02-seata的部署和集成
1.下载
2.修改配置
修改conf目录下的registry.conf文件：
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
type = "nacos"
nacos {
application = "seata-server"
serverAddr = "ip:8848"
group = "DEFAULT_GROUP"
namespace = ""
cluster = "gz"
username = "nacos"
password = "nacos"
}
}
config {
# file、nacos 、apollo、zk、consul、etcd3
type = "nacos"
nacos {
serverAddr = "ip:8848"
namespace = ""
group = "SEATA_GROUP"
username = "nacos"
password = "nacos"
dataId = "seataServer.properties"
}
}
3.在nacos添加配置
特别注意，为了让tc服务的集群可以共享配置，我们选择了nacos作为统一配置中心。因此服务端配置文件seataServer.properties文件需要在nacos中配好。
# 数据存储方式，db代表数据库 store.mode=db 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=root store.db.password=123 store.db.minConn=5 store.db.maxConn=30 store.db.globalTable=global_table store.db.branchTable=branch_table store.db.queryLimit=100 store.db.lockTable=lock_table store.db.maxWait=5000 # 事务、日志等配置 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.undo.logSaveDays=7 server.undo.logDeletePeriod=86400000 # 客户端与服务端传输方式 transport.serialization=seata transport.compressor=none # 关闭metrics功能，提高性能 metrics.enabled=false metrics.registryType=compact metrics.exporterList=prometheus metrics.exporterPrometheusPort=9898
4.创建数据库
特别注意：tc服务在管理分布式事务时，需要记录事务相关数据到数据库中，你需要提前创建好这些表。这些表主要记录全局事务、分支事务、全局锁信息。
SET NAMES utf8mb4; SET FOREIGN_KEY_CHECKS = 0; -- ---------------------------- -- 分支事务表 -- ---------------------------- 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 = Compact; -- ---------------------------- -- 全局事务表 -- ---------------------------- 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 = Compact; SET FOREIGN_KEY_CHECKS = 1;
5.启动TC-SERVER服务
进入bin目录，运行其中的seata-server.bat即可：
启动成功后，seata-server应该已经注册到nacos注册中心了。
打开浏览器，访问nacos地址：http://localhost:8848，然后进入服务列表页面，可以看到seata-tc-server的信息。
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-seata</artifactId>
<exclusions>
<!--版本较低，1.3.0，因此排除-->
<exclusion>
<artifactId>seata-spring-boot-starter</artifactId>
<groupId>io.seata</groupId>
</exclusion>
</exclusions>
</dependency>
<!--seata starter 采用1.4.2版本-->
<dependency>
<groupId>io.seata</groupId>
<artifactId>seata-spring-boot-starter</artifactId>
<version>${seata.version}</version>
</dependency>
2.修改配置文件
seata:
registry: # TC服务注册中心的配置，微服务根据这些信息去注册中心获取tc服务地址
# 参考tc服务自己的registry.conf中的配置
type: nacos
nacos: # tc
server-addr: 127.0.0.1:8848
namespace: ""
group: DEFAULT_GROUP
application: seata-server # tc服务在nacos中的服务名称
cluster: SH
tx-service-group: seata-demo # 事务组，根据这个获取tc服务的cluster名称
service:
vgroup-mapping: # 事务组与TC服务cluster的映射关系
seata-demo: GZ
三、TC服务的高可用和异地容灾
1.模拟异地容灾的TC集群
计划启动两台seata的tc服务节点：
| ip地址 | 端口号 | 集群名称 | |
|---|---|---|---|
| seata | 127.0.0.1 | 8091 | SH |
| seata2 | 127.0.0.1 | 8092 |
现在，将seata目录复制一份，起名为seata2
修改seata2/conf/registry.conf内容如下：
registry { # tc服务的注册中心类，这里选择nacos，也可以是eureka、zookeeper等 type = "nacos" nacos { # seata tc 服务注册到 nacos的服务名称，可以自定义 application = "seata-tc-server" serverAddr = "127.0.0.1:8848" group = "DEFAULT_GROUP" namespace = "" cluster = "HZ" username = "nacos" password = "nacos" } } config { # 读取tc服务端的配置文件的方式，这里是从nacos配置中心读取，这样如果tc是集群，可以共享配置 type = "nacos" # 配置nacos地址等信息 nacos { serverAddr = "127.0.0.1:8848" namespace = "" group = "SEATA_GROUP" username = "nacos" password = "nacos" dataId = "seataServer.properties" } }
进入seata2/bin目录，然后运行命令：
seata-server.bat -p 8092
2.将事务组映射配置到nacos
接下来，我们需要将tx-service-group与cluster的映射关系都配置到nacos配置中心。
新建一个配置：
配置内容如下：
# 事务组映射关系 service.vgroupMapping.seata-demo=SH service.enableDegrade=false service.disableGlobalTransaction=false # 与TC服务的通信配置 transport.type=TCP transport.server=NIO transport.heartbeat=true transport.enableClientBatchSendRequest=false 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 # RM配置 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 # TM配置 client.tm.commitRetryCount=5 client.tm.rollbackRetryCount=5 client.tm.defaultGlobalTransactionTimeout=60000 client.tm.degradeCheck=false client.tm.degradeCheckAllowTimes=10 client.tm.degradeCheckPeriod=2000 # undo日志配置 client.undo.dataValidation=true client.undo.logSerialization=jackson client.undo.onlyCareUpdateColumns=true client.undo.logTable=undo_log client.undo.compress.enable=true client.undo.compress.type=zip client.undo.compress.threshold=64k client.log.exceptionRate=100
3.微服务读取nacos配置
接下来，需要修改每一个微服务的application.yml文件，让微服务读取nacos中的client.properties文件：
seata: config: type: nacos nacos: server-addr: 127.0.0.1:8848 username: nacos password: nacos group: SEATA_GROUP data-id: client.properties
重启微服务，现在微服务到底是连接tc的SH集群，还是tc的HZ集群，都统一由nacos的client.properties来决定了。
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