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

   接下来直接上手，Docker安装部署Seata。

2、下载镜像

docker pull seataio/seata-server:1.4.2

3、启动容器

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

4、拷贝文件

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。

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 = ""
    cluster = "default"
    username = "nacos"
    password = "nacos"
  }

......

config {
  # file、nacos 、apollo、zk、consul、etcd3
  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。

## transaction log store, only used in seata-server
store {
  ## store mode: file、db、redis
  mode = "db"
  
  ......

  ## 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://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

docker stop seata-server
docker rm seata-server

7、启动新容器

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