# Iterative Request Router: Provider Failover
#
# Demonstrates provider failover using the
# iterative_request_router filter. When the primary
# backend returns 5xx, the request automatically
# retries against a fallback provider.
#
# ⚠️  EXPERIMENTAL: This example uses the `iterative-request-router` experimental feature.
# Not recommended for production use. Build with --features iterative-request-router.
#
# Usage:
#   cargo run -p praxis-proxy --features iterative-request-router -- -c examples/configs/traffic-management/iterative-request-router-failover.yaml
#   curl http://localhost:8080/

listeners:
  - name: gateway
    address: "127.0.0.1:8080"
    filter_chains:
      - failover

filter_chains:
  - name: failover
    filters:
      - filter: iterative_request_router
        initial_step: primary
        steps:
          - name: primary
            filters:
              - filter: router
                routes:
                  - path_prefix: "/"
                    cluster: primary-backend
              - filter: load_balancer
                clusters:
                  - name: primary-backend
                    endpoints:
                      - "127.0.0.1:3000"
            on_result:
              - status: [502, 503, 504]
                next: fallback
              - default: true
                done: true
          - name: fallback
            filters:
              - filter: router
                routes:
                  - path_prefix: "/"
                    cluster: fallback-backend
              - filter: load_balancer
                clusters:
                  - name: fallback-backend
                    endpoints:
                      - "127.0.0.1:3001"
            on_result:
              - default: true
                done: true

insecure_options:
  allow_private_endpoints: true # example proxies to local backends