====== NFS Shares ======

**General Information**

Creating NFS shares on a server and connecting to them via a client. 

**Checklist**
  * Distro(s): Enterprise Linux 7
  * Other: Two systems (server and client)

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====== NFS Server Setup ======

  * Install required package<code bash>yum install nfs-utils</code>
  * Start and enable the NFS Server<code bash>systemctl start nfs-server
systemctl enable nfs-server</code>
  * Create your share directory structure<code bash>mkdir -p /data/share1</code>
  * Create an export line to share the directory<code bash>vim /etc/exports

/data/share1  192.168.1.0/24(rw)</code>
    * /data/share1 => the directory to share
    * 192.168.1.0/24(rw) => share to entire network with read/write.
      * Other ways to share are to specify single hostnames(short, fqdn, single ip), IP networks (as shown), hostnames/domains with wildcards (*.mydomain.edu). See man exports for more details.
  * If a firewall is running, allow nfs, rpc-bind, and mountd<code bash>firewall-cmd --permanent --add-service=nfs
firewall-cmd --permanent --add-service=rpc-bind
firewall-cmd --permanent --add-service=mountd
firewall-cmd --reload</code>
    * nfs (tcp/udp 2049) => needed for NFSv4
    * rpc-bind (tcp/udp 111) => needed for NFSv3 compatibility and for showmount to work from client
    * mountd (tcp/udp 20048) => needed for the "showmount -e hostname" command to work from a client

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===== NFS Server: Increasing NFS Threads =====

To increase NFS server performance, it is usually necessary to increase the number of NFS daemon processes running. (The default is very small at 8.)

  * CentOS 7
    * Edit the following config file<code bash>vim /etc/sysconfig/nfs

# Number of nfs server processes to be started.
# The default is 8.
RPCNFSDCOUNT=16
</code>
    * Restart the nfs-config service<code bash>systemctl restart nfs-config</code>
    * Restart the nfs service<code bash>systemctl restart nfs-server</code>
    * Verify
      * NFS running sysconfig (takes effect after nfs-config restart)<code bash>cat /run/sysconfig/nfs-utils
RPCNFSDARGS=" 16"</code>
      * "th" line in proc (number after 'th' is number of processes)<code bash>grep th /proc/net/rpc/nfsd
th 16 0 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000</code>
      * Running processes<code bash>ps -elf | grep nfsd] | grep -v grep | wc -l
16</code>

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====== NFS Client Setup ======

  * Install required package<code bash>yum install nfs-utils</code>
  * View available mounts on NFS Server<code bash>showmount -e fileserver01

Export list for fileserver01:
/data/share1 192.168.1.0/24</code>
  * Mount temporarily<code bash>mount -t nfs fileserver01:/data/share1 /mnt</code>
  * Mount persistently<code bash>vim /etc/fstab

## NFS Shares ##
fileserver01:/data/share1  /remote  nfs  _netdev  0 0</code>
    * _netdev => Mount option to skip mounting this location until the network is available.

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