services:
- name: proxy
  addr: :8080
  handler:
    type: http
    chain: my-chain
  listener:
    type: tcp

# Live relay: forwards to the echo server.
- name: relay
  addr: 127.0.0.1:18081
  handler:
    type: http
  listener:
    type: tcp

chains:
- name: my-chain
  hops:
  - name: hop-1
    selector:
      strategy: round
      maxFails: 1
      failTimeout: 10s
    nodes:
    - name: node-live
      addr: 127.0.0.1:18081
      connector:
        type: http
      probe:
        type: cmd
        command: "true"
        interval: 5s
    # This node's probe always fails → pre-marked dead → FailFilter excludes it.
    - name: node-dead
      addr: 127.0.0.1:18082
      connector:
        type: http
      probe:
        type: cmd
        command: "false"
        interval: 5s