CentOS Linux 7.5 编译安装 MySQL 8.0.12 及修改密码问题
CentOS Linux 7.5 编译安装 MySQL 8.0.12 及修改密码问题
CentOS Linux 7.5 编译安装 MySQL 8.0
1、编译安装MySQL8.0
#版本信息
#cat /etc/RedHat-release
CentOS Linux release 7.5.1804 (Core)
#安装依赖包
yum -y install wget cmake gcc gcc-c++ ncurses ncurses-devel libaio-devel openssl openssl-devel
rpm -qa |grep libaio
yum install libaio libaio-devel
#下载源码包
wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-boost-8.0.12.tar.gz
#创建用户和建立数据目录并赋予用户目录权限
groupadd mysql
useradd -r -g mysql -s /sbin/nologin mysql
mkdir -p /usr/local/mysql
mkdir -p /data/mysql
chown -R mysql.mysql /usr/local/mysql
chown -R mysql.mysql /data/mysql
chmod -R 755 /usr/local/mysql/
chmod -R 755 /data/mysql/
#解压并开始安装
tar -zxf mysql-boost-8.0.12.tar.gz
#配置
cd mysql-8.0.12
cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql \
-DMYSQL_DATADIR=/data/mysql \
-DSYSCONFDIR=/etc \
-DMYSQL_TCP_PORT=3306 \
-DWITH_BOOST=~/mysql-8.0.12/boost \
-DDEFAULT_CHARSET=utf8 \
-DDEFAULT_COLLATION=utf8_general_ci \
-DENABLED_LOCAL_INFILE=ON \
-DWITH_INNODB_MEMCACHED=ON \
-DWITH_INNOBASE_STORAGE_ENGINE=1 \
-DWITH_FEDERATED_STORAGE_ENGINE=1 \
-DWITH_BLACKHOLE_STORAGE_ENGINE=1 \
-DWITH_ARCHIVE_STORAGE_ENGINE=1 \
-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1 \
-DWITH_PERFSCHEMA_STORAGE_ENGINE=1
#配置参数说明：
CMAKE_INSTALL_PREFIX ：指定基础安装目录
MYSQL_DATADIR ：指定数据目录
SYSCONFDIR=/etc ：指定配置文件扫描目录
MYSQL_TCP_PORT ：指定端口号
WITH_BOOST ：指定boost所在目录
DEFAULT_CHARSET ：指定默认字符集
DEFAULT_COLLATION ：指定默认排序规则
ENABLED_LOCAL_INFILE=ON ：是否为load data infile启用local
WITH_INNODB_MEMCACHED=ON :是否生成memcached共享库
#编译&安装
make && make install
#初始化数据库
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql
#建立配置文件
cat > /etc/my.cnf <<EOF
[client]
port=3306
socket=/tmp/mysql.sock
default-character-set=utf8
#user=root
#password=123
[mysqld]
server-id=1
#skip-grant-tables
port=3306
user=mysql
max_connections=200
socket=/tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mysql
pid-file=/data/mysql/mysql.pid
init-connect='SET NAMES utf8'
character-set-server=utf8
default-storage-engine=INNODB
log_error=/data/mysql/mysql-error.log
slow_query_log_file=/data/mysql/mysql-slow.log
[mysqldump]
quick
max_allowed_packet=16M
EOF
#配置环境变量
echo "PATH=/usr/local/mysql/bin:$PATH" >> /etc/profile
source /etc/profile
#配置启动脚本
cp ../mysql-8.0.12/support-files/mysql.server /etc/init.d/mysqld
vim /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld
/etc/init.d/mysqld start
#centos7系统自启动脚本
cat /usr/lib/systemd/system/mysqld.service
[Unit]
Description=mysql server daemon
Documentation=man:mysql(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
Type=notify
TimeoutSec=0
PermissionsStartOnly=true
ExecStart=/usr/local/mysql/bin/mysqld $MYSQLD_OPTS
LimitNOFILE = 10000
Restart=always
RestartPreventExitStatus=1
Environment=MYSQLD_PARENT_PID=1
PrivateTmp=false
#启动MySQL
systemctl start mysqld.service
#修改root密码：使用WITH指定认证方式
mysql -uroot
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '你的密码';
ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY '你的密码';
#查看密码字段和加密方式
select host, user, authentication_string, plugin from user;
2、yum存储库安装MySQL
wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
yum localinstall mysql80-community-release-el7-1.noarch.rpm
yum repolist enabled|grep "mysql.*-community.*"
yum repolist all|grep mysql
yum install mysql-community-server
systemctl enable mysqld
systemctl start mysqld
netstat -lntup|grep 3306
#查看随机生成的密码
grep 'temporary password' /var/log/mysqld.log
mysql -uroot -p
#修改密码,密码必须要由大小写字母、数字和特性字符组成
alter user 'root'@'localhost' identified by 'PJY@123.com';
select version();
MySQL 8.0 修改密码问题
MySQL5.7和之前的用户修改密码方式：
mysql -uroot -e "Set password=password(‘123’);"
mysql -uroot -p123.com -e "use mysql;update user set authentication_string=password('456') where user='root';"
update mysql.user set authentication_string=password("123") where user='root';
以上三种方法在MySQL8.0以后版本中将不能使用，如果使用了将会导致在正确修改密码是报如下错误：
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123';
ERROR 1396 (HY000): Operation ALTER USER failed for 'root'@'localhost'
如遇上以上问题请使用update语句先清空authentication_string字段，然后再修改密码即可
update user set authentication_string='' where user='root';
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '你的密码';
所以特别提醒童鞋们：
MySQL8.0后请使用alter修改用户密码，因为在MySQL8.0以后的加密方式为caching_sha2_password，如果使用update修改密码会给user表中root用户的authentication_string字段下设置newpassowrd值，当再使用alter user 'root'@'localhost' identified by 'newpassword'修改密码时会一直报错，必须清空后再修改，因为authentication_string字段下只能是MySQL加密后的43位字符串密码，其他的会报格式错误，所以在MySQL8.0以后能修改密码的方法只能是：ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '你的密码';
linuxboy的RSS地址：https://www.linuxboy.net/rssFeed.aspx
本文永久更新链接地址：https://www.linuxboy.net/Linux/2019-02/157124.htm
评论暂时关闭