consul for http service + check

client.json

{
  "datacenter": "dc1",
  "data_dir": "/var/lib/consul",
  "bind_addr": "5.6.7.8",
  "log_level": "INFO",
  "node_name": "node2",
  "server": false,
  "bootstrap" : false,
  "retry_join": [ "1.2.3.4" ],
  "rejoin_after_leave": true,
  "ports": {
    "dns": -1,
    "http": -1
  }
}

server.json

{
  "datacenter": "dc1",
  "data_dir": "/var/lib/consul",
  "bind_addr": "1.2.3.4",
  "domain": "cdn.example.com",
  "log_level": "INFO",
  "node_name": "node1",
  "server": true,
  "bootstrap_expect": 1,
  "dns_config": {
    "service_ttl": {
       "*": "60s"
    },
    "node_ttl":    "60s",
    "max_stale":   "5s",
    "enable_truncate": true,
    "only_passing": true
  },
  "addresses": {
    "dns": "0.0.0.0"
  },
  "ports": {
    "dns": 53
  },
  "rejoin_after_leave": true
}

webserver.json

{
    "service": {
        "name": "webserver",
        "tags": ["snowball"],
        "port": 80
    },
    "check": {
        "id": "http-check",
        "service-id": "webserver",
        "name": "HTTP on port 80",
        "http": "http://localhost:80/",
        "interval": "10s",
        "timeout": "5s"
    }
}