# Canary Routing
#
# Sends ~10% of traffic to a canary backend while the stable
# backend handles the remaining ~90%. Weighted round-robin
# controls the split.
#
#   ┌────────┐
#   │ client │
#   └───┬────┘
#       │
#   ┌───▼────┐
#   │ proxy  │  :8080
#   └───┬────┘
#       │ round_robin (weights 9:1)
#       ├──────────────────────┐
#   ┌───▼────┐            ┌───▼────┐
#   │ stable │  :3001     │ canary │  :3002
#   └────────┘ ~90%       └────────┘ ~10%
#
# Usage:
#   cargo run -p praxis-proxy -- \
#     -c examples/configs/traffic-management/canary-routing.yaml
#   for i in $(seq 1 10); do
#     curl -s http://localhost:8080/
#     echo
#   done
#   # ~9 responses from :3001, ~1 from :3002

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: round_robin
            endpoints:
              - address: "127.0.0.1:3001"
                weight: 9          # stable — ~90% of requests
              - address: "127.0.0.1:3002"
                weight: 1          # canary — ~10% of requests

insecure_options:
  allow_private_endpoints: true # example proxies to local backends