When will vfstat system calls be supported?

Thank you docker team for creating this great piece of software. I really think docker is a game-changer.

I was just wondering when vfstat would be supported? I’ve seen in a couple earlier posts that this isn’t read yet. There are several server products that rely on this and don’t work.

This is pretty easy to reproduce:
docker run -it --rm=true -v /tmp/foo:/mounted_dir centos:centos7 stat -f /mounted_dir

Expected behavior

vfstat works

Actual behavior

vfstat calls throw an error: “Function not implemented”


  • the output of:
    OS X: version 10.11.4 (build: 15E65)
    Docker.app: version v1.11.1-beta11
    Running diagnostic tests:
    [OK] docker-cli
    [OK] Moby booted
    [OK] driver.amd64-linux
    [OK] vmnetd
    [OK] osxfs
    [OK] db
    [OK] slirp
    [OK] menubar
    [OK] environment
    [OK] Docker
    [OK] VT-x
    Docker logs are being collected into /tmp/20160510-191535.tar.gz
    Most specific failure is: No error was detected
    Your unique id is: 3FC24E15-F099-4ED4-83E8-F3B24219D85E
    Please quote this in all correspondence.

Steps to reproduce the behavior

  1. docker run -it --rm=true -v /tmp/foo:/mounted_dir centos:centos7 stat -f /mounted_dir
  2. See error: stat: cannot read file system information for ‘/mounted_dir’: Function not implemented