1.简介

本文主要介绍SpringBoot2.0.4 + Nacos 1.2.1 +Windows版本的Seata0.9.0整合使用Nacos 作为注册中心和配置中心,使用 MySQL 数据库和 MyBatis来操作数据。

2.环境准备

2.1 下载nacos并安装启动

nacos的Docker安装命令:

docker pull nacos/nacos-server:1.2.1

安装命令执行完成之后可以通过以下命令进行查看镜像(相信docker经验的人都非常熟悉了):

docker images

有上述这条就代表镜像已经安装成功了,接下来需要将该镜像启动并修改对应的一些配置信息如下:

docker run --env MODE=standalone --name nacos -d -p 18001:8848 nacos/nacos-server:1.2.1

启动成功后执行以下命令查看是否成功:

docker ps

这边做了端口映射，最后可以通过 ip(localhost):18001/nacos 访问，登录密码默认nacos/nacos

到这里nacos就算安装启动成功了,接下来就是安装seata服务了。

2.2 下载seata并安装启动

2.2.1 在 Seata Release 下载最新版的 Seata Server：

下载seata服务地址Seata Release

2.2.2 修改 conf/registry.conf 配置：

目前seata支持如下的file、nacos 、apollo、zk、consul的注册中心和配置中心。这里我们以nacos 为例。

将 type 改为 nacos，这里采用的是file的方式

registry {# file 、nacos 、eureka、redis、zk、consul、etcd3、sofatype = "nacos"nacos {serverAddr = "127.0.0.1:18001"namespace = "public"cluster = "default"}
}config {# file、nacos 、apollo、zk、consul、etcd3type = "file"file {name = "file.conf"}
}

serverAddr = “127.0.0.1:18001” ：nacos 的地址
namespace = “public” ：nacos的命名空间默认为public
cluster = “default” ：集群设置未默认 default

2.2.3 修改 conf/nacos-config.txt配置：

transport {# tcp udt unix-domain-sockettype = "TCP"#NIO NATIVEserver = "NIO"#enable heartbeatheartbeat = true#thread factory for nettythread-factory {boss-thread-prefix = "NettyBoss"worker-thread-prefix = "NettyServerNIOWorker"server-executor-thread-prefix = "NettyServerBizHandler"share-boss-worker = falseclient-selector-thread-prefix = "NettyClientSelector"client-selector-thread-size = 1client-worker-thread-prefix = "NettyClientWorkerThread"# netty boss thread size,will not be used for UDTboss-thread-size = 1#auto default pin or 8worker-thread-size = 8}shutdown {# when destroy server, wait secondswait = 3}serialization = "seata"compressor = "none"
}
service {#vgroup->rgroupvgroup_mapping.my_test_tx_group = "seata-service"#only support single nodedefault.grouplist = "127.0.0.1:8091"#degrade current not supportenableDegrade = false#disabledisable = false#unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanentmax.commit.retry.timeout = "-1"max.rollback.retry.timeout = "-1"
}client {async.commit.buffer.limit = 10000lock {retry.internal = 10retry.times = 30}report.retry.count = 5tm.commit.retry.count = 1tm.rollback.retry.count = 1
}## transaction log store
store {## store mode: file、dbmode = "db"## file storefile {dir = "sessionStore"# branch session size , if exceeded first try compress lockkey, still exceeded throws exceptionsmax-branch-session-size = 16384# globe session size , if exceeded throws exceptionsmax-global-session-size = 512# file buffer size , if exceeded allocate new bufferfile-write-buffer-cache-size = 16384# when recover batch read sizesession.reload.read_size = 100# async, syncflush-disk-mode = async}## database storedb {## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.datasource = "dbcp"## mysql/oracle/h2/oceanbase etc.db-type = "mysql"driver-class-name = "com.mysql.jdbc.Driver"url = "jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false"user = "root"password = "123456"min-conn = 1max-conn = 3global.table = "global_table"branch.table = "branch_table"lock-table = "lock_table"query-limit = 100}
}
lock {## the lock store mode: local、remotemode = "remote"local {## store locks in user's database}remote {## store locks in the seata's server}
}
recovery {#schedule committing retry period in millisecondscommitting-retry-period = 1000#schedule asyn committing retry period in millisecondsasyn-committing-retry-period = 1000#schedule rollbacking retry period in millisecondsrollbacking-retry-period = 1000#schedule timeout retry period in millisecondstimeout-retry-period = 1000
}transaction {undo.data.validation = trueundo.log.serialization = "jackson"undo.log.save.days = 7#schedule delete expired undo_log in millisecondsundo.log.delete.period = 86400000undo.log.table = "undo_log"
}## metrics settings
metrics {enabled = falseregistry-type = "compact"# multi exporters use comma dividedexporter-list = "prometheus"exporter-prometheus-port = 9898
}support {## springspring {# auto proxy the DataSource beandatasource.autoproxy = false}
}

vgroup_mapping.my_test_tx_group = “seata-service” 这里 "seata-service"是到时候让其他微服务注册seata中的名字：

  cloud:alibaba:seata:#自定义事务组名称需要与seata-server中的对应tx-service-group: seata-service

以下是数据库地址账号密码的配置，根据自己情况修改即可：

url = "jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false"
user = "root"
password = "123456"

db模式下的所需的三个表的数据库脚本位于seata\conf\db_store.sql

global_table的表结构：

CREATE TABLE `global_table` (`xid` varchar(128) NOT NULL,`transaction_id` bigint(20) DEFAULT NULL,`status` tinyint(4) NOT NULL,`application_id` varchar(64) DEFAULT NULL,`transaction_service_group` varchar(64) DEFAULT NULL,`transaction_name` varchar(64) DEFAULT NULL,`timeout` int(11) DEFAULT NULL,`begin_time` bigint(20) DEFAULT NULL,`application_data` varchar(2000) DEFAULT NULL,`gmt_create` datetime DEFAULT NULL,`gmt_modified` datetime DEFAULT NULL,PRIMARY KEY (`xid`),KEY `idx_gmt_modified_status` (`gmt_modified`,`status`),KEY `idx_transaction_id` (`transaction_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

branch_table的表结构：

CREATE TABLE `branch_table` (`branch_id` bigint(20) NOT NULL,`xid` varchar(128) NOT NULL,`transaction_id` bigint(20) DEFAULT NULL,`resource_group_id` varchar(32) DEFAULT NULL,`resource_id` varchar(256) DEFAULT NULL,`lock_key` varchar(128) DEFAULT NULL,`branch_type` varchar(8) DEFAULT NULL,`status` tinyint(4) DEFAULT NULL,`client_id` varchar(64) DEFAULT NULL,`application_data` varchar(2000) DEFAULT NULL,`gmt_create` datetime DEFAULT NULL,`gmt_modified` datetime DEFAULT NULL,PRIMARY KEY (`branch_id`),KEY `idx_xid` (`xid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

lock_table的表结构：

create table `lock_table` (`row_key` varchar(128) not null,`xid` varchar(96),`transaction_id` long ,`branch_id` long,`resource_id` varchar(256) ,`table_name` varchar(32) ,`pk` varchar(32) ,`gmt_create` datetime ,`gmt_modified` datetime,primary key(`row_key`)
);

然后将seata启动后就可以在nacos中看见了：

到这里就成功啦！