Seata的部署和集成

一、部署Seata的tc-server

1.下载

下载seata-server地址在:http://seata.io/zh-cn/blog/download.html,版本:1.5.1。或使用提供好的资料中的:seata-server-1.5.1.zip

2.解压

在非中文目录解压缩这个zip包,其目录结构如下:

Seata的部署和集成_第1张图片

3.修改配置

修改conf目录下的application.yml文件,内容如下:

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:
  config:
    # 读取tc服务端的配置文件的方式,这里是从nacos配置中心读取,这样如果tc是集群,可以共享配置
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      namespace:
      group: SEATA_GROUP
      username: nacos
      password: nacos
      ##if use MSE Nacos with auth, mutex with username/password attribute
      #access-key: ""
      #secret-key: ""
      data-id: seataServer.properties
  registry:
    # tc服务的注册中心类,这里选择nacos,也可以是eureka、zookeeper等
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      group: DEFAULT_GROUP
      namespace:
      cluster: GZ
      username: nacos
      password: nacos

#  server:
#    service-port: 8091 #If not configured, the default is '${server.port} + 1000'
  security:
    secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
    tokenValidityInMilliseconds: 1800000
    ignore:
      urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-fe/public/**,/api/v1/auth/login

4.在nacos添加配置

特别注意,为了让tc服务的集群可以共享配置,我们选择了nacos作为统一配置中心。因此服务端配置文件seataServer.properties文件需要在nacos中配好。格式如下:

Seata的部署和集成_第2张图片

配置内容如下:

# 数据存储方式,db代表数据库
store.mode=db
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?useUnicode=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=root
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
# 事务、日志等配置
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.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000

# 客户端与服务端传输方式
transport.serialization=seata
transport.compressor=none
# 关闭metrics功能,提高性能
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898

其中的数据库地址、用户名、密码都需要修改成你自己的数据库信息。

5.创建数据库表

特别注意:tc服务在管理分布式事务时,需要记录事务相关数据到数据库中,你需要提前创建好这些表。

新建一个名为seata的数据库,运行sql(这些表主要记录全局事务、分支事务、全局锁信息):

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- 分支事务表
-- ----------------------------
DROP TABLE IF EXISTS `branch_table`;
CREATE TABLE `branch_table`  (
  `branch_id` bigint(20) NOT NULL,
  `xid` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `transaction_id` bigint(20) NULL DEFAULT NULL,
  `resource_group_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `branch_type` varchar(8) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `status` tinyint(4) NULL DEFAULT NULL,
  `client_id` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `gmt_create` datetime(6) NULL DEFAULT NULL,
  `gmt_modified` datetime(6) NULL DEFAULT NULL,
  PRIMARY KEY (`branch_id`) USING BTREE,
  INDEX `idx_xid`(`xid`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;

-- ----------------------------
-- 全局事务表
-- ----------------------------
DROP TABLE IF EXISTS `global_table`;
CREATE TABLE `global_table`  (
  `xid` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `transaction_id` bigint(20) NULL DEFAULT NULL,
  `status` tinyint(4) NOT NULL,
  `application_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `transaction_service_group` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `transaction_name` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `timeout` int(11) NULL DEFAULT NULL,
  `begin_time` bigint(20) NULL DEFAULT NULL,
  `application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `gmt_create` datetime NULL DEFAULT NULL,
  `gmt_modified` datetime NULL DEFAULT NULL,
  PRIMARY KEY (`xid`) USING BTREE,
  INDEX `idx_gmt_modified_status`(`gmt_modified`, `status`) USING BTREE,
  INDEX `idx_transaction_id`(`transaction_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;

SET FOREIGN_KEY_CHECKS = 1;

6.启动TC服务

进入bin目录,运行其中的seata-server.bat即可,启动成功后,seata-server应该已经注册到nacos注册中心了。打开浏览器,访问seata控制台;地址:http://localhost:7091

Seata的部署和集成_第3张图片

打开浏览器,访问nacos地址:http://localhost:8848/nacos,然后进入服务列表页面,可以看到seata-server的信息:

Seata的部署和集成_第4张图片

二、微服务集成seata

需要进行分布式事务处理的每个微服务上都配置如下:

1.引入依赖

首先,我们需要在每个微服务中引入seata依赖:


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



    io.seata
    seata-spring-boot-starter
    ${seata.version}

2.修改配置文件

需要修改每个微服务中的application.yml文件,添加一些配置:

seata:
  registry: # TC服务注册中心的配置,微服务根据这些信息去注册中心获取tc服务地址
    # 参考tc服务自己的application.yml中的配置
    type: nacos
    nacos: # tc
      server-addr: 127.0.0.1:8848
      namespace: ""
      group: DEFAULT_GROUP
      application: seata-server # tc服务在nacos中的服务名称
      cluster: GZ  #无效
  tx-service-group: seata-demo # 事务组,根据这个获取tc服务的cluster名称
  service:
    vgroup-mapping: # 事务组与TC服务cluster的映射关系
      seata-demo: GZ

三、TC服务的高可用和异地容灾

1.模拟异地容灾的TC集群

计划启动两台seata的tc服务节点:

节点名称

ip地址

端口号

集群名称

seata

127.0.0.1

8091

GZ

seata2

127.0.0.1

8092

HZ

之前我们已经启动了一台seata服务,端口是8091,集群名为GZ。现在,将seata目录复制一份,起名为seata2。修改seata2/conf/application.yml内容如下:

server:
  port: 7092

spring:
  application:
    name: seata-server

logging:
  config: classpath:logback-spring.xml
  file:
    path: ${user.home}/logs/seata

console:
  user:
    username: seata
    password: seata

seata:
  config:
    # 读取tc服务端的配置文件的方式,这里是从nacos配置中心读取,这样如果tc是集群,可以共享配置
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      namespace:
      group: SEATA_GROUP
      username: nacos
      password: nacos
      ##if use MSE Nacos with auth, mutex with username/password attribute
      #access-key: ""
      #secret-key: ""
      data-id: seataServer.properties
  registry:
    # tc服务的注册中心类,这里选择nacos,也可以是eureka、zookeeper等
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      group: DEFAULT_GROUP
      namespace:
      cluster: HZ
      username: nacos
      password: nacos

  server:
    service-port: 8092 #If not configured, the default is '${server.port} + 1000'
  security:
    secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
    tokenValidityInMilliseconds: 1800000
    ignore:
      urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-fe/public/**,/api/v1/auth/login

进入seata2/bin目录,然后运行双击 seata-server.bat。打开nacos控制台,查看服务列表:

Seata的部署和集成_第5张图片

点进详情查看:

Seata的部署和集成_第6张图片

2.将事务组映射配置到nacos

接下来,我们需要将tx-service-group与cluster的映射关系都配置到nacos配置中心。新建一个配置:

Seata的部署和集成_第7张图片

配置的内容如下:

# 事务组映射关系
service.vgroupMapping.seata-demo=GZ

service.enableDegrade=false
service.disableGlobalTransaction=false
# 与TC服务的通信配置
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
# RM配置
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.tableMetaCheckerInterval=60000
client.rm.sqlParserType=druid
client.rm.reportSuccessEnable=false
client.rm.sagaBranchRegisterEnable=false
# TM配置
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.defaultGlobalTransactionTimeout=60000
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000

# undo日志配置
client.undo.dataValidation=true
client.undo.logSerialization=jackson
client.undo.onlyCareUpdateColumns=true
client.undo.logTable=undo_log
client.undo.compress.enable=true
client.undo.compress.type=zip
client.undo.compress.threshold=64k
client.log.exceptionRate=100

3.微服务读取nacos配置

接下来,需要修改每一个微服务的application.yml文件,让微服务读取nacos中的client.properties文件:

seata:
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      username: nacos
      password: nacos
      group: SEATA_GROUP
      data-id: client.properties

也注释掉原来文件中的如下内容(如果不注释也可以;则作为一个默认,对动态切换集群不受影响):

service:
vgroup-mapping: # 事务组与TC服务cluster的映射关系
 seata-demo: GZ

重启微服务,现在微服务到底是连接tc的GZ集群,还是tc的HZ集群,都统一由nacos的client.properties来决定了。

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