Set up NFS Server on CentOS 6

Part 8 of setting up a Linux home lab environment with VirtualBox. Check this blog post for more info.

NFS server is used to make its data generally available to clients.

Software

Software used in this article:

  1. CentOS 6.7
  2. nfs-utils 1.2.3

Installation

# yum install nfs-utils nfs-utils-lib
# chkconfig nfs on 
# /etc/init.d/rpcbind start
# /etc/init.d/nfs start

Configuration

Our NFS server has a FQDN of spacewalk.hl.local and resides on 10.8.8.0/24 LAN.

Create a Logical Volume for NFS Shares

Check volume groups:

# vgs
  VG         #PV #LV #SN Attr   VSize   VFree
  vg_centos6   1   5   0 wz--n- 124.21g 77.34g

Create a 5GB logical volume named lv_nfs in theĀ vg_centos6 group, format as ext4 and mount on /mnt/nfs.

# lvcreate --name lv_nfs --size 5G vg_centos6
# mkfs.ext4 -m 0 /dev/mapper/vg_centos6-lv_nfs
# mkdir -p /mnt/nfs
# mount /dev/mapper/vg_centos6-lv_nfs /mnt/nfs
# mkdir -p /mnt/nfs/public
# chown nfsnobody:nfsnobody /mnt/nfs/public

Configure NFS exports:

# cat /etc/exports
/mnt/nfs/public  10.8.8.0/24(rw,sync,no_subtree_check,root_squash,all_squash)

Parameters that are used in our case:

  1. rw: allows both read and write requests on the NFS volume,
  2. sync: replies to requests only after the changes have been committed to stable storage,
  3. no_subtree_check: disables subtree checking,
  4. root_squash: maps requests from (root) uid/gid 0 to the nfsnobody uid/gid,
  5. all_squash: maps all uids and gids to the nfsnobody uid/gid.

Export the share:

# exportfs -rav
exporting 10.8.8.0/24:/mnt/nfs/public

Check:

# showmount -e
Export list for spacewalk.hl.local:
/mnt/nfs/public 10.8.8.0/24

Firewall

Allow NFS and rpcbind (portmapper) access from 10.8.8.0/24 LAN:

# iptables -A INPUT -s 10.8.8.0/24 -p tcp -m multiport --dport 111,2049 -j ACCEPT
# iptables -A INPUT -s 10.8.8.0/24 -p udp -m multiport --dport 111,2049 -j ACCEPT

NFS Client Configuration

Install NFS utilities and mount an NFS share.

# yum install nfs-utils nfs-utils-lib
# mkdir /mnt/public
# mount.nfs spacewalk.hl.local:/mnt/nfs/public /mnt/public

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