[openstack-dev] [Cinder] XXXFSDriver: Query on usage of load_shares_config in ensure_shares_mounted

Deepak Shetty dpkshetty at gmail.com
Fri Apr 11 11:54:27 UTC 2014


Hi,
   I am using the nfs and glusterfs driver as reference here.

I see that load_shares_config is called everytime via
_ensure_shares_mounted which I feel is incorrect mainly because
ensure_shares_mounted loads the config file again w/o restarting the service

I think that the shares config file should only be loaded once (during
service startup) as part of do_setup and never again.

If someone changes something in the conf file, one needs to restart service
which calls do_setup again and the changes made in shares.conf is taken
effect.

In looking further.. the ensure_shares_mounted ends up calling
remotefsclient.mount() which does _Nothing_ if the share is already
mounted.. whcih is mostly the case. So even if someone changed something in
the shares file (like added -o options) it won't take effect as the share
is already mounted & service already running.

In fact today, if you restart the service, even then the changes in share
won't take effect as the mount is not un-mounted, hence when the service is
started next, the mount is existing and ensures_shares_mounted just returns
w/o doing anything.

The only adv of calling load_shares_config in ensure_shares_mounted is if
someone changed the shares server IP while the service is running ... it
loads the new share usign the new server IP.. which again is wrong since
ideally the person should restart service for any shares.conf changes to
take effect.

Hence i feel callign load_shares_config in ensure_shares_mounted is
Incorrect and should be removed

Thoughts ?

thanx,
deepak
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