1.设置主从从mysql57服务器
（1）配置主数据库
[root@msater_5 ~]# systemctl stop firewalld
[root@msater_5 ~]# setenforce 0
[root@msater_5 ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@msater_5 ~]# ls
anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
[root@msater_5 ~]# tar -xf mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
[root@msater_5 ~]# ls
anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
mysql-5.7.44-linux-glibc2.12-x86_64
[root@msater_5 ~]# cp -r mysql-5.7.44-linux-glibc2.12-x86_64 /usr/local/mysql
[root@msater_5 ~]# rm -rf /etc/my.cnf
[root@msater_5 ~]# mkdir /usr/local/mysql/mysql-files
[root@msater_5 ~]# useradd -r -s /sbin/nologin mysql
[root@msater_5 ~]# chown mysql:mysql /usr/local/mysql/mysql-files/
[root@msater_5 ~]# chown 750 /usr/local/mysql/mysql-files/
[root@msater_5 ~]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql
2024-08-21T09:39:14.991434Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2024-08-21T09:39:15.126969Z 0 [Warning] InnoDB: New log files created, LSN=45790
2024-08-21T09:39:15.150963Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2024-08-21T09:39:15.214887Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 3ac52ccc-5fa1-11ef-98a1-000c29374e2c.
2024-08-21T09:39:15.215926Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2024-08-21T09:39:16.034519Z 0 [Warning] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher.
2024-08-21T09:39:16.034537Z 0 [Warning] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher.
2024-08-21T09:39:16.036321Z 0 [Warning] CA certificate ca.pem is self signed.
2024-08-21T09:39:16.384066Z 1 [Note] A temporary password is generated for root@localhost: RV3DtuxCi;A-
[root@msater_5 ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql57
[root@msater_5 ~]# vim /usr/local/mysql/my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/db01-master.err
log-bin=/usr/local/mysql/data/binlog
server-id=10
character_set_server=utf8mb4
[root@msater_5 ~]# service mysql57 start
Starting MySQL.Logging to '/usr/local/mysql/data/db01-master.err'.
SUCCESS!
[root@msater_5 ~]# /usr/local/mysql/bin/mysql -p
Enter password:
mysql> alter user 'root'@'localhost' identified by 'root';
Query OK, 0 rows affected (0.00 sec)
mysql> create user 'zzz'@'%' identified by 'zzz';
Query OK, 0 rows affected (0.00 sec)
mysql> grant all on *.* to 'zzz'@'%';
Query OK, 0 rows affected (0.01 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
mysql> create user 'slave'@'%' identified by 'slave';
Query OK, 0 rows affected (0.00 sec)
mysql> grant replication slave on *.* to 'slave'@'%';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
（2）配置slave01数据库
[root@slave01_5 ~]# ls
anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
[root@slave01_5 ~]# systemctl stop firewalld
[root@slave01_5 ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@slave01_5 ~]# setenforce 0
[root@slave01_5 ~]# tar -xf mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
[root@slave01_5 ~]# cp -r mysql-5.7.44-linux-glibc2.12-x86_64 /usr/local/mysql
[root@slave01_5 ~]# rm -rf /etc/my.cnf
[root@slave01_5 ~]# mkdir /usr/local/mysql/mysql-files
[root@slave01_5 ~]# useradd -r -s /sbin/nologin mysql
[root@slave01_5 ~]# chown mysql:mysql /usr/local/mysql/mysql-files/
[root@slave01_5 ~]# chown 750 /usr/local/mysql/mysql-files/
[root@slave01_5 ~]# yum -y install rsync（3）配置slave02数据库
[root@slave02_5 ~]# ls
anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
[root@slave02_5 ~]# scp mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz 192.168.2.57:/root
The authenticity of host '192.168.2.57 (192.168.2.57)' can't be established.
ECDSA key fingerprint is SHA256:E2ARFFif/HyOpjlCgDRoPqYSl2OL4PwdcX1h9cPRJiY.
ECDSA key fingerprint is MD5:35:b0:cd:3b:e0:fa:10:4a:22:5e:94:aa:b7:5c:e2:79.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.2.57' (ECDSA) to the list of known hosts.
root@192.168.2.57's password:
mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz 100% 663MB 85.5MB/s 00:07
[root@slave02_5 ~]# scp mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz 192.168.2.58:/root
The authenticity of host '192.168.2.58 (192.168.2.58)' can't be established.
ECDSA key fingerprint is SHA256:E2ARFFif/HyOpjlCgDRoPqYSl2OL4PwdcX1h9cPRJiY.
ECDSA key fingerprint is MD5:35:b0:cd:3b:e0:fa:10:4a:22:5e:94:aa:b7:5c:e2:79.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.2.58' (ECDSA) to the list of known hosts.
root@192.168.2.58's password:
mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz 100% 663MB 83.1MB/s 00:07
[root@slave02_5 ~]# systemctl stop firewalld
[root@slave02_5 ~]# systemctl disable firewalld
[root@slave02_5 ~]# setenforce 0
[root@slave02_5 ~]# tar -xf mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
[root@slave02_5 ~]# cp -r mysql-5.7.44-linux-glibc2.12-x86_64 /usr/local/mysql
[root@slave02_5 ~]# rm -rf /etc/my.cnf
[root@slave02_5 ~]# mkdir /usr/local/mysql/mysql-files
[root@slave02_5 ~]# useradd -r -s /sbin/nologin mysql
[root@slave02_5 ~]# chown mysql:mysql /usr/local/mysql/mysql-files/
[root@slave02_5 ~]# chown 750 /usr/local/mysql/mysql-files/
[root@slave02_5 ~]# yum -y install rsync
（4）同步data
[root@msater_5 ~]# service mysql57 stop
Shutting down MySQL.... SUCCESS!
[root@msater_5 ~]# rm -rf /usr/local/mysql/data/auto.cnf
[root@msater_5 ~]# yum -y install rsync
[root@msater_5 ~]# rsync -av /usr/local/mysql/data root@192.168.2.58:/usr/local/mysql/
[root@msater_5 ~]# rsync -av /usr/local/mysql/data root@192.168.2.59:/usr/local/mysql/（5）修改slave01配置文件
[root@slave01_5 ~]# ls /usr/local/mysql/
bin docs lib man README support-files
data include LICENSE mysql-files share
[root@slave01_5 ~]# vim /usr/local/mysql/my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/err.log
relay-log=/usr/local/mysql/data/relaylog
character_set_server=utf8mb4
server-id=11
[root@slave01_5 ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql57
[root@slave01_5 ~]# sed -i '$aexport PATH=$PATH:/usr/local/mysql/bin' /etc/profile
[root@slave01_5 ~]# source /etc/profile
（6）修改slave02配置文件
[root@slave02_5 ~]# ls /usr/local/mysql
bin docs lib man README support-files
data include LICENSE mysql-files share
[root@slave02_5 ~]# vim /usr/local/mysql/my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/err.log
relay-log=/usr/local/mysql/data/relaylog
character_set_server=utf8mb4
server-id=12
[root@slave02_5 ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql57
[root@slave02_5 ~]# sed -i '$aexport PATH=$PATH:/usr/local/mysql/bin' /etc/profile
[root@slave02_5 ~]# source /etc/profile
（7）主服务器锁表
[root@msater_5 ~]# mysql -proot
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.44-log MySQL Community Server (GPL)
Copyright (c) 2000, 2023, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select user,host from mysql.user;
+---------------+-----------+
| user | host |
+---------------+-----------+
| slave | % |
| zzz | % |
| mysql.session | localhost |
| mysql.sys | localhost |
| root | localhost |
+---------------+-----------+
5 rows in set (0.00 sec)
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status;
+---------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000002 | 154 | | | |
+---------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)（8）配置主从服务
[root@slave01_5 ~]# mysql -uroot -proot
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.44 MySQL Community Server (GPL)
Copyright (c) 2000, 2023, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> change master to master_host="192.168.2.57",master_user="slave",master_password="slave",master_log_file="binlog.000002",master_log_pos=154;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.2.57
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: binlog.000002
Read_Master_Log_Pos: 154
Relay_Log_File: relaylog.000002
Relay_Log_Pos: 317
Relay_Master_Log_File: binlog.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
（9）配置主从从服务
[root@slave02_5 ~]# mysql -proot
mysql> change master to master_host="192.168.2.57",master_user="slave",master_password="slave",master_log_file="binlog.000002",master_log_pos=154;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.2.57
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: binlog.000002
Read_Master_Log_Pos: 154
Relay_Log_File: relaylog.000002
Relay_Log_Pos: 317
Relay_Master_Log_File: binlog.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
2.在mysql中添加eleme数据库设置为utf8mb4
[root@msater_5 ~]# mysql -proot
mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)
mysql> create database if not exists eleme charset utf8mb4;
Query OK, 1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| eleme |
| mysql |
| performance_schema |
| sys |
| test |
+--------------------+
6 rows in set (0.00 sec)3.添加表t_user（master）
mysql> use eleme;
Database changed
mysql> create table t_user(
-> id int primary key auto_increment,
-> name varchar(45) not null,
-> username varchar(45) not null,
-> password varchar(45) not null,
-> remark varchar(45)
-> );
Query OK, 0 rows affected (0.01 sec)
mysql> show tables;
+-----------------+
| Tables_in_eleme |
+-----------------+
| t_user |
+-----------------+
1 row in set (0.00 sec)4.添加2行记录（master）
mysql> insert into t_user (id,name,username,password,remark)values(1,"超级管理员","adm"in","admin","超级管理员");
Query OK, 1 row affected (0.01 sec)
mysql> insert into t_user (id,name,username,password,remark)values(2,"普通用户","guest,","guest","普通用户");
Query OK, 1 row affected (0.00 sec)
mysql> select * from t_user;
+----+-----------------+----------+----------+-----------------+
| id | name | username | password | remark |
+----+-----------------+----------+----------+-----------------+
| 1 | 超级管理员 | admin | admin | 超级管理员 |
| 2 | 普通用户 | guest | guest | 普通用户 |
+----+-----------------+----------+----------+-----------------+
2 rows in set (0.00 sec)
5.远程登录工具查看表数据：
6.使用mycat为三台数据库设置负载均衡（读写分离）
（1）前期环境部署
[root@mycat ~]# ls
anaconda-ks.cfg Mycat-server-1.6.5-release-20180122220033-linux.tar.gz
jdk-8u192-linux-x64.tar.gz
[root@mycat ~]# tar -xf jdk-8u192-linux-x64.tar.gz
[root@mycat ~]# tar -xf Mycat-server-1.6.5-release-20180122220033-linux.tar.gz
[root@mycat ~]# cp -r jdk1.8.0_192/ /usr/local/jdk
[root@mycat ~]# cp -r mycat/ /usr/local/mycat
[root@mycat ~]# sed -i '$aexport JAVA_HOME=/usr/local/jdk' /etc/profile
[root@mycat ~]# source /etc/profile
[root@mycat ~]# sed -i '$aexport PATH=$PATH:$JAVA_HOME/bin' /etc/profile
[root@mycat ~]# source /etc/profile
[root@mycat ~]# javac -version
javac 1.8.0_192
[root@mycat ~]# /usr/local/mycat/bin/mycat console（2）修改server.xml配置文件
[root@mycat ~]# vim /usr/local/mycat/conf/server.xml
93 <user name="haha" defaultAccount="true">
94 <property name="password">haha</property>
95 <property name="schemas">eleme</property>
# 注释
107 <!--
108 <user name="user">
109 <property name="password">user</property>
110 <property name="schemas">TESTDB</property>
111 <property name="readOnly">true</property>
112 </user>
113 -->
（3）修改schema.xml 配置文件
1.设置schema标签 添加dataNode="xxx" name=eleme
2.修改dataHost标签
[root@mycat ~]# vim /usr/local/mycat/conf/schema.xml
1 <?xml version="1.0"?>
2 <!DOCTYPE mycat:schema SYSTEM "schema.dtd">
3 <mycat:schema xmlns:mycat="http://io.mycat/">
4
5 <schema name="eleme" dataNode="dn1" checkSQLschema="false" sqlMaxLimit="10 0">
6 </schema>
7 <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"
8 /> -->
9 <dataNode name="dn1" dataHost="localhost1" database="eleme" />
10 <!-- <dataNode name="dn2" dataHost="localhost1" database="db2" />
11 <dataNode name="dn3" dataHost="localhost1" database="db3" />-->
12 <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" />
13 <dataNode name="jdbc_dn1" dataHost="jdbchost" database="db1" />
14 <dataNode name="jdbc_dn2" dataHost="jdbchost" database="db2" />
15 <dataNode name="jdbc_dn3" dataHost="jdbchost" database="db3" /> -->
16 <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0" 17 writeType="0" dbType="mysql" dbDriver="native" switchTyp e="1" slaveThreshold="100">
18 <heartbeat>select user()</heartbeat>
19 <!-- can have multi write hosts -->
20 <writeHost host="hostM1" url="192.168.2.57:3306" user="haha"
21 password="haha">
22 <!-- can have multi read hosts --> 23 <readHost host="hostS2" url="192.168.2.58:3306" user="haha " password="haha" /> 24 <readHost host="hostS3" url="192.168.2.59:3306" user="haha " password="haha" />
25 </writeHost>
26 <!--
27 <writeHost host="hostS1" url="localhost:3316" user="root"
28 password="123456" />
29 --> 30 <!-- <writeHost host="hostM2" url="localhost:3316" user="root" pas sword="123456"/> -->
31 </dataHost>
（4）启动服务
[root@mycat ~]# /usr/local/mycat/bin/mycat start
Starting Mycat-server...
[root@mycat ~]# netstat -lntup | grep 8066
tcp6 0 0 :::8066 :::* LISTEN 1916/j7.客户端测试mycat
[root@client ~]# cd /usr/local/mysql/bin
[root@client bin]# ./mysql -h192.168.2.19 -P8066 -uhaha -phaha
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 83
Server version: 5.6.29-mycat-1.6.5-release-20180122220033 MyCat Server (OpenCloundDB)
Copyright (c) 2000, 2023, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+----------+
| DATABASE |
+----------+
| eleme |
+----------+
1 row in set (0.01 sec)
mysql> use eleme;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+-----------------+
| Tables_in_eleme |
+-----------------+
| t_user |
+-----------------+
1 row in set (0.01 sec)
mysql> select * from t_user;
+----+-----------------+----------+----------+-----------------+
| id | name | username | password | remark |
+----+-----------------+----------+----------+-----------------+
| 1 | 超级管理员 | admin | admin | 超级管理员 |
| 2 | 普通用户 | guest | guest | 普通用户 |
+----+-----------------+----------+----------+-----------------+
2 rows in set (0.01 sec)
mysql>
8.部署java17环境
（1）java01
[root@java01 ~]# ls
anaconda-ks.cfg jdk-17_linux-x64_bin.tar.gz
[root@java01 ~]# tar -xf jdk-17_linux-x64_bin.tar.gz
[root@java01 ~]# ls
anaconda-ks.cfg jdk-17.0.12 jdk-17_linux-x64_bin.tar.gz
[root@java01 ~]# cp -r jdk-17.0.12/ /usr/local/jdk
[root@java01 ~]# vim /etc/profile
export JAVA_HOME=/usr/local/jdk
export PATH=$PATH:$JAVA_HOME/bin
[root@java01 ~]# source /etc/profile
[root@java01 ~]# javac --version
javac 17.0.12
[root@java01 ~]# firewall-cmd --add-port=8080/tcp --permanent
success
[root@java01 ~]# firewall-cmd --reload
success
[root@java01 ~]# ls
anaconda-ks.cfg application_(1).yml eleme_server-0.0.1-SNAPSHOT.jar jdk-17.0.12 jdk-17_linux-x64_bin.tar.gz
[root@java01 ~]# mv application_\(1\).yml application.yml
[root@java01 ~]# ls
anaconda-ks.cfg application.yml eleme_server-0.0.1-SNAPSHOT.jar jdk-17.0.12 jdk-17_linux-x64_bin.tar.gz
[root@java01 ~]# vim application.yml
server:
port: 8080
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://192.168.2.19:8066/eleme
username: haha
password: haha
[root@java01 ~]# java -jar eleme_server-0.0.1-SNAPSHOT.jar
（2）浏览器访问：192.168.2.11:8080
（3）java02
[root@java02 ~]# ls
anaconda-ks.cfg eleme_server-0.0.1-SNAPSHOT.jar jdk-17_linux-x64_bin.tar.gz
application.yml
[root@java02 ~]# tar -xf jdk-17_linux-x64_bin.tar.gz
[root@java02 ~]# cp -r jdk-17.0.12/ /usr/local/jdk
[root@java02 ~]# vim /etc/profile
[root@java02 ~]# source /etc/profile
[root@java02 ~]# javac -version
javac 17.0.12
[root@java02 ~]# vim application.yml
server:
port: 8080
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://192.168.2.19:8066/eleme
username: haha
password: haha
[root@java02 ~]# java -jar eleme_server-0.0.1-SNAPSHOT.jar
（4）浏览器访问：192.168.2.12:8080
9.部署LVS-nat模式
（1）lvs
[root@lvs ~]# ifconfig ens33:0 192.168.2.150 broadcast 192.168.2.121 netmask 255.255.255.255 up
[root@lvs ~]# route add -host 192.168.2.150 dev ens33:0
[root@lvs ~]# yum -y install ipvsadm
[root@lvs ~]# ipvsadm -C
[root@lvs ~]# ipvsadm -A -t 192.168.2.150:8080 -s rr
[root@lvs ~]# ipvsadm -a -t 192.168.2.150:8080 -r 192.168.2.11 -g
[root@lvs ~]# ipvsadm -a -t 192.168.2.150:8080 -r 192.168.2.12 -g
[root@lvs ~]# systemctl stop firewalld
[root@lvs ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@lvs ~]# setenforce 0
[root@lvs ~]# systemctl stop firewalld
[root@lvs ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.2.150:8080 rr
-> 192.168.2.11:8080 Route 1 0 1
-> 192.168.2.12:8080 Route 1 0 1 （2）java01
[root@java01 ~]# ifconfig lo:0 192.168.2.150 broadcast 192.168.2.150 netmask 255.255.255.255 up
[root@java01 ~]# route add -host 192.168.2.150 dev lo:0
[root@java01 ~]# vim arp.sh
[root@java01 ~]# source arp.sh
（3）java02
[root@java02 ~]# ifconfig lo:0 192.168.2.150 broadcast 192.168.2.150 netmask 255.255.255.255 up
[root@java02 ~]# route add -host 192.168.2.150 dev lo:0
[root@java02 ~]# vim arp.sh
[root@java02 ~]# source arp.sh
（4）浏览器访问：192.168.2.150:8080(外网地址)
