Process managers for Express appsExpress应用程序的流程管理器
Warning: This information refers to third-party sites, products, or modules that are not maintained by the Expressjs team. 警告：此信息指的是Expressjs团队未维护的第三方站点、产品或模块。Listing here does not constitute an endorsement or recommendation from the Expressjs project team.此处列出的内容并不构成Expressjs项目团队的认可或建议。
When you run Express apps for production, it is helpful to use a process manager to:运行Express apps for production时，使用流程管理器执行以下操作非常有用：
Restart the app automatically if it crashes.如果应用程序崩溃，请自动重新启动应用程序。Gain insights into runtime performance and resource consumption.深入了解运行时性能和资源消耗。Modify settings dynamically to improve performance.动态修改设置以提高性能。Control clustering.控制群集。
A process manager is somewhat like an application server: it’s a “container” for applications that facilitates deployment, provides high availability, and enables you to manage the application at runtime.process manager有点像应用程序服务器：它是应用程序的“容器”，有助于部署、提供高可用性，并使您能够在运行时管理应用程序。
The most popular process managers for Express and other Node.js applications are:Express和其他Node.js应用程序最流行的流程管理器包括：
- Forever
: A simple command-line interface tool to ensure that a script runs continuously (forever). ：一个简单的命令行界面工具，用于确保脚本连续（永久）运行。Forever’s simple interface makes it ideal for running smaller deployments of Node.js apps and scripts.Forever的简单界面非常适合运行Node.js应用程序和脚本的小型部署。
- PM2
: A production process manager for Node.js applications that has a built-in load balancer. ：具有内置负载平衡器的Node.js应用程序的生产流程管理器。PM2 enables you to keep applications alive forever, reloads them without downtime, helps you to manage application logging, monitoring, and clustering.PM2使您能够永远保持应用程序的活力，在不停机的情况下重新加载它们，帮助您管理应用程序日志记录、监视和群集。
StrongLoop Process Manager (Strong-PM)Strong循环流程管理器（Strong PM）: A production process manager for Node.js applications with built-in load balancing, monitoring, and multi-host deployment. ：Node.js应用程序的生产流程管理器，内置负载平衡、监控和多主机部署。Includes a CLI to build, package, and deploy Node.js applications to a local or remote system.包括用于将Node.js应用程序构建、打包和部署到本地或远程系统的CLI。- SystemD
: The default process manager on modern Linux distributions, that makes it simple to run a Node application as a service. ：现代Linux发行版上的默认进程管理器，使节点应用程序作为服务运行变得简单。For more information, see “Run node.js service with systemd” by Ralph Slooten (@axllent).有关更多信息，请参阅Ralph Slooten（@axllent）的“使用systemd运行node.js服务”。
