Load Balancing

FastGateway supports multiple load balancing algorithms through Default Traffic Policy.

Algorithms

Algorithm	Description
Round Robin	Distributes requests sequentially (default)
Least Request	Routes to backend with fewest active requests
Random	Randomly selects a backend
Consistent Hash	Routes same clients to same backends

Configuration Example

defaultTrafficPolicy:
  loadBalancer:
    type: "ConsistentHash"
    consistentHash:
      type: "Header"
      header:
        name: "X-User-ID"

Consistent Hash Options

Maintain session affinity using:

Type	Description
Header	Hash based on request header value
Cookie	Hash based on cookie value
SourceIP	Hash based on client IP address

consistentHash:
  type: "Cookie"
  cookie:
    name: "session_id"
    ttl: "3600s"

Consistent hashing ensures the same client reaches the same backend, useful for stateful applications and caching efficiency.