Installing NFS on new cluster

I used these guides for installing NFSv4 [https://www.suse.com/communities/conversations/configuring-nfsv4-server-and-client-suse-linux-enterprise-server-10/] and [https://help.ubuntu.com/community/NFSv4Howto].

==NFS File server installation==
The storage servers nfs1 and nfs2 acts as NFS file servers. The NFS server software has been installed on these machines.

Here is how the storage and compute servers has been configured.


Create mount points for NFS directories on all servers:
 sudo mkdir /image
 sudo mkdir /image/data1
 sudo mkdir /image/data2
 sudo mkdir /image/data3


===Configuring firewall===
On both nfs1 and nfs2 allow NFS server and client ports open using YaST2:
  /sbin/yast2
 

===Mounting disks locally===


====nfs2====
Create NFSv4 virtual file system:
 sudo mkdir /exports
 sudo mkdir /exports/users
 sudo mkdir /exports/data1
 sudo mount -t xfs /dev/mapper/vg0-user_1 /home/SCIENCE
 sudo mount -t xfs /dev/mapper/vg1-user_2 /image/data1


In /etc/fstab add
 /dev/mapper/vg0-user_1             /home/SCIENCE     xfs   defaults        1 2
 /dev/mapper/vg1-user_2             /image/data1     xfs   defaults        1 2
 nfs1-diku-image.science.ku.dk:/data2      /image/data2    nfs4    defaults 0 0
 nfs1-diku-image.science.ku.dk:/data3      /image/data3    nfs4    defaults 0 0

====nfs1====
Create NFSv4 virtual file system:
 sudo mkdir /exports
 sudo mkdir /exports/data2
 sudo mkdir /exports/data3
 sudo mount -t xfs /dev/mapper/vg0-user_1 /image/data2
 sudo mount -t xfs /dev/mapper/vg1-user_2 /image/data3

In /etc/fstab add
 /dev/mapper/vg0-user_1            /image/data2     xfs   defaults        1 2
 /dev/mapper/vg1-user_2            /image/data3     xfs   defaults        1 2
 nfs2-diku-image.science.ku.dk:/data1      /image/data1    nfs4    defaults 0 0
 nfs2-diku-image.science.ku.dk:/users      /home/SCIENCE   nfs4    defaults 0 0

===Setting up NFS server===
Using YaST2 gui tool for the installation:
 sudo /sbin/yast2

Select NFSv4 and open the firewall.

Select Network services->NFS server and configure it with (configured in /etc/exports):

On nfs1-diku-image.science.ku.dk:
 /exports        130.226.12.0/255.255.255.0(rw,fsid=0,crossmnt,no_root_squash,sync,no_subtree_check)
 /exports/data2  130.226.12.0/255.255.255.0(rw,bind=/image/data2,no_root_squash,sync,no_subtree_check)
 /exports/data3  130.226.12.0/255.255.255.0(rw,bind=/image/data3,no_root_squash,sync,no_subtree_check)

On nfs2-diku-image.science.ku.dk:
 /exports        130.226.12.0/255.255.255.0(rw,fsid=0,crossmnt,no_root_squash,sync,no_subtree_check)
 /exports/users  130.226.12.0/255.255.255.0(rw,bind=/home/SCIENCE,no_root_squash,sync,no_subtree_check)
 /exports/data1  130.226.12.0/255.255.255.0(rw,bind=/image/data1,no_root_squash,sync,no_subtree_check)

Select Network services->NFS client and configure it to enable all the nfs client daemons.

==NFS client installation on compute servers==
Using YaST2 gui tool for the installation:
 sudo /sbin/yast2

Setup the firewall to allow for NFS client ports open.

Select Network services->NFS client and configure it with (configured in /etc/fstab):
 nfs2-diku-image.science.ku.dk:/users      /home           nfs4    defaults 0 0
 nfs2-diku-image.science.ku.dk:/data1      /image/data1    nfs4    defaults 0 0
 nfs1-diku-image.science.ku.dk:/data2      /image/data2    nfs4    defaults 0 0
 nfs1-diku-image.science.ku.dk:/data3      /image/data3    nfs4    defaults 0 0

The idmapd daemon must also be configured by setting /etc/idmapd.conf to:
 [General]

 Verbosity=0
 Pipefs-Directory=/var/lib/nfs/rpc_pipefs
 Domain=science.ku.dk

 [Mapping]

 Nobody-User=nobody
 Nobody-Group=nobody

To make the idmapd daemon read the new configuration do:
 sudo killall -HUP rpc.idmapd