#! /bin/bash

### centos_frontend-2of2.txt. The sequel of centos_frontend-1of2. This script is effective only after the frontend rebooted at the end of this script'

HOSTNAME=chakra

# Configure nfs server in the frontend (refer to https://www.itzgeek.com/how-tos/linux/centos-how-tos/how-to-setup-nfs-server-on-centos-7-rhel-7-fedora-22.html)

mkdir /export/share
chmod 777 /export/share
chmod 777 /export/share/home

mv /etc/exports /etc/exports.orig

node1='/export 192.168.1.21/24(rw,sync,no_root_squash)'
node2='/export 192.168.1.22/24(rw,sync,no_root_squash)'
node3='/export 192.168.1.23/24(rw,sync,no_root_squash)'
node4='/export 192.168.1.24/24(rw,sync,no_root_squash)'
node5='/export 192.168.1.25/24(rw,sync,no_root_squash)'
node6='/export 192.168.1.26/24(rw,sync,no_root_squash)'
node7='/export 192.168.1.27/24(rw,sync,no_root_squash)'
node8='/export 192.168.1.28/24(rw,sync,no_root_squash)'
node9='/export 192.168.1.29/24(rw,sync,no_root_squash)'

echo $node1 > /etc/exports
echo $node2 >> /etc/exports
echo $node3 >> /etc/exports
echo $node4 >> /etc/exports
echo $node5 >> /etc/exports
echo $node6 >> /etc/exports
echo $node7 >> /etc/exports
echo $node8 >> /etc/exports
echo $node9 >> /etc/exports

systemctl start nfs-server rpcbind
systemctl enable nfs-server rpcbind
exportfs -ra

#We need to configure the firewall on the NFS server to allow NFS client to access the NFS share. To do that, run the following commands on the NFS server.

firewall-cmd --permanent --add-service mountd
firewall-cmd --permanent --add-service rpc-bind
firewall-cmd --permanent --add-service nfs
firewall-cmd --reload


# creat a shared folder called /share/cluster
cd /
ln -s /export/share/ .
mkdir /share/cluster

### replace /etc/hosts by /share/cluster/hosts

cp /etc/hosts /etc/hosts.orig
mv /etc/hosts /share/cluster/
ln -s /share/cluster/hosts /etc/
echo 192.168.1.10 $HOSTNAME.local   $HOSTNAME >> /share/cluster/hosts
 
reboot