wen 编程最新 2024-01-31

分布式事务框架 Seata 入门案例

1. Seata Server 部署

Seata分TC、TM和RM三个角色，TC（Server端）为单独服务端部署，TM和RM（Client端）由业务系统集成。

首先，下载最新的安装包

也可以下载源码，然后本地编译。最新的版本是1.5.2

下载后的启动包（或者源码）中有个scripts目录，里面有各种我们所需的脚本

Server端存储模式（store.mode）现有file、db、redis三种：

file模式为单机模式，全局事务会话信息内存中读写并持久化本地文件root.data，性能较高；（不推荐）
db模式为高可用模式，全局事务会话信息通过db共享，相应性能差些；
redis模式Seata-Server 1.3及以上版本支持,性能较高,存在事务信息丢失风险,请提前配置合适当前场景的redis持久化配置；

修改配置文件

启动包：seata–>conf–>application.yml
源码包：根目录–>seata-server–>resources–>application.yml

主要修改的点是：

修改store.mode=”db或者redis”
修改seata.config、seata.registry
修改数据库连接|redis属性配置

在资源目录还有一个application.example.yml文件，application.example.yml中附带额外配置，可以将其db|redis相关配置复制至application.yml，进行修改store.db或store.redis相关属性。

如果不使用外部配置中心，直接使用本地文件配置的话，那么最简单的配置可能是这样的：

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:
    type: file
  registry:
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      group: SEATA_GROUP
      namespace:
      cluster: default
  store:
    mode: db
    db:
      datasource: druid
      db-type: mysql
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://127.0.0.1:3306/seata?rewriteBatchedStatements=true&useUnicode=true&serverTimezone=Asia/Shanghai
      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
  security:
    secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
    tokenValidityInMilliseconds: 1800000
    ignore:
      urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-fe/public/**,/api/v1/auth/login

更多配置请参见 https://seata.io/zh-cn/docs/user/configurations.html

这里面哪些是Server端需要配置的，哪些是Client端需要配置的，以及每个参数的含义都解释得非常详细，强烈建议看一下，这里就不在赘述。

此处注册中心用nacos

https://nacos.io/zh-cn/index.html

建表（默认数据库是seata）

USE `seata`;
-- -------------------------------- 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 COMMENT = "全局事务表";

-- 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 COMMENT = "分支事务表";

-- 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 COMMENT = "全局锁表";

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);

如果采用AT模式，那么每个业务数据库还需建一个undo_log表

-- for AT mode you must to init this sql for you business database. the seata server not need it.
CREATE TABLE IF NOT EXISTS `undo_log`
(
    `branch_id`     BIGINT       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 AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8mb4 COMMENT ="AT transaction mode undo table";

启动

源码启动: 执行ServerApplication.java的main方法
命令启动: seata-server.sh -h 127.0.0.1 -p 8091 -m db
- -h: 注册到注册中心的ip
- -p: Server rpc 监听端口
- -m: 全局事务会话信息存储模式，file、db、redis，优先读取启动参数
- -n: Server node，多个Server时，需区分各自节点，用于生成不同区间的transactionId，以免冲突
- -e: 多环境配置参考 http://seata.io/en-us/docs/ops/multi-configuration-isolation.html

2. 业务系统集成 Seata Client

步骤一：添加seata依赖（建议单选）

依赖seata-all
依赖seata-spring-boot-starter，支持yml、properties配置(.conf可删除)，内部已依赖seata-all
依赖spring-cloud-alibaba-seata，内部集成了seata，并实现了xid传递

步骤二：undo_log建表、配置参数（仅AT模式）

https://seata.io/zh-cn/docs/user/configurations.html

步骤三：数据源代理（不支持自动和手动配置并存）

1、如果使用seata-all

自动配置由注解@EnableAutoDataSourceProxy开启，并可选择jdk proxy或者cglib proxy。

如果采用XA模式，@EnableAutoDataSourceProxy(dataSourceProxyMode = “XA”)

手动配置参考如下：

@Primary
@Bean("dataSource")
public DataSource dataSource(DataSource druidDataSource) {
    //AT 代理 二选一
    return new DataSourceProxy(druidDataSource);
    //XA 代理
    return new DataSourceProxyXA(druidDataSource)
}

2、如果使用seata-starter

默认就开启了自动代理数据源，无需额外配置

如果使用自动代理数据源时，如果使用XA模式还需要调整配置文件application.yml

seata:
  data-source-proxy-mode: XA

如果想要关闭seata-spring-boot-starter的数据源自动代理，可调整配置文件application.yml

seata:
  enable-auto-data-source-proxy: false

步骤四：初始化GlobalTransactionScanner

自动，引入seata-spring-boot-starter、spring-cloud-starter-alibaba-seata等jar即可

手动

@Bean
public GlobalTransactionScanner globalTransactionScanner() {
   String applicationName = this.applicationContext.getEnvironment().getProperty("spring.application.name");
   String txServiceGroup = this.seataProperties.getTxServiceGroup();
   if (StringUtils.isEmpty(txServiceGroup)) {
       txServiceGroup = applicationName + "-fescar-service-group";
       this.seataProperties.setTxServiceGroup(txServiceGroup);
   }

   return new GlobalTransactionScanner(applicationName, txServiceGroup);
}

步骤五：业务使用

只需在业务方法上加上@GlobalTransactional 注解即可

3. 示例代码

此处用官网的那个案例，调用关系如图：

首先，建库建表，脚本如下：

SQL脚本

CREATE DATABASE `account`;
USE `account`;
DROP TABLE IF EXISTS `t_account`;
CREATE TABLE `t_account` (
  `id` int NOT NULL AUTO_INCREMENT,
  `user_id` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `amount` double(14,2) DEFAULT "0.00",
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

INSERT INTO `t_account` VALUES (1,"1",79.90);

DROP TABLE IF EXISTS `undo_log`;
CREATE TABLE `undo_log` (
  `branch_id` bigint 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 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=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT="AT transaction mode undo table";


CREATE DATABASE `order`;
USE `order`;
DROP TABLE IF EXISTS `t_order`;
CREATE TABLE `t_order` (
  `id` int NOT NULL AUTO_INCREMENT,
  `order_no` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `user_id` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `commodity_code` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `count` int DEFAULT "0",
  `amount` double(14,2) DEFAULT "0.00",
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

DROP TABLE IF EXISTS `undo_log`;
CREATE TABLE `undo_log` (
  `branch_id` bigint 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 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=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT="AT transaction mode undo table";


CREATE DATABASE `stock`;
USE `stock`;
DROP TABLE IF EXISTS `t_stock`;
CREATE TABLE `t_stock` (
  `id` int NOT NULL AUTO_INCREMENT,
  `commodity_code` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `count` int DEFAULT "0",
  PRIMARY KEY (`id`),
  UNIQUE KEY `commodity_code` (`commodity_code`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

INSERT INTO `t_stock` VALUES (1,"A001","立白洗洁精",7);

DROP TABLE IF EXISTS `undo_log`;
CREATE TABLE `undo_log` (
  `branch_id` bigint 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 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=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT="AT transaction mode undo table";

注意版本：示例中使用的框架为 Spring Boot + Mybatis-Plus + Dubbo + Seata

虽然Seata最新版本是1.5.2，Dubbo最新版本为3.1.1，但这这两个版本中二者不兼容，可以降低其中一个的版本，比如

Seata 1.4.2 + Dubbo 3.1.1 或者 Seata 1.5.2 + Dubbo 2.7.18

本示例中采用的是 seata-spring-boot-starter 1.5.2 + dubbo 2.7.18

工程结构如图

父pom.xml如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.cjs.example</groupId>
    <artifactId>seata-spring-boot-starter-samples</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <name>seata-spring-boot-starter-samples</name>

    <modules>
        <module>samples-common-service</module>
        <module>samples-stock-service</module>
        <module>samples-order-service</module>
        <module>samples-account-service</module>
        <module>samples-business-service</module>
    </modules>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring-boot.version>2.7.5</spring-boot.version>
        <dubbo.version>2.7.18</dubbo.version>
        <seata.version>1.5.2</seata.version>
        <mybatis-plus.version>3.5.2</mybatis-plus.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-dependencies-bom</artifactId>
                <version>${dubbo.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            -->

            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-spring-boot-starter</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-registry-nacos</artifactId>
                <version>${dubbo.version}</version>
            </dependency>

            <dependency>
                <groupId>io.seata</groupId>
                <artifactId>seata-spring-boot-starter</artifactId>
                <version>${seata.version}</version>
            </dependency>

            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatis-plus.version}</version>
            </dependency>
        </dependencies>

    </dependencyManagement>
</project>

子pom.xml如下，其它几个类似不再重复：

<?xml version="1.0" encoding="UTF-8"?>
<project
    xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.cjs.example</groupId>
        <artifactId>seata-spring-boot-starter-samples</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>com.cjs.example</groupId>
    <artifactId>samples-order-service</artifactId>
    <version>${parent.version}</version>
    <name>samples-order-service</name>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>com.cjs.example</groupId>
            <artifactId>samples-common-service</artifactId>
            <version>${parent.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-nacos</artifactId>
        </dependency>
        <dependency>
            <groupId>io.seata</groupId>
            <artifactId>seata-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

application.yml

server:
  port: 8083
  servlet:
    context-path: /order
spring:
  application:
    name: samples-order-service
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/order?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
    username: root
    password: 123456
dubbo:
  protocol:
    name: dubbo
    port: 20883
  registry:
    address: nacos://127.0.0.1:8848
  config-center:
    address: nacos://127.0.0.1:8848
  metadata-report:
    address: nacos://127.0.0.1:8848
seata:
  enabled: true
  tx-service-group: my_test_tx_group
  service:
    vgroup-mapping:
      my_test_tx_group: default
  registry:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      cluster: default
      group: SEATA_GROUP

核心代码如下

依次启动这四个项目，Postman访问一下

通过断点，观察 global_table、lock_table、branch_table 等表数据的变化

刚开始，所有表中数据都是空的

执行到事务方法之后，global_table表中有了一条数据

当调用第一个远程接口扣减库存后，lock_table和branch_table表中都有了一条数据

同时，stock库中undo_log表中也新增了一条数据

继续往下执行，当调用第二个远程接口创建订单后，branch_table和lock_table中都新增了2条数据

account库和order库中的undo_log也有了数据

当事务方法执行完后，事务提交，上述表中此次事务相关数据清空

我们通过Seata Server的日志可以更清晰的看到事务从创建到提交的整个过程

正式正常事务成功的情况，有时候由于业务报错了，或者事务超时了，或者其它的情况，事务会回滚

4. 配置中心

在此之前，示例中没有使用配置中心，而是采用本地配置文件的方式。但实际开发过程中，建议还是采用配置中心，下面以nacos作为配置中心演示。

细心的同学会发现，微服务架构中有配置中心和注册中心，Dubbo中也有配置中心和注册中心，而本文讲的Seata也有配置中心和注册中心。那么它们有什么区别吗？其实，并没有区别，各是各的。微服务的配置中心和注册中心你要配置，Dubbo的你也要配置，Seata的配置中心和注册中心你还要配置，尽管它们可能是同一个实例，但那也得各配各的。

<dependency>
    <groupId>com.alibaba.nacos</groupId>
    <artifactId>nacos-client</artifactId>
    <version>2.1.1</version>
</dependency>

有两种配置方式

方式一：放在某个命名空间下，每一个配置项作为一行，即每一行一个DataId

https://github.com/seata/seata/tree/master/script/config-center

在scripts/config-center目录下有个config.txt，这个config.txt文件中为我们准备好了各种配置项，我们按需修改里面的内容即可，然后可以通过脚本将config.txt中的内容导入nacos，当然也可以一条一条手动在nacos中创建

例如：

sh ${SEATAPATH}/script/config-center/nacos/nacos-config.sh -h localhost -p 8848 -g SEATA_GROUP -t 5a3c7d6c-f497-4d68-a71a-2e5e3340b3ca -u username -w password

注意：-g 指定Group -t 指定命名空间

示例中上传到默认命名空间下了

注意，config.txt中包含了Server端和Client端的配置，里面注释写的也比较清楚哪些是Server端需要的配置，哪些是Client端的配置

导入配置以后，现在修改Server端的配置，seata–>conf–>application.yml中seata.config部分

seata:
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      group : "SEATA_GROUP"
      namespace: 
      username: 
      password:

同时，每个业务系统里面的配置也要修改一下

seata:
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      group : "SEATA_GROUP"
      namespace:
      username: 
      password:

由于这里导入配置的时候没有-t指定命名空间，即导入到默认命名空间，所以配置里面namespace为空，如果-t指定了特定的命名空间，则server和client端的namespace也要与之对应

方式二：通过dataId配置

首先，需要在nacos新建配置，此处dataId为seataServer.properties

然后，将修改后的config.txt内容粘贴进去，保存修改并发布即可

修改Server和Client端seata.config配置

seata:
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      group: "SEATA_GROUP"
      namespace: 
      dataId: "seataServer.properties"
      username: 
      password:

重启Server和Client即可

hmoban主题是根据ripro二开的主题，极致后台体验，无插件，集成会员系统
自学咖网 » 分布式事务框架 Seata 入门案例

wen 普通

分享到：

wen 普通

相关推荐