1.模拟异地容灾的TC集群
计划启动两台seata的tc服务节点:
节点名称 | ip地址 | 端口号 | 集群名称 |
---|---|---|---|
seata | 127.0.0.1 | 8091 | SH |
seata2 | 127.0.0.1 | 8092 | HZ |
之前我们已经启动了一台seata服务,端口是8091,集群名为SH。
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
打开nacos控制台,查看服务列表:
点进详情查看:
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:
配置的内容如下:
# 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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