docker运行datax实现数据同步方案 -- datax/Oracle-Oracle/MySQL篇

Bertha 。 2022-03-31 11:44 1058阅读 0赞

之前已经构建好了datax镜像，只差最后一步，datax运行

datax的使用很简单：

python datax.py 配置文件.json

以上命令就可以直接使用datax了，本次就来分解以上命令

首先python打头执行命令，datax.py是datax自带的，该可执行文件再datax的bin目录下，最后加上执行的配置文件

配置文件大体结构是：

配置文件是要用json来写的，官方有自带模板，进入到bin目录后可以通过命令查看：

python datax.py -r oraclereader -w oraclewriter

--------------------

2019.1.9更新

今早开始测试datax同步，经过几天的学习，对datax的使用又加深了不少理解。

datax官方自带模板，可以通过命令获得所支持的json模板

python datax.py -r mysqlreader -w mysqlwriter > mysql2mysql1.json
    
    -r ：读的数据库模板，可以是oracle、mysql等等，但是要加上reader
    -w ：写的数据库模板，同上
    
    > 把模板格式写到一个文件上，后面是自己取的文件名

本次我测试MySQL-MySQL

#在datax脚本路径查看有哪些json
    [root@8ec3fabb3594 bin]# ls
    datax.py  dxprof.py  perftrace.py
    
    #获取模板，写入json文件
    [root@8ec3fabb3594 bin]# python datax.py -r mysqlreader -w mysqlwriter > mysql2mysql1.json
    
    #查看文件是否出现和文件模板内容
    [root@8ec3fabb3594 bin]# ls
    datax.py  dxprof.py  mysql2mysql1.json  perftrace.py
    [root@8ec3fabb3594 bin]# cat mysql2mysql1.json 
    
    DataX (DATAX-OPENSOURCE-3.0), From Alibaba !
    Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved.
    
    
    Please refer to the mysqlreader document:
         https://github.com/alibaba/DataX/blob/master/mysqlreader/doc/mysqlreader.md 
    
    Please refer to the mysqlwriter document:
         https://github.com/alibaba/DataX/blob/master/mysqlwriter/doc/mysqlwriter.md 
     
    Please save the following configuration as a json file and  use
         python {DATAX_HOME}/bin/datax.py {JSON_FILE_NAME}.json 
    to run the job.
    
    {
        "job": {
            "content": [
                {
                    "reader": {
                        "name": "mysqlreader", 
                        "parameter": {
                            "column": [], 
                            "connection": [
                                {
                                    "jdbcUrl": [], 
                                    "table": []
                                }
                            ], 
                            "password": "", 
                            "username": "", 
                            "where": ""
                        }
                    }, 
                    "writer": {
                        "name": "mysqlwriter", 
                        "parameter": {
                            "column": [], 
                            "connection": [
                                {
                                    "jdbcUrl": "", 
                                    "table": []
                                }
                            ], 
                            "password": "", 
                            "preSql": [], 
                            "session": [], 
                            "username": "", 
                            "writeMode": ""
                        }
                    }
                }
            ], 
            "setting": {
                "speed": {
                    "channel": ""
                }
            }
        }
    }
    [root@8ec3fabb3594 bin]# ls
    datax.py  dxprof.py  mysql2mysql1.json  perftrace.py
    [root@8ec3fabb3594 bin]# vi mysql2mysql1.json

之后按照模板填信息，列：

{
        "job": {
            "content": [
                {
                    "reader": {
                        "name": "mysqlreader", 
                        "parameter": {
                            #最好指定同步的字段，否则会出警告，且耦合度较高，我这里测试就偷个懒
                            "column": ["*"], 
                            "connection": [
                                {
                                       #jdb格式就是jdbc标准格式+ip+要同步的数据库
                                    "jdbcUrl": ["jdbc:mysql://45.59.13.2:3306/datax"], 
                                    "table": ["test"]
                                }
                            ], 
                            "password": "My@test", 
                            "username": "root", 
                            "where": ""
                            #不是所有参数必须给值，必填参数可在git上参考官方文档
                        }
                    }, 
                    "writer": {
                        "name": "mysqlwriter", 
                        "parameter": {
                            "column": ["*"], 
                            "connection": [
                                {
                                    "jdbcUrl": "jdbc:mysql://45.59.13.2:3307/datax", 
                                    "table": ["test"]
                                }
                            ], 
                            "password": "My@test", 
                            "preSql": [], 
                            "session": [], 
                            "username": "root", 
                            #模式最好指定
                            "writeMode": "insert"
                        }
                    }
                }
            ], 
            "setting": {
                "speed": {
                    "channel": "1"
                }
            }
        }
    }

之后直解运行datax即可：

#同步命令
    [root@8ec3fabb3594 bin]# python datax.py mysql2mysql1.json
    
    #运行日志
    DataX (DATAX-OPENSOURCE-3.0), From Alibaba !
    Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved.
    
    
    2019-01-09 02:06:26.025 [main] INFO  VMInfo - VMInfo# operatingSystem class => sun.management.OperatingSystemImpl
    2019-01-09 02:06:26.035 [main] INFO  Engine - the machine info  => 
    
            osInfo: Oracle Corporation 1.8 25.191-b12
            jvmInfo:        Linux amd64 3.10.0-862.2.3.el7.x86_64
            cpu num:        4
    
            totalPhysicalMemory:    -0.00G
            freePhysicalMemory:     -0.00G
            maxFileDescriptorCount: -1
            currentOpenFileDescriptorCount: -1
    
            GC Names        [PS MarkSweep, PS Scavenge]
    
            MEMORY_NAME                    | allocation_size                | init_size                      
            PS Eden Space                  | 256.00MB                       | 256.00MB                       
            Code Cache                     | 240.00MB                       | 2.44MB                         
            Compressed Class Space         | 1,024.00MB                     | 0.00MB                         
            PS Survivor Space              | 42.50MB                        | 42.50MB                        
            PS Old Gen                     | 683.00MB                       | 683.00MB                       
            Metaspace                      | -0.00MB                        | 0.00MB                         
    
    
    2019-01-09 02:06:26.061 [main] INFO  Engine - 
    {
            "content":[
                    {
                            "reader":{
                                    "name":"mysqlreader",
                                    "parameter":{
                                            "column":[
                                                    "*"
                                            ],
                                            "connection":[
                                                    {
                                                            "jdbcUrl":[
                                                                    "jdbc:mysql://45.59.13.1:3306/datax"
                                                            ],
                                                            "table":[
                                                                    "test"
                                                            ]
                                                    }
                                            ],
                                            "password":"*******",
                                            "username":"root",
                                            "where":""
                                    }
                            },
                            "writer":{
                                    "name":"mysqlwriter",
                                    "parameter":{
                                            "column":[
                                                    "*"
                                            ],
                                            "connection":[
                                                    {
                                                            "jdbcUrl":"jdbc:mysql://45.59.13.1:3307/datax",
                                                            "table":[
                                                                    "test"
                                                            ]
                                                    }
                                            ],
                                            "password":"*******",
                                            "preSql":[],
                                            "session":[],
                                            "username":"root",
                                            "writeMode":"insert"
                                    }
                            }
                    }
            ],
            "setting":{
                    "speed":{
                            "channel":"1"
                    }
            }
    }
    
    2019-01-09 02:06:26.085 [main] WARN  Engine - prioriy set to 0, because NumberFormatException, the value is: null
    2019-01-09 02:06:26.087 [main] INFO  PerfTrace - PerfTrace traceId=job_-1, isEnable=false, priority=0
    2019-01-09 02:06:26.088 [main] INFO  JobContainer - DataX jobContainer starts job.
    2019-01-09 02:06:26.090 [main] INFO  JobContainer - Set jobId = 0
    2019-01-09 02:06:26.595 [job-0] INFO  OriginalConfPretreatmentUtil - Available jdbcUrl:jdbc:mysql://45.59.113.211:3306/datax?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true.
    2019-01-09 02:06:26.597 [job-0] WARN  OriginalConfPretreatmentUtil - 您的配置文件中的列配置存在一定的风险. 因为您未配置读取数据库表的列，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改.
    2019-01-09 02:06:26.911 [job-0] INFO  OriginalConfPretreatmentUtil - table:[test] all columns:[
    id,test
    ].
    2019-01-09 02:06:26.911 [job-0] WARN  OriginalConfPretreatmentUtil - 您的配置文件中的列配置信息存在风险. 因为您配置的写入数据库表的列为*，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改.
    2019-01-09 02:06:26.913 [job-0] INFO  OriginalConfPretreatmentUtil - Write data [
    insert INTO %s (id,test) VALUES(?,?)
    ], which jdbcUrl like:[jdbc:mysql://45.59.113.211:3307/datax?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true]
    2019-01-09 02:06:26.914 [job-0] INFO  JobContainer - jobContainer starts to do prepare ...
    2019-01-09 02:06:26.914 [job-0] INFO  JobContainer - DataX Reader.Job [mysqlreader] do prepare work .
    2019-01-09 02:06:26.915 [job-0] INFO  JobContainer - DataX Writer.Job [mysqlwriter] do prepare work .
    2019-01-09 02:06:26.915 [job-0] INFO  JobContainer - jobContainer starts to do split ...
    2019-01-09 02:06:26.916 [job-0] INFO  JobContainer - Job set Channel-Number to 1 channels.
    2019-01-09 02:06:26.922 [job-0] INFO  JobContainer - DataX Reader.Job [mysqlreader] splits to [1] tasks.
    2019-01-09 02:06:26.923 [job-0] INFO  JobContainer - DataX Writer.Job [mysqlwriter] splits to [1] tasks.
    2019-01-09 02:06:26.945 [job-0] INFO  JobContainer - jobContainer starts to do schedule ...
    2019-01-09 02:06:26.950 [job-0] INFO  JobContainer - Scheduler starts [1] taskGroups.
    2019-01-09 02:06:26.955 [job-0] INFO  JobContainer - Running by standalone Mode.
    2019-01-09 02:06:26.965 [taskGroup-0] INFO  TaskGroupContainer - taskGroupId=[0] start [1] channels for [1] tasks.
    2019-01-09 02:06:26.973 [taskGroup-0] INFO  Channel - Channel set byte_speed_limit to -1, No bps activated.
    2019-01-09 02:06:26.974 [taskGroup-0] INFO  Channel - Channel set record_speed_limit to -1, No tps activated.
    2019-01-09 02:06:26.992 [taskGroup-0] INFO  TaskGroupContainer - taskGroup[0] taskId[0] attemptCount[1] is started
    2019-01-09 02:06:26.997 [0-0-0-reader] INFO  CommonRdbmsReader$Task - Begin to read record by Sql: [select * from test 
    ] jdbcUrl:[jdbc:mysql://45.59.113.211:3306/datax?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true].
    2019-01-09 02:06:27.034 [0-0-0-reader] INFO  CommonRdbmsReader$Task - Finished read record by Sql: [select * from test 
    ] jdbcUrl:[jdbc:mysql://45.59.113.211:3306/datax?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true].
    2019-01-09 02:06:27.294 [taskGroup-0] INFO  TaskGroupContainer - taskGroup[0] taskId[0] is successed, used[308]ms
    2019-01-09 02:06:27.296 [taskGroup-0] INFO  TaskGroupContainer - taskGroup[0] completed it's tasks.
    2019-01-09 02:06:36.983 [job-0] INFO  StandAloneJobContainerCommunicator - Total 2 records, 6 bytes | Speed 0B/s, 0 records/s | Error 0 records, 0 bytes |  All Task WaitWriterTime 0.000s |  All Task WaitReaderTime 0.000s | Percentage 100.00%
    2019-01-09 02:06:36.983 [job-0] INFO  AbstractScheduler - Scheduler accomplished all tasks.
    2019-01-09 02:06:36.985 [job-0] INFO  JobContainer - DataX Writer.Job [mysqlwriter] do post work.
    2019-01-09 02:06:36.985 [job-0] INFO  JobContainer - DataX Reader.Job [mysqlreader] do post work.
    2019-01-09 02:06:36.986 [job-0] INFO  JobContainer - DataX jobId [0] completed successfully.
    2019-01-09 02:06:36.987 [job-0] INFO  HookInvoker - No hook invoked, because base dir not exists or is a file: /data/datax/hook
    2019-01-09 02:06:36.989 [job-0] INFO  JobContainer - 
             [total cpu info] => 
                    averageCpu                     | maxDeltaCpu                    | minDeltaCpu                    
                    -1.00%                         | -1.00%                         | -1.00%
                            
    
             [total gc info] => 
                     NAME                 | totalGCCount       | maxDeltaGCCount    | minDeltaGCCount    | totalGCTime        | maxDeltaGCTime     | minDeltaGCTime     
                     PS MarkSweep         | 0                  | 0                  | 0                  | 0.000s             | 0.000s             | 0.000s             
                     PS Scavenge          | 0                  | 0                  | 0                  | 0.000s             | 0.000s             | 0.000s             
    
    2019-01-09 02:06:36.990 [job-0] INFO  JobContainer - PerfTrace not enable!
    2019-01-09 02:06:36.991 [job-0] INFO  StandAloneJobContainerCommunicator - Total 2 records, 6 bytes | Speed 0B/s, 0 records/s | Error 0 records, 0 bytes |  All Task WaitWriterTime 0.000s |  All Task WaitReaderTime 0.000s | Percentage 100.00%
    2019-01-09 02:06:36.992 [job-0] INFO  JobContainer - 
    任务启动时刻                    : 2019-01-09 02:06:26
    任务结束时刻                    : 2019-01-09 02:06:36
    任务总计耗时                    :                 10s
    任务平均流量                    :                0B/s
    记录写入速度                    :              0rec/s
    读出记录总数                    :                   2
    读写失败总数                    :                   0
    
    
    
    #由上可以看出，有些不严谨的会有警告弹出

同理，我们可以获取Oracle-Oracle模板或者Oracle-MySQL模板等等，配置json后运行即可。