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> Docker 安装 Seata 分布式事务

1、简介
----

   之前已经对分布式事务 Seata 做了详细介绍，可参考：  
   [分布式事务解决方案：Spring Cloud + Nacos + Seata 整合](https://yunfan.blog.csdn.net/article/details/123140907)

   接下来直接上手，Docker 安装部署 Seata。

2、下载镜像
------

```shell
docker pull seataio/seata-server:1.4.2

```

3、启动容器
------

```shell
docker run -d --name seata-server -p 8091:8091 seataio/seata-server:1.4.2

```

4、拷贝文件
------

```shell
docker cp seata-server:/seata-server  /docker-data/seata

```

5、修改配置文件
--------

（1）修改配置文件 / docker-data/seata/resources/registry.conf，改为 Nacos 信息。

```shell
registry {
  
  type = "nacos"

  nacos {
    application = "seata-server"
    serverAddr = "127.0.0.1:8848"
    group = "SEATA_GROUP"
    namespace = ""
    cluster = "default"
    username = "nacos"
    password = "nacos"
  }

......

config {
  
  type = "nacos"

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

```

（2）修改配置文件 / docker-data/seata/resources/file.conf，改为 DB 信息。

```shell
store {
  
  mode = "db"
  
  ......

  
  db {
    
    datasource = "druid"
    
    dbType = "mysql"
    driverClassName = "com.mysql.cj.jdbc.Driver"
    
    url = "jdbc:mysql://localhost:3306/seata?rewriteBatchedStatements=true"
    user = "root"
    password = "root"
    minConn = 5
    maxConn = 100
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }
  ......
}

```

6、停掉旧容器
-------

```shell
docker stop seata-server
docker rm seata-server

```

7、启动新容器
-------

```shell
docker run -d \
--restart always \
--name seata-server \
-p 8091:8091 \
-v /docker-data/seata:/seata-server \
-e SEATA_IP=外网IP \
-e SEATA_PORT=8091 \
seataio/seata-server:1.4.2

```

**注意：** 遇到的坑，如果是部署云服务器，没有设置 SEATA_IP，默认注册的是 docker 的内网 ip，seata 启动虽然没有问题，但是微服务项目启动连接时，会报错 can not register RM,err:can not connect to services-server.

8、查看 Nacos 注册情况
---------------

![](assets/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA56iL5bqP5ZGY5LqR5biG5ZOl,size_20,color_FFFFFF,t_70,g_se,x_16-16724774944563.png)