GlusterFS by default uses a log file based on the mountpoint path munged into a
file, i.e. `/mnt/foo/bar` becomes `/var/log/glusterfs/mnt-foo-bar.log`.
On certain Kubernetes environments this can result in a log file that exceeds
the 255 character length most filesystems impose on filenames causing the mount
to fail. Instead, use the `log-file` mount option to place the log file under
the kubelet plugin directory with a filename of our choosing keeping it fairly
persistent in the case of troubleshooting.
A lot of packages use StringSet, but they don't use anything else from
the util package. Moving StringSet into another package will shrink
their dependency trees significantly.
This code was originally added because the first mount call did not
respect the ro option. This no longer seems to be the cause so there
is no need to use remount.
Signed-off-by: Sami Wagiaalla <swagiaal@redhat.com>
The GCE PD plugin uses safe_format_and_mount found on standard GCE images:
https://github.com/GoogleCloudPlatform/compute-image-packages/blob/master/google-startup-scripts/usr/share/google/safe_format_and_mount
On custom images where this is not available pods fail to format and
mount GCE PDs. This patch uses linux utilities in a similar way to the
safe_format_and_mount script to format and mount the GCE PD and AWS EBC
devices. That is first attempt a mount. If mount fails try to use file to
investigate the device. If 'file' fails to get any information about
the device and simply returns "data" then assume the device is not
formatted and format it and attempt to mount it again.
Signed-off-by: Sami Wagiaalla <swagiaal@redhat.com>
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.
