Spring Cloud实战 | 第十一篇 ：Spring Cloud + Nacos整合Seata 1.4.1最新版本实现微服务架构中的分布式事务

1、环境准备

1.1 Nacos安装和配置

查看《nacos安装》文章

配置命名空间ID自定义为seata_namespace_id，后面需要

1.2 Seata数据库创建

创建数据库名为seata，执行Seata的Github官方源码中提供的MySQL数据库脚本 MySQL脚本地址：
https://github.com/seata/seata/blob/1.4.1/script/server/db/mysql.sql

-- -------------------------------- 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(6),
    `gmt_modified`      DATETIME(6),
    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;

二. seata-server安装

查看最新Seata版本 查看地址：
https://registry.hub.docker.com/r/seataio/seata-server/tags?page=1&ordering=last_updated

1、这里使用版本为1.4.1版本，复制指令获取版本镜像

docker pull seataio/seata-server:1.4.1

2、启动临时容器

docker run -d --name seata -p 8091:8091 seataio/seata-server:1.4.1

3、从临时容器获取到 registry.conf 配置文件

mkdir /home/docker-compose/seata
docker cp seata:/seata-server/resources/registry.conf  /home/docker-compose/seata

4、修改registry.conf配置,类型选择nacos，namesapce为上文中在nacos新建的命名空间id即seata_namespace_id，精简如下：

registry {
  type = "nacos"
  loadBalance = "RandomLoadBalance"
  loadBalanceVirtualNodes = 10

  nacos {
    application = "seata-server"
    serverAddr = "192.168.147.129:8848"
    group = "SEATA_GROUP"
    namespace = "seata_namespace_id"
    cluster = "default"
    username = "nacos"
    password = "nacos"
  }
}

config {
  type = "nacos"

  nacos {
    serverAddr = "192.168.147.129:8848"
    namespace = "seata_namespace_id"
    group = "SEATA_GROUP"
    username = "nacos"
    password = "nacos"
  }
}

5、 安排好 registry.conf 之后，删除临时容器

docker rm -f seata

6、 Nacos配置Seata所需配置

获取 config.txt 即所有配置信息。 链接
:https://github.com/seata/seata/blob/develop/script/config-center/config.txt

transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.enableTmClientBatchSendRequest=false
transport.enableRmClientBatchSendRequest=true
transport.rpcRmRequestTimeout=5000
transport.rpcTmRequestTimeout=10000
transport.rpcTcRequestTimeout=10000
transport.threadFactory.bossThreadPrefix=NettyBoss
transport.threadFactory.workerThreadPrefix=NettyServerNIOWorker
transport.threadFactory.serverExecutorThreadPrefix=NettyServerBizHandler
transport.threadFactory.shareBossWorker=false
transport.threadFactory.clientSelectorThreadPrefix=NettyClientSelector
transport.threadFactory.clientSelectorThreadSize=1
transport.threadFactory.clientWorkerThreadPrefix=NettyClientWorkerThread
transport.threadFactory.bossThreadSize=1
transport.threadFactory.workerThreadSize=default
transport.shutdown.wait=3
service.vgroupMapping.default_tx_group=default
service.default.grouplist=127.0.0.1:8091
service.enableDegrade=false
service.disableGlobalTransaction=false
client.rm.asyncCommitBufferLimit=10000
client.rm.lock.retryInterval=10
client.rm.lock.retryTimes=30
client.rm.lock.retryPolicyBranchRollbackOnConflict=true
client.rm.reportRetryCount=5
client.rm.tableMetaCheckEnable=false
client.rm.tableMetaCheckerInterval=60000
client.rm.sqlParserType=druid
client.rm.reportSuccessEnable=false
client.rm.sagaBranchRegisterEnable=false
client.rm.sagaJsonParser=fastjson
client.rm.tccActionInterceptorOrder=-2147482648
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.defaultGlobalTransactionTimeout=60000
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000
client.tm.interceptorOrder=-2147482648
store.mode=file
store.lock.mode=file
store.session.mode=file
store.publicKey=
store.file.dir=file_store/data
store.file.maxBranchSessionSize=16384
store.file.maxGlobalSessionSize=512
store.file.fileWriteBufferCacheSize=16384
store.file.flushDiskMode=async
store.file.sessionReloadReadSize=100
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&rewriteBatchedStatements=true
store.db.user=username
store.db.password=password
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.distributedLockTable=distributed_lock
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000
store.redis.mode=single
store.redis.single.host=127.0.0.1
store.redis.single.port=6379
store.redis.sentinel.masterName=
store.redis.sentinel.sentinelHosts=
store.redis.maxConn=10
store.redis.minConn=1
store.redis.maxTotal=100
store.redis.database=0
store.redis.password=
store.redis.queryLimit=100
server.recovery.committingRetryPeriod=1000
server.recovery.asynCommittingRetryPeriod=1000
server.recovery.rollbackingRetryPeriod=1000
server.recovery.timeoutRetryPeriod=1000
server.maxCommitRetryTimeout=-1
server.maxRollbackRetryTimeout=-1
server.rollbackRetryTimeoutUnlockEnable=false
server.distributedLockExpireTime=10000
client.undo.dataValidation=true
client.undo.logSerialization=jackson
client.undo.onlyCareUpdateColumns=true
server.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000
client.undo.logTable=undo_log
client.undo.compress.enable=true
client.undo.compress.type=zip
client.undo.compress.threshold=64k
log.exceptionRate=100
transport.serialization=seata
transport.compressor=none
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898
tcc.fence.logTableName=tcc_fence_log
tcc.fence.cleanPeriod=1h

修改部分配置

service.vgroupMapping.mall_tx_group=default

store.mode=db
store.db.driverClassName=com.mysql.cj.jdbc.Driver
store.db.url=jdbc:mysql://192.168.1.188:3306/seata?useUnicode=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=root

获取配置推送脚本nacos-config.sh 地址链接：
https://github.com/seata/seata/blob/develop/script/config-center/nacos/nacos-config.sh

#!/bin/sh
# Copyright 1999-2019 Seata.io Group.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at、
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


while getopts ":h:p:g:t:u:w:" opt
do
  case $opt in
  h)
    host=$OPTARG
    ;;
  p)
    port=$OPTARG
    ;;
  g)
    group=$OPTARG
    ;;
  t)
    tenant=$OPTARG
    ;;
  u)
    username=$OPTARG
    ;;
  w)
    password=$OPTARG
    ;;
  ?)
    echo " USAGE OPTION: $0 [-h host] [-p port] [-g group] [-t tenant] [-u username] [-w password] "
    exit 1
    ;;
  esac
done


if [ -z ${host} ]; then
    host=localhost
fi
if [ -z ${port} ]; then
    port=8848
fi
if [ -z ${group} ]; then
    group="SEATA_GROUP"
fi
if [ -z ${tenant} ]; then
    tenant=""
fi
if [ -z ${username} ]; then
    username=""
fi
if [ -z ${password} ]; then
    password=""
fi


nacosAddr=$host:$port
contentType="content-type:application/json;charset=UTF-8"


echo "set nacosAddr=$nacosAddr"
echo "set group=$group"


urlencode() {
  length="${#1}"
  i=0
  while [ $length -gt $i ]; do
    char="${1:$i:1}"
    case $char in
    [a-zA-Z0-9.~_-]) printf $char ;;
    *) printf '%%%02X' "'$char" ;;
    esac
    i=`expr $i + 1`
  done
}


failCount=0
tempLog=$(mktemp -u)
function addConfig() {
  dataId=`urlencode $1`
  content=`urlencode $2`
  curl -X POST -H "${contentType}" "http://$nacosAddr/nacos/v1/cs/configs?dataId=$dataId&group=$group&content=$content&tenant=$tenant&username=$username&password=$password" >"${tempLog}" 2>/dev/null
  if [ -z $(cat "${tempLog}") ]; then
    echo " Please check the cluster status. "
    exit 1
  fi
  if [ "$(cat "${tempLog}")" == "true" ]; then
    echo "Set $1=$2 successfully "
  else
    echo "Set $1=$2 failure "
    failCount=`expr $failCount + 1`
  fi
}


count=0
for line in $(cat $(dirname "$PWD")/config.txt | sed s/[[:space:]]//g); do
    count=`expr $count + 1`
    key=${line%%=*}
    value=${line#*=}
    addConfig "${key}" "${value}"
done


echo "========================================================================="
echo " Complete initialization parameters,  total-count:$count ,  failure-count:$failCount "
echo "========================================================================="


if [ ${failCount} -eq 0 ]; then
    echo " Init nacos config finished, please start seata-server. "
else
    echo " init nacos config fail. "
fi

如果config.txt 和nacos-config.sh放在同一目录下，需要修改下图路径：

修改完成后执行推送命令

bash nacos-config.sh -h 192.168.147.129 -p 8848 -g SEATA_GROUP -t seata_namespace_id -u nacos -w nacos

登录nacos查看

7、 做完上述准备工作之后，接下来最后一步:启动Seata容器

docker run -d --name seata --restart=always -p 8091:8091  \
-e SEATA_IP=192.168.147.129 \
-e SEATA_CONFIG_NAME=file:/seata-server/resources/registry.conf \
-v /home/docker-compose/seata/registry.conf:/seata-server/resources/registry.conf \
-v /home/docker-compose/seata/logs:/root/logs \
seataio/seata-server:1.4.1

三. Seata客户端

1. 添加undo_log表

Seata官方Github源码库undo_log表脚本地址：
https://github.com/seata/seata/blob/1.4.1/script/client/at/db/mysql.sql

-- for AT mode you must to init this sql for you business database. the seata server not need it.
CREATE TABLE IF NOT EXISTS `undo_log`
(
    `branch_id`     BIGINT(20)   NOT NULL COMMENT 'branch transaction id',
    `xid`           VARCHAR(100) NOT NULL COMMENT 'global transaction id',
    `context`       VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization',
    `rollback_info` LONGBLOB     NOT NULL COMMENT 'rollback info',
    `log_status`    INT(11)      NOT NULL COMMENT '0:normal status,1:defense status',
    `log_created`   DATETIME(6)  NOT NULL COMMENT 'create datetime',
    `log_modified`  DATETIME(6)  NOT NULL COMMENT 'modify datetime',
    UNIQUE KEY `ux_undo_log` (`xid`, `branch_id`)
) ENGINE = InnoDB
  AUTO_INCREMENT = 1
  DEFAULT CHARSET = utf8 COMMENT ='AT transaction mode undo table';

别在项目的涉及到的数据库执行脚本创建 undo_log 表

2. 添加依赖

    com.alibaba.cloud
    spring-cloud-starter-alibaba-seata
    
        
        
            io.seata
            seata-all
        
        
            io.seata
            seata-spring-boot-starter
        
    


    io.seata
    seata-all
    1.4.1


    io.seata
    seata-spring-boot-starter
    1.4.1

3、添加yml配置

# 分布式事务配置
seata:
  tx-service-group: mall_tx_group
  enable-auto-data-source-proxy: true
  registry:
    type: nacos
    nacos:
      server-addr: 192.168.147.129:8848
      namespace: seata_namespace_id
      group: SEATA_GROUP
  config:
    type: nacos
    nacos:
      server-addr: 192.168.147.129:8848
      namespace: seata_namespace_id
      group: SEATA_GROUP

4、启动服务前配置 VM参数

-Dproject.name="orderMallServer"

有订阅者服务说明配置成功。

5、order，member，product三个项目各自实现测试代码和数据库

具体代码见gitee 标签 0.0.1的代码
https://gitee.com/good_luck_sir/microservice-learning/repository/archive/0.0.1

6、可先看第7步，有问题在看这一步操作。添加kryo依赖，解决seata1.4.1序列化问题（修改nacos配置client.undo.logSerialization的值为kryo）

    com.esotericsoftware
    kryo
    4.0.2


    de.javakaffee
    kryo-serializers
    0.44

6、使用postman测试

body内容如下，根据具体情况修改部分内容后测试。

{
    "buyProductVOList": [{
        "productId":1,
        "productPrice":122222,
        "count":1
    }],
    "point":30,
    "id":1,
    "orderSn":"20211227000031",
    "totalAmount":12.00,
    "totalQuantity":1,
    "sourceType":1,
    "status":101,
    "remark":"测试",
    "memberId":1,
    "couponId":null,
    "couponAmount":0.00,
    "freightAmount":0.00,
    "payAmount":1000.00,
    "payTime":{{startTime}},
    "payType":1,
    "deliveryTime":{{startTime}},
    "receiveTime":{{startTime}},
    "commentTime":{{startTime}},
    "deleted":0,
    "createTime":{{startTime}},
    "updateTime":{{startTime}}
}

可以设定失败，查看是否事务会回滚。

查看seata日志、和数据库数据。