echo2_server.yaml

admin:
  access_log_path: /dev/null
  address:
    socket_address:
      address: 127.0.0.1
      port_value: 0
static_resources:
  clusters:
    name: cluster_0
    hosts:
      socket_address:
        address: 127.0.0.1
        port_value: 0
  listeners:
    name: listener_0
    address:
      socket_address:
        address: 127.0.0.1
        port_value: 0
    filter_chains:
      filters:
        name: envoy.ratelimit
        config:
          domain: foo
          stats_prefix: name
          descriptors: [{"key": "foo", "value": "bar"}]
      filters:
        name: envoy.echo
        config: