What's the best way to make autofs aware of any changes to its map files (e.g. changes in
auto.home below) without the need to stop the service on RHEL 6.7?
According to autofs man page
If a map is modified then the change will become effective immediately. If the auto.master map is modified then the autofs script must be rerun to activate the changes.
However, if I change my
auto.home the changes are not automatically seen by autofs. In addition, if I then run
service autofs reload the changes are still not seen. The changes become effective only after I run
service autofs restart. However, this would require all the users to stop working on any NFS-shared folders until the restart of the service completes.
Shouldn't the changes take effect automatically or at least after I run
service autofs reload? What am I doing wrong here?
See below for the configuration I use:
I have the following simple configuration on two RedHat Linux 6.7 machines, one is acting as the NFS server and the second as the client.
$ cat /etc/exports /home/user1/NFS-test *(rw,sync) /home/user2/NFS-test *(rw,sync)
$ cat /etc/auto.master /misc /etc/auto.misc /net -hosts /- /etc/auto.home --temeout=300 +auto.master $ cat /etc/auto.home /home/user1/NFS-test -ro,soft,intr server:/home/user1/NFS-test /home/user2/NFS-test -ro,soft,intr server:/home/user2/NFS-test
This works fine and both users (
user2) are able to see their own
NFS-test directory under their home folder on the client machine.
Now the second line is removed from
auto.home such that
$ cat /etc/auto.home /home/user1/NFS-test -ro,soft,intr server:/home/user1/NFS-test
Then I run
service autofs reload in order to update the shares. However, the change in
auto.home is not seen and
/home/user2/NFS-test continues to be accessible from the client machine.
If on the other hand I run
service autofs restart then the mapping is correctly updated
/home/user2/NFS-test is not visible on the client.
I would like to be able to refresh the NFS shares in response to changes in
auto.home without needing to stop autofs first in order to avoid asking all the users to logout first. Is this possible with
reload? Is there another way for doing this?
Since my setup is relatively small (1 server and 3 clients) and with only two folders being exported (one read-only and one read-write), I decided to drop the use of
autofs and use directly NFS by editing
/etc/fstab on each client. For such a small setup I hope that there won't be any noticable difference in performance compared to
autofs. If someone thinks otherwise, please let me know.
In case someone is interested, here is the setup I went for:
The server exports the following folders:
/export: where all the software will be located (read-only)
/home/shared_homes: here each user has a folder which is exported to all clients and which is automatically linked in to its home directory. For example, the user
bob101will have a folder
/home/shared_homes/bob101which will be linked to