1.环境准备（三个虚拟机都要做）
创建虚拟机并更改环境
vi /etc/selinux/config
重启后下载软件并且同步时间
yum install vim make gcc tree net-tools tar -y
yum update
安装好后
vim /etc/chrony.conf
timedatectl （可以用这个看一下）
三台机子完成后拍快照安装mysql，其中monitor虚拟机不用装
解压缩
tar xvf mysql-8.0.37-linux-glibc2.17-x86_64.tar.xz
cd mysql-8.0.37-linux-glibc2.17-x86_64
改变mysql的安装位置并创建用户（这里可以选择性配置）
软件初始化（root@......那里记得复制密码）
到这里从新打开一个终端（在当前 MobaXterm 的右键菜单中，选择 "Duplicate tab"（复制标签页））
新终端（密码粘贴之前复制的）
修改密码
alter user 'root'@'localhost' identified with mysql_native_password by '123456';
看一下数据库怎么样后关闭
最后一条指令kill -9 进程号中要替换上面自己的进程号（这里写错了应该是39150）
设置mysql的配置文件
vim /etc/my.cnf
client
port = 3306
socket = /tmp/mysql.sock
mysqld
port = 3306
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
tmpdir = /tmp
socket = /tmp/mysql.sock
character-set-server = utf8mb4
collation-server = utf8mb4_general_ci
default-storage-engine=INNODB
log_error = error.log
配置启动脚本
[root@master1 ~]# cd /usr/local/mysql/support-files
root@master1 support-files\]# cp -a mysql.server /etc/init.d/mysql \[root@master1 support-files\]# vim /etc/init.d/mysql  \[root@master1 init.d\]# cd \~ \[root@master1 \~\]# vim \~/.bash_profile  \[root@master1 \~\]# source \~/.bash_profile \[root@master1 \~\]# systemctl daemon-reload # 重载系统配置 \[root@master1 \~\]# systemctl start mysql \[root@master1 \~\]# /usr/lib/systemd/systemd-sysv-install enable mysql # 开机启动 \[root@master1 \~\]# mysql -uroot -p mysql\> update mysql.user set host="%" where user="root"; mysql\> flush privileges; mysql\> exit #### 2.msyql集群搭建 ##### master1节点配置 \[root@master1 \~\]# systemctl stop mysql \[root@master1 \~\]# vim /etc/my.cnf （直接在后面加）  * 创建用于数据同步的账号m1 * \[root@master1 \~\]# systemctl start mysql \[root@master1 \~\]# mysql -uroot -p mysql\> create user 'mback'@'%' identified with mysql_native_password by '123456'; mysql\> grant replication slave on \*.\* to 'mback'@'%'; ##### master2节点配置 基本一样，但是master2节点的server-id=2，不能和master1的server-id相同  剩下都完全一样就行  ##### 建立master1 节点主从关系 ##### 注意：这句在master2上执行  # 日志文件：mysql-bin-log.000001 # 日志数据点： 664 这个在master1 上写 change master to master_host='172.25.254.162',master_user='mback',master_password='123456',master_port=3306,master_log_file='mysql-bin-log.000001',master_log_pos=664; （ip替换成自己的master2ip，日志数据点也改成自己的） start slave; mysql\> show slave status\\G （这个建议稍微等一会再敲，他稍微需要点时间） ##### 建立master2 节点主从关系 master1上  master2上 change master to master_host='172.25.254.161',master_user='mback',master_password='123456',master_port=3306,master_log_file='mysql-bin-log.000001',master_log_pos=664; start slave; mysql\> show slave status\\G  两个必须是yes 检测是否同步（两个虚拟机看一下一不一样）   master1(主)--master2(从)构建完毕 master2  master1  master1(从)--master2(主)构建完毕 #### 3.Keepalived故障转移的高可用环境 ##### master1节点配置 \[root@master1 \~\]# yum install keepalived -y master1节点 \[root@master1 \~\]# vim /etc/keepalived/keepalived.conf  ip地址依然配自己的，网卡也是自己的 \[root@master1 \~\]# vim /etc/keepalived/chk_mysql.sh #!/bin/bash counter=$(netstat -na\|grep "LISTEN"\|grep "3306"\|wc -l) if \[ "${counter}" -eq 0 \]; then killall keepalived fi \[root@master1 \~\]# chmod +x /etc/keepalived/chk_mysql.sh # 设置脚本执行权限 \[root@master1 \~\]# systemctl start keepalived \[root@master1 \~\]# systemctl status keepalived （active running）  看一下成功了吗（注意看网卡那个位置有没有新的）  ##### master2节点配置 ``` [root@master2 ~]# yum install keepalived -y ``` \[root@master2 \~\]# vim /etc/keepalived/keepalived.conf  ``` [root@master2 ~]# vim /etc/keepalived/chk_mysql.sh #!/bin/bash ``` ``` counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l) ``` ``` if [ "${counter}" -eq 0 ]; then ``` ``` killall keepalived ``` ``` fi ```  ##### 局部测试 master1   master2  master1  即使master1恢复后，VIP不会被强占 #### 4.安装监控平台 monitor主机   \[root@monitor mysqld_exporter\]# vim .my.cnf # 注意为隐藏文件 \[client
user = exporter # 该账户需要再2台mysql节点新建
password = 123456 # 登录密码
host = 192.168.88.200 # 使用VIP访问
port = 3306
-
2台mysql节点创建用户并授权
-
master1
master2
monitor节点操作
root@monitor \~\]# vim /usr/lib/systemd/system/mysqld_exporter.service \[Unit
Description=https://prometheus.io
Service
Restart=on-failure
ExecStart=/usr/local/mysqld_exporter/mysqld_exporter --config.my-cnf=/usr/local/mysqld_exporter/.my.cnf --web.listen-address=:9104
Install
WantedBy=multi-user.target
刷新服务配置并启动服务
root@monitor \~\]# systemctl daemon-reload \[root@monitor \~\]# systemctl start mysqld_exporter.service \[root@monitor \~\]# systemctl enable mysqld_exporter.service \[root@monitor \~\]# systemctl status mysqld_exporter.service ##### 5.部署Promethues monitor   \[root@monitor \~\]# vim /usr/lib/systemd/system/prometheus.service  \[root@monitor \~\]# systemctl daemon-reload \[root@monitor \~\]# systemctl enable --now prometheus \[root@monitor \~\]# systemctl status prometheus \[root@monitor \~\]# vim /usr/local/prometheus/prometheus.yml  \[root@monitor \~\]# systemctl restart prometheus ##### 部署Grafana * 下载并解压缩：  \[root@monitor \~\]# tar xvf prometheus-2.53.2.linux-amd64.tar.gz \[root@monitor \~\]# yum install grafana-enterprise-11.1.2-1.x86_64.rpm -y \[root@monitor \~\]# vim /etc/grafana/grafana.ini   到这里结束