(20200622已解決)容器docker||Visual Studio Code is unable to watch for file changes in this large workspa

• 問題描述

  如題所述，VSCode無法實時顯示文件變動，因爲workspace空間太大，文件太多，而linux本身對此有限制。

  From vscode offical documents, you can fixed the problem using:

  # 查看file watcher limit
  cat /proc/sys/fs/inotify/max_user_watches
  # increase the limit
  $ vim /etc/sysctl.conf
  fs.inotify.max_user_watches=524288 # 新增這麼一行
  $ sudo sysctl -p
  

  如果是在docker container內部，上述方案最後會出現：

  sysctl: setting key "fs.inotify.max_user_watches": Read-only file system

  From Increase fs.inotify.max_user_watches in docker container #628, Docker mount /proc as read-only since many of its knobs are global. If you run that same command on the host, the container will transparently inherit the new setting.

• 解決方案

  直接在容器所在宿主機上運行上述方案，當宿主機更改，容器也會自動更新。

• References

1. “Visual Studio Code is unable to watch for file changes in this large workspace” (error ENOSPC)
2. Increase fs.inotify.max_user_watches in docker container #628