Linux LVS load Balancing NAT mode

The Linux LVs load Balancing is mainly used to improve the processing power of the server, improve the corresponding ability of the server, improve the concurrency processing ability, and reasonable resource allocation.

Address translation: referred to as NAT mode, similar to the firewall of the private network structure, the load scheduler as a gateway to all server nodes, that is, as a client access to the portal, but also the nodes to respond to the client's access exits. The server node uses a private IP address. In the same physical network as the load scheduler, security is superior to the other two , but performance is not very good because the scheduler provides both ingress and egress.

LVS is now part of the LINUX kernel, which is compiled by default as a ip_vs module, manually loading IP _vs module and view The version information of the Ip_vs module in the current system.

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Install the ipvsadm-1.25-9 package.

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Configure the SNAT forwarding policy: Modify the sysctl.conf file, turn on routing forwarding, and make the changes effective in Nat of the table postrouting create on Rule chain SNAT policy.

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1) To Configure a load distribution policy:

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2) Configure the shared storage service on the shared storage device host (using the NFS Publishing Sharing service here), as follows:

nfs Implementation of the service depends on rpc ( remote   Process  call rhel6 system, you need to install   Span style= "FONT-FAMILY:CALIBRI;" >nfs-utils rpcbind Span style= "font-family: ' The song Body '; > package to provide nfs Shared service, which is used for Span style= "FONT-FAMILY:CALIBRI;" >nfs shared publishing and access, which is used for rpc Span style= "font-family: ' The song Body '; > support

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The specific configuration of the/etc/exports configuration file is as follows:

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  where the client address can be a hostname, ip address, network segment address, allow use * wildcard; in the permissions option, RW means allow read and write ( ro sync means synchronous writing, no_root_squash root identity access is given to the local root permissions

Restart Rpcbind and NFS services:

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The two node servers only need to install the Apacheck server and connect to the shared storage to save the Web page to the shared storage

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The LVS Load Balancer configuration for NAT mode is complete!

Linux LVS load Balancing NAT mode