[Gluster-users] [Nfs-ganesha-devel] Questions on ganesha HA and shared storage size
Alessandro De Salvo
Alessandro.DeSalvo at roma1.infn.it
Fri Jun 12 12:34:05 UTC 2015
Hi,
looking at the code and having recompiled adding some more debug, I
might be wrong, but it seems that in nfs_rpc_dispatcher_thread.c,
fuction nfs_rpc_dequeue_req, the threads enter the while (!(wqe->flags &
Wqe_LFlag_SyncDone)) and never exit from there.
I do not know if it's normal or not as I should read better the code.
Cheers,
Alessandro
On Fri, 2015-06-12 at 09:35 +0200, Alessandro De Salvo wrote:
> Hi Malahal,
>
>
> > Il giorno 12/giu/2015, alle ore 01:23, Malahal Naineni <malahal at us.ibm.com> ha scritto:
> >
> > The logs indicate that ganesha was started successfully without any
> > exports. gstack output seemed normal as well -- threads were waiting to
> > serve requests.
>
> Yes, no exports as it was the default config before enabling Ganesha on any gluster volume.
>
> >
> > Assuming that you are running "showmount -e" on the same system, there
> > shouldn't be any firewall coming into the picture.
>
> Yes it was the case in my last attempt, from the same machine. I also tried from another machine, but the result was the same. The firewall (firewalld, as it's a CentOS 7.1) is disabled anyways.
>
> > If you are running
> > "showmount" from some other system, make sure there is no firewall
> > dropping the packets.
> >
> > I think you need tcpdump trace to figure out the problem. My wireshark
> > trace showed two requests from the client to complete the "showmount -e"
> > command:
> >
> > 1. Client sent "GETPORT" call to port 111 (rpcbind) to get the port number
> > of MOUNT.
> > 2. Then it sent "EXPORT" call to mountd port (port it got in response to #1).
>
> Yes, I did it already, and indeed it showed the two requests, so the portmapper works fine, but it hangs on the second request.
> Also "rpcinfo -t localhost portmapper" returns successfully, while "rpcinfo -t localhost nfs" hangs.
> The output of rpcinfo -p is the following:
>
> program vers proto port service
> 100000 4 tcp 111 portmapper
> 100000 3 tcp 111 portmapper
> 100000 2 tcp 111 portmapper
> 100000 4 udp 111 portmapper
> 100000 3 udp 111 portmapper
> 100000 2 udp 111 portmapper
> 100024 1 udp 56082 status
> 100024 1 tcp 41858 status
> 100003 3 udp 2049 nfs
> 100003 3 tcp 2049 nfs
> 100003 4 udp 2049 nfs
> 100003 4 tcp 2049 nfs
> 100005 1 udp 45611 mountd
> 100005 1 tcp 55915 mountd
> 100005 3 udp 45611 mountd
> 100005 3 tcp 55915 mountd
> 100021 4 udp 48775 nlockmgr
> 100021 4 tcp 51621 nlockmgr
> 100011 1 udp 4501 rquotad
> 100011 1 tcp 4501 rquotad
> 100011 2 udp 4501 rquotad
> 100011 2 tcp 4501 rquotad
>
> >
> > What does "rpcinfo -p <server-ip>" show?
> >
> > Do you have selinux enabled? I am not sure if that is playing any role
> > here...
>
> Nope, it's disabled:
>
> # uname -a
> Linux node2 3.10.0-229.4.2.el7.x86_64 #1 SMP Wed May 13 10:06:09 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
>
>
> Thanks for the help,
>
> Alessandro
>
> >
> > Regards, Malahal.
> >
> > Alessandro De Salvo [Alessandro.DeSalvo at roma1.infn.it] wrote:
> >> Hi,
> >> this was an extract from the old logs, before Soumya's suggestion of
> >> changing the rquota port in the conf file. The new logs are attached
> >> (ganesha-20150611.log.gz) as well as the gstack of the ganesha process
> >> while I was executing the hanging showmount
> >> (ganesha-20150611.gstack.gz).
> >> Thanks,
> >>
> >> Alessandro
> >>
> >>
> >>
> >>> On Thu, 2015-06-11 at 11:37 -0500, Malahal Naineni wrote:
> >>> Soumya Koduri [skoduri at redhat.com] wrote:
> >>>> CCin ganesha-devel to get more inputs.
> >>>>
> >>>> In case of ipv6 enabled, only v6 interfaces are used by NFS-Ganesha.
> >>>
> >>> I am not a network expert but I have seen IPv4 traffic over IPv6
> >>> interface while fixing few things before. This may be normal.
> >>>
> >>>> commit - git show 'd7e8f255' , which got added in v2.2 has more details.
> >>>>
> >>>>> # netstat -ltaupn | grep 2049
> >>>>> tcp6 4 0 :::2049 :::*
> >>>>> LISTEN 32080/ganesha.nfsd
> >>>>> tcp6 1 0 x.x.x.2:2049 x.x.x.2:33285 CLOSE_WAIT
> >>>>> -
> >>>>> tcp6 1 0 127.0.0.1:2049 127.0.0.1:39555
> >>>>> CLOSE_WAIT -
> >>>>> udp6 0 0 :::2049 :::*
> >>>>> 32080/ganesha.nfsd
> >>>>
> >>>>>>> I have enabled the full debug already, but I see nothing special. Before exporting any volume the log shows no error, even when I do a showmount (the log is attached, ganesha.log.gz). If I do the same after exporting a volume nfs-ganesha does not even start, complaining for not being able to bind the IPv6 ruota socket, but in fact there is nothing listening on IPv6, so it should not happen:
> >>>>>>>
> >>>>>>> tcp6 0 0 :::111 :::* LISTEN 7433/rpcbind
> >>>>>>> tcp6 0 0 :::2224 :::* LISTEN 9054/ruby
> >>>>>>> tcp6 0 0 :::22 :::* LISTEN 1248/sshd
> >>>>>>> udp6 0 0 :::111 :::* 7433/rpcbind
> >>>>>>> udp6 0 0 fe80::8c2:27ff:fef2:123 :::* 31238/ntpd
> >>>>>>> udp6 0 0 fe80::230:48ff:fed2:123 :::* 31238/ntpd
> >>>>>>> udp6 0 0 fe80::230:48ff:fed2:123 :::* 31238/ntpd
> >>>>>>> udp6 0 0 fe80::230:48ff:fed2:123 :::* 31238/ntpd
> >>>>>>> udp6 0 0 ::1:123 :::* 31238/ntpd
> >>>>>>> udp6 0 0 fe80::5484:7aff:fef:123 :::* 31238/ntpd
> >>>>>>> udp6 0 0 :::123 :::* 31238/ntpd
> >>>>>>> udp6 0 0 :::824 :::* 7433/rpcbind
> >>>>>>>
> >>>>>>> The error, as shown in the attached ganesha-after-export.log.gz logfile, is the following:
> >>>>>>>
> >>>>>>>
> >>>>>>> 10/06/2015 02:07:47 : epoch 55777fb5 : node2 : ganesha.nfsd-26195[main] Bind_sockets_V6 :DISP :WARN :Cannot bind RQUOTA tcp6 socket, error 98 (Address already in use)
> >>>>>>> 10/06/2015 02:07:47 : epoch 55777fb5 : node2 : ganesha.nfsd-26195[main] Bind_sockets :DISP :FATAL :Error binding to V6 interface. Cannot continue.
> >>>>>>> 10/06/2015 02:07:48 : epoch 55777fb5 : node2 : ganesha.nfsd-26195[main] glusterfs_unload :FSAL :DEBUG :FSAL Gluster unloaded
> >>>
> >>> The above messages indicate that someone tried to restart ganesha. But
> >>> ganesha failed to come up because RQUOTA port (default is 875) is
> >>> already in use by an old ganesha instance or some other program holding
> >>> it. The new instance of ganesha will die, but if you are using systemd,
> >>> it will try to restart automatically. We have disabled systemd auto
> >>> restart in our environment as it was causing issues for debugging.
> >>>
> >>> What version of ganesha is this?
> >>>
> >>> Regards, Malahal.
> >
> >
> >
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