Docker部署NextJS 14应用出现连接拒绝问题求助

我通过Docker Compose运行多个应用，其他应用均可正常访问（比如http://localhost:8082能收到正常响应），但新部署的NextJS 14应用无法访问。执行curl http://localhost:8100返回：

curl: (52) Empty reply from server

容器启动日志显示NextJS已就绪：

> ▲ Next.js 14.1.0
> - Local: http://localhost:8100
> - Network: http://0.0.0.0:8100
> ✓ Ready in 219ms

相关配置文件 #

docker-compose.yml

version: '3'

services:

  admin:
    image: 'registry.gitlab.com/...react-app:latest'
    container_name: admin
    restart: always
    expose:
      - 8082
    ports:
      - 8082:80
    networks:
      - app-network

  nextjs-app:
    image: 'registry.gitlab.com/...nextjs-14-app:latest'
    container_name: nextjs-app
    restart: always
    expose:
      - 8100
    ports:
      - 8100:80
    networks:
      - app-network
    environment:
      - NODE_ENV=production

networks:
  app-network:
    driver: bridge

Dockerfile

FROM node:18-alpine AS base

FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./
RUN \
  if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
  elif [ -f package-lock.json ]; then npm ci; \
  elif [ -f pnpm-lock.yaml ]; then yarn global add pnpm && pnpm i --frozen-lockfile; \
  else echo "Lockfile not found." && exit 1; \
  fi


FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

ENV NEXT_TELEMETRY_DISABLED 1

RUN npx prisma generate
RUN yarn build


FROM base AS runner
WORKDIR /app

ENV NODE_ENV production
ENV NEXT_TELEMETRY_DISABLED 1

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

COPY --from=builder /app/public ./public

RUN mkdir .next
RUN chown nextjs:nodejs .next
RUN chown nextjs:nodejs public

COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 8100

ENV PORT 8100
ENV HOSTNAME "0.0.0.0"

CMD ["node", "server.js"]

1. 修正端口映射（核心问题） #

docker-compose中nextjs-app的端口映射错误：外部端口8100被映射到容器内的80端口，但根据Dockerfile配置，NextJS实际运行在容器内的8100端口。容器内80端口没有服务监听，导致外部请求返回空响应。

修正后的nextjs-app配置：

nextjs-app:
    image: 'registry.gitlab.com/...nextjs-14-app:latest'
    container_name: nextjs-app
    restart: always
    expose:
      - 8100
    ports:
      - 8100:8100  # 外部端口8100映射到容器内8100端口
    networks:
      - app-network
    environment:
      - NODE_ENV=production

2. 验证容器内服务状态 #

如果修正映射后仍有问题，进入容器内部验证服务是否正常：

docker exec -it nextjs-app curl localhost:8100

如果能正常返回页面内容，说明容器内服务正常，问题可能出在网络或端口转发层面；如果仍返回错误，检查服务启动日志或文件权限。

3. 检查文件权限（可选） #

Dockerfile中已配置nextjs用户权限，但可确认容器内相关目录权限是否正确：

docker exec -it nextjs-app ls -la /app

确保.next和public目录的所有者是nextjs:nodejs，避免服务因权限不足无法读取文件。

内容的提问来源于stack exchange，提问作者wvp