# Ring Hash Load Balancing
#
# Routes requests to a stable backend by hashing a configurable request
# header through a sorted virtual-node ring. Compared to basic consistent
# hash, ring hash offers pluggable hash functions (fnv1a, xxhash, murmur3)
# and tunable virtual node density for better distribution uniformity.
#
# Usage:
#   cargo run -p praxis-proxy -- -c examples/configs/traffic-management/ring-hash.yaml
#   for i in $(seq 1 6); do
#     curl -H "X-Session-Id: sess-42" http://localhost:8080/
#   done

listeners:
  - name: default
    address: "127.0.0.1:8080"
    filter_chains:
      - main

filter_chains:
  - name: main
    filters:
      - filter: router
        routes:
          - path_prefix: "/"
            cluster: backend

      - filter: load_balancer
        clusters:
          - name: backend
            load_balancer_strategy:
              ring_hash:
                header: "X-Session-Id"
                hash_function: xxhash
                virtual_nodes: 150
            endpoints:
              - "127.0.0.1:3001"
              - "127.0.0.1:3002"
              - "127.0.0.1:3003"

insecure_options:
  allow_private_endpoints: true # example proxies to local backends