Server load balance
Server Load Balance overview
FortiADC provides two options for configuring virtual servers—Basic Mode and Advanced Mode. In this document we will provide a step by step example for you to deploy load balance based on Advanced mode.
Example
1. Configure a load-balance real server.
Go to Server Load Balance > Real Server Pool, and click the Real Server tab.
2. Configure a load-balance pool
Go to Server Load Balance > Real Server Pool, click the Real Server Pool tab.
- Set name, address type and Health Check as desired.
- If your real web server is using an http server, leave Real Server SSL Profile as NONE. If your real web server uses an https server, set Real Server SSL Profile as desired.
Then add pool members.
For all detailed setting please check CLI reference config load-balance pool.
For Pool member weight, please see below:
|
Pool member weight |
Assigns relative preference among members—higher values are preferred and are assigned connections more frequently. The default is 1. The valid range is 1 to 256. All load balancing methods consider weight. Servers are dispatched requests proportional to their weight, relative to the sum of all weights.
For other methods, weight functions as a tie-breaker. For example, with the Least Connection algorithm, requests are sent to the server with the least connections. If the number of connections is equal, the request is sent to the server with the greater weight.
Example RealServer A, Weight 1, 1 connection ReaServer B, Weight 2, 1 connection The next request is sent to RealServer B. |
3. Config load-balance Method. The system includes predefined configuration objects for all supported load balancing methods, and there is no need to create additional configuration objects. You may choose to do so, however, for various reasons.
Go to Server Load Balance > application resources, click the LB Method tab.
For detailed settings please check the CLI reference config load-balance method.
4. Configure a load-balance Profile.
A profile is a configuration object that defines how you want the FortiADC virtual server to handle traffic for specific protocols.
The system includes predefined configuration objects for all supported load balancing profile, and there is no need to create additional configuration objects. You may choose to do so, however, for various reasons.
Go to Server Load Balance > application resources, click the Application Profile tab.
For all detail setting please check CLI reference config load-balance profile.
5. Configure a load-balance virtual server
Go to Server Load Balance > Virtual Server > Virtual Server tab, click Create New button, select Advanced Mode.
For detailed settings please check CLI reference config load-balance virtual-server. The document only provides the items that must be configured.
More information
For more information, see the following pages:
- Example for Layer 7 HTTPS virtual server
Please see “FortiADC Server Load Balance SSL Deployment Guide”:
https://docs.fortinet.com/document/fortiadc/5.3.0/server-load-balance-ssl-deployment-guide
- Example for Layer 4 virtual server
Please see “FortiADC SLB Layer 4 Deployment Guide”:
“https://docs.fortinet.com/document/fortiadc/5.3.0/server-load-balance-layer-4-deployment-guide/153989/introduction
- Example: NAT46 (Layer 7 virtual servers)
https://docs.fortinet.com/document/fortiadc/5.3.0/handbook/630669/using-source-pools
- Example: NAT64 (Layer 7 virtual servers)
https://docs.fortinet.com/document/fortiadc/5.3.0/handbook/630669/using-source-pools
Other deployment guide for advanced features
- L7VS Content Rewriting Deployment Guide: https://docs.fortinet.com/document/fortiadc/5.2.0/fortiadcdseriesfortiadcl7vscontentrewritingdeploymentguide
- L7VS Content Routing Deployment Guide:
https://docs.fortinet.com/document/fortiadc/5.2.0/l7vs-content-routing-deployment-guide
- L7VS with SSO Authentication Relay Deployment Guide:
https://docs.fortinet.com/document/fortiadc/5.2.0/fortiadcdseriesfortiadcl7vswithssoauthenticationrelaydeploymentguide
- L7VS Kerberos Deployment Guide:
https://docs.fortinet.com/document/fortiadc/5.2.0/fortiadcdseriesfortiadcl7vskerberosdeploymentguide
- L7SLB Virtual Server with AntiVirus Deployment Guide
https://docs.fortinet.com/document/fortiadc/5.2.0/fortiadcdseriesfortiadcl7slbvirtualserverwithantivirusdeploymentguide