Seata Server搭建和配置

秒速五厘米 2022-11-26 09:49 161阅读 0赞

# Seata Server搭建和配置 #

## 前言 ##

在之前的博客中溪源我已经针对`Nacos`的搭建流程进行了简单总结，本篇博客将带领大家搭建`Seata Server`。

**Nacos的相关知识**可参考我的博客：[Nacos服务治理中心和配置中心][Nacos]

**Seata实现分布式事务**可参考我的博客：[Seata实现分布式事务][Seata]

## 正文 ##

## Seata Server搭建和配置 ##

**第一步：下载安装服务端,并解压到指定位置**

unzip  seata-server-1.1.0.zip

**seata的目录结构：**

*  **bin**:存放各系统的启动脚本
 *  **conf**:存放`seata server`启动时所需要配置信息、数据库模式下所需要的建表语句
 *  **lib**:运行`seata server`所需要的的依赖包

**第二步：配置seata**

**seata的配置文件（conf目录下）**

*  **file.conf**: 该文件用于配置存储方式、透传事务信息的`NIO`等信息，默认对应`registry.conf`中`file`配置方式
 *  **registry.conf**:`seata server`核心配置文件，可以通过该文件配置服务注册方式、配置读取方式。

注册方式目前支持`file、nacos、eureka、redis、zk、consul、etcd3、sofa`等方式，默认为`file`,对应读取`file.conf`内的注册方式信息。

读取配置信息的方式支持`file、nacos、apollo、zk、consul、etcd3`等方式，默认为`file`，对应读取`file.conf`文件内的配置。

**修改registry.conf**

*  注册中心使用`Nacos`
 *  配置中心使用`file`进行配置

**注册中心配置，用于TC,TM,RM的相互服务发现**

registry { 
      # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
      type = "nacos"
      consul { 
        cluster = "seata"
        serverAddr = "127.0.0.1:8848"
      }
    }

**配置中心配置，用于读取TC的相关配置**

config { 
      # file、nacos 、apollo、zk、consul、etcd3
      type = "file"
      file { 
        name = "file.conf"
      }
    }

**修改file.conf，配置中心配置，用于读取TC的相关配置**

store { 
      ## store mode: file?.b
      mode = "file"
    
      ## file store property
      file { 
        ## store location dir
        dir = "sessionStore"
        # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
        maxBranchSessionSize = 16384
        # globe session size , if exceeded throws exceptions
        maxGlobalSessionSize = 512
        # file buffer size , if exceeded allocate new buffer
        fileWriteBufferCacheSize = 16384
        # when recover batch read size
        sessionReloadReadSize = 100
        # async, sync
        flushDiskMode = async
      }
    
    
      ## database store property
      db { 
        ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
        datasource = "dbcp"
        ## mysql/oracle/h2/oceanbase etc.
        dbType = "mysql"
        driverClassName = "com.mysql.jdbc.Driver"
        url = "jdbc:mysql://127.0.0.1:3306/seata"
        registry.confuser = "mysql"
        password = "mysql"
        minConn = 1
        maxConn = 10
        globalTable = "global_table"
        branchTable = "branch_table"
        lockTable = "lock_table"
        queryLimit = 100
      }
    }

**第三步：创建seata数据库、以及所需的三张表**

*  **global\_table**: 存储全局事务`session`数据的表
 *  **branch\_table**:存储分支事务`session`数据的表
 *  **lockTable**:存储分布式锁数据的表

-- -------------------------------- 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_gmt_modified_status` (`gmt_modified`, `status`),
        KEY `idx_transaction_id` (`transaction_id`)
    ) ENGINE = InnoDB
      DEFAULT CHARSET = utf8;
    -- 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,
        `gmt_modified`      DATETIME,
        PRIMARY KEY (`branch_id`),
        KEY `idx_xid` (`xid`)
    ) ENGINE = InnoDB
      DEFAULT CHARSET = utf8;
    -- the table to store lock data
    CREATE TABLE IF NOT EXISTS `lock_table`
    (
        `row_key`        VARCHAR(128) NOT NULL,
        `xid`            VARCHAR(96),
        `transaction_id` BIGINT,
        `branch_id`      BIGINT       NOT NULL,
        `resource_id`    VARCHAR(256),
        `table_name`     VARCHAR(32),
        `pk`             VARCHAR(36),
        `gmt_create`     DATETIME,
        `gmt_modified`   DATETIME,
        PRIMARY KEY (`row_key`),
        KEY `idx_branch_id` (`branch_id`)
    ) ENGINE = InnoDB
      DEFAULT CHARSET = utf8;

**第四步：启动seata server**

sh seata-server.sh -p 8091 -h 0.0.0.0 -m file 
    
    Options: 
    
    --host, -h 
    The host to bind. 
    Default: 0.0.0.0 
    
    --port, -p 
    The port to listen. 
    Default: 8091 
    
    --storeMode, -m log store mode : file、db 
    Default: file 
    
    --help

补充：

*  **外网访问**：如果需要外网访问 需要将`0.0.0.0`转成外网IP
 *  **后台启动**： `nohup sh seata-server.sh -p 8091 -h 127.0.0.1 -m file > catalina.out 2>&1 &`

## 在nacos中看到seata的注册信息 ##

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[Nacos]: https://blog.csdn.net/weixin_40990818/article/details/107666116
[Seata]: https://xiyuan.blog.csdn.net/article/details/107730189
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