Kibana 不显示从 Node.js Winston Logger 发送到 Elasticsearch 的日志

我使用winston和winston-elasticsearch包将日志从 Node.js 应用程序直接发送到 Elasticsearch 。Elasticsearch 7.5.1、Logstash 和 Kibana 7.5.1 使用 Docker Compose 部署在远程服务器上。

问题一：运行发送2条日志消息到Elasticsearch的node.js文件后，程序没有自动退出返回终端。在 Mac OS X Mojave 10.14.6 上使用 Node.js v12.6.0。

问题 2：将这 2 条日志消息发送到 Elasticsearch 后，可以使用 Web 浏览器在http://<example.com>:9200/logs-2020.02.01/_search.

{"took":5,"timed_out":false,"_shards":{"total":1,"successful":1,"skipped":0,"failed":0},"hits":{"total":{"value":2,"relation":"eq"},"max_score":1.0,"hits":[{"_index":"logs-2020.02.01","_type":"_doc","_id":"85GgA3ABiaPPk4as1pEc","_score":1.0,"_source":{"@timestamp":"2020-02-02T02:00:35.789Z","message":"a debug message","severity":"debug","fields":{}}},{"_index":"logs-2020.02.01","_type":"_doc","_id":"9JGgA3ABiaPPk4as1pEc","_score":1.0,"_source":{"@timestamp":"2020-02-02T02:00:35.791Z","message":"an info log","severity":"info","fields":{}}}]}}

但是，这些日志不会显示在 Kibana 上，例如https://<example.com>/app/infra#/logs/stream?_g=().

知道如何让日志也显示在 Kibana 上吗？另外，为什么 Node.js 应用程序在发送日志消息后没有退出？

谢谢！

Node.js 应用程序

const winston = require('winston');
const ElasticsearchWinston = require('winston-elasticsearch');
const options = {
    console: {
        level: 'debug',
        handleExceptions: true,
        json: false,
        colorize: true
    },
    elasticsearch: {
        level: 'debug',
        clientOpts: {
            node: 'http://user:[email protected]:9200',
            log: 'debug',
            maxRetries: 2,
            requestTimeout: 10000,
            sniffOnStart: false,
        }
    }
}

var logger = winston.createLogger({
    exitOnError: false,
    transports: [
        new winston.transports.Console(options.console),
        new ElasticsearchWinston(options.elasticsearch)
    ]
});

logger.debug('a debug message');
logger.info('an info log');