You can add a server pool to manage and share backend servers flexibly and efficiently. A pool manages load balancer distribution methods and has a service monitor attached to it for health check parameters.

1

Log in to vCloud Air and navigate to the vCloud Edge Gateway Services UI.

See Log In and Navigate to Advanced Networking Services for information.

2

Click the Load Balancer tab and Pools.

3

Type a name and description for the load balancer pool.

4

Select a balancing method for the service from the Algorithm drop-down menu:

Option

Description

ROUND-ROBIN

Each server is used in turn according to the weight assigned to it. This is the smoothest and fairest algorithm when the server processing time remains equally distributed.

IP-HASH

Selects a server based on a hash of the source and destination IP address of each packet.

LEASTCONN

Distributes client requests to multiple servers based on the number of connections already on the server. New connections are sent to the server with the fewest connections.

URI

The left part of the URI (before the question mark) is hashed and divided by the total weight of the running servers. The result designates which server will receive the request. This option ensures that a URI is always directed to the same server as long as no server goes up or down

HTTPHEADER

 

URL

 
5

Add members to the pool.

a

Click the Add (Add icon) icon.

b

Type the name and IP address of the server member.

c

Type the port where the member is to receive traffic on and the monitor port where the member is to receive health monitor pings.

d

In Weight, type the proportion of traffic this member is to handle.

e

Type the maximum number of concurrent connections the member can handle.

When the incoming requests are higher than the maximum, they will be queued and the load balancer will wait for a connection to be released.

f

Type the minimum number of concurrent connections a member must always accept.

g

Click OK.

6

(Optional) To make client IP addresses visible to the backend servers, select Transparent.

When Transparent is not selected (the default value), backend servers see the IP address of the traffic source as the internal IP address of the load balancer.

When Transparent is selected, the source IP address is the actual IP address of the client and the edge gateway must be set as the default gateway to ensure that return packets go through the edge gateway.

7

Click OK.

Add virtual servers for your load balancer. A virtual server has a public IP address and services all incoming client requests. See Add a Virtual Server.