Re: 16+ GID issue, mountd's --manage-gids not helping

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Hello,

I was assuming it would grab all of my GIDs as it appears to do in the
following link:
https://xkyle.com/solving-the-nfs-16-group-limit-problem/

Just under the quote:
"Also, the NFS server will cache group lookups so it doesn’t have to
continuously make queries. The cache is visible like this:"

The GID 1000 is my primary user on both boxes (rypervenche).

If there is another way to do this (aside maybe from setting up
kerberos/ldap) I would be willing to try that.

Thank you.


On Mon, 16 Sep 2013 15:37:09 -0400
"J. Bruce Fields" <bfields@xxxxxxxxxxxx> wrote:

> On Mon, Sep 16, 2013 at 09:43:51AM -0500, Contact wrote:
> > Hi all,
> > 
> > I'm having an issue with my NFS mount and being able to access it
> > from my normal user account. The mount point is chmod'ed to 2770
> > with a GID of 1100 (nfs) which is the same on both systems. I can
> > access it if I change my active group using newgrp, but not
> > normally.
> > 
> > ====================================
> > noir ~ # ls -lhd /home/nfs/share
> > drwxrws--- 8 nfs nfs 4.0K Sep  4 15:30 /home/nfs/share
> > 
> > rypervenche@svelte ~ $ pwd
> > /home/rypervenche
> > rypervenche@svelte ~ $ cd nfs
> > -su: cd: nfs: Permission denied
> > rypervenche@svelte ~ $ newgrp nfs
> > rypervenche@svelte ~ $ cd nfs
> > rypervenche@svelte ~/nfs $ 
> > 
> > svelte ~ # grep nfs /etc/group
> > nfs:x:1100:rypervenche
> > ====================================
> > 
> > You can find the details of my NFS server and client here:
> > 
> > ====================================
> > svelte = client
> > noir = server
> > 
> > svelte ~ # tail -1 /etc/fstab
> > 192.168.1.100:/ /home/rypervenche/nfs   nfs
> > rw,noauto,noexec,nodev,nosuid   0       0
> > 
> > noir ~ # cat /etc/exports 
> > # /etc/exports: NFS file systems being exported.  See exports(5).
> > /home/nfs/share
> > 192.168.1.205(rw,sync,fsid=0,no_root_squash,no_subtree_check)
> > 192.168.2.100(rw,sync,fsid=0,no_root_squash,no_subtree_check)
> > 
> > noir ~ # id nfs
> > uid=1100(nfs) gid=1100(nfs) groups=1100(nfs)
> > 
> > noir ~ # grep -v ^# /etc/conf.d/nfs | grep -v ^$
> > NFS_NEEDED_SERVICES="rpc.idmapd"
> > OPTS_RPC_NFSD="8"
> > OPTS_RPC_MOUNTD="-V 4 --manage-gids -p 32767"
> > OPTS_RPC_STATD="-p 32765 -o 32766"
> > OPTS_RPC_IDMAPD=""
> > OPTS_RPC_GSSD=""
> > OPTS_RPC_SVCGSSD=""
> > OPTS_RPC_RQUOTAD=""
> > EXPORTFS_TIMEOUT=30
> > 
> > noir ~ # iptables-save | egrep '(NFS|T -m conn)'
> > -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
> > -A INPUT -s 192.168.1.205/32 -p tcp -m tcp -m multiport --dports
> > 111,2049,4001,32765:32767 -m conntrack --ctstate NEW -m comment
> > --comment NFS -j ACCEPT -A INPUT -s 192.168.1.205/32 -p udp -m udp
> > -m multiport --dports 111,2049,4001,32765:32767 -m conntrack
> > --ctstate NEW -m comment --comment NFS -j ACCEPT -A INPUT -s
> > 192.168.2.100/32 -p tcp -m tcp -m multiport --dports
> > 111,2049,4001,32765:32767 -m conntrack --ctstate NEW -m comment
> > --comment NFS -j ACCEPT -A INPUT -s 192.168.2.100/32 -p udp -m udp
> > -m multiport --dports 111,2049,4001,32765:32767 -m conntrack
> > --ctstate NEW -m comment --comment NFS -j ACCEPT
> > 
> > svelte:
> > net-fs/nfs-utils-1.2.6 was built with the following:
> > USE="ipv6 nfsdcld nfsidmap nfsv4 nfsv41 tcpd -caps -kerberos
> > (-selinux)"
> > 
> > noir:
> > net-fs/nfs-utils-1.2.6 was built with the following:
> > USE="ipv6 (multilib) nfsdcld nfsidmap nfsv4 nfsv41 tcpd -caps
> > -kerberos (-selinux)" ABI_X86="64"
> > 
> > svelte ~ # uname -a
> > Linux svelte 3.10.7-gentoo-svelte #1 SMP Thu Aug 22 17:46:44 CDT
> > 2013 i686 Intel(R) Atom(TM) CPU N450 @ 1.66GHz GenuineIntel
> > GNU/Linux
> > 
> > noir ~ # uname -a
> > Linux noir 3.10.7-gentoo-noir #1 SMP Wed Aug 28 11:19:43 CDT 2013
> > x86_64 AMD Athlon(tm) II X2 260 Processor AuthenticAMD GNU/Linux
> > ====================================
> > 
> > 
> > I found online that the issue is due to NFS not being able to grab
> > over 16 GIDs. I found help in the following two links:
> > 
> > https://xkyle.com/solving-the-nfs-16-group-limit-problem/
> > https://wiki.archlinux.org/index.php/NFS_Troubleshooting
> > 
> > I tried adding the --manage-gids flag to mountd (which can be seen
> > in the /etc/conf.d/nfs file above), however, it does not appear to
> > resolve the issue.
> > 
> > ====================================
> > noir ~ #
> > cat /proc/net/rpc/auth.unix.gid/content #uid cnt: gids...
> > 0 10: 0 1 2 3 4 6 10 11 26 27
> > 1000 9: 10 18 19 27 78 85 100 250 1000
> > 
> > noir ~ # date +%s > /proc/net/rpc/auth.unix.gid/flush     
> >                                                                                                                               
> > noir ~ #
> > cat /proc/net/rpc/auth.unix.gid/content #uid cnt: gids...
> > 
> > Then I mount the NFS again:
> > 
> > noir ~ # cat /proc/net/rpc/auth.unix.gid/content
> > #uid cnt: gids...
> > 0 10: 0 1 2 3 4 6 10 11 26 27
> > 1000 9: 10 18 19 27 78 85 100 250 1000
> > ====================================
> > 
> > It looks as though it is not grabbing all of my GIDs.
> 
> What do you expect the list to be?  Which groups is uid 1000 a member
> of on the server?
> 
> --b.

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