linux(centos8):安装分布式事务服务seata(file单机模式,seata 1.3.0/centos 8.2)

一，什么是seata?

Seata:Simpe Extensible Autonomous Transcaction Architecture，
是阿里中间件,开源的分布式事务解决方案。
前身是阿里的Fescar

官方站:

http://seata.io/zh-cn/

官方代码地址:

https://github.com/seata/seata

官方文档站:

http://seata.io/zh-cn/docs/overview/what-is-seata.html

各版本的release下载地址:

https://github.com/seata/seata/releases

说明：刘宏缔的架构森林是一个专注架构的博客，地址：https://www.cnblogs.com/architectforest

对应的源码可以访问这里获取： https://github.com/liuhongdi/

说明：作者:刘宏缔邮箱: 371125307@qq.com

二，安装seata前准备java环境：

因为seata是基于java开发的，所以需要先在机器上准备java环境
1,下载java
从官方站下载：

https://www.oracle.com/cn/java/technologies/javase-downloads.html

下载完成后查看当前目录:

[root@localhost java]# pwd

/usr/local/source/java

[root@localhost java]# ls

jdk-14.0.2_linux-x64_bin.tar.gz

2,解压和安装:

解压:

[root@localhost java]# tar -zxvf jdk-14.0.2_linux-x64_bin.tar.gz

把解压后的jdk目录，移动到安装目录/usr/local/soft目录下:

[root@localhost java]# mv jdk-14.0.2 /usr/local/soft/

3,配置java
编辑profile文件:

[root@localhost java]# vi /etc/profile

内容：

export JAVA_HOME=/usr/local/soft/jdk-14.0.2

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib

export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin

使变量生效：

[root@localhost java]# source /etc/profile

4,测试java的安装效果

[root@localhost liuhongdi]# java --version

java 14.0.2 2020-07-14

Java(TM) SE Runtime Environment (build 14.0.2+12-46)

Java HotSpot(TM) 64-Bit Server VM (build 14.0.2+12-46, mixed mode, sharing)

三，下载seata:

1,用wget命令下载
创建一个源文件存放目录:/usr/local/source/seata,
在这个目录下下载和解压

[root@localhost seata]# wget https://github.com/seata/seata/releases/download/v1.3.0/seata-server-1.3.0.tar.gz

2,解压后并移动到安装目录:

[root@localhost seata]# ls

seata-server-1.3.0.tar.gz

[root@localhost seata]# tar -zxvf seata-server-1.3.0.tar.gz

[root@localhost seata]# mv seata /usr/local/soft/

[root@localhost seata]# cd /usr/local/soft/seata/

四,配置seata

1,生成日志目录:

[root@localhost seata]# mkdir /data/seata

[root@localhost seata]# mkdir /data/seata/logs

[root@localhost seata]# chmod 777 /data/seata/logs

2,进入安装目录下

[root@localhost seata]# cd conf/

[root@localhost conf]# vi logback.xml

修改内容：
修改LOG_HOME为我们创建的目录

<property name="LOG_HOME" value="/data/seata/logs”/>

3,创建seata的gc日志目录

[root@localhost seata]# pwd

/usr/local/soft/seata

[root@localhost seata]# mkdir logs

说明：seata默认会使用这个目录保存java运行时的gclog

五,启动并检测是否运行中

1,启动

[root@localhost seata]# nohup sh ./bin/seata-server.sh -p 8091 > /data/seata/logs/seata_runtime.out 2>&1 &

[1] 2062

2,检查查端口是否在监听中:

[root@localhost bin]# telnet localhost 8091

Trying ::1...

Connected to localhost.

Escape character is '^]'.

^]

telnet> quit

Connection closed.

六，用systemctl管理seata

1，创建seata启动文件：保存到安装目录/bin目录下

[root@localhost seata]# cd bin/

[root@localhost bin]# vi seata-start.sh

[root@localhost bin]# more seata-start.sh

#!/bin/bash

sh /usr/local/soft/seata/bin/seata-server.sh -p 8091

[root@localhost bin]# chmod +x seata-start.sh

2，创建service文件

[root@localhost bin]# vi /usr/lib/systemd/system/seata.service

内容:

[Unit]

Description=seata-server

After=syslog.target network.target

[Service]

Type=simple

ExecStart=/usr/local/soft/seata/bin/seata-start.sh

Restart=always

PrivateTmp=true

[Install]

WantedBy=multi-user.target

3,启动service

[root@localhost bin]# systemctl daemon-reload

[root@localhost bin]# systemctl start seata.service

4,查看是否运行中?

[root@localhost ~]# systemctl status seata.service

● seata.service - seata-server

   Loaded: loaded (/usr/lib/systemd/system/seata.service; disabled; vendor preset: disabled)

   Active: active (running) since Sat 2020-08-15 09:59:03 CST; 2s ago

 Main PID: 1726 (seata-start.sh)

    Tasks: 29 (limit: 4642)

   Memory: 145.7M

   CGroup: /system.slice/seata.service

           ├─1726 /bin/bash /usr/local/soft/seata/bin/seata-start.sh

           └─1727 /usr/bin/java -server -Xmx2048m -Xms2048m -Xmn1024m -Xss512k -XX:SurvivorRatio=10

...

可以看到状态为 active (running)

5,用ss查看端口:

[root@localhost ~]# ss -lntp

State       Recv-Q      Send-Q            Local Address:Port             Peer Address:Port

LISTEN      0           1024                          *:8091             *:*   users:(("java",pid=1727,fd=176))

七，查看seata-server可用的参数

用--help

[root@localhost ~]# /usr/local/soft/seata/bin/seata-server.sh --help

可以看到参数：

...

Usage: sh seata-server.sh(for linux and mac) or cmd seata-server.bat(for

      windows) [options]

  Options:

    --host, -h

      The ip to register to registry center.

    --port, -p

      The port to listen.

      Default: 8091

    --storeMode, -m

      log store mode : file, db

    --serverNode, -n

      server node id, such as 1, 2, 3.it will be generated according to the

      snowflake by default

    --seataEnv, -e

      The name used for multi-configuration isolation.

    --help

八，查看linux的版本 :

[root@localhost java]$ cat /etc/redhat-release

CentOS Linux release 8.2.2004 (Core)