centos7搭建mysql5.7
ip 192.168.20.181 192.168.20.182
1，先关闭防火墙和selinux
[root@192 ~]# systemctl stop firewalld
[root@192 ~]# setenforce 0
2，查看是否安装mysql如果有则卸载
[root@192 ~]# rpm -qa |grep mysql
3，安装下载工具
[root@192 ~]# yum -y install wget
已加载插件：fastestmirror
Determining fastest mirrors
* base: mirrors.huaweicloud.com
* extras: mirrors.huaweicloud.com
* updates: mirrors.huaweicloud.com
base | 3.6 kB 00:00:00
extras | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
(1/4): base/7/x86_64/group_gz | 153 kB 00:00:00
(2/4): extras/7/x86_64/primary_db | 194 kB 00:00:00
(3/4): updates/7/x86_64/primary_db | 1.3 MB 00:00:00
(4/4): base/7/x86_64/primary_db | 6.1 MB 00:00:02
正在解决依赖关系
--> 正在检查事务
---> 软件包 wget.x86_64.0.1.14-18.el7_6.1 将被 安装
--> 解决依赖关系完成
依赖关系解决
=========================================================================================================================================
Package 架构 版本 源 大小
=========================================================================================================================================
正在安装:
wget x86_64 1.14-18.el7_6.1 base 547 k
事务概要
=========================================================================================================================================
安装 1 软件包
总下载量：547 k
安装大小：2.0 M
Downloading packages:
wget-1.14-18.el7_6.1.x86_64.rpm | 547 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安装 : wget-1.14-18.el7_6.1.x86_64 1/1
验证中 : wget-1.14-18.el7_6.1.x86_64 1/1
已安装:
wget.x86_64 0:1.14-18.el7_6.1
完毕！
4，使用wget下载安装包
wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
[root@192 ~]# wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
--2020-05-22 10:41:17-- https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
正在解析主机 dev.mysql.com (dev.mysql.com)... 137.254.60.11
正在连接 dev.mysql.com (dev.mysql.com)|137.254.60.11|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 302 Found
位置：https://repo.mysql.com//mysql57-community-release-el7-9.noarch.rpm [跟随至新的 URL]
--2020-05-22 10:41:18-- https://repo.mysql.com//mysql57-community-release-el7-9.noarch.rpm
正在解析主机 repo.mysql.com (repo.mysql.com)... 104.75.165.42
正在连接 repo.mysql.com (repo.mysql.com)|104.75.165.42|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：9224 (9.0K) [application/x-redhat-package-manager]
正在保存至: “mysql57-community-release-el7-9.noarch.rpm”
100%[===============================================================================================>] 9,224 --.-K/s 用时 0s
2020-05-22 10:41:21 (270 MB/s) - 已保存 “mysql57-community-release-el7-9.noarch.rpm” [9224/9224])
5，查看下载的包
[root@192 ~]# ll
总用量 16
-rw-r--r--. 1 root root 9224 9月 12 2016 mysql57-community-release-el7-9.noarch.rpm
6，解压安装包
[root@192 ~]# rpm -ivh mysql57-community-release-el7-9.noarch.rpm
警告：mysql57-community-release-el7-9.noarch.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql57-community-release-el7-9 ################################# [100%]
执行完成后会在/etc/yum.repos.d/目录下生成两个repo文件mysql-community.repo mysql-community-source.repo
使用yum命令即可完成安装
注意：必须进入到 /etc/yum.repos.d/目录后再执行以下命令
[root@192 yum.repos.d]# yum -y install mysql mysql-server
已安装:
mysql-community-client.x86_64 0:5.7.30-1.el7 mysql-community-libs.x86_64 0:5.7.30-1.el7
mysql-community-libs-compat.x86_64 0:5.7.30-1.el7 mysql-community-server.x86_64 0:5.7.30-1.el7
作为依赖被安装:
mysql-community-common.x86_64 0:5.7.30-1.el7
作为依赖被升级:
postfix.x86_64 2:2.10.1-9.el7
替代:
mariadb-libs.x86_64 1:5.5.56-2.el7
完毕！
7，修改配置文件
[root@192 yum.repos.d]# vim /etc/my.cnf
[mysqld]
server-id=1
log-bin=mysql-bin
skip-grant-tables
8，启动数据库
[root@192 yum.repos.d]# systemctl restart mysqld
9，进入数据库
[root@192 yum.repos.d]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.30-log MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
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.
10，解决方法
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
mysql> alter user root@'localhost' identified by '123456';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
[root@192 yum.repos.d]# mysql -uroot -p123456
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: 5.7.30-log MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
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> exit
Bye
11，进入数据库授权
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> grant all on *.* to tom@'%' identified by '123';
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000008 | 756 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql> exit
Bye
12，从上面安装数据库同样的操作 把配置文件修改就好了
[root@192 yum.repos.d]# vim /etc/my.cnf
[mysqld]
server-id=2
relay-log=mysql-relay
13，启动数据库
[root@192 yum.repos.d]# systemctl start mysqld
14，在从服务器做同步
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> change master to
-> master_host='192.168.20.181',
-> master_user='tom',
-> master_password='123',
-> master_log_file='mysql-bin.000008',
-> master_log_pos=756;
Query OK, 0 rows affected, 2 warnings (0.02 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
15，查看主从是否同步
mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.20.181
Master_User: tom
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 756
Relay_Log_File: mysql-relay.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000008
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
16，Haproxy安装：
[root@localhost ~]# yum -y install haproxy
17，配置文件路径：/etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
stats socket /var/lib/haproxy/stats
defaults
mode tcp
log global
option dontlognull
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 600
frontend main *:5000
acl url_static path_beg -i /static /images /javascript /stylesheets
acl url_static path_end -i .jpg .gif .png .css .js
use_backend static if url_static
default_backend app
backend static
balance roundrobin
server static 127.0.0.1:4331 check
backend app
balance roundrobin
server app1 127.0.0.1:5001 check
server app2 127.0.0.1:5002 check
server app3 127.0.0.1:5003 check
server app4 127.0.0.1:5004 check
listen stats //配置haproxy状态页（用来查看的页面）
mode http
bind :8888
stats enable
stats hide-version //隐藏haproxy版本号
stats uri /haproxyadmin?stats //一会用于打开状态页的uri
stats realm Haproxy\ Statistics //输入账户密码时的提示文字
stats auth admin:admin //用户名:密码
# MySQL 负载配置
listen proxy-mysql
bind 0.0.0.0:13306 # 监听端口
mode tcp # 模式
balance roundrobin # 负载均衡的方式，轮询（平均）方式
option tcplog # 允许记录tcp 连接的状态和时间
#option mysql-check user haproxy
server MySQL1 192.168.20.181:3306 check weight 1 maxconn 2000
server MySQL2 192.168.20.182:3306 check weight 1 maxconn 2000
option tcpka # 是否允许向server和client发送keepalive
18，启动Haproxy
[root@localhost ~]# systemctl restart haproxy
19，查看是否启动成功
[root@localhost ~]# ps -ef |grep haproxy
root 14961 1 0 10:58 ? 00:00:00 /usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid
haproxy 14963 14961 0 10:58 ? 00:00:00 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds
haproxy 14964 14963 0 10:58 ? 00:00:00 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds
root 14966 14796 0 10:58 pts/2 00:00:00 grep --color=auto haproxy
20，查看负载情况
http://192.168.20.181:8888/haproxyadmin?stats
21，安装 HAProxy 的步骤在 192.168.20.182 上做相同步骤即可。
[root@localhost ~]# yum -y install keepalived
22，配置文件路径：/etc/keepalived/keepalived.conf
! Configuration File for keepalived
#简单的头部，这里主要可以做邮件通知报警等的设置，此处就暂不配置了；
global_defs {
notificationd LVS_DEVEL
}
#预先定义一个脚本，方便后面调用，也可以定义多个，方便选择；
vrrp_script chk_haproxy {
script "/etc/keepalived/chk.sh" #具体脚本路径
interval 2 #脚本循环运行间隔
}
#VRRP虚拟路由冗余协议配置
vrrp_instance VI_1 {
#VI_1 是自定义的名称；
state MASTER #MASTER表示是一台主设备，BACKUP表示为备用设备【我们这里因为设置为开启不抢占，所以都设置为备用】
nopreempt #开启不抢占
interface ens33 #指定VIP需要绑定的物理网卡
virtual_router_id 11 #VRID虚拟路由标识，也叫做分组名称，该组内的设备需要相同
priority 120 #定义这台设备的优先级 1-254；开启了不抢占，所以此处优先级必须高于另一台
advert_int 1 #生存检测时的组播信息发送间隔，组内一致
authentication {
#设置验证信息，组内一致
auth_type PASS #有PASS 和 AH 两种，常用 PASS
auth_pass asd #密码
}
virtual_ipaddress {
192.168.20.180 #指定VIP地址，组内一致，可以设置多个IP
}
track_script {
#使用在这个域中使用预先定义的脚本，上面定义的
chk_haproxy
}
notify_backup "systemctl restart haproxy" #表示当切换到backup状态时,要执行的脚本
notify_fault "systemctl stop haproxy" #故障时执行的脚本
}
23，编写脚本
[root@localhost ~]# vim /etc/keepalived/chk.sh
#!/bin/bash
if [ $(ps -C haproxy --no-header | wc -l) -eq 0 ]; then
systemctl stop keepalived
fi
[root@localhost ~]# chmod 777 /etc/keepalived/chk.sh
24，启动keepalived
[root@localhost ~]# systemctl restart keepalived
[root@localhost ~]# ip addr
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:29:15:37:e3 brd ff:ff:ff:ff:ff:ff
inet 192.168.20.181/24 brd 192.168.117.255 scope global noprefixroute dynamic ens33
valid_lft 1632sec preferred_lft 1632sec
inet 192.168.20.180/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::fdf1:237c:2a96:81c6/64 scope link noprefixroute
valid_lft forever preferred_lft forever
25，安装 Keepalived 的步骤在 192.168.20。182 上做相同步骤即可。
26，手动 kill 掉主机上的 HAProxy，出现了错误信息，在之后又继续新增操作。
[root@localhost ~]# ip addr
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:29:83:3b:07 brd ff:ff:ff:ff:ff:ff
inet 192.168.20.182/24 brd 192.168.117.255 scope global noprefixroute dynamic ens33
valid_lft 1505sec preferred_lft 1505sec
inet 192.168.20.180/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::f6e7:5569:d37:4950/64 scope link noprefixroute
valid_lft forever preferred_lft forever
inet6 fe80::fdf1:237c:2a96:81c6/64 scope link tentative noprefixroute dadfailed
valid_lft forever preferred_lft forever