Spring Cloud Alibaba 分布式事务seata

Seata 是一款开源的分布式事务解决方案，致力于提供高性能和简单易用的分布式事务服务。Seata 将为用户提供了 AT、TCC、SAGA 和 XA 事务模式，为用户打造一站式的分布式解决方案。

版本选择

版本说明

安装

项目中的库需要执行，sql文件路径：https://github.com/seata/seata/tree/develop/script/client

seata服务 需要sql https://github.com/seata/seata/tree/develop/script/server

下载二进制包（windows下载zip、linux下载tar.gz）：https://github.com/seata/seata/releases

解压后修改配置

• 修改registry.conf文件
  把registry{type = "file"}改为type = "nacos" 表示使用nacos作为注册中心
  把registry{nacos{}}配置修改为以下配置 配置内容根据自己项目配置同步

nacos {
    #服务注册名称（seata项目本身算是个微服务）
    application = "seata-server"
    #nacos的注册地址
    serverAddr = "127.0.0.1:8848"
    #服务所在分组
    group = "SEATA_GROUP"
    #服务的命名空间
    namespace = "seata"
    cluster = "default"
    username = ""
    password = ""
  }

把config{type="file"}改为config{type="nacos"} 表示使用nacos读取seata服务的配置
把config{nacos{}}配置修改为以下配置 配置内容根据自己nacos存储seata配置位置一致

nacos {
    serverAddr = "127.0.0.1:8848"
    namespace = "seata"
    group = "SEATA_GROUP"
    username = ""
    password = ""
  }

seata1.0以上版本只有源码包有config.txt文件，所以可以下载对应的源码包执行推送配置到nacos的操作
修改seata-1.3.0\script\config-center\config.txt的配置

transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.enableClientBatchSendRequest=false
transport.threadFactory.bossThreadPrefix=NettyBoss
transport.threadFactory.workerThreadPrefix=NettyServerNIOWorker
transport.threadFactory.serverExecutorThreadPrefix=NettyServerBizHandler
transport.threadFactory.shareBossWorker=false
transport.threadFactory.clientSelectorThreadPrefix=NettyClientSelector
transport.threadFactory.clientSelectorThreadSize=1
transport.threadFactory.clientWorkerThreadPrefix=NettyClientWorkerThread
transport.threadFactory.bossThreadSize=1
transport.threadFactory.workerThreadSize=default
transport.shutdown.wait=3
#这个到时候项目配置yml的时候要一致，最好不改
service.vgroupMapping.my_test_tx_group=default
#这个是事务微服务的启动的服务器地址和端口（我的8081被jenkins占用了所以用8089）
service.default.grouplist=tx.ovozz.com:8099
service.enableDegrade=false
service.disableGlobalTransaction=false
client.rm.asyncCommitBufferLimit=10000
client.rm.lock.retryInterval=10
client.rm.lock.retryTimes=30
client.rm.lock.retryPolicyBranchRollbackOnConflict=true
client.rm.reportRetryCount=5
client.rm.tableMetaCheckEnable=false
client.rm.sqlParserType=druid
client.rm.reportSuccessEnable=false
client.rm.sagaBranchRegisterEnable=false
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000
store.mode=db
store.file.dir=file_store/data
store.file.maxBranchSessionSize=16384
store.file.maxGlobalSessionSize=512
store.file.fileWriteBufferCacheSize=16384
store.file.flushDiskMode=async
store.file.sessionReloadReadSize=100
store.db.datasource=druid
#对应的数据库地址，到时候要执行sql的库对应
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://tx.ovozz.com:3306/seata?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=Asia/Shanghai
store.db.user=seata
store.db.password=seata
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000
store.redis.host=127.0.0.1
store.redis.port=6379
store.redis.maxConn=10
store.redis.minConn=1
store.redis.database=0
store.redis.password=null
store.redis.queryLimit=100
server.recovery.committingRetryPeriod=1000
server.recovery.asynCommittingRetryPeriod=1000
server.recovery.rollbackingRetryPeriod=1000
server.recovery.timeoutRetryPeriod=1000
server.maxCommitRetryTimeout=-1
server.maxRollbackRetryTimeout=-1
server.rollbackRetryTimeoutUnlockEnable=false
client.undo.dataValidation=true
client.undo.logSerialization=jackson
client.undo.onlyCareUpdateColumns=true
server.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000
client.undo.logTable=undo_log
client.log.exceptionRate=100
transport.serialization=seata
transport.compressor=none
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898

执行seata-1.3.0\script\config-center\nacos\nacos-config.sh 对应着上面registry.conf文件的config{nacos{}}配置，参数-p端口 -g 分钟 -t 命名空间....

./nacos-config.sh -h tx.ovozz.com -p 8099 -g SEATA_GROUP -t seata

对应的naocs中的配置出现以下配置表示成功

• 修改file.conf存储方式为mysql
  vi file.conf 把mode = "file"改为mode = "db"
  数据库配置修改

  db {
    ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp)/HikariDataSource(hikari) etc.
    datasource = "druid"
    ## mysql/oracle/postgresql/h2/oceanbase etc.
    dbType = "mysql"
    driverClassName = "com.mysql.jdbc.Driver"
    url = "jdbc:mysql://127.0.0.1:3306/seata"
    user = "seata"
    password = "seata"
    minConn = 5
    maxConn = 30
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }

项目配置

application.yml

management:
  endpoints:
    web:
      exposure:
        include: '*'
server:
  port: 7001
spring:
  application:
    name: cloud-order-service
  cloud:
    nacos:
      discovery:
        server-addr: tx.ovozz.com:8848
        namespace: cloud-demo
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driverClassName: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://tx.ovozz.com:3306/seata_order?autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
    username: seata_order
    password: seata_order

#分布式事务配置
seata:
  application-id: ${spring.application.name}
  enabled: true
  enable-auto-data-source-proxy: true
  #分组名称
  tx-service-group: my_test_tx_group
  #服务配置
  service:
    disable-global-transaction: false
    vgroup-mapping:
      my_test_tx_group: default
    grouplist:
      default: tx.ocozz.com:8099
  #配置中心配置
  config:
    type: nacos
    nacos:
      application: seata-server
      namespace: seata
      serverAddr: tx.ovozz.com:8848
      group: SEATA_GROUP
  #注册中心配置
  registry:
    type: nacos
    nacos:
      application: seata-server
      namespace: seata
      server-addr: tx.ovozz.com:8848
      group: SEATA_GROUP

pom

        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-seata