分布式事务解决方案：Spring Cloud + Nacos + Seata整合

转x33g5p2x  于2022-02-28 转载在 Spring  
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一、简介

Seata 是一款开源的分布式事务解决方案，致力于在微服务架构下提供高性能和简单易用的分布式事务服务。
   2019 年 1 月，阿里巴巴中间件团队发起了开源项目 Fescar（Fast & EaSy Commit And Rollback），和社区一起共建开源分布式事务解决方案。Fescar 的愿景是让分布式事务的使用像本地事务的使用一样，简单和高效，并逐步解决开发者们遇到的分布式事务方面的所有难题。
  Fescar 开源后，蚂蚁金服加入 Fescar 社区参与共建，并在 Fescar 0.4.0 版本中贡献了 TCC 模式。
  为了打造更中立、更开放、生态更加丰富的分布式事务开源社区，经过社区核心成员的投票，大家决定对 Fescar 进行品牌升级，并更名为 Seata，意为：Simple Extensible Autonomous Transaction Architecture，是一套一站式分布式事务解决方案。

二、seata-server部署

1、官网下载

我们可以看到Seata的github star数有2万多，说明还是热门的！
我们下载最新版本v1.4.2 https://github.com/seata/seata/releases/download/v1.4.2/seata-server-1.4.2.zip

2、解压到本地

3、修改配置文件

第一步，修改conf/registry.conf，重点修改nacos配置。

  1. registry {
  2.   # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  3.   type = "nacos"
  5.   nacos {
  6.     application = "seata-server"
  7.     serverAddr = "127.0.0.1:8848"
  8.     group = "SEATA_GROUP"
  9.     namespace = ""
  10.     cluster = "default"
  11.     username = "nacos"
  12.     password = "nacos"
  13.   }
  15. ......
  17. config {
  18.   # file、nacos 、apollo、zk、consul、etcd3
  19.   type = "nacos"
  21.   nacos {
  22.     serverAddr = "127.0.0.1:8848"
  23.     namespace = ""
  24.     group = "SEATA_GROUP"
  25.     username = "nacos"
  26.     password = "nacos"
  27.     dataId = "seataServer.properties"
  28.   }
  29. }

最新！现在支持配置dataId，就可以把所有配置放里面。（其他地方的博客还在说，去下载config.txt、nacos-config.sh，然后执行跑到nacos上去，过时了！多关注nacos版本更新）

第二步，在Nacos上新增seataServer.properties

里面的内容：

  1. #For details about configuration items, see https://seata.io/zh-cn/docs/user/configurations.html
  2. #Transport configuration, for client and server
  3. transport.type=TCP
  4. transport.server=NIO
  5. transport.heartbeat=true
  6. transport.enableTmClientBatchSendRequest=false
  7. transport.enableRmClientBatchSendRequest=true
  8. transport.enableTcServerBatchSendResponse=false
  9. transport.rpcRmRequestTimeout=30000
  10. transport.rpcTmRequestTimeout=30000
  11. transport.rpcTcRequestTimeout=30000
  12. transport.threadFactory.bossThreadPrefix=NettyBoss
  13. transport.threadFactory.workerThreadPrefix=NettyServerNIOWorker
  14. transport.threadFactory.serverExecutorThreadPrefix=NettyServerBizHandler
  15. transport.threadFactory.shareBossWorker=false
  16. transport.threadFactory.clientSelectorThreadPrefix=NettyClientSelector
  17. transport.threadFactory.clientSelectorThreadSize=1
  18. transport.threadFactory.clientWorkerThreadPrefix=NettyClientWorkerThread
  19. transport.threadFactory.bossThreadSize=1
  20. transport.threadFactory.workerThreadSize=default
  21. transport.shutdown.wait=3
  22. transport.serialization=seata
  23. transport.compressor=none
  25. #Transaction routing rules configuration, only for the client
  26. service.vgroupMapping.default_tx_group=default
  27. #If you use a registry, you can ignore it
  28. service.default.grouplist=127.0.0.1:8091
  29. service.enableDegrade=false
  30. service.disableGlobalTransaction=false
  32. #Transaction rule configuration, only for the client
  33. client.rm.asyncCommitBufferLimit=10000
  34. client.rm.lock.retryInterval=10
  35. client.rm.lock.retryTimes=30
  36. client.rm.lock.retryPolicyBranchRollbackOnConflict=true
  37. client.rm.reportRetryCount=5
  38. client.rm.tableMetaCheckEnable=false
  39. client.rm.tableMetaCheckerInterval=60000
  40. client.rm.sqlParserType=druid
  41. client.rm.reportSuccessEnable=false
  42. client.rm.sagaBranchRegisterEnable=false
  43. client.rm.sagaJsonParser=fastjson
  44. client.rm.tccActionInterceptorOrder=-2147482648
  45. client.rm.sqlParserType=druid
  46. client.tm.commitRetryCount=5
  47. client.tm.rollbackRetryCount=5
  48. client.tm.defaultGlobalTransactionTimeout=60000
  49. client.tm.degradeCheck=false
  50. client.tm.degradeCheckAllowTimes=10
  51. client.tm.degradeCheckPeriod=2000
  52. client.tm.interceptorOrder=-2147482648
  53. client.undo.dataValidation=true
  54. client.undo.logSerialization=jackson
  55. client.undo.onlyCareUpdateColumns=true
  56. server.undo.logSaveDays=7
  57. server.undo.logDeletePeriod=86400000
  58. client.undo.logTable=undo_log
  59. client.undo.compress.enable=true
  60. client.undo.compress.type=zip
  61. client.undo.compress.threshold=64k
  62. #For TCC transaction mode
  63. tcc.fence.logTableName=tcc_fence_log
  64. tcc.fence.cleanPeriod=1h
  66. #Log rule configuration, for client and server
  67. log.exceptionRate=100
  69. #Transaction storage configuration, only for the server. The file, DB, and redis configuration values are optional.
  70. store.mode=db
  71. store.lock.mode=file
  72. store.session.mode=file
  73. #Used for password encryption
  74. store.publicKey=
  76. #If `store.mode,store.lock.mode,store.session.mode` are not equal to `file`, you can remove the configuration block.
  77. store.file.dir=file_store/data
  78. store.file.maxBranchSessionSize=16384
  79. store.file.maxGlobalSessionSize=512
  80. store.file.fileWriteBufferCacheSize=16384
  81. store.file.flushDiskMode=async
  82. store.file.sessionReloadReadSize=100
  84. #These configurations are required if the `store mode` is `db`. If `store.mode,store.lock.mode,store.session.mode` are not equal to `db`, you can remove the configuration block.
  85. store.db.datasource=druid
  86. store.db.dbType=mysql
  87. store.db.driverClassName=com.mysql.cj.jdbc.Driver
  88. store.db.url=jdbc:mysql://localhost:3306/seata?useUnicode=true&rewriteBatchedStatements=true
  89. store.db.user=root
  90. store.db.password=root
  91. store.db.minConn=5
  92. store.db.maxConn=30
  93. store.db.globalTable=global_table
  94. store.db.branchTable=branch_table
  95. store.db.distributedLockTable=distributed_lock
  96. store.db.queryLimit=100
  97. store.db.lockTable=lock_table
  98. store.db.maxWait=5000
  100. #These configurations are required if the `store mode` is `redis`. If `store.mode,store.lock.mode,store.session.mode` are not equal to `redis`, you can remove the configuration block.
  101. store.redis.mode=single
  102. store.redis.single.host=127.0.0.1
  103. store.redis.single.port=6379
  104. store.redis.sentinel.masterName=
  105. store.redis.sentinel.sentinelHosts=
  106. store.redis.maxConn=10
  107. store.redis.minConn=1
  108. store.redis.maxTotal=100
  109. store.redis.database=0
  110. store.redis.password=
  111. store.redis.queryLimit=100
  113. #Transaction rule configuration, only for the server
  114. server.recovery.committingRetryPeriod=1000
  115. server.recovery.asynCommittingRetryPeriod=1000
  116. server.recovery.rollbackingRetryPeriod=1000
  117. server.recovery.timeoutRetryPeriod=1000
  118. server.maxCommitRetryTimeout=-1
  119. server.maxRollbackRetryTimeout=-1
  120. server.rollbackRetryTimeoutUnlockEnable=false
  121. server.distributedLockExpireTime=10000
  122. server.session.branchAsyncQueueSize=5000
  123. server.session.enableBranchAsyncRemove=true
  125. #Metrics configuration, only for the server
  126. metrics.enabled=false
  127. metrics.registryType=compact
  128. metrics.exporterList=prometheus
  129. metrics.exporterPrometheusPort=9898

第三步，修改file.conf，修改为db模式，并连接MySQL

  1. ## transaction log store, only used in seata-server
  2. store {
  3.   ## store mode: file、db、redis
  4.   mode = "db"
  5.   
  6.   ......
  8.   ## database store property
  9.   db {
  10.     ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp)/HikariDataSource(hikari) etc.
  11.     datasource = "druid"
  12.     ## mysql/oracle/postgresql/h2/oceanbase etc.
  13.     dbType = "mysql"
  14.     driverClassName = "com.mysql.cj.jdbc.Driver"
  15.     ## if using mysql to store the data, recommend add rewriteBatchedStatements=true in jdbc connection param
  16.     url = "jdbc:mysql://localhost:3306/seata?rewriteBatchedStatements=true"
  17.     user = "root"
  18.     password = "root"
  19.     minConn = 5
  20.     maxConn = 100
  21.     globalTable = "global_table"
  22.     branchTable = "branch_table"
  23.     lockTable = "lock_table"
  24.     queryLimit = 100
  25.     maxWait = 5000
  26.   }
  27.   ......
  28. }

4、seata数据库初始化

  1. -- -------------------------------- The script used when storeMode is 'db' --------------------------------
  2. -- the table to store GlobalSession data
  3. CREATE TABLE IF NOT EXISTS `global_table`
  4. (
  5.     `xid`                       VARCHAR(128) NOT NULL,
  6.     `transaction_id`            BIGINT,
  7.     `status`                    TINYINT      NOT NULL,
  8.     `application_id`            VARCHAR(32),
  9.     `transaction_service_group` VARCHAR(32),
  10.     `transaction_name`          VARCHAR(128),
  11.     `timeout`                   INT,
  12.     `begin_time`                BIGINT,
  13.     `application_data`          VARCHAR(2000),
  14.     `gmt_create`                DATETIME,
  15.     `gmt_modified`              DATETIME,
  16.     PRIMARY KEY (`xid`),
  17.     KEY `idx_status_gmt_modified` (`status` , `gmt_modified`),
  18.     KEY `idx_transaction_id` (`transaction_id`)
  19. ) ENGINE = InnoDB
  20.   DEFAULT CHARSET = utf8;
  22. -- the table to store BranchSession data
  23. CREATE TABLE IF NOT EXISTS `branch_table`
  24. (
  25.     `branch_id`         BIGINT       NOT NULL,
  26.     `xid`               VARCHAR(128) NOT NULL,
  27.     `transaction_id`    BIGINT,
  28.     `resource_group_id` VARCHAR(32),
  29.     `resource_id`       VARCHAR(256),
  30.     `branch_type`       VARCHAR(8),
  31.     `status`            TINYINT,
  32.     `client_id`         VARCHAR(64),
  33.     `application_data`  VARCHAR(2000),
  34.     `gmt_create`        DATETIME(6),
  35.     `gmt_modified`      DATETIME(6),
  36.     PRIMARY KEY (`branch_id`),
  37.     KEY `idx_xid` (`xid`)
  38. ) ENGINE = InnoDB
  39.   DEFAULT CHARSET = utf8;
  41. -- the table to store lock data
  42. CREATE TABLE IF NOT EXISTS `lock_table`
  43. (
  44.     `row_key`        VARCHAR(128) NOT NULL,
  45.     `xid`            VARCHAR(128),
  46.     `transaction_id` BIGINT,
  47.     `branch_id`      BIGINT       NOT NULL,
  48.     `resource_id`    VARCHAR(256),
  49.     `table_name`     VARCHAR(32),
  50.     `pk`             VARCHAR(36),
  51.     `status`         TINYINT      NOT NULL DEFAULT '0' COMMENT '0:locked ,1:rollbacking',
  52.     `gmt_create`     DATETIME,
  53.     `gmt_modified`   DATETIME,
  54.     PRIMARY KEY (`row_key`),
  55.     KEY `idx_status` (`status`),
  56.     KEY `idx_branch_id` (`branch_id`)
  57. ) ENGINE = InnoDB
  58.   DEFAULT CHARSET = utf8;
  60. CREATE TABLE IF NOT EXISTS `distributed_lock`
  61. (
  62.     `lock_key`       CHAR(20) NOT NULL,
  63.     `lock_value`     VARCHAR(20) NOT NULL,
  64.     `expire`         BIGINT,
  65.     primary key (`lock_key`)
  66. ) ENGINE = InnoDB
  67.   DEFAULT CHARSET = utf8mb4;
  69. INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('HandleAllSession', ' ', 0);

5、业务数据库

在每个需要开启seata事务操作的业务数据库下都需要建立此表。
undo_log：回滚日志表。

  1. --日志文件表--
  2. CREATE TABLE IF NOT EXISTS `undo_log`
  3. (
  4.     `branch_id`     BIGINT       NOT NULL COMMENT 'branch transaction id',
  5.     `xid`           VARCHAR(128) NOT NULL COMMENT 'global transaction id',
  6.     `context`       VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization',
  7.     `rollback_info` LONGBLOB     NOT NULL COMMENT 'rollback info',
  8.     `log_status`    INT(11)      NOT NULL COMMENT '0:normal status,1:defense status',
  9.     `log_created`   DATETIME(6)  NOT NULL COMMENT 'create datetime',
  10.     `log_modified`  DATETIME(6)  NOT NULL COMMENT 'modify datetime',
  11.     UNIQUE KEY `ux_undo_log` (`xid`, `branch_id`)
  12.     ) ENGINE = INNODB
  13.     AUTO_INCREMENT = 1
  14.     DEFAULT CHARSET = utf8 COMMENT ='AT transaction mode undo table';

6、启动seata-server

双击启动bin目录下的seata-server.bat。（linux系统的启动seata-server.sh）

启动成功后，端口是8091。我们也可以在nacos上看到服务注册上来了。

三、微服务项目集成Seata

1、引入依赖

  1. <dependency>
  2.     <groupId>com.alibaba.cloud</groupId>
  3.     <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
  4.     <version>2021.1</version>
  5.     <exclusions>
  6.        <!-- 排除依赖 指定版本和服务器端一致 -->
  7.        <exclusion>
  8.            <groupId>io.seata</groupId>
  9.            <artifactId>seata-all</artifactId>
  10.        </exclusion>
  11.        <exclusion>
  12.            <groupId>io.seata</groupId>
  13.            <artifactId>seata-spring-boot-starter</artifactId>
  14.        </exclusion>
  15.    </exclusions>
  16. </dependency>
  17. <dependency>
  18.     <groupId>io.seata</groupId>
  19.     <artifactId>seata-all</artifactId>
  20.     <version>1.4.2</version>
  21. </dependency>
  22. <dependency>
  23.     <groupId>io.seata</groupId>
  24.     <artifactId>seata-spring-boot-starter</artifactId>
  25.     <version>1.4.2</version>
  26. </dependency>

版本号根据自己的项目需要。

2、配置文件

  1. # 分布式事务配置
  2. seata:
  3.   enabled: true
  4.   enable-auto-data-source-proxy: true #是否开启数据源自动代理,默认为true
  5.   tx-service-group: default_tx_group  #要与配置文件中的vgroupMapping一致
  6.   registry:
  7.     type: nacos
  8.     nacos:
  9.       application: seata-server
  10.       server-addr: 127.0.0.1:8848
  11.       group: SEATA_GROUP
  12.   config:
  13.     type: nacos
  14.     nacos:
  15.       server-addr: 127.0.0.1:8848
  16.       group: SEATA_GROUP
  17.       dataId: seataServer.properties

到这里配置就结束了，赶紧在项目里面用起来吧！如有遇到搭建问题，可以阅读Seata官方文档或者我们一起探讨。

版权说明 : 本文为转载文章, 版权归原作者所有 版权申明

原文链接 : https://yunfan.blog.csdn.net/article/details/123140907

内容来源于网络，如有侵权，请联系作者删除！

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