。"
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echo "请检查以下配置:"
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echo ""
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echo "选项1: 使用外部数据库 (推荐)"
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echo "DATABASE_URL=mysql+pymysql://mytest_db:mytest_db@101.126.85.76:3306/mytest_db"
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echo ""
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echo "选项2: 使用Docker数据库"
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echo "DATABASE_URL=mysql+pymysql://root:password@mysql:3306/mytest_db"
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echo ""
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echo "选项3: 使用本地数据库"
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echo "DATABASE_URL=mysql+pymysql://root:password@localhost:3306/mytest_db"
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echo ""
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# 5. 自动修复.env文件
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echo "5. 自动修复配置..."
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if [ -f ".env" ]; then
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# 备份原文件
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cp .env .env.backup.$(date +%Y%m%d_%H%M%S)
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# 确保使用正确的数据库URL
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if grep -q "DATABASE_URL.*mysql.*mysql:" .env; then
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echo "检测到Docker主机名配置，更新为外部数据库..."
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sed -i 's|DATABASE_URL=mysql+pymysql://.*@mysql:.*|DATABASE_URL=mysql+pymysql://mytest_db:mytest_db@101.126.85.76:3306/mytest_db|' .env
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elif ! grep -q "DATABASE_URL.*101.126.85.76" .env; then
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echo "更新数据库连接配置..."
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sed -i 's|DATABASE_URL=.*|DATABASE_URL=mysql+pymysql://mytest_db:mytest_db@101.126.85.76:3306/mytest_db|' .env
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fi
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echo "✓ 数据库配置已更新"
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fi
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# 6. 重启应用提示
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echo ""
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echo "6. 重启应用..."
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echo "配置更新完成，请重启应用以使配置生效"
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echo ""
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echo "重启方式:"
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echo "1. 停止当前应用 (Ctrl+C)"
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echo "2. 重新启动: python main.py"
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echo "3. 或者使用启动脚本: ./start_app.sh"
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echo ""
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echo "=== 数据库连接修复完成 ==="
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echo ""
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echo "如果问题仍然存在，请:"
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echo "1. 确认数据库服务器地址正确: 101.126.85.76:3306"
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echo "2. 确认用户名密码正确: mytest_db / mytest_db"
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echo "3. 确认数据库名称正确: mytest_db"
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echo "4. 测试网络连通性: telnet 101.126.85.76 3306"
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