环境准备:
机器配置:
mysql8单机安装
1、二进制安装:
2、编辑配置文件:
3、初始化数据库:
4、配置环境变量:
5、制作启动文件:
6、用初始密码进入mysql,修改初始密码:
7、一些问题及解决办法
环境准备:
操作系统:centos7.3
mysql版本:mysql 8.0.26
mha版本:0.58
机器配置
节点ip | 角色 | 机器属性 |
---|---|---|
192.168.100.161 | 主 +MHA node | 虚拟机 |
192.168.100.162 | 主备+MHA node | 虚拟机 |
192.168.100.163 | 从节点+MHA manager+MHA node | 虚拟机 |
192.168.100.166 | vip | 虚拟IP |
mysql8单机安装(三台虚拟机都需要安装)
1、二进制安装:
查看 之前是否安装过mariadb 或者 mysql
rpm -qa | grep mariadb
rpm -pa | grep mysql
如果有则卸载
rpm -e mariadb-libs-5.5.52-1.el7.x86_64 --nodeps
再次检查
rpm -qa | grep mariadb
rpm -pa | grep mysql
下载地址 https://dev.mysql.com/downloads/mysql/
备用地址 http://mirrors.163.com/mysql/Downloads/MySQL-8.0/
mkdir -p /data1/mysql8
cd /data1/mysql8/
上传mysql-8.0.26-linux-glibc2.12-x86_64.tar.xz到/data1/mysql8/下
或者下载:
wget http://mirrors.163.com/mysql/Downloads/MySQL-8.0/mysql-8.0.26-linux-glibc2.12-x86_64.tar.xz
并解压
xz -d mysql-8.0.26-linux-glibc2.12-x86_64.tar.xz
tar -xvf mysql-8.0.26-linux-glibc2.12-x86_64.tar
mv mysql-8.0.26-linux-glibc2.12-x86_64 /usr/local/mysql8
安装epel源
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm /root
cd /root
yum install -y epel-release-latest-7.noarch.rpm
yum repolist
安装依赖
yum -y install perl net-tools
创建用户和用户组
groupadd mysql
useradd -g mysql mysql
创建mysql的数据、日志等数据存储目录
# pwd
/data1/mysql8
# mkdir {data,log,var}
# ll /data1/mysql8
drwxr-xr-x 2 root root 6 2月 7 16:30 data
drwxr-xr-x 2 root root 6 2月 7 16:30 log
drwxr-xr-x 2 root root 6 2月 7 16:30 var
授权
chown -R mysql:mysql /data1/mysql8/
chown -R mysql:mysql /usr/local/mysql8/
# ll /data1/mysql8
drwxr-xr-x 2 mysql mysql 6 2月 7 16:30 data
drwxr-xr-x 2 mysql mysql 6 2月 7 16:30 log
drwxr-xr-x 2 mysql mysql 6 2月 7 16:30 var
# ll /usr/local/mysql8
drwxr-xr-x 2 mysql mysql 4096 2月 8 16:31 bin
drwxr-xr-x 2 mysql mysql 55 7月 1 2021 docs
drwxr-xr-x 3 mysql mysql 282 7月 1 2021 include
drwxr-xr-x 6 mysql mysql 201 7月 1 2021 lib
-rw-r--r-- 1 mysql mysql 276551 7月 1 2021 LICENSE
drwxr-xr-x 4 mysql mysql 30 7月 1 2021 man
-rw-r--r-- 1 mysql mysql 1154 2月 12 19:48 my.cnf
-rw-r--r-- 1 mysql mysql 666 7月 1 2021 README
drwxr-xr-x 28 mysql mysql 4096 7月 1 2021 share
drwxr-xr-x 2 mysql mysql 77 7月 1 2021 support-files
2、编辑配置文件:
- 注意默认可能有/etc/my.cnf存在,备份 cp /etc/my.cnf /etc/my.cnf_back
- 在设置mysql数据库新密码前先不要在配置文件中设置“skip-name-resolve” 否则会报“Host ‘127.0.0.1’ is not allowed to connect to this MySQL server”解决办法就是先暂时注释掉这一条,设置好密码后再删除注释符号。
# pwd
/usr/local/mysql8
# vim my.cnf
配置文件内容如下
[mysql]
default-character-set=utf8mb4
socket=/data1/mysql8/var/mysql.sock
[mysqld]
port=3306
socket=/data1/mysql8/var/mysql.sock
basedir=/usr/local/mysql8
datadir=/data1/mysql8/data
lower_case_table_names=1
server-id=161
log-bin=/data1/mysql8/data/mysql-bin
relay_log=relay_bin
log_slave_updates=on
pid-file=/data1/mysql8/var/mysqld.pid
gtid_mode=on
enforce_gtid_consistency=on
binlog_format=row
skip-name-resolve
character-set-server=utf8mb4
collation-server=utf8mb4_general_ci
character-set-client-handshake=FALSE
#symbolic-links=0 #mysql8默认禁用符号软连接
sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'
max_connections=200
max_connect_errors=1000
max_allowed_packet=200M
default-storage-engine=INNODB
innodb_buffer_pool_size=200M
#explicit_defaults_for_timestamp=1
log-output=FILE
slow_query_log=ON
slow_query_log_file=/data1/mysql8/log/slow.log
long_query_time=5
log-error=/data1/mysql8/log/liandodb_error.log
default-authentication-plugin=mysql_native_password
[client]
port= 3306
default-character-set=utf8mb4
socket=/data1/mysql8/var/mysql.sock
3、初始化数据库:
- 注意:--lower-case-table-names=1
- MySQL8.0 新增了data dictionary的概念,数据初始化的时候在linux下默认使用lower-case-table-names=0的参数,数据库启动的时候读取的my.cnf文件中的值。若二者值不一致则在mysql的错误日志中记录报错信息。在MySQL 5.7之前则允许数据库初始化和启动的值不一致且以启动值为准。在MySQL 官方提供的RPM包中默认是使用lower-case-table-names=0,不太适合生产环境部署。在生产环境建议使用官方的二进制包。
- 解决办法:
在mysql数据库初始化的时候指定不区分大小写,在数据库实例启动的时候也要指定不区分大小写。即数据库初始化时lower_case_table_names的值和数据库启动时的值需要一样。
在实际开发生产的应用中多是不区分大小写的即lower-case-table-names=1。
- 解决办法:
$ mysqld --initialize --lower-case-table-names=1 --user=mysql --basedir=/usr/local/mysql8 --datadir=/data1/mysql8/data
配置文件中添加如下设置
my.cnf
[mysqld]
lower_case_table_names=1
- 数据库初始化
# chown -R mysql:mysql /usr/local/mysql8/
# su mysql
$ mysqld --initialize --lower-case-table-names=1 --user=mysql --basedir=/usr/local/mysql8 --datadir=/data1/mysql8/data
2022-02-11T02:34:38.496424Z 0 [Warning] [MY-010139] [Server] Changed limits: max_open_files: 1024 (requested 8161)
2022-02-11T02:34:38.496443Z 0 [Warning] [MY-010142] [Server] Changed limits: table_open_cache: 431 (requested 4000)
2022-02-11T02:34:38.497125Z 0 [System] [MY-013169] [Server] /usr/local/mysql8/bin/mysqld (mysqld 8.0.26) initializing of server in progress as process 4323
2022-02-11T02:34:38.512414Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-02-11T02:34:42.079092Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-02-11T02:34:44.651608Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1 is enabled for channel mysql_main
2022-02-11T02:34:44.652395Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1.1 is enabled for channel mysql_main
2022-02-11T02:34:44.739567Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: ik5F!uJdei/s
# 执行完后生成mysql默认root用户的密码 root@localhost: ik5F!uJdei/s 之后登录需要用到这里记录下来。
4、配置环境变量:
vim /etc/profile
# MYSQL8_HOME
MYSQL8_HOME=/usr/local/mysql8
export PATH=$PATH:$MYSQL8_HOME/bin
#刷新使环境变量生效
source /etc/profile
5、制作启动文件:
vim /etc/systemd/system/mysql8d.service
[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/usr/local/mysql8/bin/mysqld --defaults-file=/usr/local/mysql8/my.cnf
LimitNOFILE = 65536
LimitNPROC = 65536
保存退出
重新加载service文件
systemctl daemon-reload
设置开机启动
systemctl enable mysql8d
日常启停命令
systemctl start mysql8d.service
systemctl status mysql8d.service
systemctl stop mysql8d.service
6、用初始密码进入mysql,修改初始密码:
mysql -u root -p -h 127.0.0.1
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'pass123';
mysql> flush privileges;
mysql> use mysql;
mysql> select host,user from user where user='root';
+-----------+------+
| host | user |
+-----------+------+
| localhost | root |
+-----------+------+
mysql> update user set host='%',plugin='mysql_native_password' where user='root';
mysql> flush privileges;
mysql> select host,user from user where user='root';
+------+------+
| host | user |
+------+------+
| % | root |
+------+------+
7、一些问题及解决办法
#问题1、密码失效
1、修改my.cnf 在[mysqld]段落下增加 skip-grant-tables=1 #登录时,跳过权限验证
2、update user set authentication_string=MD5('root') where user='root' and Host = 'localhost';
或者update user set authentication_string=SHA1('root') where user='root' and Host = 'localhost';
FLUSH PRIVILEGES;
select host, user, authentication_string, plugin from user;
如果直接执行ALTER USER报错,可以按下面顺序执行
update user set host='%',plugin='mysql_native_password',authentication_string='' where user='root';
FLUSH PRIVILEGES;
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
#问题2、 Starting MySQL.2021-02-05T01:43:59.542284Z mysqld_safe Directory '/var/lib/mysql' for UNIX socket file don't exists.
解决:mkdir /var/lib/mysql
#问题3、Starting MySQL... ERROR! The server quit without updating PID file (/data1/mysql8/data/CT-DevOps-DB.pid).
解决查看错误日志:Could not create unix socket lock file /var/lib/mysql/mysql.sock.lock.
这个是权限不足导致,设置权限 chown -R mysql:mysql /var/lib/mysql/
grant all privileges on *.* to 'root'@'%' ;
# 问题4、navicate连接不上
解决:添加需要监听的端口/sbin/iptables -I INPUT -p tcp --dport 3307 -j ACCEPT
iptables-save > /etc/sysconfig/iptables iptables-save是将规则追加到一个文件
文章参考:
原文链接:https://blog.csdn.net/qq_15350581/article/details/114090794
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