来自云龙湖轮廓分明的月亮 发表于 2024-10-20 05:29:28

在centos7.6上摆设MHA架构

1、摆设规划

角色IP主机名server-id功能备注MHA_Manager192.168.6.141mha—管理节点MHA_Node_Master192.168.6.142master10数据节点写MHA_Node_Slave1192.168.6.143slave120数据节点读MHA_Node_Slave2192.168.6.144slave230数据节点读 2、系统和软件版本

系统版本MySQL版本MHA版本CentOS 7.6MySQL-5.7.31mha4mysql-manager-0.57 mha4mysql-node-0.57 3、系统环境初始化

第一步:克隆先前建好的最小化捏造机,也可以新建按下面的步骤
起首启动MASTER,然后在一次启动SLAVE1、SLAVE2以及MHA
第二步:更改计算机的主机名称
# hostnamectl set-hostname master
# su

# hostnamectl set-hostname slave1
# su

# hostnamectl set-hostname slave2
# su

# hostnamectl set-hostname mha
# su
第三步:更改IP地址以及绑定主机名称及IP地址到/etc/hosts文件
# vim /etc/sysconfig/network-scripts/ifcfg-ens33
...
IPADDR=192.168.6.141、IPADDR=192.168.6.142、IPADDR=192.168.6.143、IPADDR=192.168.6.144
...

# systemctl stop NetworkManager
# systemctl disable NetworkManager

# systemctl restart network
使用mobaxterm毗连4台服务器,绑定IP地址与主机名称到/etc/hosts文件中
# vim /etc/hosts
192.168.6.142 master
192.168.6.143 slave1
192.168.6.144 slave2
192.168.6.141 mha
第四步:关闭防火墙与SELinux
# systemctl stop firewalld
# systemctl disable firewalld
# setenforce 0
# sed -i '/SELINUX=enforcing/cSELINUX=disabled' /etc/selinux/config
第五步:配置YUM源
底子源
# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
# yum clean all
# yum makecache
配置epel源
# wget -O /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo
# yum clean all
# yum makecache
配置本地自建仓库的yum源
① 把mha-yum拖入/soft/mha目录
# mkdir -p /soft/mha
把mha-yum拖入/soft/mha目录
② 配置本地yum源,当我们使用yum时,可以自动找到mha-yum这个仓库目录
# vim /etc/yum.repos.d/local.repo

name=mha soft
baseurl=file:///soft/mha/mha-yum
enabled=1
gpgcheck=0
测试MHA依靠软件库的安装
yum -y install perl-DBD-MySQL \
perl-Config-Tiny \
perl-Time-HiRes \
perl-Mail-Sender \
perl-Mail-Sendmail \
perl-MIME-Base32 \
perl-MIME-Charset \
perl-MIME-EncWords \
perl-Params-Classify \
perl-Params-Validate.x86_64 \
perl-Log-Dispatch \
perl-Parallel-ForkManager \
net-tools
第六步:ntpdate时间同步
# ntpdate 182.92.12.11
4、摆设MySQL主从复制环境

数据库安装位置:/usr/local/mysql
数据库的数据目录:/usr/local/mysql/data
套接字文件:/tmp/mysql.sock
端口设置:3306
配置文件位置:/usr/local/mysql/my.cnf(MySQL => 安装目录下 => /etc目录下)
☆ MASTER主服务器

第一步:上传软件到/root目录
第二步:使用脚本安装MySQL软件
# vim mysql.sh
#!/bin/bash
yum install libaio -y
tar -xf mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.31-linux-glibc2.12-x86_64 /usr/local/mysql
useradd -r -s /sbin/nologin mysql
rm -rf /etc/my.cnf
cd /usr/local/mysql
mkdir mysql-files
chown mysql:mysql mysql-files
chmod 750 mysql-files
bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql &> /root/password.txt
bin/mysql_ssl_rsa_setup --datadir=/usr/local/mysql/data
cp support-files/mysql.server /etc/init.d/mysqld
service mysqld start
echo 'export PATH=$PATH:/usr/local/mysql/bin' >> /etc/profile
source /etc/profile

# source mysql.sh
第三步:设置MySQL密码
cat /root/password.txt
# mysql -p
mysql> set password='123';
mysql> flush privileges;
第四步:进行安全初始化,两次no然后yes到底
# mysql_secure_installation
第五步:编写MASTER主机中my.cnf配置文件
# vim /usr/local/mysql/my.cnf

basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/master.err
log-bin=/usr/local/mysql/data/binlog
server-id=10
character_set_server=utf8mb4
gtid-mode=on
log-slave-updates=1
enforce-gtid-consistency

# service mysqld restart

☆ SLAVE1/SLAVE2从服务器

第一步:上传MySQL软件到服务器端
第二步:使用脚本安装MySQL,但是不需要进行初始化
# vim mysql.sh
#!/bin/bash
yum install libaio -y
tar -xf mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz
rm -rf /usr/local/mysql
mv mysql-5.7.31-linux-glibc2.12-x86_64 /usr/local/mysql
useradd -r -s /sbin/nologin mysql
rm -rf /etc/my.cnf
cd /usr/local/mysql
mkdir mysql-files
chown mysql:mysql mysql-files
chmod 750 mysql-files
cp support-files/mysql.server /etc/init.d/mysqld
echo 'export PATH=$PATH:/usr/local/mysql/bin' >> /etc/profile
source /etc/profile

# source mysql.sh
第三步:使用rsync把MASTER服务器中的data数据目录同步到SLAVE1与SLAVE2
MASTER:
# rm -rf /usr/local/mysql/data/auto.cnf
# rsync -av /usr/local/mysql/data root@192.168.6.143:/usr/local/mysql/
# rsync -av /usr/local/mysql/data root@192.168.6.144:/usr/local/mysql/
第四步:给SLAVE1与SLAVE2配置my.cnf文件
SLAVE1:
# vim /usr/local/mysql/my.cnf

basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/slave1.err
log-bin=/usr/local/mysql/data/binlog
relay-log=/usr/local/mysql/data/relaylog
server-id=20
character_set_server=utf8mb4
gtid-mode=on
log-slave-updates=1
enforce-gtid-consistency
skip-slave-start
SLAVE2:
# vim /usr/local/mysql/my.cnf

basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/slave2.err
log-bin=/usr/local/mysql/data/binlog
relay-log=/usr/local/mysql/data/relaylog
server-id=30
character_set_server=utf8mb4
gtid-mode=on
log-slave-updates=1
enforce-gtid-consistency
skip-slave-start
配置完成后,启动MySQL软件
# service mysqld restart
☆ 配置主从数据同步

第一步:在MASTER服务器中创建一个slave同步账号
mysql> create user 'slave'@'192.168.6.%' identified by '123';
mysql> grant replication slave on *.* to 'slave'@'192.168.6.%';
mysql> flush privileges;
第二步:创建一个mha账号(方便后期MHA监控主从同步状态)
mysql> create user 'mha'@'192.168.6.141' identified by '123';
mysql> grant all privileges on *.* to 'mha'@'192.168.6.141';
mysql> flush privileges;
第三步:在SLAVE1与SLAVE2中配置主从数据同步
mysql> change master to master_host='192.168.6.142',master_port=3306,master_user='slave',master_password='123',master_auto_position=1;

mysql> start slave;
mysql> show slave status\G

看到
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
即可
5、MHA软件的安装

㈠ 差别节点安装软件

说明:在所有节点安装 mha-node软件包,在 mha 管理端再安装 mha-manager 软件包
# yum –y install mha4mysql-node-0.57-0.el7.noarch.rpm
# yum –y install mha4mysql-node-0.57-0.el7.noarch.rpm
# yum -y install mha4mysql-node-0.57-0.el7.noarch.rpm
# yum –y install mha4mysql-node-0.57-0.el7.noarch.rpm
rpm -ivh install mha4mysql-node-0.57-0.el7.noarch.rpm

# yum –y install mha4mysql-manager-0.57-0.el7.noarch.rpm
   如果已经提前安装依靠软件,则各人可以使用rpm -ivh直接安装
㈡ 配置ssh互信(免密登录)

说明:

[*]在生产环境中禁止root远程登陆服务器的,所以ssh免密码登陆要在admin用户下进行配置,这是处于安全角度思量出发。
[*]admin用户可以是恣意普通用户
[*]该普通用户用于mha的管理节点远程访问mysql复制组中的所有主机,完成一些其他工作
第一步:在所有机器上创建一个普通账号admin,密码123
# useradd admin
# echo 123|passwd --stdin admin
第二步:配置mha主机到其他主机的admin用户互信
mha端:
# su - admin
$ ssh-keygen -P "" -f ~/.ssh/id_rsa
$ cd .ssh/
$ ls
id_rsaid_rsa.pub
$ mv id_rsa.pub authorized_keys
$ for i in 142 143 144;do scp -r ../.ssh/ 192.168.6.$i:~/;done

测试免密登录:
$ ssh 192.168.6.142
把整个.ssh目录拷贝过去了是因为MHA的互信要求不但仅是MHA免密到MASTER、SLAVE1、SLAVE2,MASTER也要免密到MHA、SLAVE1、SLAVE2…
㈢ 配置admin用户的sudo权限

MASTER主机上:
# vim /etc/sudoers.d/admin
#User_Alias表示具有sudo权限的用户列表; Host_Alias表示主机的列表
User_Alias MYSQL_USERS = admin
#Runas_Alias表示用户以什么身份登录
Runas_Alias MYSQL_RUNAS = root
#Cmnd_Alias表示允许执行命令的列表(命令需要使用完整路径)
Cmnd_Alias MYSQL_CMNDS = /sbin/ifconfig,/sbin/arping
MYSQL_USERS ALL = (MYSQL_RUNAS) NOPASSWD: MYSQL_CMNDS
把这个权限分发给SLAVE1与SLAVE2一份(当故障发生时,从服务器也可以自己设置VIP)
# for i in 143 144;do scp /etc/sudoers.d/admin 192.168.6.$i:/etc/sudoers.d/;done
测试admin用户是否可以挂载VIP(只能在MASTER机器上挂载VIP)
# su - admin
$ sudo /sbin/ifconfig ens33:1 192.168.6.200 broadcast 192.168.6.255 netmask 255.255.255.0
$ sudo /sbin/arping -fqc 5 -w 5 -I ens33 -s 192.168.6.200 -U 192.168.6.142
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:92:42:06 brd ff:ff:ff:ff:ff:ff
    inet 192.168.6.142/24 brd 192.168.6.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet 192.168.6.200/24 brd 192.168.6.255 scope global secondary ens33:1
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe92:4206/64 scope link
       valid_lft forever preferred_lft forever


补充:
arping:用来向局域网内的其它主机发送ARP请求的指令,可以用来测试局域网内的某个IP是否已被使用。

-f:收到第一个响应包后退出。
-q:quite模式,不显示输出。
-c:发送指定的count个ARP REQUEST包后停止。如果指定了-w参数,则会等待相同数量的ARP REPLY包,直到超时为止。
-w:指定一个超时时间,单位为秒,arping在到达指定时间后退出,无论期间发送或接收了多少包。在这种情况下,arping在发送完指定的count(-c)个包后并不会停止,而是等待到超时或发送的count个包都进行了回应后才会退出。
-I:指定设备名,用来发送ARP REQUEST包的网络设备的名称。
-D:重复地址探测模式,用来检测有没有IP地址冲突,如果没有IP冲突则返回0。
-s:设置发送ARP包的IP资源地址
-U:无理由的(强制的)ARP模式去更新别的主机上的ARP CACHE列表中的本机的信息,不需要响应。
-h:显示帮助页。
㈣ 创建mha相干配置文件

MHA服务器:创建工作目录
# mkdir /etc/mha/
# mkdir -p /data/mha/masterha/app1
# chown -R admin. /data/mha
创建mha局部配置文件:
解释标注的修改n根据自己环境修改,除了ip其他默认不改
# vim /etc/mha/app1.conf

# 设置监控用户和密码(修改1)
user=mha
password=123
# 设置复制环境中的复制用户和密码(修改2)
repl_user=slave
repl_password=123
# 设置ssh的登录用户名(修改3)
ssh_user=admin
# 设置监控主库,发送ping包的时间间隔,默认是3秒,尝试三次没有回应的时候自动进行failover
ping_interval=3
# 设置mgr的工作目录
manager_workdir=/data/mha/masterha/app1
# 设置mysql master保存binlog的目录,以便MHA可以找到master的二进制日志(修改4)
master_binlog_dir=/usr/local/mysql/data
# 设置master的pid文件(修改5)
# 在master切换到root
# cd /usr/local/mysql/
# ll data/
# 找到相应的pid
master_pid_file=/usr/local/mysql/data/master.pid
# 设置mysql master在发生切换时保存binlog的目录(在mysql master上创建这个目录)
remote_workdir=/data/mysql/mha
# 设置mgr日志文件(MHA遇到问题,主要看这个日志)
manager_log=/data/mha/masterha/app1/app1-3306.log
# MHA到master的监控之间出现问题,MHA Manager将会尝试从slave1和slave2登录到master上
secondary_check_script=/usr/bin/masterha_secondary_check -s 192.168.6.143 -s 192.168.6.144 --user=admin --port=22 --master_host=192.168.6.142 --master_port=3306
# 设置自动failover时候的切换脚本(故障发生时,自动挂载VIP到SLAVE1或SLAVE2)
master_ip_failover_script="/etc/mha/master_ip_failover.sh 192.168.6.200 1"
# 设置手动切换时候的切换脚本
#master_ip_online_change_script="/etc/mha/master_ip_online_change.sh 192.168.6.200 1"
# 设置故障发生后关闭故障主机脚本
# shutdown_script="/etc/mha/power_manager"

hostname=192.168.6.142
port= 3306
candidate_master=1

hostname=192.168.6.143
port= 3306
candidate_master=1

hostname=192.168.6.144
port= 3306
candidate_master=1
㈤ 上传相应脚本到/etc/mha目录,然后更改配置信息,授权

将master_ip_failover.sh拖到/etc/mha
# ls /etc/mha/
app1.confmaster_ip_failover.sh

注意:脚本内容中要修改网卡名字和连接用户为admin
my $vip= shift;
my $interface = 'ens33';                网卡名(38行)
my $key = shift;
...
sub stop_vip() {
    my $ssh_user = "admin";                用户名(110行)
    print "=======$ssh_stop_vip==================\n";
    `ssh $ssh_user\@$orig_master_host \" $ssh_stop_vip \"`;
}

# chmod +x /etc/mha/master_ip_*
6、检测SSH互信以及MySQL主从状态

MHA:
# su - admin
# 检测SSH互信
$ $ masterha_check_ssh --conf=/etc/mha/app1.conf
Tue Jul 16 16:16:54 2024 - Global configuration file /etc/masterha_default.cnf not found. Skipping.
Tue Jul 16 16:16:54 2024 - Reading application default configuration from /etc/mha/app1.conf..
Tue Jul 16 16:16:54 2024 - Reading server configuration from /etc/mha/app1.conf..
Tue Jul 16 16:16:54 2024 - Starting SSH connection tests..
Tue Jul 16 16:16:55 2024 -
Tue Jul 16 16:16:54 2024 - Connecting via SSH from admin@192.168.6.142(192.168.6.142:22) to admin@192.168.6.143(192.168.6.143:22)..
Warning: Permanently added '192.168.6.143' (ECDSA) to the list of known hosts.
Tue Jul 16 16:16:55 2024 -    ok.
Tue Jul 16 16:16:55 2024 - Connecting via SSH from admin@192.168.6.142(192.168.6.142:22) to admin@192.168.6.144(192.168.6.144:22)..
Warning: Permanently added '192.168.6.144' (ECDSA) to the list of known hosts.
Tue Jul 16 16:16:55 2024 -    ok.
Tue Jul 16 16:16:55 2024 -
Tue Jul 16 16:16:55 2024 - Connecting via SSH from admin@192.168.6.143(192.168.6.143:22) to admin@192.168.6.142(192.168.6.142:22)..
Tue Jul 16 16:16:55 2024 -    ok.
Tue Jul 16 16:16:55 2024 - Connecting via SSH from admin@192.168.6.143(192.168.6.143:22) to admin@192.168.6.144(192.168.6.144:22)..
Warning: Permanently added '192.168.6.144' (ECDSA) to the list of known hosts.
Tue Jul 16 16:16:55 2024 -    ok.
Tue Jul 16 16:16:56 2024 -
Tue Jul 16 16:16:55 2024 - Connecting via SSH from admin@192.168.6.144(192.168.6.144:22) to admin@192.168.6.142(192.168.6.142:22)..
Tue Jul 16 16:16:56 2024 -    ok.
Tue Jul 16 16:16:56 2024 - Connecting via SSH from admin@192.168.6.144(192.168.6.144:22) to admin@192.168.6.143(192.168.6.143:22)..
Tue Jul 16 16:16:56 2024 -    ok.
Tue Jul 16 16:16:56 2024 - All SSH connection tests passed successfully.




# 检测集群状态
$ masterha_check_repl --conf=/etc/mha/app1.conf
Tue Jul 16 16:17:14 2024 - Global configuration file /etc/masterha_default.cnf not found. Skipping.
Tue Jul 16 16:17:14 2024 - Reading application default configuration from /etc/mha/app1.conf..
Tue Jul 16 16:17:14 2024 - Reading server configuration from /etc/mha/app1.conf..
Tue Jul 16 16:17:14 2024 - MHA::MasterMonitor version 0.57.
Tue Jul 16 16:17:15 2024 - GTID failover mode = 1
Tue Jul 16 16:17:15 2024 - Dead Servers:
Tue Jul 16 16:17:15 2024 - Alive Servers:
Tue Jul 16 16:17:15 2024 -    192.168.6.142(192.168.6.142:3306)
Tue Jul 16 16:17:15 2024 -    192.168.6.143(192.168.6.143:3306)
Tue Jul 16 16:17:15 2024 -    192.168.6.144(192.168.6.144:3306)
Tue Jul 16 16:17:15 2024 - Alive Slaves:
Tue Jul 16 16:17:15 2024 -    192.168.6.143(192.168.6.143:3306)Version=5.7.31-log (oldest major version between slaves) log-bin:enabled
Tue Jul 16 16:17:15 2024 -    GTID ON
Tue Jul 16 16:17:15 2024 -    Replicating from 192.168.6.142(192.168.6.142:3306)
Tue Jul 16 16:17:15 2024 -    Primary candidate for the new Master (candidate_master is set)
Tue Jul 16 16:17:15 2024 -    192.168.6.144(192.168.6.144:3306)Version=5.7.31-log (oldest major version between slaves) log-bin:enabled
Tue Jul 16 16:17:15 2024 -    GTID ON
Tue Jul 16 16:17:15 2024 -    Replicating from 192.168.6.142(192.168.6.142:3306)
Tue Jul 16 16:17:15 2024 -    Primary candidate for the new Master (candidate_master is set)
Tue Jul 16 16:17:15 2024 - Current Alive Master: 192.168.6.142(192.168.6.142:3306)
Tue Jul 16 16:17:15 2024 - Checking slave configurations..
Tue Jul 16 16:17:15 2024 - read_only=1 is not set on slave 192.168.6.143(192.168.6.143:3306).
Tue Jul 16 16:17:15 2024 - read_only=1 is not set on slave 192.168.6.144(192.168.6.144:3306).
Tue Jul 16 16:17:15 2024 - Checking replication filtering settings..
Tue Jul 16 16:17:15 2024 - binlog_do_db= , binlog_ignore_db=
Tue Jul 16 16:17:15 2024 - Replication filtering check ok.
Tue Jul 16 16:17:15 2024 - GTID (with auto-pos) is supported. Skipping all SSH and Node package checking.
Tue Jul 16 16:17:15 2024 - Checking SSH publickey authentication settings on the current master..
Tue Jul 16 16:17:15 2024 - HealthCheck: SSH to 192.168.6.142 is reachable.
Tue Jul 16 16:17:15 2024 -
192.168.6.142(192.168.6.142:3306) (current master)
+--192.168.6.143(192.168.6.143:3306)
+--192.168.6.144(192.168.6.144:3306)

Tue Jul 16 16:17:15 2024 - Checking replication health on 192.168.6.143..
Tue Jul 16 16:17:15 2024 - ok.
Tue Jul 16 16:17:15 2024 - Checking replication health on 192.168.6.144..
Tue Jul 16 16:17:15 2024 - ok.
Tue Jul 16 16:17:15 2024 - Checking master_ip_failover_script status:
Tue Jul 16 16:17:15 2024 -    /etc/mha/master_ip_failover.sh 192.168.6.200 1 --command=status --ssh_user=admin --orig_master_host=192.168.6.142 --orig_master_ip=192.168.6.142 --orig_master_port=3306
Checking the Status of the script.. OK
Tue Jul 16 16:17:15 2024 - OK.
Tue Jul 16 16:17:15 2024 - shutdown_script is not defined.
Tue Jul 16 16:17:15 2024 - Got exit code 0 (Not master dead).

MySQL Replication Health is OK.
7、查抄MHA状态,然后运行MHA(监控开始)

MHA:
$ masterha_check_status --conf=/etc/mha/app1.conf
app1 is stopped(2:NOT_RUNNING).

开启MHA Manager监控(关键,代表启动MHA):
$ nohup masterha_manager --conf=/etc/mha/app1.conf --remove_dead_master_conf --ignore_last_failover &

再次查看监控状态:
$ masterha_check_status --conf=/etc/mha/app1.conf
app1 (pid:2357) is running(0:PING_OK), master:192.168.6.142


注意:
1. 如果正常,会显示”PING_OK ”,否则会显示”NOT_RUNNING ”,说明 MHA监控没有开启
2. 使用admin用户启动监控,否则会报权限拒绝
3. 手动停止监控命令:masterha_stop --conf=/etc/mha/app1.conf
到此MHA配置完毕
自动Failover测试

1、在MASTER服务器安装测试工具

# yum -y install sysbench
2、插入测试数据

master服务器上创建测试库test
mysql> create database test charset utf8mb4;
Query OK, 1 row affected (0.17 sec)

mysql> grant all on *.* to 'mha'@'localhost' identified by '123';
Query OK, 0 rows affected (0.14 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.11 sec)

mysql> exit
Bye



# sysbench /usr/share/sysbench/oltp_read_only.lua \
--mysql-host=192.168.6.142--mysql-port=3306--mysql-user=mha \
--mysql-password=123--mysql-socket=/tmp/mysql.sock \
--mysql-db=test--db-driver=mysql--tables=1 \
--table-size=100000 --report-interval=10 --threads=128 --time=120 prepare

mysql> use test;
mysql> select count(*) from sbtest1;
+----------+
| count(*) |
+----------+
|   100000 |
+----------+
1 row in set (0.01 sec)
3、拍摄快照

MHA、MASTER、SLAVE1、SLAVE2
4、模拟MASTER服务器故障

MHA服务器:监控日志
# tail -f /data/mha/masterha/app1/app1-3306.log
MASTER服务器:
# service mysqld stop
MHA日志显示结果:
故障切换:
https://i-blog.csdnimg.cn/direct/092eb1246615471f803f3fe94339770a.png#pic_center

VIP漂移:
https://i-blog.csdnimg.cn/direct/9c6f69e6a33d447787e4443fd1c898db.png#pic_center

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