Re: NFS ganesha client not showing files after crash

[Jiffin Tony Thottan <jthottan@xxxxxxxxxx>]

On 06/06/16 08:20, Alan Hartless wrote:

Hi Jiffin,

Thanks! I have 3.7.11-ubuntu1~trusty1 installed and using NFSv4 mount protocols. 

Doing a forced lookup lists the root directories but shows 0 files in each.

Hi,

Sorry for the delayed reply.

You might need to do the explicit lookup on file as well. I tried above mentioned scenario in my set up.
For me ganesha and fuse mount works in same manner, lots of file/directories were missing. `ls` on
both mount results same output.

Another thing to be noted that effect of client side caching for nfs. Can you disable client cache by providing
"noac" option during mounting and try the same.

mount -t nfs -o noac ...

--

Regards
Jiffin

Thanks!

Alan

On Fri, Jun 3, 2016 at 3:09 AM Jiffin Tony Thottan <jthottan@xxxxxxxxxx> wrote:

Hi Alan,

I try to reproduce issue with my set up and get back to u.

can u please mention mount protocol and gluster package version(3.7-?)

Incase if u can't find /var/log/ganesha.log(it is default location for fedora and centos),
Just the system log messages and grep for ganesha.

Also can try to perform force lookup on directory using "ls <dirname>/* -ltr"

--
Jiffin

On 02/06/16 00:16, Alan Hartless wrote:

Yes, I had a brick that I restored and so it had existing files. After the crash, it wouldn't let me re-add it because it said the files were already part of a gluster. So I followed https://joejulian.name/blog/glusterfs-path-or-a-prefix-of-it-is-already-part-of-a-volume/ to reset it. 

Also correct that I can access all files through fuse but only the root directory via ganesha NFS4 or any directories/files that have since been created. 

Using a forced lookup on a specific file, I found that I can reach it and even edit it. But a ls or dir will not list it or any of it's parent directories. Even after editing the file, it does not list with ls. 

I'm using gluster 3.7 and ganesha 2.3 from Gluster's Ubuntu repositories. 

I don't have a /var/log/ganesha.log but I do /var/log/ganesha-gfapi.log. I tailed it while restarting ganesha and got this for the specific volume:

[2016-06-01 18:44:44.876385] I [MSGID: 114020] [client.c:2106:notify] 0-letsencrypt-client-0: parent translators are ready, attempting connect on transport

[2016-06-01 18:44:44.876903] I [MSGID: 114020] [client.c:2106:notify] 0-letsencrypt-client-1: parent translators are ready, attempting connect on transport

[2016-06-01 18:44:44.877193] I [rpc-clnt.c:1868:rpc_clnt_reconfig] 0-letsencrypt-client-0: changing port to 49154 (from 0)

[2016-06-01 18:44:44.877837] I [MSGID: 114057] [client-handshake.c:1437:select_server_supported_programs] 0-letsencrypt-client-0: Using Program GlusterFS 3.3, Num (1298437), Version (330)

[2016-06-01 18:44:44.878234] I [MSGID: 114046] [client-handshake.c:1213:client_setvolume_cbk] 0-letsencrypt-client-0: Connected to letsencrypt-client-0, attached to remote volume '/gluster_volume/letsencrypt'.

[2016-06-01 18:44:44.878253] I [MSGID: 114047] [client-handshake.c:1224:client_setvolume_cbk] 0-letsencrypt-client-0: Server and Client lk-version numbers are not same, reopening the fds

[2016-06-01 18:44:44.878338] I [MSGID: 108005] [afr-common.c:4007:afr_notify] 0-letsencrypt-replicate-0: Subvolume 'letsencrypt-client-0' came back up; going online.

[2016-06-01 18:44:44.878390] I [MSGID: 114035] [client-handshake.c:193:client_set_lk_version_cbk] 0-letsencrypt-client-0: Server lk version = 1

[2016-06-01 18:44:44.878505] I [rpc-clnt.c:1868:rpc_clnt_reconfig] 0-letsencrypt-client-1: changing port to 49154 (from 0)

[2016-06-01 18:44:44.879568] I [MSGID: 114057] [client-handshake.c:1437:select_server_supported_programs] 0-letsencrypt-client-1: Using Program GlusterFS 3.3, Num (1298437), Version (330)

[2016-06-01 18:44:44.880155] I [MSGID: 114046] [client-handshake.c:1213:client_setvolume_cbk] 0-letsencrypt-client-1: Connected to letsencrypt-client-1, attached to remote volume '/gluster_volume/letsencrypt'.

[2016-06-01 18:44:44.880175] I [MSGID: 114047] [client-handshake.c:1224:client_setvolume_cbk] 0-letsencrypt-client-1: Server and Client lk-version numbers are not same, reopening the fds

[2016-06-01 18:44:44.896801] I [MSGID: 114035] [client-handshake.c:193:client_set_lk_version_cbk] 0-letsencrypt-client-1: Server lk version = 1

[2016-06-01 18:44:44.898290] I [MSGID: 108031] [afr-common.c:1900:afr_local_discovery_cbk] 0-letsencrypt-replicate-0: selecting local read_child letsencrypt-client-0

[2016-06-01 18:44:44.898798] I [MSGID: 104041] [glfs-resolve.c:869:__glfs_active_subvol] 0-letsencrypt: switched to graph 676c7573-7465-7266-732d-6e6f64652d63 (0)

[2016-06-01 18:44:45.913545] I [MSGID: 104045] [glfs-master.c:95:notify] 0-gfapi: New graph 676c7573-7465-7266-732d-6e6f64652d63 (0) coming up

I also tailed it while accessing files through a mount point but nothing was logged.

This is the ganesha config for the specific volume I'm testing with. I have others but they are the same except for export ID and the paths.

EXPORT

{

    Export_Id = 3;

    Path = "/letsencrypt";

    Pseudo = "/letsencrypt";

    FSAL {

        name = GLUSTER;

        hostname = "localhost";

        volume = "letsencrypt";

    }

    Access_type = RW;

    Squash = No_root_squash;

    Disable_ACL = TRUE;

}

Many thanks!

On Sun, May 29, 2016 at 12:46 PM Jiffin Tony Thottan <jthottan@xxxxxxxxxx> wrote:

On 28/05/16 08:07, Alan Hartless wrote:

I had everything working well when I had a complete melt down :-) Well got all that sorted and everything back up and running or so I thought. Now NFS ganesha is not showing any existing files but the root level of the brick. It's empty for all subdirectories. New files or directories added show up as well. Everything shows up when using the fuse client. 

If I understand your issue correctly
* You have created a volume using brick which contains pre existing file and directories
* When you tried to access  the files via ganesha, it does not show up. But with fuse it is visible.

Can please try to perform force lookup on the directories/files(ls <path to directory/file>) from the ganesha mount?
Also check the ganesha logs (/var/log/ganesha.log and /var/log/ganesha-gfapi.log) for clues.
IMO there was similar issue exists for older version of ganesha(v2.1 I guess). if possible can you also share
the ganesha configuration for that volume

I've tried self healing, editing files, etc but the issue persists. If I move the folders and back, they show up. But I have a live setup and can't afford the time to move GBs of data to a new location and back. Is there anything I can do to trigger something for the files to show up in NFS again without having to move directories?

Thanks,

Alan

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