springcloud + feign + seata1.5.2 + nacos

先介绍一下环境

使用的是SpringCloud Alibaba, SpringBoot 2.3.5.RELEASE, seata1.5.2(linux环境)

首先就是nacos的环境配置，这里就不讲了
seata1.5.2 下载地址：下载中心

 下载下来之后，进行压缩包的解压,解压完之后，进入seata/conf文件夹进行配置文件(application.yml)的配置
 

server:
  port: 7091

spring:
  application:
    name: seata-server

logging:
  config: classpath:logback-spring.xml
  file:
    path: ${user.home}/logs/seata
  extend:
    logstash-appender:
      destination: 127.0.0.1:4560
    kafka-appender:
      bootstrap-servers: 127.0.0.1:9092
      topic: logback_to_logstash

console:
  user:
    username: seata
    password: seata

seata:
  config:
    # support: nacos, consul, apollo, zk, etcd3
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848 nacos的ip及端口
      namespace: seata
      group: SEATA_GROUP
      username: nacos
      password: nacos
      data-id: seataServer.properties
  registry:
    # support: nacos, eureka, redis, zk, consul, etcd3, sofa
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      group: SEATA_GROUP
      namespace: seata
      cluster: default   #这个还是有必要的，如果不配置的话，微服务一直报error
      username: nacos
      password: nacos
#  store:
    # support: file 、 db 、 redis
#    mode: file
#  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

然后创建一个新的数据库"seata",并执行如下sql
 

-- -------------------------------- The script used when storeMode is 'db' --------------------------------
-- the table to store GlobalSession data
CREATE TABLE IF NOT EXISTS `global_table`
(
    `xid`                       VARCHAR(128) NOT NULL,
    `transaction_id`            BIGINT,
    `status`                    TINYINT      NOT NULL,
    `application_id`            VARCHAR(32),
    `transaction_service_group` VARCHAR(32),
    `transaction_name`          VARCHAR(128),
    `timeout`                   INT,
    `begin_time`                BIGINT,
    `application_data`          VARCHAR(2000),
    `gmt_create`                DATETIME,
    `gmt_modified`              DATETIME,
    PRIMARY KEY (`xid`),
    KEY `idx_status_gmt_modified` (`status` , `gmt_modified`),
    KEY `idx_transaction_id` (`transaction_id`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4;
 
-- the table to store BranchSession data
CREATE TABLE IF NOT EXISTS `branch_table`
(
    `branch_id`         BIGINT       NOT NULL,
    `xid`               VARCHAR(128) NOT NULL,
    `transaction_id`    BIGINT,
    `resource_group_id` VARCHAR(32),
    `resource_id`       VARCHAR(256),
    `branch_type`       VARCHAR(8),
    `status`            TINYINT,
    `client_id`         VARCHAR(64),
    `application_data`  VARCHAR(2000),
    `gmt_create`        DATETIME(6),
    `gmt_modified`      DATETIME(6),
    PRIMARY KEY (`branch_id`),
    KEY `idx_xid` (`xid`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4;
 
-- the table to store lock data
CREATE TABLE IF NOT EXISTS `lock_table`
(
    `row_key`        VARCHAR(128) NOT NULL,
    `xid`            VARCHAR(128),
    `transaction_id` BIGINT,
    `branch_id`      BIGINT       NOT NULL,
    `resource_id`    VARCHAR(256),
    `table_name`     VARCHAR(32),
    `pk`             VARCHAR(36),
    `status`         TINYINT      NOT NULL DEFAULT '0' COMMENT '0:locked ,1:rollbacking',
    `gmt_create`     DATETIME,
    `gmt_modified`   DATETIME,
    PRIMARY KEY (`row_key`),
    KEY `idx_status` (`status`),
    KEY `idx_branch_id` (`branch_id`),
    KEY `idx_xid_and_branch_id` (`xid` , `branch_id`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4;
 
CREATE TABLE IF NOT EXISTS `distributed_lock`
(
    `lock_key`       CHAR(20) NOT NULL,
    `lock_value`     VARCHAR(20) NOT NULL,
    `expire`         BIGINT,
    primary key (`lock_key`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4;
 
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('AsyncCommitting', ' ', 0);
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('RetryCommitting', ' ', 0);
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('RetryRollbacking', ' ', 0);
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('TxTimeoutCheck', ' ', 0);

然后还需要再自己的微服务数据库中新创建一张数据表

CREATE TABLE `undo_log` (
  `branch_id` bigint(20) NOT NULL COMMENT 'branch transaction id',
  `xid` varchar(128) NOT NULL COMMENT 'global transaction id',
  `context` varchar(128) NOT NULL COMMENT 'undo_log context,such as serialization',
  `rollback_info` longblob NOT NULL COMMENT 'rollback info',
  `log_status` int(11) NOT NULL COMMENT '0:normal status,1:defense status',
  `log_created` datetime(6) NOT NULL COMMENT 'create datetime',
  `log_modified` datetime(6) NOT NULL COMMENT 'modify datetime',
  UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='AT transaction mode undo table';

然后在nacos中新增配置文件,将配置文件里面的mysql改成自己的就行

 

store.mode=db
store.lock.mode=db
store.session.mode=db

store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.cj.jdbc.Driver
store.db.url=jdbc:mysql://ip: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.distributedLockTable=distributed_lock
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000
 
service.vgroupMapping.demo_tx_group=default

然后就可以进行seata-server的启动了

进入seata目录里面的bin目录进行服务的启动

这里注意一点启动时候指定ip，否则注册到nacos的seata服务ip不是机器ip(会变成内网ip)
启动命令: sh seata-server.sh -h ip   （这里的 “ip” 改为机器ip即可）

到这里，seata就起来了，验证一下，看看自己的nacos里面有没有成功注册进seata-server 

 

到这seata-server的内容就完成了，然后就是微服务侧的配置了

在自己的微服务的配置文件中加入以下配置 （设计到的微服务都需要加上）
 

seata:
  enabled: true
  application-id: ${spring.application.name}
  tx-service-group: demo_tx_group
  service:
    vgroup-mapping:
      demo_tx_group: default
    grouplist:
      default: 127.0.0.1:8091  #这里是seata的ip 端口
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      group: SEATA_GROUP
      namespace: seata
      username: nacos
      password: nacos
      data-id: seataServer.properties

到这基本配置完成
但是， 有个非常坑的点，Springboot的数据连接池使用的是 Hikari，seata这时候不会自动回滚，但是也不报错，微服务的xid也没问题，微服务和seata都显示已经回滚，但是数据库一直没回滚；

这时候需要自己配置数据源

@Configuration
@Data
public class DataSourceConfig {
    @Value("${spring.datasource.url}")
    private String url;
    @Value("${spring.datasource.username}")
    private String userName;
    @Value("${spring.datasource.password}")
    private String password;
    @Value("${spring.datasource.driver-class-name}")
    private String driveClassName;
}

@Configuration
public class DataSourceProxyConfig {
    @Autowired
    private DataSourceConfig dataSourceConfig;

    @Bean("dataSource")
    public DataSource druidDataSource() {
        HikariDataSource hikariDataSource = new HikariDataSource();
        hikariDataSource.setJdbcUrl(dataSourceConfig.getUrl());
        hikariDataSource.setUsername(dataSourceConfig.getUserName());
        hikariDataSource.setPassword(dataSourceConfig.getPassword());
        hikariDataSource.setDriverClassName(dataSourceConfig.getDriveClassName());

        return hikariDataSource;
    }

    @Bean
    @Primary
    public DataSourceProxy dataSourceProxy(DataSource dataSource) {
        return new DataSourceProxy(dataSource);
    }
}

然后还需要再服务的启动类上上面，排除数据源自动配置
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)

到这就全部完事啦，可以尽情使用@GlobalTransactional(rollbackFor = Exception.class) 啦