IsLikelyNotMountPoint determines if a directory is not a mountpoint.
It is fast but not necessarily ALWAYS correct. If the path is in fact
a bind mount from one part of a mount to another it will not be detected.
mkdir /tmp/a /tmp/b; mount --bin /tmp/a /tmp/b; IsLikelyNotMountPoint("/tmp/b")
will return true. When in fact /tmp/b is a mount point. So this patch
renames the function and switches it from a positive to a negative (I
could think of a good positive name). This should make future users of
this function aware that it isn't quite perfect, but probably good
enough.
I have a pod, which exports a Gluster filesystem in non-default namespace.
When I try to use this FS as a GlusterfsVolumeSource in a 'client' pod
definition, Kubernetes looks for the appropriate endpoint in 'default'
namespace instead of the namespace where the client pod is being defined.