分散式事務框架 Seata 入門案例

2022-11-02 18:03:42

1.  Seata Server 部署

Seata分TC、TM和RM三個角色,TC(Server端)為單獨伺服器端部署,TM和RM(Client端)由業務系統整合。

首先,下載最新的安裝包

也可以下載原始碼,然後本地編譯。最新的版本是1.5.2

下載後的啟動包(或者原始碼)中有個scripts目錄,裡面有各種我們所需的指令碼

Server端儲存模式(store.mode)現有file、db、redis三種:

  • file模式為單機模式,全域性事務對談資訊記憶體中讀寫並持久化本地檔案root.data,效能較高;(不推薦)
  • db模式為高可用模式,全域性事務對談資訊通過db共用,相應效能差些;
  • redis模式Seata-Server 1.3及以上版本支援,效能較高,存在事務資訊丟失風險,請提前設定合適當前場景的redis持久化設定;

修改組態檔

  • 啟動包:seata-->conf-->application.yml
  • 原始碼包:根目錄-->seata-server-->resources-->application.yml

主要修改的點是:

  • 修改store.mode="db或者redis"
  • 修改seata.config、seata.registry
  • 修改資料庫連線|redis屬性設定

在資源目錄還有一個application.example.yml檔案,application.example.yml中附帶額外設定,可以將其db|redis相關設定複製至application.yml,進行修改store.db或store.redis相關屬性。

如果不使用外部設定中心,直接使用本地檔案設定的話,那麼最簡單的設定可能是這樣的:

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

更多設定請參見 https://seata.io/zh-cn/docs/user/configurations.html

這裡面哪些是Server端需要設定的,哪些是Client端需要設定的,以及每個引數的含義都解釋得非常詳細,強烈建議看一下,這裡就不在贅述。

此處註冊中心用nacos

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

建表(預設資料庫是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 = '全域性事務表';

-- 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 = '分支事務表';

-- 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 = '全域性鎖表';

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);

如果採用AT模式,那麼每個業務資料庫還需建一個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';

啟動

  • 原始碼啟動: 執行ServerApplication.java的main方法
  • 命令啟動: seata-server.sh -h 127.0.0.1 -p 8091 -m db
    • -h: 註冊到註冊中心的ip
    • -p: Server rpc 監聽埠
    • -m: 全域性事務對談資訊儲存模式,file、db、redis,優先讀取啟動引數
    • -n: Server node,多個Server時,需區分各自節點,用於生成不同區間的transactionId,以免衝突
    • -e: 多環境設定參考 http://seata.io/en-us/docs/ops/multi-configuration-isolation.html 

2.  業務系統整合 Seata Client

步驟一:新增seata依賴(建議單選)

  • 依賴seata-all
  • 依賴seata-spring-boot-starter,支援yml、properties設定(.conf可刪除),內部已依賴seata-all
  • 依賴spring-cloud-alibaba-seata,內部整合了seata,並實現了xid傳遞

步驟二:undo_log建表、設定引數(僅AT模式)

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

步驟三:資料來源代理(不支援自動和手動設定並存)

1、如果使用seata-all

自動設定由註解@EnableAutoDataSourceProxy開啟,並可選擇jdk proxy或者cglib proxy。

如果採用XA模式,@EnableAutoDataSourceProxy(dataSourceProxyMode = "XA")

手動設定參考如下:

@Primary
@Bean("dataSource")
public DataSource dataSource(DataSource druidDataSource) {
    //AT 代理 二選一
    return new DataSourceProxy(druidDataSource);
    //XA 代理
    return new DataSourceProxyXA(druidDataSource)
}

2、如果使用seata-starter

預設就開啟了自動代理資料來源,無需額外設定

如果使用自動代理資料來源時,如果使用XA模式還需要調整組態檔application.yml

seata:
  data-source-proxy-mode: XA

如果想要關閉seata-spring-boot-starter的資料來源自動代理,可調整組態檔application.yml

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

步驟四:初始化GlobalTransactionScanner

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

手動

@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);
}

步驟五:業務使用

只需在業務方法上加上@GlobalTransactional 註解即可

3.  範例程式碼

此處用官網的那個案例,呼叫關係如圖:

首先,建庫建表,指令碼如下:

SQL指令碼
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','立白洗潔精',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:範例中使用的框架為 Spring Boot + Mybatis-Plus + Dubbo + Seata

雖然Seata最新版本是1.5.2,Dubbo最新版本為3.1.1,但這這兩個版本中二者不相容,可以降低其中一個的版本,比如

Seata 1.4.2 + Dubbo 3.1.1  或者  Seata 1.5.2 + Dubbo 2.7.18

本範例中採用的是 seata-spring-boot-starter 1.5.2 + dubbo 2.7.18

工程結構如圖

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,其它幾個類似不再重複:

<?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

核心程式碼如下

依次啟動這四個專案,Postman存取一下

通過斷點,觀察 global_table、lock_table、branch_table 等表資料的變化

剛開始,所有表中資料都是空的

執行到事務方法之後,global_table表中有了一條資料

當呼叫第一個遠端介面扣減庫存後,lock_table和branch_table表中都有了一條資料

同時,stock庫中undo_log表中也新增了一條資料

繼續往下執行,當呼叫第二個遠端介面建立訂單後,branch_table和lock_table中都新增了2條資料

account庫和order庫中的undo_log也有了資料

當事務方法執行完後,事務提交,上述表中此次事務相關資料清空

我們通過Seata Server的紀錄檔可以更清晰的看到事務從建立到提交的整個過程

正式正常事務成功的情況,有時候由於業務報錯了,或者事務超時了,或者其它的情況,事務會回滾

4.  設定中心

在此之前,範例中沒有使用設定中心,而是採用本地組態檔的方式。但實際開發過程中,建議還是採用設定中心,下面以nacos作為設定中心演示。

細心的同學會發現,微服務架構中有設定中心和註冊中心,Dubbo中也有設定中心和註冊中心,而本文講的Seata也有設定中心和註冊中心。那麼它們有什麼區別嗎?其實,並沒有區別,各是各的。微服務的設定中心和註冊中心你要設定,Dubbo的你也要設定,Seata的設定中心和註冊中心你還要設定,儘管它們可能是同一個範例,但那也得各配各的。

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

有兩種設定方式

方式一:放在某個名稱空間下,每一個設定項作為一行,即每一行一個DataId

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

在scripts/config-center目錄下有個config.txt,這個config.txt檔案中為我們準備好了各種設定項,我們按需修改裡面的內容即可,然後可以通過指令碼將config.txt中的內容匯入nacos,當然也可以一條一條手動在nacos中建立

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 指定名稱空間

範例中上傳到預設名稱空間下了

注意,config.txt中包含了Server端和Client端的設定,裡面註釋寫的也比較清楚哪些是Server端需要的設定,哪些是Client端的設定

匯入設定以後,現在修改Server端的設定,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: 

同時,每個業務系統裡面的設定也要修改一下

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

由於這裡匯入設定的時候沒有-t指定名稱空間,即匯入到預設名稱空間,所以設定裡面namespace為空,如果-t指定了特定的名稱空間,則server和client端的namespace也要與之對應

方式二:通過dataId設定

首先,需要在nacos新建設定,此處dataId為seataServer.properties

然後,將修改後的config.txt內容貼上進去,儲存修改並行布即可

修改Server和Client端seata.config設定

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

重啟Server和Client即可