如何在不重启进程、不使用pm2-logrotate时将pm2 Node.js日志重定向到/dev/null？

Since you can't restart the process or use pm2-logrotate, here's a reliable Linux filesystem trick to redirect logs to /dev/null on the fly:

• Locate your app's log paths
  Run pm2 show <your-app-name-or-ID> and look for the out log path and error log path entries (they’re usually under ~/.pm2/logs/ by default).

• Backup existing logs (optional but recommended)
  If you don’t want to lose historical logs, make a copy first:

  cp /path/to/your-app-out.log /path/to/your-app-out.log.bak
  cp /path/to/your-app-error.log /path/to/your-app-error.log.bak
  

• Replace log files with symlinks to /dev/null
  Use ln -sf to create a symbolic link that overrides the original log files:

  ln -sf /dev/null /path/to/your-app-out.log
  ln -sf /dev/null /path/to/your-app-error.log
  

• Force pm2 to reload log files
  PM2 might still be writing to the old file handles, so run this to refresh the log streams:

  pm2 reloadLogs
  

  Now your app’s stdout and stderr will be sent to /dev/null immediately, no restart required.

For future deployments or new apps, here are the standard ways to configure pm2 to send logs to /dev/null from the start:

• Start with command-line arguments
  When launching your app directly, specify the log paths explicitly:

  pm2 start app.js --out /dev/null --error /dev/null
  

  This sends both standard output and error logs to /dev/null.

• Use an ecosystem configuration file
  Create an ecosystem.config.js file (or use your existing one) with log redirects:

  module.exports = {
    apps: [
      {
        name: "your-node-app",
        script: "./app.js",
        out_file: "/dev/null", // Redirect stdout
        error_file: "/dev/null", // Redirect stderr
        // Optional: keep timestamp formatting if needed
        log_date_format: "YYYY-MM-DD HH:mm:ss"
      }
    ]
  };
  

  Then start your app with:

  pm2 start ecosystem.config.js
  

• Set global default for all pm2 apps
  If you want every pm2-managed app to default to /dev/null logs, edit pm2’s global config file at ~/.pm2/pm2.conf.js and add:

  module.exports = {
    out_file: "/dev/null",
    error_file: "/dev/null"
  };
  

  Any new apps you start with pm2 will inherit this configuration.

内容的提问来源于stack exchange，提问作者tian-yuan