Introduction to LB:get_current_routing()
The LB:get_current_routing() function plays a crucial role in FortiADC, particularly for those looking to optimize traffic management through precise backend allocations. In this blog post, we’ll delve into the purpose of the LB:get_current_routing() function, explaining its application and how you can efficiently utilize it to achieve optimal performance in your network environment.
Purpose of LB:get_current_routing()
The primary purpose of the LB:get_current_routing() function is to determine which backend is currently allocated for a given request in FortiADC. This function is essential when managing multiple backend servers and ensuring requests are routed correctly to maintain seamless traffic handling.
- Single Backend Configuration: If there is only one backend configured, the function directly returns the backend name as a string.
- Multiple Backend Configuration: In situations where multiple backends are set using LB:routing(), the function returns the backend name. If multiple backends exist but are not set, it returns an empty string.
- Zero or One Content Routing: In this scenario, the pool name will be provided, thus simplifying identification of current routing.
Syntax and Arguments
The syntax for using LB:get_current_routing() is straightforward:
LB:get_current_routing();
Arguments: The function requires no additional arguments to execute.
Applicable Events
You’ll find this function highly useful in the following events:
- HTTP_REQUEST
- HTTP_DATA_REQUEST
- AUTH_RESULT
Practical Example Using LB:get_current_routing()
Here’s a quick example demonstrating how you can use the LB:get_current_routing() function in a real-world scenario:
when HTTP_REQUEST {
t=LB:get_current_routing()
if (s == nil or s == ”) then
s = “No backend returned.”
end
debug(“current routing: %sn”, s).
}
Supported Versions
The function is supported on FortiADC version 7.4.2 and later, ensuring you can leverage it in recent setups for improved backend management.
Conclusion
Proper management of backend servers is critical in maintaining an efficient network infrastructure. By using the LB:get_current_routing() function, FortiADC users can enhance their control over traffic routing, ensuring that requests are handled by the appropriate backend servers. Understanding how to implement and utilize this function effectively will significantly contribute to a smoother, more reliable network operation.