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Cloud Computing Learning Route Tutorial Outline Coursera: About NFS

Importance index 4 stars

Project name: Configuring backend storage for Web Server in cluster

NFS: Network File System, a protocol for sharing files between Unix systems

NFS clients are primarily Linux

Supports simultaneous mounting and concurrent writing of multiple nodes

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nas 192.168.122.59

web1 192.168.122.85

web2 192.168.122.166

web3 192.168.122.111

nas web1 web2 web3

sed -ri '/^SELINUX=/cSELINUX=disabled' /etc/selinux/configsetenforce 0

centos6

iptables -Fservice iptables save

centos7

systemctl stop firewalldsystemctl disable firewalldvim /etc/hosts [optional]

192.168.122.59 nas

192.168.122.85 web1

192.168.122.166 web2

192.168.122.111 web3

NFS

1. install software

yum -y install nfs-utils (main package provides file system)

yum -y install rpcbind (provides rpc protocol)

2. Start Services-----> Both services must be enabled at the same time

systemctl start nfs

systemctl start rpcbind

NAS (Storage)

[root@nas ~]# yum -y install nfs-utils

[root@nas ~]# mkdir /webdata //Store website code!

[root@nas ~]# echo "nfs test... " > /webdata/index.html

[root@nas ~]# vim /etc/exports

/webdata 192.168.122.0/24(rw,sync,no_root_squash) //do not suppress root(when the client uses root mount, it also has root privileges) mount root, and also maintain root privileges

[root@nas ~]# systemctl start nfs-server

[root@nas ~]# systemctl enable nfs-server

[root@nas ~]# exportfs -v

/webdata 192.168.122.0/24(rw,wdelay,no_root_squash,no_subtree_check,sec=sys,rw,secure,no_root_squash,no_all_squash)

his

Web1 Web 2 Web3 Client

Take web1 for example:

[root@web1 ~]# yum -y install nfs-utils httpd

[root@web1 ~]# systemctl start httpd

[root@web1 ~]# systemctl enable httpd

httpd

View storage-side shares [optional]

[root@web1 ~]# showmount -e nas

Export list for nas:

/webdata 192.168.122.0/24

ps -ef | grep nfs

Manual mount [optional]

[root@web1 ~]# mount -t nfs nas:/webdata /var/www/html/

[root@web1 ~]# umount /var/www/html/

Automatically mount to website home directory

[root@web1 ~]# vim /etc/fstab

nas:/webdata /var/www/html nfs defaults 0 0

[root@web1 ~]# mount -a

View mount

[root@web1 ~]# df

nas:/webdata 7923136 692416 6821568 10% /var/www/html

[root@web1 ~]# ls /var/www/html/

index.html

web2 web3 as above

Third, test website visit

firefox 192.168.122.85firefox 192.168.122.111firefox 192.168.122.166

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