seata服务端和客户端配置(使用nacos进行注册发现,使用mysql进行数据持久化),以及过程中可能会出现的问题与解决方案
seata服务端和客户端配置(使用nacos进行注册发现,使用mysql进行数据持久化),以及过程中可能会出现的问题与解决方案
说明:
之所以只用nacos进行了注册与发现,因为seata使用nacos后进行配置中心的化,需要往nacos中导入py脚本生成配置,还需要在服务端多加两个配置,过程比较繁琐,容易出问题,不太适合对这个框架理解不是很深的开发者
版本说明:
mysql 5.7
seata 1.4
springboot:2.3.7
springcloud:Hoxton.SR12
springcloudAlibaba: 2.2.6.RELEASE
服务端搭建及配置
下载seata 下载地址:下载中心 (seata.io)
上传至虚拟机/服务器/本地
解压该文件:解压后
进入conf目录
修改registry.conf文件
对应配置:
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
type = "nacos"
loadBalance = "RandomLoadBalance"
loadBalanceVirtualNodes = 10
nacos {
application = "seata-server"
serverAddr = "192.168.3.160:8848"
group = "SEATA_GROUP"
namespace = ""
cluster = "default"
username = ""
password = ""
}
file {
name = "file.conf"
}
}
config {
# file、nacos 、apollo、zk、consul、etcd3
type = "file"
nacos {
serverAddr = "127.0.0.1:8848"
namespace = ""
group = "SEATA_GROUP"
username = ""
password = ""
}
file {
name = "file.conf"
}
}
修改file.config文件
对应配置:
## 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.jdbc.Driver"
url = "jdbc:mysql://127.0.0.1:3306/seata"
user = "root"
password = "123456"
minConn = 5
maxConn = 100
globalTable = "global_table"
branchTable = "branch_table"
lockTable = "lock_table"
queryLimit = 100
maxWait = 5000
}
}
因为我们这里配置的持久化方式为mysql,在第六步中也有体现,这里需要将第六步配置的数据库创建出来
创建数据库库名为seata
导入SQL脚本,脚本为:
/*
Navicat Premium Data Transfer
Source Server : Mysql3.160
Source Server Type : MySQL
Source Server Version : 50732
Source Host : 192.168.3.160:3306
Source Schema : seata
Target Server Type : MySQL
Target Server Version : 50732
File Encoding : 65001
Date: 13/12/2021 14:33:52
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for branch_table
-- ----------------------------
DROP TABLE IF EXISTS `branch_table`;
CREATE TABLE `branch_table` (
`branch_id` bigint(20) NOT NULL,
`xid` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`transaction_id` bigint(20) NULL DEFAULT NULL,
`resource_group_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`branch_type` varchar(8) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`status` tinyint(4) NULL DEFAULT NULL,
`client_id` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`gmt_create` datetime(6) NULL DEFAULT NULL,
`gmt_modified` datetime(6) NULL DEFAULT NULL,
PRIMARY KEY (`branch_id`) USING BTREE,
INDEX `idx_xid`(`xid`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of branch_table
-- ----------------------------
-- ----------------------------
-- Table structure for global_table
-- ----------------------------
DROP TABLE IF EXISTS `global_table`;
CREATE TABLE `global_table` (
`xid` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`transaction_id` bigint(20) NULL DEFAULT NULL,
`status` tinyint(4) NOT NULL,
`application_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`transaction_service_group` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`transaction_name` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`timeout` int(11) NULL DEFAULT NULL,
`begin_time` bigint(20) NULL DEFAULT NULL,
`application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`gmt_create` datetime NULL DEFAULT NULL,
`gmt_modified` datetime NULL DEFAULT NULL,
PRIMARY KEY (`xid`) USING BTREE,
INDEX `idx_gmt_modified_status`(`gmt_modified`, `status`) USING BTREE,
INDEX `idx_transaction_id`(`transaction_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of global_table
-- ----------------------------
-- ----------------------------
-- Table structure for lock_table
-- ----------------------------
DROP TABLE IF EXISTS `lock_table`;
CREATE TABLE `lock_table` (
`row_key` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`xid` varchar(96) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`transaction_id` bigint(20) NULL DEFAULT NULL,
`branch_id` bigint(20) NOT NULL,
`resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`table_name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`pk` varchar(36) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`gmt_create` datetime NULL DEFAULT NULL,
`gmt_modified` datetime NULL DEFAULT NULL,
PRIMARY KEY (`row_key`) USING BTREE,
INDEX `idx_branch_id`(`branch_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of lock_table
-- ----------------------------
SET FOREIGN_KEY_CHECKS = 1;
导入后样子:
至此服务端配置配置完成,cd目录到bin目录通过以下命令进行启动,-h 127.0.0.1 可替换为真实的虚拟机地址,最好指定真实的,否则可能出现无法预估的错误
nohup sh seata-server.sh -p 8091 -h 127.0.0.1 -m file > catalina.out 2>&1 &
客户端配置
引入seata依赖
<!--seata-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-seata</artifactId>
<version>2021.1</version>
</dependency>
<!--mybatis-plus 因为需要替换mybatisplus的数据源,所以引入了这个依赖-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<scope>provided</scope>
</dependency>在resources下添加两个文件,分别为file.conf和registry.conf
registry.conf内容为
内容为:
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
type = "nacos"
loadBalance = "RandomLoadBalance"
loadBalanceVirtualNodes = 10
nacos {
application = "seata-server"
serverAddr = "192.168.3.160:8848"
group = "SEATA_GROUP"
namespace = ""
cluster = "default"
username = ""
password = ""
}
file {
name = "file.conf"
}
}
config {
# file、nacos 、apollo、zk、consul、etcd3
type = "file"
nacos {
serverAddr = "192.168.3.160:8848"
namespace = ""
group = "SEATA_GROUP"
username = ""
password = ""
}
file {
name = "file.conf"
}
}
file.conf内容为:此处需注意vgroupMapping这里进行了修改,原为vgroup_mapping,不改为驼峰会出现ip:port这个错误,导致项目起不来
内容如下:
transport {
# tcp udt unix-domain-socket
type = "TCP"
#NIO NATIVE
server = "NIO"
#enable heartbeat
heartbeat = true
#thread factory for netty
thread-factory {
boss-thread-prefix = "NettyBoss"
worker-thread-prefix = "NettyServerNIOWorker"
server-executor-thread-prefix = "NettyServerBizHandler"
share-boss-worker = false
client-selector-thread-prefix = "NettyClientSelector"
client-selector-thread-size = 1
client-worker-thread-prefix = "NettyClientWorkerThread"
# netty boss thread size,will not be used for UDT
boss-thread-size = 1
#auto default pin or 8
worker-thread-size = 8
}
}
service {
#vgroup->rgroup
vgroupMapping.from-sys_tx_group = "default"
#only support single node
default.grouplist = "192.168.3.160:8091"
#degrade current not support
enableDegrade = false
#disable
disable = false
}
## 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.jdbc.Driver"
url = "jdbc:mysql://192.168.3.160:3306/seata"
user = "root"
password = "123456"
minConn = 5
maxConn = 30
globalTable = "global_table"
branchTable = "branch_table"
lockTable = "lock_table"
queryLimit = 100
maxWait = 5000
}
}
application.yml需配置以下内容:
内容如下:
spring:
#---------------数据库连接配置--------------
datasource:
type: com.alibaba.druid.pool.DruidDataSource
# 连接url
url: jdbc:mysql://192.168.3.160:3306/from-sys?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8&useSSL=false&autoReconnect=true&serverTimezone=Asia/Shanghai&nullCatalogMeansCurrent=true
# 驱动名称
driver-class-name: com.mysql.jdbc.Driver
username: root
password: 123456
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT user()
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
connection-properties: druid.stat.mergeSql:true;druid.stat.slowSqlMillis:5000
# -------------- nacos配置---------------
cloud:
nacos:
discovery:
server-addr: 192.168.3.160:8848
alibaba:
seata:
tx-service-group: ${spring.application.name}_tx_group
seata:
registry:
type: nacos
nacos:
server-addr: 192.168.3.160:8848
group: "SEATA_GROUP"
namespace: ""
username: "nacos"
password: "nacos"
server:
port: 9001
servlet:
context-path: /sys/
配置代理数据源
package com.from.seata.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.baomidou.mybatisplus.autoconfigure.MybatisPlusProperties;
import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import io.seata.rm.datasource.DataSourceProxy;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import javax.sql.DataSource;
@Configuration
@EnableConfigurationProperties({MybatisPlusProperties.class})
public class DataSourcesProxyConfig {
@Bean
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource druidDataSource() {
return new DruidDataSource();
}
//创建代理数据源
@Primary//@Primary标识必须配置在代码数据源上，否则本地事务失效
@Bean
public DataSourceProxy dataSourceProxy(DataSource druidDataSource) {
return new DataSourceProxy(druidDataSource);
}
private MybatisPlusProperties properties;
public DataSourcesProxyConfig(MybatisPlusProperties properties) {
this.properties = properties;
}
//替换SqlSessionFactory的DataSource
@Bean
public MybatisSqlSessionFactoryBean sqlSessionFactory(DataSourceProxy dataSourceProxy) throws Exception {
// 这里必须用 MybatisSqlSessionFactoryBean 代替了 SqlSessionFactoryBean，否则 MyBatisPlus 不会生效
MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean = new MybatisSqlSessionFactoryBean();
mybatisSqlSessionFactoryBean.setDataSource(dataSourceProxy);
mybatisSqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
// mybatisSqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
// .getResources("classpath:/mapper/**/*.xml"));
MybatisConfiguration configuration = this.properties.getConfiguration();
if(configuration == null){
configuration = new MybatisConfiguration();
}
mybatisSqlSessionFactoryBean.setConfiguration(configuration);
return mybatisSqlSessionFactoryBean;
}
}至此seata的分布式事务就配置完成了,可以优化为seata单独抽成一个模块,当我们服务需要使用分布式事务时候,引入seata模块的依赖,进行相同的配file,registry,yml配置即可,只需修改以下下内容,其他配置不变即可
你可能遇到的bug:
1.Failed to get available servers: endpoint format should like ip:port
file.conf中的vgroupMapping你用的可能是vgroup_mapping
0101 can not connect to 127.0.0.1:8091 cause:can not register RM,err:can not connect to services-server. nacos注册发现的情况下:则是由于yml里面没有配置seata的注册发现造成的
0101 can not connect to 远程地址:8091 cause:can not register RM,err:can not connect to services-server.
由于你的启动seata服务时候没有指定IP端口造成的,导致你注册到nacos上的seata服务地址跟你客户端预想的seata地址不一致造成的,修改为真实的你的服务器地址
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