# Zone-Aware Load Balancing
#
# Prefers same-zone endpoints to reduce cross-zone network costs and
# latency. When the local zone's healthy capacity drops below the
# configured threshold, traffic spills to all endpoints.
#
# In this example, the proxy is in zone "us-east-1a" and prefers
# endpoints in that zone. If fewer than 70% of local endpoints are
# healthy, traffic spills to all zones.
#
# Usage:
#   cargo run -p praxis-proxy -- -c examples/configs/traffic-management/zone-aware.yaml
#   curl http://localhost:8080/

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:
              zone_aware:
                local_zone: "us-east-1a"
                inner_strategy: round_robin
                min_local_healthy_pct: 70
            endpoints:
              - address: "127.0.0.1:3001"
                zone: "us-east-1a"
              - address: "127.0.0.1:3002"
                zone: "us-east-1a"
              - address: "127.0.0.1:3003"
                zone: "us-east-1b"
              - address: "127.0.0.1:3004"
                zone: "us-west-2a"

insecure_options:
  allow_private_endpoints: true # example proxies to local backends