Logstash：无法连接到外部Amazon RDS数据库 [英] Logstash: Unable to connect to external Amazon RDS Database

问题描述

我对logstash&；Elasticsearch相对较新.

已在MacOS Mojave上安装使用的logstash&；Elasticsearch(10.14.2)：

brew install logstash
brew install elasticsearch

当我检查这些版本时：

brew list --versions

接收以下输出：

elasticsearch 6.5.4
logstash 6.5.4

当我打开Google Chrome并在URL地址字段中键入以下内容时：

localhost:9200

这是我收到的JSON响应：

{
    "name" : "9oJAP16",
    "cluster_name" : "elasticsearch_local",
    "cluster_uuid" : "PgaDRw8rSJi-NDo80v_6gQ",
    "version" : {
        "number" : "6.5.4",
        "build_flavor" : "oss",
        "build_type" : "tar",
        "build_hash" : "d2ef93d",
        "build_date" : "2018-12-17T21:17:40.758843Z",
        "build_snapshot" : false,
        "lucene_version" : "7.5.0",
        "minimum_wire_compatibility_version" : "5.6.0",
        "minimum_index_compatibility_version" : "5.0.0"
    },
    "tagline" : "You Know, for Search"
}

内部：

/usr/local/etc/logstash/logstash.yml

驻留以下变量：

path.data: /usr/local/Cellar/logstash/6.5.4/libexec/data
pipeline.workers: 2
path.config: /usr/local/etc/logstash/conf.d
log.level: info
path.logs: /usr/local/var/log

内部：

/usr/local/etc/logstash/pipelines.yml

驻留以下变量：

- pipeline.id: main
path.config: "/usr/local/etc/logstash/conf.d/*.conf"

---

在下面设置了以下logstash_etl.conf文件：

/usr/local/etc/logstash/conf.d

内容：

input {
    jdbc {
       jdbc_connection_string => "jdbc:mysql://myapp-production.crankbftdpmc.us-west-2.rds.amazonaws.com:3306/products"
       jdbc_user => "products_admin"
       jdbc_password => "products123"
       jdbc_driver_library => "/etc/logstash/mysql-connector/mysql-connector-java-5.1.21.jar"
       jdbc_driver_class => "com.mysql.jdbc.driver"
       schedule => "*/5 * * * *"
       statement => "select * from products"
       use_column_value => false
       clean_run => true
    }
}

# sudo /usr/share/logstash/bin/logstash-plugin install logstash-output-exec
output {
   if ([purge_task] == "yes") {
         exec {
             command => "curl -XPOST 'localhost:9200/_all/products/_delete_by_query?conflicts=proceed' -H 'Content-Type: application/json' -d'
                 {
                   "query": {
                     "range" : {
                       "@timestamp" : {
                         "lte" : "now-3h"
                       }
                     }
                   }
                 }
             '"
        }
    } 
    else {
        stdout { codec => json_lines}
        elasticsearch {
            "hosts" => "localhost:9200"
            "index" => "product_%{product_api_key}"
            "document_type" => "%{[@metadata][index_type]}"
            "document_id" => "%{[@metadata][index_id]}"
            "doc_as_upsert" => true
            "action" => "update"
            "retry_on_conflict" => 7
        }
    }
}

执行此操作时：

brew services start logstash

在我的/usr/local/var/log/logstash-Pla.log文件中收到以下内容：

[2019-01-15T14:51:15,319][INFO ][logstash.pipeline        ] Pipeline started successfully {:pipeline_id=>"main", :thread=>"#<Thread:0x399927c7 run>"}
[2019-01-15T14:51:15,663][INFO ][logstash.agent           ] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
[2019-01-15T14:51:16,514][INFO ][logstash.agent           ] Successfully started Logstash API endpoint {:port=>9600}
[2019-01-15T14:57:31,432][ERROR][logstash.inputs.jdbc     ] Unable to connect to database. Tried 1 times {:error_message=>"Java::ComMysqlCjJdbcExceptions::CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server."}
[2019-01-15T14:57:31,435][ERROR][logstash.inputs.jdbc     ] Unable to connect to database. Tried 1 times {:error_message=>"Java::ComMysqlCjJdbcExceptions::CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server."}[2019-01-15T14:51:15,319][INFO ][logstash.pipeline        ] Pipeline started successfully {:pipeline_id=>"main", :thread=>"#<Thread:0x399927c7 run>"}
[2019-01-15T14:51:15,663][INFO ][logstash.agent           ] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
[2019-01-15T14:51:16,514][INFO ][logstash.agent           ] Successfully started Logstash API endpoint {:port=>9600}
[2019-01-15T14:57:31,432][ERROR][logstash.inputs.jdbc     ] Unable to connect to database. Tried 1 times

---

我可能做错了什么？

有没有办法从Elasticsearch服务器(暂存或生产)获取转储(例如mysqldump)，然后重新导入到运行Elasticsearch的本地实例，而不使用logstash？

这与在Amazon EC-2生产实例中工作的配置文件相同，但不知道为什么它不能在我的本地MacOS Mojave实例中工作？

rds

您可能会遇到推荐答案的ssl问题，因为

如果您使用MySQL Java Connector v5.1.38或更高版本，或者MySQL Java Connector v8.0.9或更高版本连接到数据库，即使您没有将应用程序显式配置为在连接到数据库时使用SSL/TLS，这些客户端驱动程序也会默认使用SSL/TLS。此外，在使用SSL/TLS时，它们执行部分证书验证，如果数据库服务器证书过期，则连接失败。

如AWS RDS Doc

中所述

若要克服此问题，请为LogStash设置信任存储区，上面的链接也介绍了这一点。

或冒险禁用连接字符串中的SSL，如

jdbc_connection_string => "jdbc:mysql://myapp-production.crankbftdpmc.us-west-2.rds.amazonaws.com:3306/products?sslMode=DISABLED"

这篇关于Logstash：无法连接到外部Amazon RDS数据库的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！