【Node.js】部署与运维

个人主页：Guiat
归属专栏：node.js

正文

1. Node.js 部署概述

Node.js 应用的部署与运维是将开发完成的应用程序安全、稳定地运行在生产环境中的关键环节。良好的部署策略和运维实践能够确保应用的高可用性、可扩展性和安全性。

1.1 部署的核心要素

• 环境一致性保证
• 应用程序的可靠性和稳定性
• 性能优化和资源管理
• 安全性和访问控制
• 监控和日志管理
• 自动化部署流程

1.2 Node.js 部署架构全景

2. 传统服务器部署

2.1 Linux 服务器环境准备

系统更新与基础软件安装

# Ubuntu/Debian 系统
sudo apt update && sudo apt upgrade -y# 安装必要的软件包
sudo apt install -y curl wget git build-essential# CentOS/RHEL 系统
sudo yum update -y
sudo yum install -y curl wget git gcc-c++ make# 安装 Node.js (使用 NodeSource 仓库)
curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt-get install -y nodejs# 验证安装
node --version
npm --version

创建应用用户

# 创建专用的应用用户
sudo useradd -m -s /bin/bash nodeapp
sudo usermod -aG sudo nodeapp# 切换到应用用户
sudo su - nodeapp# 创建应用目录
mkdir -p ~/apps/myapp
cd ~/apps/myapp

2.2 应用部署脚本

#!/bin/bash
# deploy.sh - 应用部署脚本set -eAPP_NAME="myapp"
APP_DIR="/home/nodeapp/apps/$APP_NAME"
REPO_URL="https://github.com/username/myapp.git"
BRANCH="main"
NODE_ENV="production"echo "开始部署 $APP_NAME..."# 创建应用目录
mkdir -p $APP_DIR
cd $APP_DIR# 克隆或更新代码
if [ -d ".git" ]; thenecho "更新代码..."git fetch origingit reset --hard origin/$BRANCH
elseecho "克隆代码..."git clone -b $BRANCH $REPO_URL .
fi# 安装依赖
echo "安装依赖..."
npm ci --production# 构建应用
echo "构建应用..."
npm run build# 设置环境变量
echo "设置环境变量..."
cp .env.example .env
# 根据需要修改 .env 文件# 重启应用
echo "重启应用..."
pm2 restart $APP_NAME || pm2 start ecosystem.config.jsecho "部署完成!"

2.3 环境变量管理

# .env.production
NODE_ENV=production
PORT=3000
HOST=0.0.0.0# 数据库配置
MONGODB_URI=mongodb://localhost:27017/myapp_prod
REDIS_URL=redis://localhost:6379# 安全配置
JWT_SECRET=your_super_secret_jwt_key_here
SESSION_SECRET=your_session_secret_here# 第三方服务
SMTP_HOST=smtp.gmail.com
SMTP_PORT=587
SMTP_USER=[e-mail]
SMTP_PASS=your_app_password# 日志配置
LOG_LEVEL=info
LOG_FILE=/var/log/myapp/app.log# 性能配置
MAX_MEMORY=512M
CLUSTER_WORKERS=auto

2.4 Nginx 反向代理配置

# /etc/nginx/sites-available/myapp
server {listen 80;server_name yourdomain.com www.yourdomain.com;# 重定向到 HTTPSreturn 301 https://$server_name$request_uri;
}server {listen 443 ssl http2;server_name yourdomain.com www.yourdomain.com;# SSL 证书配置ssl_certificate /etc/letsencrypt/live/yourdomain.com/fullchain.pem;ssl_certificate_key /etc/letsencrypt/live/yourdomain.com/privkey.pem;# SSL 安全配置ssl_protocols TLSv1.2 TLSv1.3;ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384;ssl_prefer_server_ciphers off;ssl_session_cache shared:SSL:10m;ssl_session_timeout 10m;# 安全头add_header X-Frame-Options DENY;add_header X-Content-Type-Options nosniff;add_header X-XSS-Protection "1; mode=block";add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;# 静态文件处理location /static/ {alias /home/nodeapp/apps/myapp/public/;expires 1y;add_header Cache-Control "public, immutable";}# API 代理location /api/ {proxy_pass http://127.0.0.1:3000;proxy_http_version 1.1;proxy_set_header Upgrade $http_upgrade;proxy_set_header Connection 'upgrade';proxy_set_header Host $host;proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;proxy_set_header X-Forwarded-Proto $scheme;proxy_cache_bypass $http_upgrade;# 超时设置proxy_connect_timeout 60s;proxy_send_timeout 60s;proxy_read_timeout 60s;}# 主应用代理location / {proxy_pass http://127.0.0.1:3000;proxy_http_version 1.1;proxy_set_header Upgrade $http_upgrade;proxy_set_header Connection 'upgrade';proxy_set_header Host $host;proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;proxy_set_header X-Forwarded-Proto $scheme;proxy_cache_bypass $http_upgrade;}# 健康检查location /health {access_log off;proxy_pass http://127.0.0.1:3000/health;}
}

2.5 SSL 证书配置

# 安装 Certbot
sudo apt install certbot python3-certbot-nginx# 获取 SSL 证书
sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com# 设置自动续期
sudo crontab -e
# 添加以下行
0 12 * * * /usr/bin/certbot renew --quiet

3. PM2 进程管理

3.1 PM2 安装与基本使用

# 全局安装 PM2
npm install -g pm2# 启动应用
pm2 start app.js --name "myapp"# 查看运行状态
pm2 status# 查看日志
pm2 logs myapp# 重启应用
pm2 restart myapp# 停止应用
pm2 stop myapp# 删除应用
pm2 delete myapp

3.2 PM2 配置文件

// ecosystem.config.js
module.exports = {apps: [{name: 'myapp',script: './src/index.js',instances: 'max', // 或者指定数字，如 4exec_mode: 'cluster',env: {NODE_ENV: 'development',PORT: 3000},env_production: {NODE_ENV: 'production',PORT: 3000,MONGODB_URI: 'mongodb://localhost:27017/myapp_prod'},// 日志配置log_file: './logs/combined.log',out_file: './logs/out.log',error_file: './logs/error.log',log_date_format: 'YYYY-MM-DD HH:mm:ss Z',// 自动重启配置watch: false,ignore_watch: ['node_modules', 'logs'],max_memory_restart: '1G',// 实例配置min_uptime: '10s',max_restarts: 10,// 健康检查health_check_grace_period: 3000,// 环境变量env_file: '.env'}],deploy: {production: {user: 'nodeapp',host: 'your-server.com',ref: 'origin/main',repo: 'https://github.com/username/myapp.git',path: '/home/nodeapp/apps/myapp','post-deploy': 'npm install && npm run build && pm2 reload ecosystem.config.js --env production'}}
};

3.3 PM2 集群模式

// cluster.config.js
module.exports = {apps: [{name: 'myapp-cluster',script: './src/index.js',instances: 4, // 4个工作进程exec_mode: 'cluster',// 负载均衡策略instance_var: 'INSTANCE_ID',// 集群配置kill_timeout: 5000,listen_timeout: 3000,// 内存和CPU限制max_memory_restart: '500M',node_args: '--max-old-space-size=512',env_production: {NODE_ENV: 'production',PORT: 3000}}]
};

3.4 PM2 监控与管理

# 实时监控
pm2 monit# 查看详细信息
pm2 show myapp# 重载所有应用（零停机时间）
pm2 reload all# 保存当前进程列表
pm2 save# 设置开机自启动
pm2 startup
pm2 save# 更新 PM2
pm2 update

3.5 PM2 日志管理

# 查看实时日志
pm2 logs# 查看特定应用日志
pm2 logs myapp# 清空日志
pm2 flush# 日志轮转
pm2 install pm2-logrotate# 配置日志轮转
pm2 set pm2-logrotate:max_size 10M
pm2 set pm2-logrotate:retain 30
pm2 set pm2-logrotate:compress true

4. Docker 容器化部署

4.1 Dockerfile 最佳实践

# 多阶段构建 Dockerfile
FROM node:18-alpine AS builder# 设置工作目录
WORKDIR /app# 复制 package 文件
COPY package*.json ./# 安装依赖
RUN npm ci --only=production && npm cache clean --force# 复制源代码
COPY . .# 构建应用
RUN npm run build# 生产阶段
FROM node:18-alpine AS production# 创建非 root 用户
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nodeapp -u 1001# 设置工作目录
WORKDIR /app# 复制构建产物和依赖
COPY --from=builder --chown=nodeapp:nodejs /app/dist ./dist
COPY --from=builder --chown=nodeapp:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nodeapp:nodejs /app/package*.json ./# 安装 dumb-init
RUN apk add --no-cache dumb-init# 切换到非 root 用户
USER nodeapp# 暴露端口
EXPOSE 3000# 健康检查
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \CMD node healthcheck.js# 启动应用
ENTRYPOINT ["dumb-init", "--"]
CMD ["node", "dist/index.js"]

4.2 Docker Compose 配置

# docker-compose.yml
version: '3.8'services:app:build:context: .dockerfile: Dockerfiletarget: productionimage: myapp:latestcontainer_name: myapprestart: unless-stoppedports:- "3000:3000"environment:- NODE_ENV=production- MONGODB_URI=mongodb://mongo:27017/myapp- REDIS_URL=redis://redis:6379depends_on:mongo:condition: service_healthyredis:condition: service_healthyvolumes:- app_logs:/app/logs- app_uploads:/app/uploadsnetworks:- app_networkhealthcheck:test: ["CMD", "node", "healthcheck.js"]interval: 30stimeout: 10sretries: 3start_period: 40smongo:image: mongo:6container_name: myapp_mongorestart: unless-stoppedports:- "27017:27017"environment:MONGO_INITDB_ROOT_USERNAME: adminMONGO_INITDB_ROOT_PASSWORD: passwordMONGO_INITDB_DATABASE: myappvolumes:- mongo_data:/data/db- ./mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js:ronetworks:- app_networkhealthcheck:test: echo 'db.runCommand("ping").ok' | mongosh localhost:27017/test --quietinterval: 30stimeout: 10sretries: 3start_period: 40sredis:image: redis:7-alpinecontainer_name: myapp_redisrestart: unless-stoppedports:- "6379:6379"command: redis-server --appendonly yes --requirepass passwordvolumes:- redis_data:/datanetworks:- app_networkhealthcheck:test: ["CMD", "redis-cli", "--raw", "incr", "ping"]interval: 30stimeout: 10sretries: 3start_period: 40snginx:image: nginx:alpinecontainer_name: myapp_nginxrestart: unless-stoppedports:- "80:80"- "443:443"volumes:- ./nginx.conf:/etc/nginx/nginx.conf:ro- ./ssl:/etc/nginx/ssl:ro- app_static:/var/www/static:rodepends_on:- appnetworks:- app_networkvolumes:mongo_data:redis_data:app_logs:app_uploads:app_static:networks:app_network:driver: bridge

4.3 健康检查脚本

// healthcheck.js
const http = require('http');const options = {hostname: 'localhost',port: process.env.PORT || 3000,path: '/health',method: 'GET',timeout: 2000
};const request = http.request(options, (res) => {if (res.statusCode === 200) {process.exit(0);} else {process.exit(1);}
});request.on('error', () => {process.exit(1);
});request.on('timeout', () => {request.destroy();process.exit(1);
});request.end();

4.4 Docker 部署脚本

#!/bin/bash
# docker-deploy.shset -eAPP_NAME="myapp"
IMAGE_NAME="myapp:latest"
CONTAINER_NAME="myapp_container"echo "开始 Docker 部署..."# 构建镜像
echo "构建 Docker 镜像..."
docker build -t $IMAGE_NAME .# 停止并删除旧容器
echo "停止旧容器..."
docker stop $CONTAINER_NAME 2>/dev/null || true
docker rm $CONTAINER_NAME 2>/dev/null || true# 启动新容器
echo "启动新容器..."
docker run -d \--name $CONTAINER_NAME \--restart unless-stopped \-p 3000:3000 \-e NODE_ENV=production \-v $(pwd)/logs:/app/logs \$IMAGE_NAME# 等待容器启动
echo "等待容器启动..."
sleep 10# 检查容器状态
if docker ps | grep -q $CONTAINER_NAME; thenecho "部署成功! 容器正在运行."docker logs --tail 20 $CONTAINER_NAME
elseecho "部署失败! 容器未能启动."docker logs $CONTAINER_NAMEexit 1
fi

4.5 Docker 镜像优化

# 优化后的 Dockerfile
FROM node:18-alpine AS base
RUN apk add --no-cache dumb-init
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production && npm cache clean --forceFROM base AS build
RUN npm ci
COPY . .
RUN npm run buildFROM base AS runtime
COPY --from=build /app/dist ./dist
RUN addgroup -g 1001 -S nodejs && adduser -S nodeapp -u 1001
USER nodeapp
EXPOSE 3000
HEALTHCHECK --interval=30s CMD node healthcheck.js
ENTRYPOINT ["dumb-init", "--"]
CMD ["node", "dist/index.js"]

5. Kubernetes 部署

5.1 Kubernetes 基础配置

# namespace.yaml
apiVersion: v1
kind: Namespace
metadata:name: myapplabels:name: myapp

# configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:name: myapp-confignamespace: myapp
data:NODE_ENV: "production"PORT: "3000"LOG_LEVEL: "info"

# secret.yaml
apiVersion: v1
kind: Secret
metadata:name: myapp-secretsnamespace: myapp
type: Opaque
data:# base64 编码的值MONGODB_URI: bW9uZ29kYjovL21vbmdvOjI3MDE3L215YXBwJWT_SECRET: eW91cl9qd3Rfc2VjcmV0X2hlcmU=REDIS_URL: cmVkaXM6Ly9yZWRpczozNjM3OQ==

5.2 Deployment 配置

# deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:name: myapp-deploymentnamespace: myapplabels:app: myapp
spec:replicas: 3selector:matchLabels:app: myapptemplate:metadata:labels:app: myappspec:containers:- name: myappimage: myapp:latestports:- containerPort: 3000env:- name: NODE_ENVvalueFrom:configMapKeyRef:name: myapp-configkey: NODE_ENV- name: PORTvalueFrom:configMapKeyRef:name: myapp-configkey: PORT- name: MONGODB_URIvalueFrom:secretKeyRef:name: myapp-secretskey: MONGODB_URI- name: JWT_SECRETvalueFrom:secretKeyRef:name: myapp-secretskey: JWT_SECRETresources:requests:memory: "256Mi"cpu: "250m"limits:memory: "512Mi"cpu: "500m"livenessProbe:httpGet:path: /healthport: 3000initialDelaySeconds: 30periodSeconds: 10timeoutSeconds: 5failureThreshold: 3readinessProbe:httpGet:path: /readyport: 3000initialDelaySeconds: 5periodSeconds: 5timeoutSeconds: 3failureThreshold: 3volumeMounts:- name: app-logsmountPath: /app/logsvolumes:- name: app-logsemptyDir: {}imagePullSecrets:- name: regcred

5.3 Service 配置

# service.yaml
apiVersion: v1
kind: Service
metadata:name: myapp-servicenamespace: myapplabels:app: myapp
spec:selector:app: myappports:- protocol: TCPport: 80targetPort: 3000type: ClusterIP

5.4 Ingress 配置

# ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:name: myapp-ingressnamespace: myappannotations:kubernetes.io/ingress.class: nginxcert-manager.io/cluster-issuer: letsencrypt-prodnginx.ingress.kubernetes.io/rate-limit: "100"nginx.ingress.kubernetes.io/rate-limit-window: "1m"
spec:tls:- hosts:- yourdomain.comsecretName: myapp-tlsrules:- host: yourdomain.comhttp:paths:- path: /pathType: Prefixbackend:service:name: myapp-serviceport:number: 80

5.5 HorizontalPodAutoscaler

# hpa.yaml
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:name: myapp-hpanamespace: myapp
spec:scaleTargetRef:apiVersion: apps/v1kind: Deploymentname: myapp-deploymentminReplicas: 2maxReplicas: 10metrics:- type: Resourceresource:name: cputarget:type: UtilizationaverageUtilization: 70- type: Resourceresource:name: memorytarget:type: UtilizationaverageUtilization: 80behavior:scaleDown:stabilizationWindowSeconds: 300policies:- type: Percentvalue: 10periodSeconds: 60scaleUp:stabilizationWindowSeconds: 0policies:- type: Percentvalue: 100periodSeconds: 15- type: Podsvalue: 4periodSeconds: 15selectPolicy: Max

5.6 Kubernetes 部署流程

6. 监控与日志

6.1 应用监控

Prometheus 配置

# prometheus.yml
global:scrape_interval: 15sevaluation_interval: 15srule_files:- "rules/*.yml"scrape_configs:- job_name: 'myapp'static_configs:- targets: ['localhost:3000']metrics_path: '/metrics'scrape_interval: 5s- job_name: 'node-exporter'static_configs:- targets: ['localhost:9100']alerting:alertmanagers:- static_configs:- targets:- alertmanager:9093

Node.js 应用集成 Prometheus

// metrics.js
const promClient = require('prom-client');// 创建注册表
const register = new promClient.Registry();// 添加默认指标
promClient.collectDefaultMetrics({register,prefix: 'myapp_'
});// 自定义指标
const httpRequestDuration = new promClient.Histogram({name: 'myapp_http_request_duration_seconds',help: 'HTTP request duration in seconds',labelNames: ['method', 'route', 'status_code'],buckets: [0.1, 0.5, 1, 2, 5]
});const httpRequestTotal = new promClient.Counter({name: 'myapp_http_requests_total',help: 'Total number of HTTP requests',labelNames: ['method', 'route', 'status_code']
});const activeConnections = new promClient.Gauge({name: 'myapp_active_connections',help: 'Number of active connections'
});// 注册指标
register.registerMetric(httpRequestDuration);
register.registerMetric(httpRequestTotal);
register.registerMetric(activeConnections);// 中间件
const metricsMiddleware = (req, res, next) => {const start = Date.now();res.on('finish', () => {const duration = (Date.now() - start) / 1000;const route = req.route ? req.route.path : req.path;httpRequestDuration.labels(req.method, route, res.statusCode).observe(duration);httpRequestTotal.labels(req.method, route, res.statusCode).inc();});next();
};module.exports = {register,metricsMiddleware,activeConnections
};

6.2 日志管理

Winston 日志配置

// logger.js
const winston = require('winston');
const path = require('path');// 自定义日志格式
const logFormat = winston.format.combine(winston.format.timestamp({format: 'YYYY-MM-DD HH:mm:ss'}),winston.format.errors({ stack: true }),winston.format.json()
);// 创建 logger
const logger = winston.createLogger({level: process.env.LOG_LEVEL || 'info',format: logFormat,defaultMeta: {service: 'myapp',version: process.env.APP_VERSION || '1.0.0'},transports: [// 错误日志new winston.transports.File({filename: path.join(__dirname, '../logs/error.log'),level: 'error',maxsize: 10485760, // 10MBmaxFiles: 5,tailable: true}),// 组合日志new winston.transports.File({filename: path.join(__dirname, '../logs/combined.log'),maxsize: 10485760, // 10MBmaxFiles: 5,tailable: true}),// 控制台输出new winston.transports.Console({format: winston.format.combine(winston.format.colorize(),winston.format.simple())})]
});// 请求日志中间件
const requestLogger = (req, res, next) => {const start = Date.now();res.on('finish', () => {const duration = Date.now() - start;logger.info('HTTP Request', {method: req.method,url: req.url,statusCode: res.statusCode,duration: `${duration}ms`,userAgent: req.get('User-Agent'),ip: req.ip,userId: req.user?.id});});next();
};module.exports = { logger, requestLogger };

ELK Stack 配置

# docker-compose.elk.yml
version: '3.8'services:elasticsearch:image: docker.elastic.co/elasticsearch/elasticsearch:8.8.0container_name: elasticsearchenvironment:- discovery.type=single-node- "ES_JAVA_OPTS=-Xms512m -Xmx512m"- xpack.security.enabled=falseports:- "9200:9200"volumes:- elasticsearch_data:/usr/share/elasticsearch/datalogstash:image: docker.elastic.co/logstash/logstash:8.8.0container_name: logstashports:- "5044:5044"volumes:- ./logstash.conf:/usr/share/logstash/pipeline/logstash.confdepends_on:- elasticsearchkibana:image: docker.elastic.co/kibana/kibana:8.8.0container_name: kibanaports:- "5601:5601"environment:- ELASTICSEARCH_HOSTS=http://elasticsearch:9200depends_on:- elasticsearchvolumes:elasticsearch_data:

# logstash.conf
input {beats {port => 5044}
}filter {if [fields][service] == "myapp" {json {source => "message"}date {match => [ "timestamp", "yyyy-MM-dd HH:mm:ss" ]}mutate {remove_field => [ "message", "host", "agent", "ecs", "log", "input" ]}}
}output {elasticsearch {hosts => ["elasticsearch:9200"]index => "myapp-logs-%{+YYYY.MM.dd}"}
}

6.3 APM 监控

New Relic 集成

// newrelic.js
'use strict';exports.config = {app_name: ['MyApp'],license_key: process.env.NEW_RELIC_LICENSE_KEY,logging: {level: 'info'},allow_all_headers: true,attributes: {exclude: ['request.headers.cookie','request.headers.authorization','request.headers.proxyAuthorization','request.headers.setCookie*','request.headers.x*','response.headers.cookie','response.headers.authorization','response.headers.proxyAuthorization','response.headers.setCookie*','response.headers.x*']}
};

Datadog 集成

// app.js
const tracer = require('dd-trace').init({service: 'myapp',env: process.env.NODE_ENV,version: process.env.APP_VERSION
});const express = require('express');
const app = express();// Datadog 中间件
app.use((req, res, next) => {const span = tracer.scope().active();if (span) {span.setTag('user.id', req.user?.id);span.setTag('http.route', req.route?.path);}next();
});

6.4 健康检查端点

// health.js
const mongoose = require('mongoose');
const redis = require('redis');const healthCheck = async (req, res) => {const health = {status: 'ok',timestamp: new Date().toISOString(),uptime: process.uptime(),version: process.env.APP_VERSION || '1.0.0',checks: {}};try {// 数据库连接检查if (mongoose.connection.readyState === 1) {health.checks.database = { status: 'ok' };} else {health.checks.database = { status: 'error', message: 'Database not connected' };health.status = 'error';}// Redis 连接检查const redisClient = redis.createClient();try {await redisClient.ping();health.checks.redis = { status: 'ok' };await redisClient.quit();} catch (error) {health.checks.redis = { status: 'error', message: error.message };health.status = 'error';}// 内存使用检查const memUsage = process.memoryUsage();health.checks.memory = {status: 'ok',usage: {rss: `${Math.round(memUsage.rss / 1024 / 1024)}MB`,heapTotal: `${Math.round(memUsage.heapTotal / 1024 / 1024)}MB`,heapUsed: `${Math.round(memUsage.heapUsed / 1024 / 1024)}MB`}};const statusCode = health.status === 'ok' ? 200 : 503;res.status(statusCode).json(health);} catch (error) {res.status(503).json({status: 'error',message: error.message,timestamp: new Date().toISOString()});}
};module.exports = { healthCheck };

7. 性能优化与扩展

7.1 负载均衡配置

Nginx 负载均衡

# nginx.conf
upstream myapp_backend {least_conn;server 127.0.0.1:3001 weight=3 max_fails=3 fail_timeout=30s;server 127.0.0.1:3002 weight=3 max_fails=3 fail_timeout=30s;server 127.0.0.1:3003 weight=2 max_fails=3 fail_timeout=30s;server 127.0.0.1:3004 backup;
}server {listen 80;server_name yourdomain.com;# 连接限制limit_conn_zone $binary_remote_addr zone=conn_limit_per_ip:10m;limit_req_zone $binary_remote_addr zone=req_limit_per_ip:10m rate=5r/s;location / {limit_conn conn_limit_per_ip 10;limit_req zone=req_limit_per_ip burst=10 nodelay;proxy_pass http://myapp_backend;proxy_http_version 1.1;proxy_set_header Upgrade $http_upgrade;proxy_set_header Connection 'upgrade';proxy_set_header Host $host;proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;proxy_set_header X-Forwarded-Proto $scheme;proxy_cache_bypass $http_upgrade;# 超时设置proxy_connect_timeout 5s;proxy_send_timeout 60s;proxy_read_timeout 60s;# 缓存设置proxy_cache my_cache;proxy_cache_valid 200 302 10m;proxy_cache_valid 404 1m;}
}

HAProxy 配置

# haproxy.cfg
globaldaemonmaxconn 4096log stdout local0defaultsmode httptimeout connect 5000mstimeout client 50000mstimeout server 50000msoption httplogfrontend myapp_frontendbind *:80default_backend myapp_backendbackend myapp_backendbalance roundrobinoption httpchk GET /healthserver app1 127.0.0.1:3001 checkserver app2 127.0.0.1:3002 checkserver app3 127.0.0.1:3003 checkserver app4 127.0.0.1:3004 check backup

7.2 缓存策略

Redis 缓存实现

// cache.js
const redis = require('redis');
const client = redis.createClient({url: process.env.REDIS_URL
});client.on('error', (err) => {console.error('Redis Client Error', err);
});client.connect();// 缓存中间件
const cacheMiddleware = (duration = 300) => {return async (req, res, next) => {if (req.method !== 'GET') {return next();}const key = `cache:${req.originalUrl}`;try {const cached = await client.get(key);if (cached) {return res.json(JSON.parse(cached));}// 重写 res.json 方法const originalJson = res.json;res.json = function(data) {// 缓存响应数据client.setEx(key, duration, JSON.stringify(data));return originalJson.call(this, data);};next();} catch (error) {console.error('Cache error:', error);next();}};
};// 缓存失效
const invalidateCache = async (pattern) => {try {const keys = await client.keys(pattern);if (keys.length > 0) {await client.del(keys);}} catch (error) {console.error('Cache invalidation error:', error);}
};module.exports = {client,cacheMiddleware,invalidateCache
};

7.3 数据库优化

MongoDB 优化

// database.js
const mongoose = require('mongoose');// 连接配置
const connectDB = async () => {try {const conn = await mongoose.connect(process.env.MONGODB_URI, {useNewUrlParser: true,useUnifiedTopology: true,maxPoolSize: 10, // 连接池大小serverSelectionTimeoutMS: 5000,socketTimeoutMS: 45000,bufferCommands: false,bufferMaxEntries: 0});console.log(`MongoDB Connected: ${conn.connection.host}`);} catch (error) {console.error('Database connection error:', error);process.exit(1);}
};// 索引创建
const createIndexes = async () => {try {// 用户集合索引await mongoose.connection.db.collection('users').createIndexes([{ key: { email: 1 }, unique: true },{ key: { username: 1 }, unique: true },{ key: { createdAt: -1 } }]);// 产品集合索引await mongoose.connection.db.collection('products').createIndexes([{ key: { name: 'text', description: 'text' } },{ key: { category: 1, price: 1 } },{ key: { createdAt: -1 } }]);console.log('Database indexes created');} catch (error) {console.error('Index creation error:', error);}
};module.exports = { connectDB, createIndexes };

7.4 性能监控

8. 安全与备份

8.1 安全配置

应用安全中间件

// security.js
const helmet = require('helmet');
const rateLimit = require('express-rate-limit');
const mongoSanitize = require('express-mongo-sanitize');
const xss = require('xss-clean');// 安全配置
const configureSecurity = (app) => {// 设置安全头app.use(helmet({contentSecurityPolicy: {directives: {defaultSrc: ["'self'"],styleSrc: ["'self'", "'unsafe-inline'"],scriptSrc: ["'self'"],imgSrc: ["'self'", "data:", "https:"],},},hsts: {maxAge: 31536000,includeSubDomains: true,preload: true}}));// 速率限制const limiter = rateLimit({windowMs: 15 * 60 * 1000, // 15分钟max: 100, // 限制每个IP 100个请求message: {error: 'Too many requests, please try again later.'},standardHeaders: true,legacyHeaders: false,});app.use('/api/', limiter);// 严格的认证限制const authLimiter = rateLimit({windowMs: 60 * 60 * 1000, // 1小时max: 5, // 限制每个IP 5次尝试skipSuccessfulRequests: true,});app.use('/api/auth/login', authLimiter);// 防止 NoSQL 注入app.use(mongoSanitize());// 防止 XSS 攻击app.use(xss());
};module.exports = { configureSecurity };

SSL/TLS 配置

// ssl-server.js
const https = require('https');
const fs = require('fs');
const express = require('express');const app = express();// SSL 证书配置
const sslOptions = {key: fs.readFileSync('/path/to/private-key.pem'),cert: fs.readFileSync('/path/to/certificate.pem'),ca: fs.readFileSync('/path/to/ca-certificate.pem'), // 可选// 安全配置secureProtocol: 'TLSv1_2_method',ciphers: ['ECDHE-RSA-AES256-GCM-SHA512','DHE-RSA-AES256-GCM-SHA512','ECDHE-RSA-AES256-GCM-SHA384','DHE-RSA-AES256-GCM-SHA384','ECDHE-RSA-AES256-SHA384'].join(':'),honorCipherOrder: true
};// 创建 HTTPS 服务器
const server = https.createServer(sslOptions, app);server.listen(443, () => {console.log('HTTPS Server running on port 443');
});

8.2 数据备份策略

MongoDB 备份脚本

#!/bin/bash
# mongodb-backup.shset -e# 配置
DB_NAME="myapp"
BACKUP_DIR="/backup/mongodb"
DATE=$(date +%Y%m%d_%H%M%S)
BACKUP_NAME="mongodb_backup_${DATE}"
RETENTION_DAYS=7# 创建备份目录
mkdir -p $BACKUP_DIR# 执行备份
echo "开始备份 MongoDB 数据库: $DB_NAME"
mongodump --db $DB_NAME --out $BACKUP_DIR/$BACKUP_NAME# 压缩备份
echo "压缩备份文件..."
tar -czf $BACKUP_DIR/${BACKUP_NAME}.tar.gz -C $BACKUP_DIR $BACKUP_NAME
rm -rf $BACKUP_DIR/$BACKUP_NAME# 清理旧备份
echo "清理 $RETENTION_DAYS 天前的备份..."
find $BACKUP_DIR -name "mongodb_backup_*.tar.gz" -mtime +$RETENTION_DAYS -delete# 上传到云存储 (可选)
if [ ! -z "$AWS_S3_BUCKET" ]; thenecho "上传备份到 S3..."aws s3 cp $BACKUP_DIR/${BACKUP_NAME}.tar.gz s3://$AWS_S3_BUCKET/mongodb-backups/
fiecho "备份完成: ${BACKUP_NAME}.tar.gz"

自动化备份配置

# 添加到 crontab
# 每天凌晨 2 点执行备份
0 2 * * * /path/to/mongodb-backup.sh >> /var/log/mongodb-backup.log 2>&1# 每周日凌晨 3 点执行完整备份
0 3 * * 0 /path/to/full-backup.sh >> /var/log/full-backup.log 2>&1

8.3 灾难恢复

恢复脚本

#!/bin/bash
# mongodb-restore.shset -eBACKUP_FILE=$1
DB_NAME="myapp"
TEMP_DIR="/tmp/mongodb_restore"if [ -z "$BACKUP_FILE" ]; thenecho "用法: $0 <backup_file.tar.gz>"exit 1
fiecho "开始恢复 MongoDB 数据库..."# 创建临时目录
mkdir -p $TEMP_DIR# 解压备份文件
echo "解压备份文件..."
tar -xzf $BACKUP_FILE -C $TEMP_DIR# 获取备份目录名
BACKUP_DIR=$(ls $TEMP_DIR)# 停止应用服务
echo "停止应用服务..."
pm2 stop myapp# 恢复数据库
echo "恢复数据库..."
mongorestore --db $DB_NAME --drop $TEMP_DIR/$BACKUP_DIR/$DB_NAME# 启动应用服务
echo "启动应用服务..."
pm2 start myapp# 清理临时文件
rm -rf $TEMP_DIRecho "数据库恢复完成!"

9. 故障排查与调试

9.1 常见问题诊断

内存泄漏检测

// memory-monitor.js
const v8 = require('v8');
const fs = require('fs');// 内存使用监控
const monitorMemory = () => {const usage = process.memoryUsage();const heapStats = v8.getHeapStatistics();console.log('Memory Usage:', {rss: `${Math.round(usage.rss / 1024 / 1024)}MB`,heapTotal: `${Math.round(usage.heapTotal / 1024 / 1024)}MB`,heapUsed: `${Math.round(usage.heapUsed / 1024 / 1024)}MB`,external: `${Math.round(usage.external / 1024 / 1024)}MB`,heapLimit: `${Math.round(heapStats.heap_size_limit / 1024 / 1024)}MB`});// 如果内存使用超过阈值，生成堆快照if (usage.heapUsed > 500 * 1024 * 1024) { // 500MBconst snapshot = v8.writeHeapSnapshot();console.log('Heap snapshot written to:', snapshot);}
};// 每分钟检查一次内存使用
setInterval(monitorMemory, 60000);module.exports = { monitorMemory };

性能分析

// profiler.js
const inspector = require('inspector');
const fs = require('fs');
const path = require('path');class Profiler {constructor() {this.session = null;}start() {this.session = new inspector.Session();this.session.connect();// 启用 CPU 分析器this.session.post('Profiler.enable');this.session.post('Profiler.start');console.log('CPU profiler started');}async stop() {if (!this.session) return;return new Promise((resolve, reject) => {this.session.post('Profiler.stop', (err, { profile }) => {if (err) {reject(err);return;}const filename = `cpu-profile-${Date.now()}.cpuprofile`;const filepath = path.join(__dirname, '../profiles', filename);fs.writeFileSync(filepath, JSON.stringify(profile));console.log('CPU profile saved to:', filepath);this.session.disconnect();resolve(filepath);});});}
}module.exports = Profiler;

9.2 日志分析

错误追踪

// error-tracker.js
const Sentry = require('@sentry/node');// 初始化 Sentry
Sentry.init({dsn: process.env.SENTRY_DSN,environment: process.env.NODE_ENV,tracesSampleRate: 1.0,
});// 错误处理中间件
const errorHandler = (err, req, res, next) => {// 记录错误到 SentrySentry.captureException(err, {user: {id: req.user?.id,email: req.user?.email},request: {method: req.method,url: req.url,headers: req.headers}});// 记录到本地日志console.error('Error:', {message: err.message,stack: err.stack,url: req.url,method: req.method,userId: req.user?.id,timestamp: new Date().toISOString()});// 返回错误响应const statusCode = err.statusCode || 500;res.status(statusCode).json({error: {message: process.env.NODE_ENV === 'production' ? 'Internal Server Error' : err.message,status: statusCode}});
};module.exports = { errorHandler };

9.3 调试工具

远程调试配置

# 启动应用时启用调试模式
node --inspect=0.0.0.0:9229 src/index.js# 或者使用 PM2
pm2 start src/index.js --node-args="--inspect=0.0.0.0:9229"

调试脚本

// debug-utils.js
const util = require('util');
const fs = require('fs');// 深度日志记录
const deepLog = (obj, label = 'Debug') => {console.log(`\n=== ${label} ===`);console.log(util.inspect(obj, {depth: null,colors: true,showHidden: false}));console.log('='.repeat(label.length + 8));
};// 性能计时器
class Timer {constructor(label) {this.label = label;this.start = process.hrtime.bigint();}end() {const end = process.hrtime.bigint();const duration = Number(end - this.start) / 1000000; // 转换为毫秒console.log(`${this.label}: ${duration.toFixed(2)}ms`);return duration;}
}// 内存快照
const takeMemorySnapshot = () => {const usage = process.memoryUsage();const snapshot = {timestamp: new Date().toISOString(),pid: process.pid,memory: {rss: usage.rss,heapTotal: usage.heapTotal,heapUsed: usage.heapUsed,external: usage.external}};const filename = `memory-snapshot-${Date.now()}.json`;fs.writeFileSync(filename, JSON.stringify(snapshot, null, 2));console.log('Memory snapshot saved to:', filename);return snapshot;
};module.exports = {deepLog,Timer,takeMemorySnapshot
};

10. 最佳实践与总结

10.1 部署最佳实践

部署检查清单

环境管理策略

// config/environments.js
const environments = {development: {port: 3000,database: {uri: 'mongodb://localhost:27017/myapp_dev',options: {useNewUrlParser: true,useUnifiedTopology: true}},redis: {url: 'redis://localhost:6379'},logging: {level: 'debug',console: true},security: {cors: {origin: '*'}}},staging: {port: process.env.PORT || 3000,database: {uri: process.env.MONGODB_URI,options: {useNewUrlParser: true,useUnifiedTopology: true,maxPoolSize: 5}},redis: {url: process.env.REDIS_URL},logging: {level: 'info',console: false,file: true},security: {cors: {origin: process.env.ALLOWED_ORIGINS?.split(',') || []}}},production: {port: process.env.PORT || 3000,database: {uri: process.env.MONGODB_URI,options: {useNewUrlParser: true,useUnifiedTopology: true,maxPoolSize: 10,serverSelectionTimeoutMS: 5000,socketTimeoutMS: 45000}},redis: {url: process.env.REDIS_URL,options: {retryDelayOnFailover: 100,maxRetriesPerRequest: 3}},logging: {level: 'warn',console: false,file: true,sentry: true},security: {cors: {origin: process.env.ALLOWED_ORIGINS?.split(',') || []},rateLimit: {windowMs: 15 * 60 * 1000,max: 100}}}
};module.exports = environments[process.env.NODE_ENV || 'development'];

10.2 运维自动化

自动化部署脚本

#!/bin/bash
# auto-deploy.shset -e# 配置
APP_NAME="myapp"
DEPLOY_USER="deploy"
DEPLOY_HOST="your-server.com"
DEPLOY_PATH="/opt/apps/$APP_NAME"
BACKUP_PATH="/opt/backups/$APP_NAME"
HEALTH_CHECK_URL="http://localhost:3000/health"# 颜色输出
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Colorlog() {echo -e "${GREEN}[$(date +'%Y-%m-%d %H:%M:%S')] $1${NC}"
}warn() {echo -e "${YELLOW}[$(date +'%Y-%m-%d %H:%M:%S')] WARNING: $1${NC}"
}error() {echo -e "${RED}[$(date +'%Y-%m-%d %H:%M:%S')] ERROR: $1${NC}"exit 1
}# 预检查
pre_deploy_check() {log "执行部署前检查..."# 检查 Git 状态if [[ -n $(git status --porcelain) ]]; thenerror "工作目录不干净，请提交或暂存更改"fi# 检查测试log "运行测试..."npm test || error "测试失败"# 检查构建log "检查构建..."npm run build || error "构建失败"log "预检查完成"
}# 备份当前版本
backup_current() {log "备份当前版本..."ssh $DEPLOY_USER@$DEPLOY_HOST "if [ -d $DEPLOY_PATH ]; thensudo mkdir -p $BACKUP_PATHsudo cp -r $DEPLOY_PATH $BACKUP_PATH/backup-$(date +%Y%m%d_%H%M%S)# 保留最近5个备份sudo ls -t $BACKUP_PATH | tail -n +6 | xargs -r sudo rm -rffi"log "备份完成"
}# 部署新版本
deploy() {log "开始部署..."# 上传代码rsync -avz --delete \--exclude 'node_modules' \--exclude '.git' \--exclude 'logs' \./ $DEPLOY_USER@$DEPLOY_HOST:$DEPLOY_PATH/# 远程部署命令ssh $DEPLOY_USER@$DEPLOY_HOST "cd $DEPLOY_PATHnpm ci --productionnpm run buildsudo systemctl reload nginxpm2 reload ecosystem.config.js --env production"log "部署完成"
}# 健康检查
health_check() {log "执行健康检查..."local max_attempts=30local attempt=1while [ $attempt -le $max_attempts ]; doif ssh $DEPLOY_USER@$DEPLOY_HOST "curl -f $HEALTH_CHECK_URL > /dev/null 2>&1"; thenlog "健康检查通过"return 0fiwarn "健康检查失败 (尝试 $attempt/$max_attempts)"sleep 10((attempt++))doneerror "健康检查失败，部署可能有问题"
}# 回滚
rollback() {warn "开始回滚..."ssh $DEPLOY_USER@$DEPLOY_HOST "latest_backup=\$(ls -t $BACKUP_PATH | head -n 1)if [ -n \"\$latest_backup\" ]; thensudo rm -rf $DEPLOY_PATHsudo cp -r $BACKUP_PATH/\$latest_backup $DEPLOY_PATHpm2 reload ecosystem.config.js --env productionelseecho 'No backup found for rollback'exit 1fi"warn "回滚完成"
}# 主流程
main() {log "开始自动化部署流程..."pre_deploy_checkbackup_currentdeployif health_check; thenlog "部署成功完成!"elseerror "部署失败，开始回滚..."rollbackhealth_check || error "回滚后健康检查仍然失败"warn "已回滚到之前版本"fi
}# 捕获错误并回滚
trap 'error "部署过程中发生错误"' ERR# 执行主流程
main "$@"

10.3 监控告警配置

Prometheus 告警规则

# alerts.yml
groups:- name: myapp.rulesrules:- alert: HighErrorRateexpr: rate(myapp_http_requests_total{status_code=~"5.."}[5m]) > 0.1for: 5mlabels:severity: criticalannotations:summary: "High error rate detected"description: "Error rate is {{ $value }} errors per second"- alert: HighResponseTimeexpr: histogram_quantile(0.95, rate(myapp_http_request_duration_seconds_bucket[5m])) > 1for: 5mlabels:severity: warningannotations:summary: "High response time detected"description: "95th percentile response time is {{ $value }} seconds"- alert: HighMemoryUsageexpr: (myapp_process_resident_memory_bytes / 1024 / 1024) > 512for: 10mlabels:severity: warningannotations:summary: "High memory usage"description: "Memory usage is {{ $value }}MB"- alert: ServiceDownexpr: up{job="myapp"} == 0for: 1mlabels:severity: criticalannotations:summary: "Service is down"description: "MyApp service is not responding"

告警通知配置

# alertmanager.yml
global:smtp_smarthost: 'smtp.gmail.com:587'smtp_from: '[e-mail]'route:group_by: ['alertname']group_wait: 10sgroup_interval: 10srepeat_interval: 1hreceiver: 'web.hook'receivers:- name: 'web.hook'email_configs:- to: '[e-mail]'subject: 'Alert: {{ .GroupLabels.alertname }}'body: |{{ range .Alerts }}Alert: {{ .Annotations.summary }}Description: {{ .Annotations.description }}{{ end }}slack_configs:- api_url: 'YOUR_SLACK_WEBHOOK_URL'channel: '#alerts'title: 'Alert: {{ .GroupLabels.alertname }}'text: |{{ range .Alerts }}{{ .Annotations.summary }}{{ .Annotations.description }}{{ end }}

10.4 总结

Node.js 应用的部署与运维是一个复杂的系统工程，需要考虑多个方面：

关键要点

1. 环境一致性：使用容器化技术确保开发、测试、生产环境的一致性
2. 自动化流程：建立完整的 CI/CD 流水线，减少人工操作错误
3. 监控体系：建立全面的监控和告警系统，及时发现和解决问题
4. 安全防护：实施多层安全防护措施，保护应用和数据安全
5. 性能优化：通过负载均衡、缓存、数据库优化等手段提升性能
6. 故障恢复：建立完善的备份和恢复机制，确保业务连续性

技术选型建议

• 小型应用：PM2 + Nginx + 传统服务器部署
• 中型应用：Docker + Docker Compose + 云服务器
• 大型应用：Kubernetes + 微服务架构 + 云原生技术栈

运维成熟度模型

通过逐步实施这些最佳实践，可以构建一个稳定、可靠、高性能的 Node.js 应用运行环境，为业务发展提供坚实的技术保障。

结语
感谢您的阅读！期待您的一键三连！欢迎指正！