CentOS8下MySQL 8.0安装部署的解决办法
2022-11-12 09:12:25
内容摘要
这篇文章主要为大家详细介绍了CentOS8下MySQL 8.0安装部署的简单示例，具有一定的参考价值，可以用来参考一下。
感兴趣的小伙伴，下面一起跟随512笔记的小玲来看看吧！
MySQL 8正
文章正文
这篇文章主要为大家详细介绍了CentOS8下MySQL 8.0安装部署的简单示例，具有一定的参考价值，可以用来参考一下。
感兴趣的小伙伴，下面一起跟随数据库教程的小编来看看吧！
MySQL 8正式版8.0.11已发布，官方表示MySQL8要比MySQL 5.7快2倍，还带来了大量的改进和更快的性能！到底谁最牛呢？请看：MySQL 5.7 vs 8.0，哪个性能更牛？
Mysql8.0安装 (YUM方式)
1、首先删除系统默认或之前可能安装的其他版本的mysql
代码如下：
# for i in $(rpm -qa|grep mysql);do rpm -e $i --nodeps;done
# rm -rf /var/lib/mysql && rm -rf /etc/my.cnf
CentOS8下MySQL 8.0安装部署的方法
2、安装Mysql8.0 的yum资源库
代码如下：
mysql80-community-release-el7-1.noarch.rpm
# yum localinstall https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm
CentOS8下MySQL 8.0安装部署的方法
3、安装Mysql8.0
代码如下：
# yum install mysql-community-server
#启动MySQL服务器和MySQL的自动启动
# systemctl start mysqld
# systemctl enable mysqld
# systemctl status mysqld
CentOS8下MySQL 8.0安装部署的方法
代码如下：
[root@localhost opt]# netstat -lantp | grep 3306
tcp6 0 0 :::33060 :::* LISTEN 25431/mysqld
tcp6 0 0 :::3306 :::* LISTEN 25431/mysqld
[root@localhost opt]# ps -aux | grep mysqld
mysql 25431 0.8 17.2 1776932 350232 ? Ssl 16:24 0:01 /usr/sbin/mysqld
root 25672 0.0 0.0 112828 980 pts/1 S+ 16:28 0:00 grep --color=auto mysqld
CentOS8下MySQL 8.0安装部署的方法
登录报错
跳过密码登录，添加skip-grant-tables，然后重启MySQL服务。
代码如下：
[root@localhost opt]# vim /etc/my.cnf
[mysqld]
skip-grant-tables
[root@localhost opt]# systemctl restart mysqld
[root@localhost opt]# mysql
CentOS8下MySQL 8.0安装部署的方法
用sql来修改root的密码
进入到终端当中，敲入 mysql -u root -p 命令然后回车，当需要输入密码时，直接按enter键，便可以不用密码登录到数据库当中
代码如下：
mysql> update user set password=password("你的新密码") where user="root";
或者
mysql> set password for 'username'@'host' = password('newpassword')
mysql> flush privileges;
mysql> quit
CentOS8下MySQL 8.0安装部署的方法
注意
set password for ‘username'@‘host' = password(‘newpassword') 命令修改新的密码。如果在执行该步骤的时候出现ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement 错误。则执行下 flush privileges 命令，再执行该命令即可。
注意：如果在执行该步骤的时候出现ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement 错误。则执行下 flush privileges 命令，再执行该命令即可。
4、使用默认密码初次登录后, 必须要重置密码
代码如下：
查看默认密码, 如下默认密码为"e53xDalx.*dE"
[root@DB-node01 ~]# grep 'temporary password' /var/log/mysqld.log
2019-03-06T01:53:19.897262Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: e53xDalx.*dE
[root@DB-node01 ~]# mysql -pe53xDalx.*dE
............
mysql> select version();
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
CentOS8下MySQL 8.0安装部署的方法
报错提示必须要重置初始密码, 下面开始重置mysql登录密码（注意要切换到mysql数据库，使用use mysql）
代码如下：
mysql> use mysql;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
CentOS8下MySQL 8.0安装部署的方法
这个其实与validate_password_policy的值有关, mysql8.0更改了validate_password_policy相关的配置名称, 这跟Mysql5.7有点不一样了.
代码如下：
mysql> set global validate_password.policy=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password.length=1;
Query OK, 0 rows affected (0.00 sec)
CentOS8下MySQL 8.0安装部署的方法
接着再修改密码
代码如下：
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.05 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.03 sec)
CentOS8下MySQL 8.0安装部署的方法
退出, 重新使用新密码登录mysql
代码如下：
# mysql -p123456
...........
mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.15 |
+-----------+
1 row in set (0.00 sec)
CentOS8下MySQL 8.0安装部署的方法
查看服务端口
代码如下：
mysql> show global variables like 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port | 3306 |
+---------------+-------+
1 row in set (0.01 sec)
CentOS8下MySQL 8.0安装部署的方法
查看mysql连接的授权信息
代码如下：
mysql> select host,user,password from mysql.user;
ERROR 1054 (42S22): Unknown column 'password' in 'field list'
CentOS8下MySQL 8.0安装部署的方法
上面这是mysql5.6及以下版本的查看命令, mysql5.7之后的数据库里mysql.user表里已经没有password这个字段了，password字段改成了authentication_string。
代码如下：
mysql> select host,user,authentication_string from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-----------+------------------+------------------------------------------------------------------------+
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root | $A$005${7J0=4Dc7Jym8eI/FU4jimKWFvkD9XmoAkF1ca5.Un0bc6zgmPtU.0 |
+-----------+------------------+------------------------------------------------------------------------+
4 rows in set (0.00 sec)
CentOS8下MySQL 8.0安装部署的方法
mysql8.0修改用户密码命令
代码如下：
mysql> use mysql;
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
mysql> flush privileges;
CentOS8下MySQL 8.0安装部署的方法
Mysql8.0安装 (二进制方式)
1、首先删除系统默认或之前可能安装的其他版本的mysql
代码如下：
[root@mysql8-node ~]# for i in $(rpm -qa|grep mysql);do rpm -e $i --nodeps;done
[root@mysql8-node ~]# rm -rf /var/lib/mysql && rm -rf /etc/my.cnf
CentOS8下MySQL 8.0安装部署的方法
2、安装需要的软件包
代码如下：
[root@mysql8-node ~]# yum -y install libaio
[root@mysql8-node ~]# yum -y install net-tools
CentOS8下MySQL 8.0安装部署的方法
3、下载并安装Mysql8.0.12
代码如下：
[root@mysql8-node ~]# groupadd mysql
[root@mysql8-node ~]# useradd -g mysql mysql
[root@mysql8-node ~]# cd /usr/local/src/
[root@mysql-node src]# ll
-rw-r--r-- 1 root root 620389228 Aug 22 2018 mysql8.0.12_bin_centos7.tar.gz
[root@mysql-node src]# tar -zvxf mysql8.0.12_bin_centos7.tar.gz
[root@mysql-node src]# mv mysql /usr/local/
[root@mysql-node src]# chown -R mysql.mysql /usr/local/mysql
[root@mysql-node src]# vim /home/mysql/.bash_profile
export PATH=/usr/local/mysql/bin:/usr/local/mysql/lib:$PATH
[root@mysql-node src]# source /home/mysql/.bash_profile
[root@mysql-node src]# echo "PATH=$PATH:/usr/local/mysql/bin" >> /etc/profile
[root@mysql-node src]# source /etc/profile
CentOS8下MySQL 8.0安装部署的方法
4、创建数据目录
代码如下：
[root@mysql-node src]# mkdir -p /data/mysql/{data,log,binlog,conf,tmp}
[root@mysql-node src]# chown -R mysql.mysql /data/mysql
CentOS8下MySQL 8.0安装部署的方法
5、配置mysql
代码如下：
[root@mysql-node src]# su - mysql
[mysql@mysql-node ~]$ vim /data/mysql/conf/my.cnf
[mysqld]
lower_case_table_names = 1
user = mysql
server_id = 1
port = 3306
default-time-zone = '+08:00'
enforce_gtid_consistency = ON
gtid_mode = ON
binlog_checksum = none
default_authentication_plugin = mysql_native_password
datadir = /data/mysql/data
pid-file = /data/mysql/tmp/mysqld.pid
socket = /data/mysql/tmp/mysqld.sock
tmpdir = /data/mysql/tmp/
skip-name-resolve = ON
open_files_limit = 65535
table_open_cache = 2000
#################innodb########################
innodb_data_home_dir = /data/mysql/data
innodb_data_file_path = ibdata1:512M;ibdata2:512M:autoextend
innodb_buffer_pool_size = 12000M
innodb_flush_log_at_trx_commit = 1
innodb_io_capacity = 600
innodb_lock_wait_timeout = 120
innodb_log_buffer_size = 8M
innodb_log_file_size = 200M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 85
innodb_read_io_threads = 8
innodb_write_io_threads = 8
innodb_thread_concurrency = 32
innodb_file_per_table
innodb_rollback_on_timeout
innodb_undo_directory = /data/mysql/data
innodb_log_group_home_dir = /data/mysql/data
###################session###########################
join_buffer_size = 8M
key_buffer_size = 256M
bulk_insert_buffer_size = 8M
max_heap_table_size = 96M
tmp_table_size = 96M
read_buffer_size = 8M
sort_buffer_size = 2M
max_allowed_packet = 64M
read_rnd_buffer_size = 32M
############log set###################
log-error = /data/mysql/log/mysqld.err
log-bin = /data/mysql/binlog/binlog
log_bin_index = /data/mysql/binlog/binlog.index
max_binlog_size = 500M
slow_query_log_file = /data/mysql/log/slow.log
slow_query_log = 1
long_query_time = 10
log_queries_not_using_indexes = ON
log_throttle_queries_not_using_indexes = 10
log_slow_admin_statements = ON
log_output = FILE,TABLE
master_info_file = /data/mysql/binlog/master.info
CentOS8下MySQL 8.0安装部署的方法
6、初始化 (稍等一会儿, 可以到/data/mysql/log/mysqld.err日子里查看初始化过程, 看看有没有error信息)
代码如下：
[mysql@mysql-node ~]$ mysqld --defaults-file=/data/mysql/conf/my.cnf --initialize-insecure --user=mysql
CentOS8下MySQL 8.0安装部署的方法
7、启动mysqld
代码如下：
[mysql@mysql-node ~]$ mysqld_safe --defaults-file=/data/mysql/conf/my.cnf &
[mysql@mysql-node ~]$ lsof -i:3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 24743 mysql 23u IPv6 23132988 0t0 TCP *:mysql (LISTEN)
CentOS8下MySQL 8.0安装部署的方法
8、登录mysql, 重置密码
代码如下：
本地首次使用sock文件登录mysql是不需要密码的
[mysql@mysql-node ~]# mysql -S /data/mysql/tmp/mysqld.sock
.............
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.07 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.03 sec)
mysql> select host,user,authentication_string from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-----------+------------------+------------------------------------------------------------------------+
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+-----------+------------------+------------------------------------------------------------------------+
4 rows in set (0.00 sec)
CentOS8下MySQL 8.0安装部署的方法
退出, 此时密码重置后, 就不能使用sock文件无密码登录了
代码如下：
[root@mysql-node ~]# mysql -S /data/mysql/tmp/mysqld.sock
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
[root@mysql-node ~]# mysql -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
CentOS8下MySQL 8.0安装部署的方法
做sock文件的软链接
代码如下：
[root@mysql-node ~]# ln -s /data/mysql/tmp/mysqld.sock /tmp/mysql.sock
CentOS8下MySQL 8.0安装部署的方法
登录
代码如下：
[root@mysql-node ~]# mysql -p123456
或者
[root@mysql-node ~]# mysql -uroot -S /data/mysql/tmp/mysqld.sock -p123456
.............
mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.12 |
+-----------+
1 row in set (0.00 sec)
#授予用户权限. 必须先要创建用户, 才能授权!!
(创建用户时要带@并指定地址, 则grant授权时的地址就是这个@后面指定的!, 否则grant授权就会报错!)
mysql> create user 'kevin'@'%' identified by '123456';
Query OK, 0 rows affected (0.11 sec)
mysql> grant all privileges on *.* to 'kevin'@'%' with grant option;
Query OK, 0 rows affected (0.21 sec)
mysql> select host,user,authentication_string from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-----------+------------------+------------------------------------------------------------------------+
| % | kevin | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+-----------+------------------+------------------------------------------------------------------------+
5 rows in set (0.00 sec)
mysql> update mysql.user set host='172.16.60.%' where user="kevin";
Query OK, 1 row affected (0.16 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.05 sec)
mysql> select host,user,authentication_string from mysql.user;
+-------------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-------------+------------------+------------------------------------------------------------------------+
| 172.16.60.% | kevin | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+-------------+------------------+------------------------------------------------------------------------+
5 rows in set (0.00 sec)
mysql> create user 'bobo'@'172.16.60.%' identified by '123456';
Query OK, 0 rows affected (0.09 sec)
mysql> grant all privileges on *.* to 'bobo'@'172.16.60.%';
Query OK, 0 rows affected (0.17 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.04 sec)
mysql> select host,user,authentication_string from mysql.user;
+-------------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-------------+------------------+------------------------------------------------------------------------+
| 172.16.60.% | bobo | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| 172.16.60.% | kevin | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+-------------+------------------+------------------------------------------------------------------------+
6 rows in set (0.00 sec)
mysql> show grants for kevin@'172.16.60.%';
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Grants for kevin@172.16.60.% |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, SHUTDOWN, PROCESS, FILE, REFERENCES, INDEX, ALTER, SHOW DATABASES, SUPER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, REPLICATION SLAVE, REPLICATION CLIENT, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER, EVENT, TRIGGER, CREATE TABLESPACE, CREATE ROLE, DROP ROLE ON *.* TO `kevin`@`172.16.60.%` WITH GRANT OPTION |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
CentOS8下MySQL 8.0安装部署的方法
MySQL单机多实例安装配置
通过上面二进制部署可知, 已经起来一个3306端口的MySQL实例, 现在需要再起来两个实例, 分别为3307, 3308. 操作如下:
创建实例的数据目录
代码如下：
[root@mysql-node ~]# mkdir -p /data/mysql3307/{data,log,binlog,conf,tmp}
[root@mysql-node ~]# mkdir -p /data/mysql3308/{data,log,binlog,conf,tmp}
[root@mysql-node ~]# chown -R mysql.mysql /data/mysql3307
[root@mysql-node ~]# chown -R mysql.mysql /data/mysql3308
CentOS8下MySQL 8.0安装部署的方法
配置mysql
代码如下：
[root@mysql-node ~]# cp -r /data/mysql/conf/my.cnf /data/mysql3307/conf/
[root@mysql-node ~]# cp -r /data/mysql/conf/my.cnf /data/mysql3308/conf/
[root@mysql-node ~]# sed -i 's#/data/mysql/#/data/mysql3307/#g' /data/mysql3307/conf/my.cnf
[root@mysql-node ~]# sed -i 's#/data/mysql/#/data/mysql3308/#g' /data/mysql3308/conf/my.cnf
[root@mysql-node ~]# sed -i 's/3306/3307/g' /data/mysql3307/conf/my.cnf
[root@mysql-node ~]# sed -i 's/3306/3308/g' /data/mysql3308/conf/my.cnf
[root@mysql-node ~]# chown -R mysql.mysql /data/mysql*
CentOS8下MySQL 8.0安装部署的方法
进行初始化两个实例
代码如下：
[root@mysql-node ~]# mysqld --defaults-file=/data/mysql3307/conf/my.cnf --initialize-insecure --user=mysql
[root@mysql-node ~]# mysqld --defaults-file=/data/mysql3308/conf/my.cnf --initialize-insecure --user=mysql
CentOS8下MySQL 8.0安装部署的方法
接着启动mysqld
代码如下：
[root@mysql-node ~]# mysqld_safe --defaults-file=/data/mysql3307/conf/my.cnf &
[root@mysql-node ~]# mysqld_safe --defaults-file=/data/mysql3308/conf/my.cnf &
CentOS8下MySQL 8.0安装部署的方法
查看启动是否成功
代码如下：
[root@mysql-node ~]# ps -ef|grep mysql
mysql 23996 1 0 14:37 ? 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql/conf/my.cnf
mysql 24743 23996 0 14:38 ? 00:00:17 /usr/local/mysql/bin/mysqld --defaults-file=/data/mysql/conf/my.cnf --basedir=/usr/local/mysql --datadir=/data/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --log-error=/data/mysql/log/mysqld.err --open-files-limit=65535 --pid-file=/data/mysql/tmp/mysqld.pid --socket=/data/mysql/tmp/mysqld.sock --port=3306
root 30473 23727 0 15:33 pts/0 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql3307/conf/my.cnf
mysql 31191 30473 17 15:33 pts/0 00:00:02 /usr/local/mysql/bin/mysqld --defaults-file=/data/mysql3307/conf/my.cnf --basedir=/usr/local/mysql --datadir=/data/mysql3307/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql3307/log/mysqld.err --open-files-limit=65535 --pid-file=/data/mysql3307/tmp/mysqld.pid --socket=/data/mysql3307/tmp/mysqld.sock --port=3307
root 31254 23727 0 15:33 pts/0 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql3308/conf/my.cnf
mysql 31977 31254 39 15:33 pts/0 00:00:02 /usr/local/mysql/bin/mysqld --defaults-file=/data/mysql3308/conf/my.cnf --basedir=/usr/local/mysql --datadir=/data/mysql3308/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql3308/log/mysqld.err --open-files-limit=65535 --pid-file=/data/mysql3308/tmp/mysqld.pid --socket=/data/mysql3308/tmp/mysqld.sock --port=3308
root 32044 23727 0 15:34 pts/0 00:00:00 grep --color=auto mysql
[root@mysql-node ~]# lsof -i:3307
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 31191 mysql 22u IPv6 23144844 0t0 TCP *:opsession-prxy (LISTEN)
[root@mysql-node ~]# lsof -i:3308
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 31977 mysql 22u IPv6 23145727 0t0 TCP *:tns-server (LISTEN)
[root@mysql-node ~]# lsof -i:3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 24743 mysql 23u IPv6 23132988 0t0 TCP *:mysql (LISTEN)
CentOS8下MySQL 8.0安装部署的方法
登录3307端口实例, 并设置密码
代码如下：
[root@mysql-node ~]# mysql -S /data/mysql3307/tmp/mysqld.sock
............
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.11 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.11 sec)
CentOS8下MySQL 8.0安装部署的方法
退出, 使用新密码登录
代码如下：
[root@mysql-node ~]# mysql -uroot -S /data/mysql3307/tmp/mysqld.sock -p123456
.............
mysql>
CentOS8下MySQL 8.0安装部署的方法
同理, 登录3308端口实例, 并设置密码
代码如下：
[root@mysql-node ~]# mysql -S /data/mysql3308/tmp/mysqld.sock
...........
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.13 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.03 sec)
CentOS8下MySQL 8.0安装部署的方法
退出, 使用新密码登录
代码如下：
[root@mysql-node ~]# mysql -uroot -S /data/mysql3308/tmp/mysqld.sock -p123456
....................
mysql>
CentOS8下MySQL 8.0安装部署的方法
3306, 3307, 3308三个端口实例的启动命令分别为:
代码如下：
mysqld_safe --defaults-file=/data/mysql/conf/my.cnf &
mysqld_safe --defaults-file=/data/mysql3307/conf/my.cnf &
mysqld_safe --defaults-file=/data/mysql3308/conf/my.cnf &
CentOS8下MySQL 8.0安装部署的方法
登录命令分别为:
代码如下：
mysql -uroot -S /data/mysql/tmp/mysqld.sock -p123456
mysql -uroot -S /data/mysql3307/tmp/mysqld.sock -p123456
mysql -uroot -S /data/mysql3308/tmp/mysqld.sock -p123456
CentOS8下MySQL 8.0安装部署的方法
不过为了解决大家平时重复安装的问题，特意将多实例安装方法编辑成脚本了，有需要的读者可以在本公众号后台直接回复 MySQL8 获取多实例安装脚本。
Mysql8.0使用过程中踩过的一些坑
1)创建用户和授权 在mysql8.0创建用户和授权和之前不太一样了，其实严格上来讲，也不能说是不一样, 只能说是更严格, mysql8.0需要先创建用户(创建用户时要带@并指定地址, 则grant授权时的地址就是这个@后面指定的!, 否则grant授权就会报错!)和设置密码,然后才能授权。
代码如下：
mysql> create user 'kevin'@'%' identified by '123456';
Query OK, 0 rows affected (0.04 sec)
mysql> grant all privileges on *.* to 'kevin'@'%' with grant option;
Query OK, 0 rows affected (0.04 sec)
mysql> create user 'bobo'@'%' identified by '123456';
Query OK, 0 rows affected (0.06 sec)
mysql> grant all privileges on *.* to 'bobo'@'%' with grant option;
Query OK, 0 rows affected (0.03 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.04 sec)
mysql> select host,user,authentication_string from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-----------+------------------+------------------------------------------------------------------------+
| % | bobo | $A$005$1VY")q?G6<^X@-6LsXrPt5C0TwlTuvHbaOa3sYF0DKViIGoRPuCF8AzwiFcim1 |
| % | kevin | $A$005$hy`U}ZB#R::rA8W0y2rmwgySqzv0rmR1eTeNDSaXfQPWIsrh7ytbVdi85 |
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root | $A$005$/VO_y^7,]6;2qxggBLmJzhA0Qylu5/AHuRScZ/ykKedgZKh/6krOIzPs2 |
+-----------+------------------+------------------------------------------------------------------------+
CentOS8下MySQL 8.0安装部署的方法
如果还是用Mysql5.7及之前版本的直接授权的方法, 会有报错:
代码如下：
mysql> grant all privileges on *.* to 'shibo'@'%' identified by '123456';
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'identified by '123456'' at line 1
CentOS8下MySQL 8.0安装部署的方法
2)Mysql8.0默认是不能使用root账号进行远程登录的! root账号只能本地登录!
代码如下：
mysql> select host,user,authentication_string from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-----------+------------------+------------------------------------------------------------------------+
| % | bobo | $A$005$1VY")q?G6<^X@-6LsXrPt5C0TwlTuvHbaOa3sYF0DKViIGoRPuCF8AzwiFcim1 |
| % | kevin | $A$005$hy`U}ZB#R::rA8W0y2rmwgySqzv0rmR1eTeNDSaXfQPWIsrh7ytbVdi85 |
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root | $A$005$/VO_y^7,]6;2qxggBLmJzhA0Qylu5/AHuRScZ/ykKedgZKh/6krOIzPs2 |
+-----------+------------------+------------------------------------------------------------------------+
6 rows in set (0.00 sec)
CentOS8下MySQL 8.0安装部署的方法
如果想要远程登录, 则需要进行update更新下root账号的权限
代码如下：
mysql> update mysql.user set host='%' where user="root";
Query OK, 1 row affected (0.10 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.14 sec)
mysql> select host,user,authentication_string from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+
| host | user | authentication_string |
+-----------+------------------+------------------------------------------------------------------------+
| % | bobo | $A$005$1VY")q?G6<^X@-6LsXrPt5C0TwlTuvHbaOa3sYF0DKViIGoRPuCF8AzwiFcim1 |
| % | kevin | $A$005$hy`U}ZB#R::rA8W0y2rmwgySqzv0rmR1eTeNDSaXfQPWIsrh7ytbVdi85 |
| % | root | $A$005$/VO_y^7,]6;2qxggBLmJzhA0Qylu5/AHuRScZ/ykKedgZKh/6krOIzPs2 |
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
+-----------+------------------+------------------------------------------------------------------------+
6 rows in set (0.00 sec)
CentOS8下MySQL 8.0安装部署的方法
这样就能在远程使用root账号登录该mysql8.0的数据库了
修改root账号权限, 允许root账号远程登录后, 用navicat进行mysql的远程连接时，出现了弹窗报错：
出现这个原因是mysql8 之前的版本中加密规则是mysql_native_password, 而在mysql8之后,加密规则是caching_sha2_password, 解决问题方法有两种:
1、一种是升级navicat驱动;
2、一种是把mysql用户登录密码加密规则还原成mysql_native_password; 这里选择第二种方法来解决:
代码如下：
#修改加密规则
mysql> ALTER USER 'root'@'%' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER;
Query OK, 0 rows affected (0.16 sec)
#更新一下用户的密码
mysql> ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
Query OK, 0 rows affected (0.08 sec)
#刷新权限
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.03 sec)
CentOS8下MySQL 8.0安装部署的方法
这样问题就解决了。
1、使用sqlyog链接时会出现2058的异常，此时我们需要修改mysql，命令行登录mysql（与修改密码中登录相同，使用修改后的密码），然后执行下面的命令：mysql > ALTER USER ‘root'@‘localhost' IDENTIFIED WITH mysql_native_password BY ‘password'; 其中password为自己修改的密码。然后SQLyog中重新连接，则可连接成功，OK。
2、如果报错：ERROR 1396 (HY000): Operation ALTER USER failed for ‘root'@‘localhost'则使用下面命令：mysql > ALTER USER ‘root'@'%' IDENTIFIED WITH mysql_native_password BY ‘password';sqlyog链接时出现2058异常
修改默认编码方式 mysql8.0默认编码方式为utf8mb4，因此使用时不需要修改，可使用如下命令查看：
代码如下：
mysql > SHOW VARIABLES WHERE Variable_name LIKE 'character_set_%' OR Variable_name LIKE 'collation%';
CentOS8下MySQL 8.0安装部署的方法
如果需要修改其他编码方式，比如需要修改为utf8mb4，可以使用如下方式：
代码如下：
修改mysql配置文件my.cnf, 找到后请在以下三部分里添加如下内容：
[client]
default-character-set = utf8mb4
[mysql]
default-character-set = utf8mb4
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init_connect='SET NAMES utf8mb4'
CentOS8下MySQL 8.0安装部署的方法
然后重启mysqld服务即可, 其中:
代码如下：
character_set_client (客户端来源数据使用的字符集)
character_set_connection (连接层字符集)
character_set_database (当前选中数据库的默认字符集)
character_set_results (查询结果字符集)
character_set_server (默认的内部操作字符集)
CentOS8下MySQL 8.0安装部署的方法
数据库连接参数中:
代码如下：
characterEncoding=utf8 会被自动识别为utf8mb4，也可以不加这个参数，会自动检测。
而autoReconnect=true 是必须加上的。
CentOS8下MySQL 8.0安装部署的方法
6)部分参数配置查询命令
代码如下：
#查询mysql最大连接数设置
mysql> show global variables like 'max_conn%';
mysql> SELECT @@MAX_CONNECTIONS AS 'Max Connections';
# 查看最大链接数
mysql> show global status like 'Max_used_connections';
# 查看慢查询日志是否开启以及日志位置
mysql> show variables like 'slow_query%';
# 查看慢查询日志超时记录时间
mysql> show variables like 'long_query_time';
# 查看链接创建以及现在正在链接数
mysql> show status like 'Threads%';
# 查看数据库当前链接
mysql> show processlist;
# 查看数据库配置
mysql> show variables like '%quer%';
到此这篇关于CentOS8下MySQL 8.0安装部署的方法的文章就介绍到这了,更多相关MySQL安装部署内容请搜索512笔记以前的文章或继续浏览下面的相关文章希望大家以后多多支持512笔记！
注：关于CentOS8下MySQL 8.0安装部署的简单示例的内容就先介绍到这里，更多相关文章的可以留意
代码注释
作者：喵哥笔记
