Issue #3688 has been reported by Ian Dall.
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Bug #3688: Can not overmount a mountpoint.
http://projects.puppetlabs.com/issues/3688
Author: Ian Dall
Status: Unreviewed
Priority: Normal
Assigned to:
Category:
Target version:
Affected version: 0.25.4
Keywords:
Branch:
I have diskless linux clients where /var/spool is mounted with type tmpfs. I
want to overmount (on certain clients) with and nfs mount.
The issue is that in type/mount.rb does:
provider.mount unless provider.mounted?
when ensure=>mounted.
Looking in provider/mount.rb, for the definition of provider.mounted, it just
checks for the / on #{name} / in the list of mounts. This succeeds no matter
what was mounted (in my case a tmpfs), even if it was completely unrelated to
the desired mount. On a refresh, the remount fails as well for slightly
different reasons: basically a remount will only change some mount options, not
completely change the mounted device and filesystem type.
I'm not sure what is correct here. While it might seem strange to want to do
this, the tmpfs mount comes earlier in the boot process and is not under
puppet's control. I general, it seems wrong for puppet's behaviour to depend on
how the underlying filesystem has been constructed. I think it would be
reasonable for provider.mounted to check both the device and the name to
determine if a mount is already mounted.
There are issues such as how to compare "devices" where one is an nfs "device"
with a short hostname and one a long hostname, or where one uses a symlink and
another doesn't. This is no different to problems which arise where the mount
point is a symlink. "Don't do that!" seems to be the answer.
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