Global Load Balancing : Configuring servers
 
Configuring servers
In the context of the global server load balance configuration, servers are the local SLB (FortiADC instances or third-party servers) that are to be load balanced. For FortiADC instances, the GLB checks status and synchronizes configuration from the local SLB so that it can learn the set of virtual servers that are possible to include in the GLB virtual server pool.
Figure 47 illustrates configuration discovery. Placement in this list does not include them in the pool. You also must name them explicitly in the virtual server pool configuration.
Figure 47: Virtual server discovery
Before you begin:
• You must have created the data center configuration objects that are associated with the local SLB.
• You must have created virtual server configurations on the local FortiADC SLB. In this procedure, the global SLB discovers them.
• You must have created gateway configuration objects on the local FortiADC SLB if you want to configure a gateway health check. In this procedure, the global SLB discovers them.
• You must have Read-Write permission for Global DNS Server settings.
After you have created a server configuration object, you can specify it the global load balancing virtual server pool configuration.
To configure servers:
1. Go to Global Load Balance > Global Object.
2. Click the Server tab.
3. Click Add to display the configuration editor.
4. Complete the configuration as described in Table 45.
5. Use the Discover utility to populate the Member list configuration with virtual server configuration details from the local FortiADC SLB.
6. Optional. Edit the populated list to select a discovered gateway configuration object if you want the GSLB to perform gateway health checks.
7. Save the configuration.
 
Table 34: Server configuration
Settings
Guidelines
Name
Configuration name. Valid characters are A-Z, a-z, 0-9, _, and -. No spaces. You reference this name in the virtual server pool configuration.
Note: After you initially save the configuration, you cannot edit the name.
Type
• FortiADC-SLB: A FortiADC instance.
• Generic-Host: A third party ADC or server.
Synchronization
Enable/disable synchronization of the virtual server status from the local FortiADC SLB. Disabled by default. If enabled, synchronization occurs whenever there is a change in virtual server status.
Address Type
IPv4 or IPv6.
IP Address
Specify the IP address for the FortiADC management interface. This IP address is used for synchronization and also status checks. If the management interface is unreachable, the virtual servers for that FortiADC are excluded from DNS answers.
Data Center
Select a data center configuration object. The data center configuration object properties are used to establish the proximity of the servers and the client requests.
Member
Add/Delete
Add or delete member virtual servers.
Discover
Populate the member list with virtual servers from the local FortiADC configuration. After the list had been populated, you can edit the configuration to add a gateway health check.
Override
Select this option if you want to update the discovered virtual server configuration with the latest configuration information whenever you use the Discover utility (for example, additions or changes to previously discovered configurations).
Unselect this option if you want to preserve the previously discovered configuration and not have it overwritten by the Discover operation.
Name
Must match the virtual server configuration name on the local FortiADC.
Address Type
IPv4 or IPv6.
IP Address
Virtual server IP address.
Port
Virtual server port.
Protocol
TCP or UDP. The default is TCP.
Gateway
Enable an additional health check: is the gateway beyond the FortiADC reachable?
The list of gateway configuration objects is populated by discovery, but you must select the appropriate one from the list.