On 15/03/16 12:23, Atin Mukherjee wrote:
On 03/15/2016 11:48 AM, Jiffin Tony Thottan wrote:
Hi all,
The subdir export is one of key features for NFS server. NFS-ganesha
have already supports subdir export,
but it has lot of limitations when it is intregrated with gluster.
Current Implementation :
Following steps are required for a subdir export
* export volume using ganesha.enable option
* edit the export configuration file by adding subdir options
* do refresh-config in that node using ganesha-ha.sh
* limitation : multiple directories cannot be exported at a time via
script.
If user to need to do that(it is possible), all the
steps should be done in manually
which includes creating export conf file, use latest
export id, include it in ganesha conf etc.
And also here it become mandatory to export root
before exporting subdir.
Suggested approach :
* Introduce new volume set command "ganesha.subdir" which will handle
above mentioned issue cleanly
for example, gluster volume set <volname> ganesha.subdir
<path1,path2,path3 ...>
if u want to unexport path2, use the same command with mentioning path2
gluster volume set <volname> ganesha.subdir <path1,path3 ...>.(Is
different option required ?)
How do you handle a case where you have to unexport all the paths?
The root of the volume should be export only using ganesha.enable
options.
This require a lot of additions in glusterd code base and minor
changes in snapshot functionality.
Could you detail out what all changes will be required in glusterd
codebase when volume set ganesha.subdir <list of path> is executed?
Based on that we can only take a call whether its feasible to take this
in 3.7.x or move it to 3.8.
This is just a rough estimation :
1.) glusterd/cli for introducing new option
2.) need to modify functions like ganesha_manage_export() to accommodate
new option
3.) changes related to ganesha scripts
4.) minor modification to snapshot
functionality(glusterd_copy_nfs_ganesha_file) for ganesha
approximately I expect around 100-150 lines of code to be added
--
Jiffin
Can above mentioned improvement targeted for 3.7.x release (3.7.10 or
3.7.11) or should I need to move it for 3.8 release ?
Please provide your valuable feedback on the same.
Please Note : It is not related to subdir export for fuse mount.
Regards,
Jiffin
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