springcloud alibaba 整合 seata 完整 安装和配置

1.下载seata

1. 下载地址 ：https://github.com/seata/seata/releases 我使用的版本是1.4.1

2.配置服务端

1. 启动nacos 创建seata namespace 
3.  修改registry.conf

   registry {
     # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
     type = "nacos"
     loadBalance = "RandomLoadBalance"
     loadBalanceVirtualNodes = 10
   
     nacos {
       application = "seata-server"
       serverAddr = "127.0.0.1:8849"
       group = "seata_group"
       namespace = "d3cca02c-6317-474d-bced-6715cf3fa658"
       cluster = "default"
     }
   
   }
   
   config {
   
     type = "file"
     file {
       name = "file.conf"
     }
   }
   

   namesapce 为第一步当中创建的命名空间ID group 为自己第一步创建的group 我这面用的是小写 跟源码发现seata 自动转换大小写 （不知道是不是会影响，后续没去验证建议小写） 配置用的是file 类型

4. 修改file.conf 无用配置都给去掉了

   ## transaction log store, only used in seata-server
   store {
     ## store mode: file、db、redis
     mode = "db"
   
     ## file store property
     file {
       ## store location dir
       dir = "sessionStore"
       # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
       maxBranchSessionSize = 16384
       # globe session size , if exceeded throws exceptions
       maxGlobalSessionSize = 512
       # file buffer size , if exceeded allocate new buffer
       fileWriteBufferCacheSize = 16384
       # when recover batch read size
       sessionReloadReadSize = 100
       # async, sync
       flushDiskMode = async
     }
   
     ## database store property
     db {
       datasource = "druid"
       dbType = "mysql"
       driverClassName = "com.mysql.jdbc.Driver"
       url = "jdbc:mysql://127.0.0.1:3306/seata"
       user = "root"
       password = "123456"
       minConn = 5
       maxConn = 100
       globalTable = "global_table"
       branchTable = "branch_table"
       lockTable = "lock_table"
       queryLimit = 100
       maxWait = 5000
     }
   
     
   
   }
   

     5，创建数据库 https://github.com/seata/seata/tree/develop/script/server 这是readme当中 给的官方sql 脚本自己去下载 创建数据库

    6.启动  bin/seata-server.bat 或者 seata-server.sh 启动成功端口默认8091

3.配置seata客户端

1. 引入依赖

2.         
               com.alibaba.cloud
               spring-cloud-starter-alibaba-seata
               2021.1
           
           
               io.seata
               seata-spring-boot-starter
               1.3.0
           

3.  服务端处理bootstrap.yml 文件外新增 application.yml 内容如下

   seata:
     enabled: true
     application-id: #自己服务ID
     tx-service-group: test_tx_group
     enable-auto-data-source-proxy: true
     use-jdk-proxy: false
     excludes-for-auto-proxying: firstClassNameForExclude,secondClassNameForExclude
     client:
       rm:
         async-commit-buffer-limit: 1000
         report-retry-count: 5
         table-meta-check-enable: false
         report-success-enable: false
         saga-branch-register-enable: false
         lock:
           retry-interval: 10
           retry-times: 30
           retry-policy-branch-rollback-on-conflict: true
       tm:
         commit-retry-count: 5
         rollback-retry-count: 5
       undo:
         data-validation: true
         log-serialization: jackson
         log-table: undo_log
       log:
         exceptionRate: 100
     service:
       vgroup-mapping:
         renren_tx_group: default
       enable-degrade: false
       disable-global-transaction: false
     transport:
       shutdown:
         wait: 3
       thread-factory:
         boss-thread-prefix: NettyBoss
         worker-thread-prefix: NettyServerNIOWorker
         server-executor-thread-prefix: NettyServerBizHandler
         share-boss-worker: false
         client-selector-thread-prefix: NettyClientSelector
         client-selector-thread-size: 1
         client-worker-thread-prefix: NettyClientWorkerThread
         worker-thread-size: default
         boss-thread-size: 1
       type: TCP
       server: NIO
       heartbeat: true
       serialization: seata
       compressor: none
       enable-client-batch-send-request: true
     config:
       type: file
     registry:
       type: nacos
       nacos:
         application: seata-server
         #修改对应端口
         server-addr: localhost:8849
         #修改对应namespace
         namespace: d3cca02c-6317-474d-bced-6715cf3fa658
         userName: ""
         password: ""
         #和服务端保持一致
         group: seata_group

   3.关注下上述文件备注

4. bootstrap.yml 新增配置

5. spring:
     cloud:
       alibaba:
         seata:
           #和上述yml 配置要求一致
           tx-service-group: test_tx_group

4 .使用 方法前添加注解 

@GlobalTransactional
@Transactional(rollbackFor = Exception.class)

5.项目运行 情况

1.注意项：1.要不要README 中的 config.txt 去加载到nacos 我这面使用的是file 配置不需要

 

                  2.项目启动后 no service avaliable  seata 的nacos 配置有问题关注上述配置文件的注释

6.其他官方文档 参阅 Seata 官方原理看官方