docker安裝seata，集成到cloud項目

環境配置

• win10系統配置seata環境

• docker中配置seata環境

• 虛擬機中安裝centos8，centos8中安裝docker，docker中安裝mysql8.0.27、nacos2.0.3、seata1.3.0

• 啟動mysql容器，win10系統上navicat能連接到mysql容器，並導入如下數據庫

• 

• 可在win10系統上下創建2個文件，之后上傳到centos8服務器的/home/mydocker/seata/config目錄

• nacos控制台中新建命名空間dev

## file.conf；使seata-server連接mysql中的數據庫seata
store {
  ## store mode: file、db
  mode = "db"
  ## database store property
  db {
    ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
    datasource = "druid"
    ## mysql/oracle/postgresql/h2/oceanbase etc.
    dbType = "mysql"
    driverClassName = "com.mysql.cj.jdbc.Driver"
    url = "jdbc:mysql://192.168.96.172:3306/seata"
    user = "root"
    password = "123456"
    minConn = 5
    maxConn = 30
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
  }
}

## testregistry.conf；使nacos作為seata-server的服務注冊中心和服務配置中心
registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"
  loadBalance = "RandomLoadBalance"
  loadBalanceVirtualNodes = 10
  nacos {
    application = "seata-server"
    serverAddr = "192.168.96.172:8848"
    group = "SEATA_GROUP"
    namespace = "3ac15cbc-5ad3-4441-b5d5-a6fb1aa8a7f7"
    cluster = "default"
    username = ""
    password = ""
  }
}
config {
  # file、nacos 、apollo、zk、consul、etcd3
  type = "nacos"
  nacos {
    serverAddr = "192.168.96.172:8848"
    namespace = "3ac15cbc-5ad3-4441-b5d5-a6fb1aa8a7f7"
    group = "SEATA_GROUP"
    username = ""
    password = ""
  }
}

• 上傳到centos8服務器

pscp -P 22 C:\file.conf root@192.168.96.172:/home/mydocker/seata/config
pscp -P 22 C:\testregistry.conf root@192.168.96.172:/home/mydocker/seata/config

• 啟動nacos，同時啟動seata

docker run --name seata-server -p 8091:8091 -e SEATA_CONFIG_NAME=file:/root/seata-config/testregistry -e SEATA_IP=192.168.96.172 -v /home/mydocker/seata/config:/root/seata-config -d seataio/seata-server:1.3.0

• win10系統上打開瀏覽器，輸入 http://192.168.96.172:8848/nacos/ 打開nacos控制台，可在服務列表查看注冊進來的seata服務
  

• mkdir -p /home/mydocker/seata # 新建文件夾

• touch config.txt # 新建文件，復制官方配置到該文件

• config.txt中配置分組、數據源

service.vgroupMapping.my_test_tx_group=default
service.vgroupMapping.account-service-seata=default
service.vgroupMapping.storage-service-seata=default
service.default.grouplist=192.168.96.172:8091

store.mode=db
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.cj.jdbc.Driver
store.db.url=jdbc:mysql://192.168.96.172:3306/seata?useUnicode=true
store.db.user=root
store.db.password=123456

• mkdir -p /home/mydocker/seata/nacos # 新建文件夾

• touch nacos-config.sh # 新建文件，復制官方配置到該文件
  官方配置地址

• 進入nacos-config.sh所在路徑，執行如下命令

sh nacos-config.sh -h 192.168.43.150 -p 8848 -g SEATA_GROUP -t 命名空間id -u nacos -w nacos

• 導入成功后可在nacos控制台配置列表查看

• config.txt導入nacos配置管理后，就可以不將file.conf和registry.conf放到我們的項目中

項目配置

• 父工程依賴

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
    <version>${spring-cloud-alibaba.version}</version>
    <type>pom</type>
    <scope>import</scope>
</dependency>

• 3個子模塊中添加依賴，pom中導入對應的seata依賴版本

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-alibaba-seata</artifactId>
    <version>2.1.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>io.seata</groupId>
    <artifactId>seata-all</artifactId>
    <version>1.3.0</version>
</dependency>

• 3個子模塊中配置yml

spring:
  cloud:
    alibaba:
      seata:
        enabled: true
        application-id: seata-server         # nacos中seata服務端的注冊名稱
        enable-auto-data-source-proxy: true            # 開啟數據庫自動代理
        tx-service-group: my_test_tx_group            # 這里填寫上傳config.txt時對應此工程的vgroupMapping配置  

• 3個子模塊中啟動類配置

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)

• 3個子模塊中添加registry.conf文件

registry {
  type = "nacos"
  nacos {
    serverAddr = "192.168.96.172:8848"
    namespace = "3ac15cbc-5ad3-4441-b5d5-a6fb1aa8a7f7"
    cluster = "default"
    group = "SEATA_GROUP"
  }
}
config {
  type = "nacos"
  nacos {
    serverAddr = "192.168.96.172:8848"
    namespace = "3ac15cbc-5ad3-4441-b5d5-a6fb1aa8a7f7"
    cluster = "default"
    group = "SEATA_GROUP"
  }
}

• 3個子模塊中編寫DataSourceConfig配置類

# yml文件中指定數據源
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://192.168.96.172:3306/seata_order?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
    username: root
    password: 123456

# 編寫配置類
@Configuration
public class DataSourceConfig {
    // 1. 綁定yml中的數據源
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource() {
        return new DruidDataSource();
    }
    // 2. 構建datasource代理對象，替換原來的數據源
    @Bean
    public DataSourceProxy dataSourceProxy(DataSource dataSource) {
        return new DataSourceProxy(dataSource);
    }
    // 3. mybatis相關配置
    @Bean
    public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSourceProxy);
        sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
        return sqlSessionFactoryBean.getObject();
    }
}

• 方法上添加注解 @GlobalTransactional(rollbackFor = Exception.class)

• 模擬1個超時異常，瀏覽器發送請求進行測試；測試結果，數據庫數據數據無誤

• 注釋掉注解@GlobalTransactional，再次發送請求進行測試

• 測試結果：余額減100

• 

• 庫存減10

• 

• 生成了1張訂單，但訂單狀態為0表示用戶未支付，可用戶的余額表顯示減了100；說明出現錯誤后數據沒有回滾

• 

• cloud集成seata

• 參考

————————————————————————— 分割線 ———————————————————————————

0. 參考

1. 引入依賴；首先排除spring-cloud-starter-alibaba-seata中的seata-all

2. 

3. 每個微服務對應的數據庫加入undo_log表

4. 編寫配置代理數據類DataSourceConfig

5. 啟動類上排除DataSourceAutoConfiguration類

6. 每個微服務resources路徑下添加registry.conf文件；注意命名空間和分組

7. 

8. 補充：使用cloud alibaba2.1.4則可不添加registry.conf，將該文件中配置添加到yml文件中

9. 

10. 每個微服務的yml中指定分組

11. 

12. 添加注解@GlobalTransactional

常見錯誤

• error1：no available server to connect

# 解決方案
# yml配置中添加屬性spring.cloud.alibaba.seata.tx-service-group，值需與file.conf中的分組一致
spring:
  cloud:
    alibaba:
      seata:
        #自定義事務組名稱需要與seata-server中的對應
        tx-service-group: my_test_tx_group 

• win10系統中安裝seata0.9，file.conf中service模塊設置分組service.vgroupMapping；docker中安裝seata1.3.0發現無service模塊，不在file.conf中配置分組，而在config.txt中配置

• pom中到seata依賴版本與安裝的seata版本需要一致

• 若使用seata1.4.0，則對應使用cloud alibaba2.1.1

• 

• 若使用seata1.3.0，則對應使用cloud alibaba2.1.2及其以上版本

• 

• resources路徑下的conf后綴結尾的文件圖標必須如下，否則表示沒有被識別

• 

• 

• 參考