Re: [MooseFS-Users] mfsmaster config reload breaks client mounts?

[Aleksander W. <ale...@mo...>]

Hi,
I have another question for you.
Do you use some extra mount options or automount entries for systemd in 
fstab?

Best regards
Aleksander Wieliczko
Technical Support Engineer
MooseFS.com

On 14.09.2016 22:29, Wilson, Steven M wrote:
>
> Hi Aleksander,
>
>
> I needed to add another line to mfsexports.cfg today.  I didn't change 
> any existing lines; I just added the following line:
>
>     10.163.216.88   /       rw,alldirs,maproot=0
>
>
> After adding this line, I took a deep breath and then sent a HUP 
> signal to the mfsmaster process.  ​Rats...  all the clients for that 
> MooseFS server immediately had empty mount points.
>
>
> This occurred on a different MooseFS master server than the one 
> mentioned in my original email.  The version of this mfsmaster is 
> 3.0.78.  This time I did not use Ansible but instead manually edited 
> the mfsexports.cfg file and manually sent a HUP signal to mfsmaster 
> process.
>
>
> Unfortunately, this looks like a reproducible problem in my 
> environment and not just a one-time fluke.
>
>
> Is there any additional information that I can send to be of help to 
> you? The clients and server are running on Ubuntu 16.04.
>
>
> Best regards,
>
> Steve
>
>
> ------------------------------------------------------------------------
> *From:* Wilson, Steven M <st...@pu...>
> *Sent:* Monday, September 12, 2016 9:28 AM
> *To:* Aleksander Wieliczko; Krzysztof Kielak
> *Cc:* MooseFS-Users
> *Subject:* Re: [MooseFS-Users] mfsmaster config reload breaks client 
> mounts?
>
> ​Hi Aleksander,
>
>
> Thanks for attempting to reproduce the problem in your environment. 
>  I'll send the mfsexports.cfg files to you (prior to the change and 
> after the change).  I use Ansible for configuration management and I 
> normally make all changes on my Ansible server in a file of my own 
> format that is then used to build mfsexports.cfg files on each MooseFS 
> master server.  So I'll also send the script that Ansible calls to 
> build the mfsexports.cfg file and issue a HUP signal to mfsmaster.
>
>
> Thanks,
>
>
> Steve
>
>
> ------------------------------------------------------------------------
> *From:* Aleksander Wieliczko <ale...@mo...>
> *Sent:* Monday, September 12, 2016 6:25 AM
> *To:* Wilson, Steven M; Krzysztof Kielak
> *Cc:* MooseFS-Users
> *Subject:* Re: [MooseFS-Users] mfsmaster config reload breaks client 
> mounts?
> Hi,
>
> I would like to inform you that we are not able to reproduce this 
> problem in our development environment.
> Also I would like to add that in MooseFS is scenario which can cause 
> mfsmount session drop.
> When you change permissions in mfsexports.cfg file for connected 
> mounts and you send HUP signal, MooseFS master will check permissions 
> again, and if permissions have been changed access to cluster will be 
> denied.
>
> We have another question for you.
> Can you send us old and new "mfsexports.cfg" files, so we will be able 
> to understand what had happened?
>
> You can send itto dwt[at]moosefs.com
>
> Best regards
> Aleksander Wieliczko
> Technical Support Engineer
> MooseFS.com <moosefs.com>