echo2_server.json

{
  "listeners": [
  {
    "address": "tcp://{{ ip_loopback_address }}:0",
    "use_original_dst": true,
    "filters": [
      { "name": "ratelimit",
        "config": {
          "domain": "foo",
          "descriptors": [[{"key": "foo", "value": "bar"}]],
          "stat_prefix": "name"
        }
      },
      { "name": "echo2", "config": {} }
    ]
  }],

  "admin": { "access_log_path": "/dev/null",
	     "profile_path": "{{ test_tmpdir }}/envoy.prof",
	     "address": {
	       "socket_address": {"address": "127.0.0.1", "port_value": 0}
	     }
  },

  "cluster_manager": {
      "clusters": []
  }
}