springcloud集成seata(AT)分布式事务

一、下载seata server和seata源码

alibaba seata  分为server和client（java）两个部分组成，server是独立的jar服务，需要从seata 官网或github下载。
seata官方文档：http://seata.io/zh-cn/docs/user/quickstart.html 

seata server下载地址：https://github.com/seata/seata/releases 

笔者下载的是1.6版本 seata-server-1.6.0.zip ，加压缩seata-server-1.6.0.zip ,得到seata-1.6.0目

seata 源代码下载： https://github.com/seata/seata

git clone https://github.com/seata/seata
cd seata

git checkout -b 1.6.0 origin/1.6.0

二、配置启动seata server

2.1 在nacos控制台，新建一个seata的名称空间，用于存放seata的专用配置

     名称空间id :seata

     名称空间名称:seata 

     备注：seata

2.2 创建seata server的mysql库
创建seata的mysql的db:

CREATE DATABASE seata_1.6  DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci;

找到 seata-1.6\script\server\db\下的mysql.sql文件， 在 seata_1.6   db中执行，生成seata server所需要的表。

2.3 在nacos上配置seata相关配置 （seata名称空间）
在nacos的seata空间下，创建一个seataServer.properties的配置 和service.vgroupMapping.default_tx_group 配置值为default

seataServer.properties配置内容如下：

#For details about configuration items, see https://seata.io/zh-cn/docs/user/configurations.html
#Transport configuration, for client and server
transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.enableTmClientBatchSendRequest=false
transport.enableRmClientBatchSendRequest=true
transport.enableTcServerBatchSendResponse=false
transport.rpcRmRequestTimeout=30000
transport.rpcTmRequestTimeout=30000
transport.rpcTcRequestTimeout=30000
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
transport.serialization=seata
transport.compressor=none
 
#Transaction routing rules configuration, only for the client
service.vgroupMapping.default_tx_group=default
#If you use a registry, you can ignore it
#service.default.grouplist=127.0.0.1:8091
 
service.enableDegrade=false
service.disableGlobalTransaction=false
 
#Transaction rule configuration, only for the client
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=true
client.rm.tableMetaCheckerInterval=60000
client.rm.sqlParserType=druid
client.rm.reportSuccessEnable=false
client.rm.sagaBranchRegisterEnable=false
client.rm.sagaJsonParser=fastjson
client.rm.tccActionInterceptorOrder=-2147482648
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.defaultGlobalTransactionTimeout=60000
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000
client.tm.interceptorOrder=-2147482648
client.undo.dataValidation=true
client.undo.logSerialization=kryo
client.undo.onlyCareUpdateColumns=true
server.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000
client.undo.logTable=undo_log
client.undo.compress.enable=true
client.undo.compress.type=zip
client.undo.compress.threshold=64k
#For TCC transaction mode
tcc.fence.logTableName=tcc_fence_log
tcc.fence.cleanPeriod=1h
 
#Log rule configuration, for client and server
log.exceptionRate=100
 
#Transaction storage configuration, only for the server. The file, db, and redis configuration values are optional.
store.mode=db
store.lock.mode=file
store.session.mode=file
#Used for password encryption
store.publicKey=
 
#If `store.mode,store.lock.mode,store.session.mode` are not equal to `file`, you can remove the configuration block.
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
 
#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.
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://127.0.0.1:3306/seata_1.6?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8&allowMultiQueries=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=123456
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.distributedLockTable=distributed_lock
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000
 
#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.
store.redis.mode=single
store.redis.single.host=127.0.0.1
store.redis.single.port=6379
store.redis.sentinel.masterName=
store.redis.sentinel.sentinelHosts=
store.redis.maxConn=10
store.redis.minConn=1
store.redis.maxTotal=100
store.redis.database=0
store.redis.password=
store.redis.queryLimit=100
 
#Transaction rule configuration, only for the server
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
server.distributedLockExpireTime=10000
server.xaerNotaRetryTimeout=60000
server.session.branchAsyncQueueSize=5000
server.session.enableBranchAsyncRemove=false
server.enableParallelRequestHandle=false
 
#Metrics configuration, only for the server
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898

2.4 启动seata server
 修改 seata\config\application.yml配置

 
server:
  port: 7091
 
spring:
  application:
    name: seata-server
 
logging:
  config: classpath:logback-spring.xml
  file:
    path: ${user.home}/logs/seata
 
console:
  user:
    username: seata
    password: seata
  
seata:
  security:
    secretKey: icilfnMRQmKi847ofQUD9UrNaStS9sl0tKlc21s6uSBRbrSldZzVLuPMEfkZZlP3
    tokenValidityInMilliseconds: 1800000
    ignore:
      urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-fe/public/**,/api/v1/auth/login
 
  config:
    # support: nacos 、 consul 、 apollo 、 zk  、 etcd3
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8850
      namespace: seata
      group: DEFAULT_GROUP
      username: nacos
      password: nacos
      context-path: 
      data-id: seataServer.properties
 
      
  registry:
    type: nacos
    #preferred-networks: 30.240.*
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8850
      group: DEFAULT_GROUP
      namespace: seata
      cluster: default
      username: nacos
      password: nacos
      context-path:
  server:
    service-port: 8091 #If not configured, the default is '${server.port} + 1000'
    max-commit-retry-timeout: -1
    max-rollback-retry-timeout: -1
    rollback-retry-timeout-unlock-enable: false
    enable-check-auth: true
    enable-parallel-request-handle: true
    retry-dead-threshold: 130000
    xaer-nota-retry-timeout: 60000
    recovery:
      committing-retry-period: 1000
      async-committing-retry-period: 1000
      rollbacking-retry-period: 1000
      timeout-retry-period: 1000
    undo:
      log-save-days: 7
      log-delete-period: 86400000
    session:
      branch-async-queue-size: 5000 #branch async remove queue size
      enable-branch-async-remove: false #enable to asynchronous remove branchSession
  store:
    # support: file 、 db 、 redis
    mode: db
    session:
      mode: db
    lock:
      mode: db
    file:
      dir: sessionStore
      max-branch-session-size: 16384
      max-global-session-size: 512
      file-write-buffer-cache-size: 16384
      session-reload-read-size: 100
      flush-disk-mode: async
    db:
      datasource: druid
      db-type: mysql
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://127.0.0.1:3306/seata_1.6?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8&allowMultiQueries=true&rewriteBatchedStatements=true
      user: root
      password: 123456
      min-conn: 5
      max-conn: 100
      global-table: global_table
      branch-table: branch_table
      lock-table: lock_table
      distributed-lock-table: distributed_lock
      query-limit: 100
      max-wait: 5000
 
  metrics:
    enabled: false
    registry-type: compact
    exporter-list: prometheus
    exporter-prometheus-port: 9898
  transport:
    rpc-tc-request-timeout: 30000
    enable-tc-server-batch-send-response: false
    shutdown:
      wait: 3
    thread-factory:
      boss-thread-prefix: NettyBoss
      worker-thread-prefix: NettyServerNIOWorker
      boss-thread-size: 1

找到 seata-1.6\bin ，执行seata-server.bat （windows） 或seata-server.sh （linux）启动

seata-server.bat  -m db  

（启动参数 

-h 主机名地址 

-p 端口(默认8090)

-m 存储模式默认file，支持db、redis等

-n 节点， 默认1

-e 环境 ，默认无

）

 seata 管理控制台，用户名及密码: seata/seata

三、springcloud客户端服务集成

   1、pom.xml引入

  <!-- seata-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
        </dependency>

        <!--  seata kryo 序列化-->
        <dependency>
            <groupId>io.seata</groupId>
            <artifactId>seata-serializer-kryo</artifactId>
            <version>1.5.2</version>
        </dependency>

2、application.yml配置

seata:
  enabled: true
  tx-service-group: default_tx_group
  service:
    vgroup-mapping:
      default_tx_group: default
  registry:
    type: nacos
    nacos:
      application: seata-server
      server-addr: localhost:8850
      namespace: seata
      group: DEFAULT_GROUP
  config:
    type: nacos #配置中心
    nacos:
      server-addr: localhost:8850
      namespace: seata
      group: DEFAULT_GROUP
      data-id: seataServer.properties

控制台查看全局事务信息

undo_log表 

二阶段回滚事务日志