使用logstash同步Mysql数据表到ES的一点感悟

针对单独一个数据表而言，大致可以分如下两种情况：
1.该数据表中有一个根据当前时间戳更新的字段，此时监控的是这个时间戳字段
具体可以看这个文章：https://www.cnblogs.com/sanduzxcvbnm/p/12858967.html
示例：
modification_time就是表中要监控的时间戳字段

input {

  jdbc {   
    jdbc_connection_string => "jdbc:mysql://192.168.0.145:3306/db_example?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"
    jdbc_user => "root"
    jdbc_password => "root"
    jdbc_driver_class => "com.mysql.cj.jdbc.Driver"
    jdbc_driver_library => ""
    jdbc_paging_enabled => true
    jdbc_page_size => "1000"
    tracking_column => "unix_ts_in_secs"
    use_column_value => true
    tracking_column_type => "numeric"
    schedule => "*/5 * * * * *"
    statement => "SELECT *, UNIX_TIMESTAMP(modification_time) AS unix_ts_in_secs FROM es_table WHERE (UNIX_TIMESTAMP(modification_time) > :sql_last_value AND modification_time < NOW()) ORDER BY modification_time ASC"
    type => "es_table"
  }
  
}

2.该数据表中没有根据当前时间戳更新的字段，此时监控的是这个表中的其他字段，比如id字段或者其他
参考一下这个文档：https://www.cnblogs.com/sanduzxcvbnm/p/12858474.html
db_example是数据库名，es_table是数据表名

jdbc {

  jdbc_connection_string => "jdbc:mysql://192.168.0.145:3306/db_example?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"
  jdbc_user => "root"
  jdbc_password => "xxxxx"
  jdbc_driver_library => "/opt/elasticsearch/lib/mysql-connector-java-8.0.20.jar"
  jdbc_driver_class => "com.mysql.cj.jdbc.Driver"
  jdbc_paging_enabled => "true"
  jdbc_page_size => "500"
  use_column_value => "true"
  record_last_run => "true"
  tracking_column => "id"
  last_run_metadata_path => "/opt/logstash/bin/logstash_xxy/cxx_info" # 存储监控的id字段值
  clean_run => "false"
  statement => "select * from es_table where id > :sql_last_value"
  schedule => "* * * * *"
  type => "es_table"

}

或者如下这种直接指定id的起始值

    jdbc {
       jdbc_connection_string => "jdbc:mysql://192.168.0.145:3306/db_example?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"
       jdbc_user => "root"
       jdbc_password => "root"
       jdbc_validate_connection => true
       jdbc_driver_library => ""
       jdbc_driver_class => "com.mysql.cj.jdbc.Driver"
       parameters => { "id" => "1" }
       statement => "SELECT * FROM es_table WHERE id > :id"
       type => "es_table"
    }

需要在jdbc{}中新增一个type字段，比如上面所示，但是在第二个示例中，指定存储id值的文件不能是同一个,也就是last_run_metadata_path的值

可以参考如下示例：

input {
  jdbc {   
    jdbc_connection_string => "jdbc:mysql://192.168.0.145:3306/db_example?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"
    jdbc_user => "root"
    jdbc_password => "root"
    jdbc_driver_class => "com.mysql.cj.jdbc.Driver"
    jdbc_driver_library => ""
    jdbc_paging_enabled => true
    jdbc_page_size => "1000"
    record_last_run => "true"   
    tracking_column => "unix_ts_in_secs"
    use_column_value => true
    tracking_column_type => "numeric"
    schedule => "*/5 * * * * *"
    statement => "SELECT *, UNIX_TIMESTAMP(modification_time) AS unix_ts_in_secs FROM es_table WHERE (UNIX_TIMESTAMP(modification_time) > :sql_last_value AND modification_time < NOW()) ORDER BY modification_time ASC"
    type => "es_table"
  }
  
  
  jdbc {   
    jdbc_connection_string => "jdbc:mysql://192.168.0.145:3306/db_example?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"
    jdbc_user => "root"
    jdbc_password => "root"
    jdbc_driver_class => "com.mysql.cj.jdbc.Driver"
    jdbc_driver_library => ""
    jdbc_paging_enabled => true
    jdbc_page_size => "1000"
    record_last_run => "true"   
    tracking_column => "unix_ts_in_secs"
    use_column_value => true
    tracking_column_type => "numeric"
    schedule => "*/5 * * * * *"
    statement => "SELECT *, UNIX_TIMESTAMP(modification_time) AS unix_ts_in_secs FROM es_table1 WHERE (UNIX_TIMESTAMP(modification_time) > :sql_last_value AND modification_time < NOW()) ORDER BY modification_time ASC"
    type => "es_table1"
  }
}

filter {
  ruby {
     code => "event.set('timestamp', event.get('@timestamp').time.localtime + 8*60*60)"
  }
  ruby {
     code => "event.set('@timestamp',event.get('timestamp'))"
  }
  mutate {
    copy => { "id" => "[@metadata][_id]"}
    remove_field => ["id", "@version", "unix_ts_in_secs","timestamp"]
  }
  
}
output {
 if [type]=="es_table" {
    elasticsearch {
        hosts => ["192.168.75.21:9200"]
     	index => "es_table_idx"
     	document_id => "%{[@metadata][_id]}"
        user => "elastic"
        password => "GmSjOkL8Pz8IwKJfWgLT"
    }
  }
 if [type]=="es_table1" {
    elasticsearch {
        hosts => ["192.168.75.21:9200"]
     	index => "es_table1_idx"
     	document_id => "%{[@metadata][_id]}"
        user => "elastic"
        password => "GmSjOkL8Pz8IwKJfWgLT"
    }
  }
}