graylog-custom-mapping.json

{
  "template": "graylog_*",
  "mappings" : {
    "message" : {
      "properties" : {
       "haproxy_Tc" : {
            "type" : "long"
          },
          "haproxy_Tt" : {
            "type" : "long"
          },
          "haproxy_Tw" : {
            "type" : "long"
          },
        "haproxy_bytesRead" : {
          "type" : "long"
        }
      }
    }
  }
}