centos7安装nacos、seata

1.查看官网推荐的稳定版本

https://nacos.io/zh-cn/docs/quick-start.html

nacos官网

2.下载对应版本压缩包并上传至服务器（此处选择官网推荐的稳定版本nacos-server-2.0.3）

wget https://github.com/alibaba/nacos/releases/download/2.0.3/nacos-server-2.0.3.tar.gz
或 wget https://download.fastgit.org/alibaba/nacos/releases/download/2.0.3/nacos-server-2.0.3.tar.gz

nacos-server-2.0.3

可自行去https://github.com/alibaba/nacos/releases下载自己想安装的版本

3.解压至自己想要安装的目录

tar -zxvf nacos-server-2.0.3.tar.gz -C /usr/local

4.启动（单机版）

cd nacos/bin

sh startup.sh -m standalone

4.启动 （集群版）

nacos集群模式架构图

参考→ https://blog.csdn.net/tang_seven/article/details/118556567
https://www.cnblogs.com/fanshuyao/p/14577977.html
https://www.cnblogs.com/FlyAway2013/p/11201250.html
https://blog.csdn.net/xkuna/article/details/108031396

5.验证

访问 http://服务器ip:8848/nacos (默认账号密码均为nacos,登录后可修改)

image.png

由于未做任何配置文件的修改，此时使用的是默认的derby数据库。在没有对Nacos做任何数据源配置的情况下，官方默认提供了嵌入式数据库：Derby，来实现数据的存储。

Derby是用Java库编写的数据库，属于Apache的一个开源项目。 在实际的生产环境中，一般不会用Nacos官方提供的嵌入式数据库方式存储数据，幸运的是Nacos提供Mysql数据存储方式，所以接下来要讲的内容是：“如何利用Mysql改造Nacos的数据存储方式”，以方便观察数据存储的基本情况。

打开Nacos Server的data目录，其数据存储放在derby-data目录下。
nacos使用mysql数据库代替内置的数据库https://blog.csdn.net/Denial_learn/article/details/120160280
https://blog.csdn.net/weixin_43810802/article/details/106730973
https://blog.csdn.net/wdquan19851029/article/details/122714741

登录到nacos，在命名空间页面创建namespace，接下来seata以及springcloud项目会使用到。

安装seata

1. 下载

seata下载地址：下载中心 (seata.io)

2. 解压seata压缩包：

tar -zxvf seata-server-1.4.1-myself.zip

3. 修改配置文件：

cd /seata/conf

虽然只是部署单机版，但是我们使用集群的方式去配置，配置信息中使用到nacos和mysql。

首先配置注册中和和配置中心，修改conf/registry.conf

其中的namespace，应该是先去nacos创建，然后得到Id后，贴在seata的配置文件里。

registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"
  loadBalance = "RandomLoadBalance"
  loadBalanceVirtualNodes = 10
 
  nacos {
    application = "seata-server"
    serverAddr = "192.168.0.107:8848"
    group = "SEATA_GROUP"
    namespace = ""
    cluster = "default"
    username = ""
    password = ""
  }
 
..................
 
config {
  # file、nacos 、apollo、zk、consul、etcd3
  type = "nacos"
 
  nacos {
    serverAddr = "192.168.0.107:8848"
    namespace = ""
    group = "SEATA_GROUP"
    username = ""
    password = ""
  }

数据库配置 conf/file.conf

seata-server的存储模式有file和db两种，可以通过store.mode属性配置，默认的存储方式是file。
file模式下，seata的事务相关信息会走内存，并持久化到root.data文件中，这种模式性能较高。
db模式是一种高可用的模式，seata的全局事务，分支事务和锁都在数据库中存储，相关表已经在上面创建数据库的时候做好了。

store {
  ## store mode: file、db、redis
  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)/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

3. 将seata配置数据导入到nacos配置中心

具体介绍，请参考下面的官方文档。

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

1.创建config.txt文件，在里面添加seata配置
配置信息如下：

主要是修改seata的数据库配置

#For details about configuration items, see https://seata.io/zh-cn/docs/user/configurations.html
#Transport configuration, for client and server
transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.enableTmClientBatchSendRequest=false
transport.enableRmClientBatchSendRequest=true
transport.enableTcServerBatchSendResponse=false
transport.rpcRmRequestTimeout=30000
transport.rpcTmRequestTimeout=30000
transport.rpcTcRequestTimeout=30000
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
transport.serialization=seata
transport.compressor=none
 
#Transaction routing rules configuration, only for the client
service.vgroupMapping.my_test_tx_group=default
#If you use a registry, you can ignore it
service.default.grouplist=127.0.0.1:8091
service.enableDegrade=false
service.disableGlobalTransaction=false
 
#Transaction rule configuration, only for the client
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
client.rm.sagaJsonParser=fastjson
client.rm.tccActionInterceptorOrder=-2147482648
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.defaultGlobalTransactionTimeout=60000
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000
client.tm.interceptorOrder=-2147482648
client.undo.dataValidation=true
client.undo.logSerialization=jackson
client.undo.onlyCareUpdateColumns=true
server.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000
client.undo.logTable=undo_log
client.undo.compress.enable=true
client.undo.compress.type=zip
client.undo.compress.threshold=64k
#For TCC transaction mode
tcc.fence.logTableName=tcc_fence_log
tcc.fence.cleanPeriod=1h
 
#Log rule configuration, for client and server
log.exceptionRate=100
 
#Transaction storage configuration, only for the server. The file, DB, and redis configuration values are optional.
store.mode=file
store.lock.mode=file
store.session.mode=file
#Used for password encryption
store.publicKey=
 
#If `store.mode,store.lock.mode,store.session.mode` are not equal to `file`, you can remove the configuration block.
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
 
#These configurations are required if the `store mode` is `db`. If `store.mode,store.lock.mode,store.session.mode` are not equal to `db`, you can remove the configuration block.
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=123456
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.distributedLockTable=distributed_lock
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000
 
#These configurations are required if the `store mode` is `redis`. If `store.mode,store.lock.mode,store.session.mode` are not equal to `redis`, you can remove the configuration block.
store.redis.mode=single
store.redis.single.host=127.0.0.1
store.redis.single.port=6379
store.redis.sentinel.masterName=
store.redis.sentinel.sentinelHosts=
store.redis.maxConn=10
store.redis.minConn=1
store.redis.maxTotal=100
store.redis.database=0
store.redis.password=
store.redis.queryLimit=100
 
#Transaction rule configuration, only for the server
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.distributedLockExpireTime=10000
server.session.branchAsyncQueueSize=5000
server.session.enableBranchAsyncRemove=true
 
#Metrics configuration, only for the server
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898

以及脚本nacos-config.sh

#!/bin/sh
# Copyright 1999-2019 Seata.io Group.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at、
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
 
while getopts ":h:p:g:t:u:w:" opt
do
  case $opt in
  h)
    host=$OPTARG
    ;;
  p)
    port=$OPTARG
    ;;
  g)
    group=$OPTARG
    ;;
  t)
    tenant=$OPTARG
    ;;
  u)
    username=$OPTARG
    ;;
  w)
    password=$OPTARG
    ;;
  ?)
    echo " USAGE OPTION: $0 [-h host] [-p port] [-g group] [-t tenant] [-u username] [-w password] "
    exit 1
    ;;
  esac
done
 
if [ -z ${host} ]; then
    host=localhost
fi
if [ -z ${port} ]; then
    port=8848
fi
if [ -z ${group} ]; then
    group="SEATA_GROUP"
fi
if [ -z ${tenant} ]; then
    tenant=""
fi
if [ -z ${username} ]; then
    username=""
fi
if [ -z ${password} ]; then
    password=""
fi
 
nacosAddr=$host:$port
contentType="content-type:application/json;charset=UTF-8"
 
echo "set nacosAddr=$nacosAddr"
echo "set group=$group"
 
urlencode() {
  length="${#1}"
  i=0
  while [ $length -gt $i ]; do
    char="${1:$i:1}"
    case $char in
    [a-zA-Z0-9.~_-]) printf $char ;;
    *) printf '%%%02X' "'$char" ;;
    esac
    i=`expr $i + 1`
  done
}
 
failCount=0
tempLog=$(mktemp -u)
function addConfig() {
  dataId=`urlencode $1`
  content=`urlencode $2`
  curl -X POST -H "${contentType}" "http://$nacosAddr/nacos/v1/cs/configs?dataId=$dataId&group=$group&content=$content&tenant=$tenant&username=$username&password=$password" >"${tempLog}" 2>/dev/null
  if [ -z $(cat "${tempLog}") ]; then
    echo " Please check the cluster status. "
    exit 1
  fi
  if [ "$(cat "${tempLog}")" == "true" ]; then
    echo "Set $1=$2 successfully "
  else
    echo "Set $1=$2 failure "
    failCount=`expr $failCount + 1`
  fi
}
 
count=0
COMMENT_START="#"
for line in $(cat $(dirname "$PWD")/config.txt | sed s/[[:space:]]//g); do
    if [[ "$line" =~ ^"${COMMENT_START}".*  ]]; then
      continue
    fi
    count=`expr $count + 1`
      key=${line%%=*}
    value=${line#*=}
      addConfig "${key}" "${value}"
done
 
echo "========================================================================="
echo " Complete initialization parameters,  total-count:$count ,  failure-count:$failCount "
echo "========================================================================="
 
if [ ${failCount} -eq 0 ]; then
    echo " Init nacos config finished, please start seata-server. "
else
    echo " init nacos config fail. "
fi

导入seata配置到nacos：

sh ${SEATAPATH}/bin/nacos-config.sh -h localhost -p 8848 -g SEATA_GROUP -t 3b1d752c-06e0-4bf4-a29e-3de5e89a3fca -u nacos-w nacos

说明：3b1d752c-06e0-4bf4-a29e-3de5e89a3fca换成自己的nacos的值

参数说明：

Parameter Description:
-h: host, the default value is localhost.
-p: port, the default value is 8848.
-g: Configure grouping, the default value is 'SEATA_GROUP'.
-t: Tenant information, corresponding to the namespace ID field of Nacos, the default value is ''.
-u: username, nacos 1.2.0+ on permission control, the default value is ''.
-w: password, nacos 1.2.0+ on permission control, the default value is ''.

4. 启动seata：

cd /seata/bin
nohup sh seata-server.sh -p 8091 -h 192.168.0.107 &

未完待续。。。