[Bug 1555760] Re: Too many levels of symbolic links /proc/sys/fs/binfmt_misc

[Stéphane Graber]

@cmars
Note that the too many levels of symlink is on the host, not in the container and is the reason why you needed to do the umount and remount.

In fact, your log file says you did get that error:
            lxc 20160331183429.245 ERROR    lxc_utils - utils.c:safe_mount:1692 - Too many levels of symbolic links - Failed to mount /proc/sys/fs/binfmt_misc onto /usr/lib/x86_64-linux-gnu/lxc/proc/sys/fs/binfmt_misc

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Title:
   Too many levels of symbolic links /proc/sys/fs/binfmt_misc

Status in binfmt-support package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  At first I thought this was an LXD issue, but it turns out the issue
  is in systemd

  https://github.com/lxc/lxd/issues/1727#issuecomment-194416558

  ls -l  /proc/sys/fs/binfmt_misc  fails with error:

  Too many levels of symbolic links

  
  I restarted binfmt manually by running:

      sudo /usr/sbin/update-binfmts --disable
      sudo /usr/sbin/update-binfmts --enable

  I think using systemd to do this would have also worked:

      sudo service binfmt-support restart

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