我正在尝试建立一个 ElasticSearch 的部署，现在它作为标准许可证的一部分是免费的。就我个人而言，我无法获得查看elasticsearch群集的服务，我也不知道为什么。
我有一个如下所示的配置文件：

elasticsearch.ssl.enabled: true
elasticsearch.ssl.verify: false

ent_search.auth.source: standard

secret_management.encryption_keys: [secret]

allow_es_settings_modification: true

elasticsearch.host: https://monitoring.internal
elasticsearch.username: elastic
elasticsearch.password: secret

当我尝试使用 curl 要从我尝试运行服务的服务器访问资源，它可以正常工作：

$ curl --user elastic:secret https://monitoring.internal -k
{
  "name" : "monitoring-es-client-0",
  "cluster_name" : "monitoring",
  "cluster_uuid" : "XXX",
  "version" : {
    "number" : "7.9.0",
    "build_flavor" : "default",
    "build_type" : "docker",
    "build_hash" : "a479a2a7fce0389512d6a9361301708b92dff667",
    "build_date" : "2020-08-11T21:36:48.204330Z",
    "build_snapshot" : false,
    "lucene_version" : "8.6.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

但是，当我尝试运行企业搜索服务时，它无法完全启动，并显示一条毫无帮助的错误消息：

[2020-09-16T20:25:21.546+00:00][42859][2002][app-server][INFO]: Failed to connect to Elasticsearch backend. Make sure it is running.

诊断报告功能也没有多大帮助：

$ sudo bin/enterprise-search --diagnostic-report
Found java executable in PATH
Java version detected: 11.0.8 (major version: 11)
Enterprise Search is starting...
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/usr/share/enterprise-search/lib/war/lib/jruby-core-9.2.9.0-complete.jar) to method sun.nio.ch.NativeThread.signal(long)
WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-09-16T20:29:50.258+00:00][43020][2002][script][INFO]: Enterprise Search version=7.9.1, JRuby version=9.2.9.0, Ruby version=2.5.7, Rails version=4.2.11.3
[2020-09-16T20:29:51.158+00:00][43020][2002][script][INFO]: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
[2020-09-16T20:29:51.160+00:00][43020][2002][script][ERROR]: 
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Error: Enterprise Search is unable to connect to Elasticsearch. Ensure a healthy Elasticsearch cluster is running at https://monitoring.internal for user elastic.

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我在配置文件中做错了什么？