一、部署Seata的tc-server
1.下载
下载seata-server地址在:http://seata.io/zh-cn/blog/download.html,版本:1.5.1。或使用提供好的资料中的:seata-server-1.5.1.zip
2.解压
在非中文目录解压缩这个zip包,其目录结构如下:
3.修改配置
修改conf目录下的application.yml文件,内容如下:
server:
port: 7091
spring:
application:
name: seata-server
logging:
config: classpath:logback-spring.xml
file:
path: ${user.home}/logs/seata
console:
user:
username: seata
password: seata
seata:
config:
# 读取tc服务端的配置文件的方式,这里是从nacos配置中心读取,这样如果tc是集群,可以共享配置
type: nacos
nacos:
server-addr: 127.0.0.1:8848
namespace:
group: SEATA_GROUP
username: nacos
password: nacos
##if use MSE Nacos with auth, mutex with username/password attribute
#access-key: ""
#secret-key: ""
data-id: seataServer.properties
registry:
# tc服务的注册中心类,这里选择nacos,也可以是eureka、zookeeper等
type: nacos
nacos:
application: seata-server
server-addr: 127.0.0.1:8848
group: DEFAULT_GROUP
namespace:
cluster: GZ
username: nacos
password: nacos
server:
service-port: 8091 #If not configured, the default is '${server.port} + 1000'
security:
secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
tokenValidityInMilliseconds: 1800000
ignore:
urls: /,//*.css,//.js,/**/.html,//*.map,//.svg,/**/.png,//*.ico,/console-fe/public/,/api/v1/auth/login
4.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。格式如下:
配置内容如下:
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=root
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
其中的数据库地址、用户名、密码都需要修改成你自己的数据库信息。
5.创建数据库表
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。
新建一个名为seata的数据库,运行sql(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;
6.启动TC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seata控制台;地址:http://localhost:7091
打开浏览器,访问nacos地址:http://localhost:8848/nacos,然后进入服务列表页面,可以看到seata-server的信息:
二、微服务集成seata
需要进行分布式事务处理的每个微服务上都配置如下:
1.引入依赖
首先,我们需要在每个微服务中引入seata依赖:
com.alibaba.cloud
spring-cloud-starter-alibaba-seata
seata-spring-boot-starter
io.seata
io.seata
seata-spring-boot-starter
${seata.version}
2.修改配置文件
需要修改每个微服务中的application.yml文件,添加一些配置:
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application.yml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: GZ #无效
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:
节点名称 ip地址 端口号 集群名称
seata 127.0.0.1 8091 GZ
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GZ。现在,将seata目录复制一份,起名为seata2。修改seata2/conf/application.yml内容如下:
server:
port: 7092
spring:
application:
name: seata-server
logging:
config: classpath:logback-spring.xml
file:
path: ${user.home}/logs/seata
console:
user:
username: seata
password: seata
seata:
config:
# 读取tc服务端的配置文件的方式,这里是从nacos配置中心读取,这样如果tc是集群,可以共享配置
type: nacos
nacos:
server-addr: 127.0.0.1:8848
namespace:
group: SEATA_GROUP
username: nacos
password: nacos
##if use MSE Nacos with auth, mutex with username/password attribute
#access-key: ""
#secret-key: ""
data-id: seataServer.properties
registry:
# tc服务的注册中心类,这里选择nacos,也可以是eureka、zookeeper等
type: nacos
nacos:
application: seata-server
server-addr: 127.0.0.1:8848
group: DEFAULT_GROUP
namespace:
cluster: HZ
username: nacos
password: nacos
server:
service-port: 8092 #If not configured, the default is '${server.port} + 1000'
security:
secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
tokenValidityInMilliseconds: 1800000
ignore:
urls: /,//*.css,//.js,/**/.html,//*.map,//.svg,/**/.png,//*.ico,/console-fe/public/,/api/v1/auth/login
进入seata2/bin目录,然后运行双击 seata-server.bat。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=GZ
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
也注释掉原来文件中的如下内容(如果不注释也可以;则作为一个默认,对动态切换集群不受影响):
service:
vgroup-mapping: # 事务组与TC服务cluster的映射关系
seata-demo: GZ
重启微服务,现在微服务到底是连接tc的GZ集群,还是tc的HZ集群,都统一由nacos的client.properties来决定了。