一台Linux服务器，使用docker 部署多个 SeaTa服务（一）【SeaTa集群篇】

一、前言：nacos准备工作

1、创建命名空间

创建好后我们可以看一下：

二、装第一个SeaTa服务

1、拉取镜像【这里说一下，必须跟我的版本一致】

docker pull seataio/seata-server:1.4.2

2、运行第一个容器

docker run --name seata-server01 -p 8091:8091 -d  seataio/seata-server:1.4.2

3、创建目录并赋予最高权限【！！这步很重要，不然后面可能于行不起来】

mkdir -m 777 /mydata/seata/

4、复制容器配置文件到宿主机

docker cp seata-server01:/seata-server  /mydata/seata

5、停止第一个容器

docker stop seata-server01

6、删除第一个容器

docker rm -f seata-server01

7、重新运行服务，至此服务已经启动完成，接下来就是在/mydata/seata/seata-server目录中修改对应的配置（设置开机自启和关键配置挂载到本地目录方便修改配置）

docker run -d --restart always  --name  seata-server01 -p 8091:8091  -v /mydata/seata/seata-server:/seata-server -e SEATA_IP=192.168.56.10 -e SEATA_PORT=8091 seataio/seata-server:1.4.2

8、查看容器运行日志
（!!!注意：如果运行不起来，请检查你映射到宿主机的配置文件目录是否有操作权限！！！）

docker logs seata-server01

9、切换到SeaTa的配置目录下

cd /mydata/seata/seata-server/resources

10、修改registry.conf文件，修为nacos启用方式

registry {
    
    
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"

  nacos {
    
    
    application = "seata-server"
    serverAddr = "192.168.56.10:8848"
	group = "SEATA_GROUP"
    namespace = "9d34df17-51c7-4fde-9ae8-8dd064fa4bd0"
    cluster = "s_cluster"
    username = "nacos"
    password = "nacos"
  }
  eureka {
    
    
    serviceUrl = "http://localhost:8761/eureka"
    application = "default"
    weight = "1"
  }
  redis {
    
    
    serverAddr = "localhost:6379"
    db = 0
    password = ""
    cluster = "default"
    timeout = 0
  }
  zk {
    
    
    cluster = "default"
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
  }
  consul {
    
    
    cluster = "default"
    serverAddr = "127.0.0.1:8500"
  }
  etcd3 {
    
    
    cluster = "default"
    serverAddr = "http://localhost:2379"
  }
  sofa {
    
    
    serverAddr = "127.0.0.1:9603"
    application = "default"
    region = "SEATA_GROUP"
    datacenter = "DefaultDataCenter"
    cluster = "default"
    group = "SEATA_GROUP"
    addressWaitTime = "3000"
  }
  file {
    
    
    name = "file.conf"
  }
}

config {
    
    
  # file、nacos 、apollo、zk、consul、etcd3
  type = "nacos"

  nacos {
    
    
    serverAddr = "192.168.56.10:8848"
    namespace = "9d34df17-51c7-4fde-9ae8-8dd064fa4bd0"
    group = "SEATA_GROUP"
    username = "nacos"
    password = "nacos"
  }
  consul {
    
    
    serverAddr = "127.0.0.1:8500"
  }
  apollo {
    
    
    appId = "seata-server"
    apolloMeta = "http://192.168.1.204:8801"
    namespace = "application"
  }
  zk {
    
    
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
  }
  etcd3 {
    
    
    serverAddr = "http://localhost:2379"
  }
  file {
    
    
    name = "file.conf"
  }
}

11、修改 file.cong 文件中存储方式为mysql

## transaction log store, only used in seata-server
store {
    
    
  ## store mode: file、db
  mode = "db"

  ## file store property
  file {
    
    
    ## store location dir
    dir = "sessionStore"
    # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
    maxBranchSessionSize = 16384
    # globe session size , if exceeded throws exceptions
    maxGlobalSessionSize = 512
    # file buffer size , if exceeded allocate new buffer
    fileWriteBufferCacheSize = 16384
    # when recover batch read size
    sessionReloadReadSize = 100
    # async, sync
    flushDiskMode = async
  }

  ## database store property
  db {
    
    
    ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
    datasource = "druid"
    ## mysql/oracle/postgresql/h2/oceanbase etc.
    dbType = "mysql"
    driverClassName = "com.mysql.cj.jdbc.Driver"
    url = "jdbc:mysql://192.168.56.10:3306/seata?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false&serverTimezone=Asia/Shanghai"
    user = "root"
    password = "root"
    minConn = 5
    maxConn = 30
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }
}

三、在SeaTa集群模式下，要把seata配置存到nacos里

配置文件导入的下载地址，我们可以把 config-center 这个文件夹下载下来

https://github.com/seata/seata/tree/1.4.2/script/config-center

下载完成后，可以把config-center 文件夹 传到服务器 , 比如我的就放在了这个位置 “/mydata/seata”

下载下来之后我们看到目录中有这些文件：

然后我们需要修改一下 config.txt 这个配置文件：

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
service.vgroupMapping.my_test_tx_group=default
#！！！这里改不改都行
service.default.grouplist=192.168.56.10:8091
service.enableDegrade=false
service.disableGlobalTransaction=false
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.sqlParserType=druid
client.rm.reportSuccessEnable=false
client.rm.sagaBranchRegisterEnable=false
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
store.mode=file
store.file.dir=file_store/data
store.file.maxBranchSessionSize=16384
store.file.maxGlobalSessionSize=512
store.file.fileWriteBufferCacheSize=16384
store.file.flushDiskMode=async
store.file.sessionReloadReadSize=100
store.db.datasource=druid
store.db.dbType=mysql
#这里改
store.db.driverClassName=com.mysql.cj.jdbc.Driver
#这里改
store.db.url=jdbc:mysql://192.168.56.10:3306/seata?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false&serverTimezone=Asia/Shanghai
#这里改
store.db.user=root
#这里改
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
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
client.undo.dataValidation=true
client.undo.logSerialization=jackson
server.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000
client.undo.logTable=undo_log
client.log.exceptionRate=100
transport.serialization=seata
transport.compressor=none
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898

进入到你上传的目录中：

cd /mydata/seata/config-center/nacos

执行导入脚本

#SEATA_GROUP 是分组名称；9d34df17-51c7-4fde-9ae8-8dd064fa4bd0 是刚才前言中nacos里创建的命名空间的ID
sh nacos-config.sh -h 192.168.56.10 -p 8848 -g SEATA_GROUP -t 9d34df17-51c7-4fde-9ae8-8dd064fa4bd0

完成后在nacos 里就能看见这些配置文件了：

然后我们重启 seata-server01 这个容器：

#然后重启容器
docker restart seata-server01

四、安装第二个seata服务

创建并运行第二个SeaTa容器服务，因为之前第一个容器里面是8091端口，所以这个记得改为SEATA_PORT=8092，不然nacos里根本就不显示这个实例！！！起来是能起来，但是nacos 里的实例数并没增加。

docker run -d --restart always  --name  seata-server02 -p 8092:8092  -v /mydata/seata/seata-server:/seata-server -e SEATA_IP=192.168.56.10 -e SEATA_PORT=8092 seataio/seata-server:1.4.2

启动完了之后我们看一下日志：

#查看第一个
docker logs  seata-server01
#查看第二个
docker logs  seata-server02

都启东了之后我们看下nacos 中的实例数：

目前集群部署已完成。