Re: [vserver] How to use nfs mount between two VPSes ...

Thanks Herbert for trying to help me to work this out. Here is the
information you asked for about the util-vservers and kernel versions,
this is an output of the vserver-info:
==========================================================================================
Versions:
                   Kernel: 2.6.22.19-vs2.2.0.7
                   VS-API: 0x00020200
             util-vserver: 0.30.214; Apr 21 2008, 19:35:17

Features:
                       CC: gcc, gcc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-9)
                      CXX: g++, g++ (GCC) 3.4.6 20060404 (Red Hat 3.4.6-9)
                 CPPFLAGS: ''
                   CFLAGS: '-O2 -g -pipe -m64 -std=c99 -Wall -pedantic -W
-funit-at-a-time'
                 CXXFLAGS: '-O2 -g -pipe -m64 -ansi -Wall -pedantic -W
-fmessage-length=0 -funit-at-a-time'
               build/host: x86_64-redhat-linux-gnu/x86_64-redhat-linux-gnu
             Use dietlibc: yes
       Build C++ programs: yes
       Build C99 programs: yes
           Available APIs: v13,net,v21,v22,v23,netv2
            ext2fs Source: e2fsprogs
    syscall(2) invocation: alternative
      vserver(2) syscall#: 236/glibc
==========================================================================================

TIA,
Dragan Saragin

> On Thu, Jul 23, 2009 at 01:50:28PM -0500, Dragan Saraginov wrote:
>> Hi to all.
>>
>> I am trying to set up an nfs mount between two vservers on two different
>> physical servers. I added the following line to
>> '/etc/vservers/nfclient/fstab.remote
>>
>> xxx.xxx.xxx.xxx:/home /mnt/nfserver nfs defaults,rw 0 0
>>
>> On the nfs vserver I added this directory to '/etc/exports', next ran
>> the
>> 'exportsfs -a' command. I started the portmap service and bound it to
>> the
>> vserver's IP address by adding 'OPTIONS="-i yyy.yyy.yyy.yyy"' to its
>> configuration '/etc/sysconfig/portmap' file. Next I downloaded and
>> installed the unfs v3 from 'http://unfs3.sourceforge.net/'. Here is what
>> I
>
> no need to do userspace mounts, for your purpose, you can
> simply use the kernel nfs (but it doesn't really matter)
>
>> am getting when I ran 'rpcinfo -p yyy.yyy.yyy.yyy':
>>
>> program vers proto port
>> 100000 2 tcp 111 portmapper
>> 100000 2 udp 111 portmapper
>> 100024 1 udp 857 status
>> 100024 1 tcp 860 status
>> 100003 3 udp 2049 nfs
>> 100003 3 tcp 2049 nfs
>> 100005 1 udp 2049 mountd
>> 100005 3 udp 2049 mountd
>> 100005 1 tcp 2049 mountd
>> 100005 3 tcp 2049 mountd
>
> I'd be missing the lock manager here
>
>> But whenever I try to restart the client server at xxx.xxx.xxx.xxx the
>> restart is hanging a while and after that I am getting the following
>> error:
>
> did you try simply mounting the nfs export on the host,
> just to see if that works?
>
>> mount: yyy.yyy.yyy.yyy:/home: can't read superblock
>> /etc/vservers/nfclient/fstab.remote:1:1: failed to mount fstab-entry
>
> sounds strange, what util-vserver and kernel version?
>
>> Am I missing something? Can anyone help me with this issue?
>
> TIA,
> Herbert
>
>> TIA,
>> Dragan Saragin
>>
>>
>> > On Wed, Jul 22, 2009 at 09:54:12PM +0200, Dragan Saraginov wrote:
>> >> Thanks Herbert for the answers.
>> >>
>> >> What if the nfs vserver and the client vserver are on the
>> >> different physical servers?
>> >
>> > then it makes more sense to use nfs, and you can do that
>> > by simply putting the nfs mount in fstab.remote
>> >
>> > best,
>> > Herbert
>> >
>> >> Dragan
>> >>
>> >> Herbert Poetzl wrote:
>> >> >On Wed, Jul 22, 2009 at 12:23:53AM -0500, Dragan Saraginov wrote:
>> >> >
>> >> >>Hi to all. Can anyone here help me and point me to the right
>> >> >>direction on how to use nfs mount option in guest VPSes.
>> >> >>
>> >> >
>> >> >that is like mounting an nfs export on the same machine
>> >> >
>> >> >
>> >> >>The goal that need to be achieved is to mount a directories
>> >> >>between two guest on the same host.
>> >> >>
>> >> >
>> >> >
>> >> >for this, a --bind or --rbind mount is much simpler
>> >> >and a lot less resource consuming, not to speak of
>> >> >'more natural' to the system
>> >> >
>> >> >
>> >> >>But I do not want to add some additional capability to the
>> >> >>guests configuration. I want to use the 'fstab.remote' option.
>> >> >>
>> >> >
>> >> >no additional capabilities are required for that, and
>> >> >you can put the --bind and --rbind mounts into fstab
>> >> >or fstab.remote
>> >> >
>> >> >HTH,
>> >> >Herbert
>> >> >
>> >> >
>> >> >>TIA,
>> >> >>Dragan
>> >> >>
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