LVS Server Load balancer cluster + NAT shared storage service

LVS Load Balancing cluster + NAT Mode

NAT Mode

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I,BuildLVSServer Load balancer Cluster(Address translation modeLVS-NAT)

1. Configure the Network Environment

Web1: Enable route forwarding. Configure Gateway: route add default gw gateway 192.168.1.1

Web2: Enable route forwarding. Configure Gateway: route add default gw gateway 192.168.1.1

2. Configure the load Scheduler
1) Configure SNAT forwarding rules
[Root @ localhost ~] # Vim/etc/sysctl. conf
Net. ipv4.ip _ forward = 1
[Root @ localhost ~] # Sysctl-p
[Root @ localhost ~] # Iptables-t nat-a postrouting-s 192.168.1.0/24-o eth0-j SNAT -- to 200.0.0.1 // SNAT
[Root @ localhost ~] # Service iptables save // save the firewall policy
2) configure a load balancing policy
[Root @ localhost ~] # Rpm-ivh/misc/cd/Server/ipvsadm-* // install the ipvsadm package
[Root @ localhost ~] # Service ipvsadm stop // clear the original policy
[Root @ localhost ~] # Modprobe ip_vs
[Root @ localhost ~] # Echo "modprobe ip_vs">/etc/rc. local // automatically load upon startup
[Root @ localhost ~] # Ipvsadm-A-t 200.0.0.1: 80-s rr
[Root @ localhost ~] # Ipvsadm-a-t 200.0.0.1: 80-r 192.168.1.2: 80-m-w 1
[Root @ localhost ~] # Ipvsadm-a-t 200.0.0.1: 80-r 192.168.1.3: 80-m-w 1
[Root @ localhost ~] # Service ipvsadm save // save Policy
[Root @ localhost ~] # Chkconfig ipvsadm on

3. Configure the node Server
1) install httpd and create a test webpage (web Server 1)
[Root @ localhost ~] # Yum-y install httpd
[Root @ localhost ~] # Echo www.benet.com>/var/www/html/index.html
[Root @ localhost ~] # Service httpd start
[Root @ localhost ~] # Chkconfig httpd on
2) install httpd and create a test webpage (web Server 2)
[Root @ localhost ~] # Yum-y install httpd
[Root @ localhost ~] # Echo www.benet.com>/var/www/html/index.html
[Root @ localhost ~] # Service httpd start
[Root @ localhost ~] # Chkconfig httpd on

4. View LVS Load Distribution
[Root @ localhost ~] # Ipvsadm-Ln

II,NFSShared storage service

1.Use NFSPublish shared resources
1) install nfs-utils portmap (the system installed portmap before 6.0, and rpcbind after 6.0)
[Root @ localhost ~] # Yum-y install nfs-utils portmap

[Root @ localhost ~] # Chkconfig nfs on

[Root @ localhost ~] # Chkconfig portmap on

2) set the shared directory

Note: The shared directory is/opt/wwwroot/, and the network segment of NFS is 192.168.2.0/24. rw indicates that read/write is allowed.

Ro is read-only), sync indicates synchronous writing, and no_root_squash indicates that when the client accesses it as root

Grant the local root permission. The default value is root_squash)

[Root @ localhost ~] # Mkdir-p/opt/wwwroot

[Root @ localhost ~] # Vim/etc/exports

/Opt/wwwroot 192.168.2.0/24 (rw, sync, no_root_squash)

Note: To share the same directory with different clients and assign different permissions, use Spaces

Specify multiple Client permission options. For example, share the/var/ftp/public directory with two clients.

And read-only. Read and write permissions.

[Root @ localhost ~] # Vim/etc/exports

/Var/ftp/pub 192.168.2.10 (ro) 192.168.2.15 (rw) // assign different Permissions

3) Start the NFS service program

[Root @ localhost ~] # Service portmap start

[Root @ localhost ~] # Service nfs start

[Root @ localhost ~] # Netstart-natp | grep portmap

4) view the NFS shared directory released by the Local Machine

[Root @ localhost ~] # Showmount-e

2.In the webAccess NFS on the serverShared resources (Or client)

1) install the portmap package and start the portmap service. Note: After 6.0, the system installs the rpcbind package.

[Root @ localhost ~] # Yum-y install portmap

[Root @ localhost ~] # Chkconfig portmap on

[Root @ localhost ~] # Service portmap start

Note: If the nfs-utils package is installed, you can use showmount-e to view the shared directory of the NFS server.

[Root @ localhost ~] # Showmount-e

2) manually mount the NFS shared directory

[Root @ localhost ~] # Mount 192.168.2.1:/opt/wwwroot/var/www/html

[Root @ localhost ~] # Echo "hello">/var/www/html/index.html // create a test webpage

3) fstab automatic mounting settings

[Root @ localhost ~] # Vim/etc/fstab

192.168.2.1:/opt/wwwroot nfs/var/www/html ults, _ netdev 0 0