On 5/16/19 1:42 PM, Ian Kent wrote:
On Thu, 2019-05-16 at 12:53 +0200, Frank Thommen wrote:
On 5/16/19 3:01 AM, Ian Kent wrote:
On Wed, 2019-05-15 at 18:00 +0200, Frank Thommen wrote:
Dear all,
the autofs manpages says:
"If an indirect map is modified then the change will become
effective immediately. If an indirect map uses the browse option, the
master map contains direct mount maps or the auto.master map is modified
then the autofs service control reload action must be rerun to activate
the changes."
However this doesn't seem true when using multi-maps:
In /etc/auto.master:
/base/data /etc/auto.data
In /etc/auto.data:
# section 1
#
p1 -fstype=nfs,vers=3,sec=sys srv:/export/p1
p2 -fstype=nfs,vers=3,sec=sys srv:/export/p2
# section 2
#
others -fstype=nfs,vers=3,sec=sys \
/p3 srv:/export/p2 \
/p4 srv:/export/p4
When adding an entry
p5 -fstype=nfs,vers=3,sec=sys srv:/export/p5
in section 1, I can immediately change into /base/data/p2 and it is
mounted. All well. But when I add an entry
/p5 srv:/export/p5
to section 2, then this new entry is not accessible as
/base/data/others/p5 even after a `systemctl reload autofs`. autofs has
to be completely restarted. Unfortunately we've had many issues
(crashes) with clusterjobs accessing NFS shares during autofs restarts.
That's why we'd like to avoid complete autofs restart whenever possible.
Yes, on restart there is a window of time where automounting won't
be happening.
That can be a problem and there's little I can do about it
but existing mounts should continue to function fine.
If you have an environment that's busy enough to get caught by
this then you have no choice but to avoid restarts.
I wouldn't have problems avoiding starts if the reload refreshed the
multi-mount maps.
Tell me more about the topology of your multi-mount map entries?
Perhaps you could use a direct mount map instead for these entries,
they should update fine on reload?
The problem you may have is that the paths can't be within an
indirect mount as the multi-mount entries.
I will send you the topology and the concrete automounter maps to your
personal mailbos assuming that you agree to non-disclosure. Our data
privacy rules are quite strict.
Can you confirm that multi-maps are not updated by autofs reloads and/or
is there a way to achieve this?
I call these multi-mounts because there's a different construct
I call multi-maps.
the autofs(5) manpage calls them "multi-map" in the "EXAMPLES" section
and "multi-mount map" in the "FEATURES" section. That might be a point
for the "Future changes to documentation" thread?
Yes, I see that, I'll fix that.
Ian
frank
