SpringCloud集成Seata配置

1.1 安装配置Seata服务端

在Seata服务端下载页面提供了服务端的压缩包，也可以直接通过命令来下载seata-server-1.4.2

wget https://github.com/seata/seata/releases/download/v1.4.2/seata-server-1.4.2.tar.gz

压缩包解压后的目录如下：

[root@lizhi seata-server-1.4.2]# ll
total 24
drwxr-xr-x 3 root root     90 Feb 14 17:57 bin
drwxr-xr-x 4  502 games   156 Feb 14 17:57 conf
drwxr-xr-x 3  502 games  8192 Feb 14 13:35 lib
-rw-r--r-- 1  502 games 11365 May 13  2019 LICENSE
drwxr-xr-x 2  502 games   136 Feb 14 17:58 logs

进入到conf/目录中，修改配置文件

-rw-r--r-- 1 502 games 1859 Feb 14 13:27 file.conf
-rw-r--r-- 1 502 games 3112 Apr 25  2021 file.conf.example
drwxr-xr-x 2 502 games  114 Feb 14 10:50 logback
-rw-r--r-- 1 502 games 2222 Apr 25  2021 logback.xml
drwxr-xr-x 3 502 games   22 Apr 25  2021 META-INF
-rw-r--r-- 1 502 games 1324 Apr 25  2021 README.md
-rw-r--r-- 1 502 games 1327 Apr 25  2021 README-zh.md
-rw-r--r-- 1 502 games 1976 Feb 14 17:57 registry.conf

修改registry.conf文件，配置nacos作为注册中心和配置中心

# 注册中心
registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"

  nacos {
    application = "seata-server"
    serverAddr = "127.0.0.1:8848"
    group = "SEATA_GROUP"
    namespace = "24712b7c-05ad-4b79-af97-1d202431f521"
    cluster = "default"
    username = ""
    password = ""
  }
}

# 配置中心
config {
  # file、nacos 、apollo、zk、consul、etcd3
  type = "nacos"

  nacos {
    serverAddr = "127.0.0.1:8848"
    namespace = ""
    group = "SEATA_GROUP"
    username = ""
    password = ""
    dataId = "seataServer.properties"
  }
}

除了配置注册中心和配置中心外，还需要配置数据存储方式，修改file.conf文件，将存储模式改为db，并修改数据库的连接信息

store {
  ## store mode: file、db、redis
  mode = "db"
  ## rsa decryption public key
  publicKey = ""

  ## database store property
  db {
    ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp)/HikariDataSource(hikari) etc.
    datasource = "druid"
    ## mysql/oracle/postgresql/h2/oceanbase etc.
    dbType = "mysql"
    driverClassName = "com.mysql.cj.jdbc.Driver"
    ## if using mysql to store the data, recommend add rewriteBatchedStatements=true in jdbc connection param
    url = "jdbc:mysql://127.0.0.1:3306/seata?rewriteBatchedStatements=true"
    user = "root"
    password = "lz123"
    minConn = 5
    maxConn = 100
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }

注意：如果使用的是MySQL8.0以上，需要将数据库驱动类的名称改为com.mysql.cj.jdbc.Driver，并在lib目录中下载mysql-connector-java-8.0.27.jar

wget https://repo1.maven.org/maven2/mysql/mysql-connector-java/8.0.27/mysql-connector-java-8.0.27.jar

1.2 配置初始化参数

方法一：

在较低的版本中，seata-server解压完之后，在conf目录下还有一个config.txt文件，里面记录了Seata启动时必须的初始化参数，但seata-server-1.4.2中并没有这个文件

我们可以在https://github.com/seata/seata/tree/develop/script/config-center中看到这个配置文件，下载这个配置，修改里面的参数

如果配置了Nacos作为配置中心，然后再下载https://github.com/seata/seata/tree/develop/script/config-center/nacos中的nacos-config.sh，然后执行脚本，将config.txt中的初始化参数加载到nacos的配置中心

https://github.com/seata/seata/tree/develop/script/config-center下面，为每种配置中心的启动脚本都有详细的参数介绍