ASP.NET Core应用在AWS Linux EC2实例无法运行，显示Apache测试页

我通过AWS CodePipeline从CodeCommit拉取代码、构建并将默认ASP.NET Core Web应用发布到Linux EC2实例，整个流程执行成功，已确认应用文件已发布至/var/www/html/目录。但访问负载均衡器（EC2实例位于其后方）的URL时，仅显示Apache测试页，而非我的ASP.NET Core应用。

用到的配置文件 #

buildspec.yaml #

version: 0.2
env:
    variables:
        DOTNET_CORE_RUNTIME: 6.0
phases:
    install:
        on-failure: ABORT
        runtime-versions:
            dotnet: ${DOTNET_CORE_RUNTIME}
        commands:
            - echo install stage - started `date`
    pre_build:
        commands:
            - echo pre build stage - stared `date`
            - echo restore dependencies started `date`
            - dotnet restore ./WebApplication1/WebApplication1.csproj
    build:
        commands:
            - echo build stage - started `date`
            - dotnet publish --configuration Release --runtime linux-x64  ./WebApplication1/WebApplication1.csproj --self-contained
            - cp ./WebApplication1/appspec.yml ./WebApplication1/bin/Release/net6.0/linux-x64/publish/
artifacts:
    files:
        - '**/*'
        - appspec.yml
    name: artifact-test-cham
    discard-paths: no
    base-directory: ./WebApplication1/bin/Release/net6.0/linux-x64/publish/

appspec.yaml #

version: 0.0
os: linux
files:
  - source: /
    destination: /var/www/html/

排查与解决步骤 #

• 修改Apache反向代理配置
  Apache默认加载/var/www/html/index.html测试页，需要配置反向代理指向ASP.NET Core应用的运行端口（默认5000）：

  1. 新建或编辑Apache站点配置文件，比如/etc/httpd/conf.d/webapp.conf：

  <VirtualHost *:80>
      ProxyPreserveHost On
      ProxyPass / http://localhost:5000/
      ProxyPassReverse / http://localhost:5000/
      ErrorLog /var/log/httpd/webapp-error.log
      CustomLog /var/log/httpd/webapp-access.log common
  </VirtualHost>
  

  2. 禁用默认欢迎页配置（CentOS/RHEL）：sudo mv /etc/httpd/conf.d/welcome.conf /etc/httpd/conf.d/welcome.conf.bak
  3. 重启Apache：sudo systemctl restart httpd

• 确保ASP.NET Core应用持续运行
  部署的文件只是静态可执行文件，需要配置服务让它开机自启并保持运行：

  1. 新建systemd服务文件/etc/systemd/system/webapp.service：

  [Unit]
  Description=ASP.NET Core Web Application
  
  [Service]
  WorkingDirectory=/var/www/html
  ExecStart=/var/www/html/WebApplication1
  Restart=always
  RestartSec=10
  SyslogIdentifier=webapp
  User=apache
  Environment=ASPNETCORE_ENVIRONMENT=Production
  
  [Install]
  WantedBy=multi-user.target
  

  2. 加载配置并启动服务：

  sudo systemctl daemon-reload
  sudo systemctl start webapp
  sudo systemctl enable webapp
  

  3. 检查服务状态：sudo systemctl status webapp

• 验证端口与权限

  1. 确认应用监听5000端口：sudo netstat -tulpn | grep 5000
  2. 给EC2安全组开放80端口（负载均衡转发端口），以及5000端口（本地测试用）
  3. 调整文件权限，确保Apache用户能访问应用文件：

  sudo chown -R apache:apache /var/www/html
  sudo chmod -R 755 /var/www/html
  

内容的提问来源于stack exchange，提问作者user1268139