环境
Os:ubuntu 18.04 desktop桌面版
mysql:mysql:8.0.41 glibc2.17
查看操作系统信息
root@db:~# ldd --version
ldd (Ubuntu GLIBC 2.27-3ubuntu1) 2.27
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.root@db:~# uname -a
Linux db 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
root@db:~# cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic
root@db:~#
1.介质准备
mysql-8.0.41-linux-glibc2.17-x86_64.tar.xz
该介质可以从官网上进行下载
2.创建mysql用户和用户组(系统已经自动创建了的话，不需要创建)
root@db:/soft# groupadd mysql
root@db:/soft# useradd mysql -s /sbin/nologin -M -g mysql
3.创建安装目录
[root@localhost soft]# mkdir -p /home/middle
3.下载解压二进制文件,解压,进入解压出来的文件
root@db:/soft# cd /soft
root@db:/soft# tar -xvf mysql-8.0.41-linux-glibc2.17-x86_64.tar.xz
root@db:/soft# mv mysql-8.0.41-linux-glibc2.17-x86_64 /home/middle/mysql8
4.在mysql主目录下建立相应的目录
data目录存放数据文件,conf目录存放配置文件
[root@localhost mysql833]#cd /home/middle/mysql8
[root@localhost mysql833]#mkdir data ##数据文件目录
[root@localhost mysql833]#mkdir conf ## 配置文件目录
[root@localhost mysql833]#mkdir -p mysqllog/relaylog ##主从环境relaylog
[root@localhost mysql833]#mkdir -p mysqllog/logfile ##错误日志文件
[root@localhost mysql833]#mkdir -p mysqllog/binlog ##binlog文件
[root@localhost mysql833]#mkdir -p secure_file ##secure_file_priv参数指定路
5.在conf目录下创建配置文件my.cnf,配置文件内容如下
root@db:/home/middle/mysql8/conf# more my.cnf
[mysqld]
port=13306
server-id=1
basedir=/home/middle/mysql8
datadir=/home/middle/mysql8/data
max_connections = 5000
character_set_server=utf8mb4
collation-server=utf8mb4_general_ci
init_connect='SET collation_connection = utf8mb4_general_ci'
init_connect='SET NAMES utf8mb4'
interactive_timeout=86400
wait_timeout=86400
skip-external-locking
key_buffer_size= 128M
max_allowed_packet=32M
##query_cache_size=32M
read_buffer_size=2M
sort_buffer_size=1M
join_buffer_size= 128M
innodb_file_per_table= 1
innodb_open_files= 5000
innodb_buffer_pool_size= 4G
innodb_write_io_threads= 16
innodb_read_io_threads= 16
innodb_thread_concurrency = 0
innodb_purge_threads= 1
innodb_flush_log_at_trx_commit= 2
innodb_log_buffer_size=16M
##准备废弃innodb_log_file_size和innodb_log_files_in_group,使用innodb_redo_log_capacity代替
##innodb_log_file_size=512M
##innodb_log_files_in_group= 5
innodb_redo_log_capacity = 2GB
innodb_max_dirty_pages_pct= 90
innodb_lock_wait_timeout= 120
bulk_insert_buffer_size= 64M
myisam_sort_buffer_size=64M
myisam_max_sort_file_size= 1G
##myisam_repair_threads= 1
log_bin_trust_function_creators=1
event_scheduler=1
max_binlog_size=100M
binlog_format=row
log-bin=/home/middle/mysql8/mysqllog/binlog/binlog.bin
slow_query_log=on
slow_query_log_file=/home/middle/mysql8/mysqllog/logfile/slow-query.log
long_query_time=1
log_queries_not_using_indexes=on
log-error=/home/middle/mysql8/mysqllog/logfile/mysql-err.log
binlog_cache_size=4MB
##skip-host-cache
skip-name-resolve
##已经没有该参数了expire_logs_days=7
##7*24*60*60=604800 7天
binlog_expire_logs_seconds=604800
##skip_replica_start
##skip-slave-start
skip_replica_start
relay-log-index=/home/middle/mysql8/mysqllog/relaylog/slave-relay-bin.index
relay-log=/home/middle/mysql8/mysqllog/relaylog/relaylog-binlog
replicate-ignore-db=information_schema,performance_schema,sys
replica_net_timeout=60
early-plugin-load=""
explicit_defaults_for_timestamp=true
log_replica_updates=1
##log_slave_updates=1
gtid_mode=ON
enforce_gtid_consistency = ON
lower_case_table_names=1
sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO'
secure_file_priv=/home/middle/mysql8/secure_file
##default_authentication_plugin=mysql_native_password
authentication_policy=mysql_native_password[client]
port = 13306
default-character-set = utf8mb4[mysqldump]
quick
max_allowed_packet = 32M
[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M
6.修改mysql目录权限
[root@localhost opt]#cd /home/middle
[root@localhost opt]# chown -R mysql:mysql ./mysql8
7.初始化数据库
root@db:/home/middle/mysql8/bin# ./mysqld --initialize --lower-case-table-names=1 --user=mysql --basedir=/home/middle/mysql8 --datadir=/home/middle/mysql8/data
./mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
解决办法:
apt-get install libaio-dev
8.启动
[root@localhost opt]#echo>/home/middle/mysql8/mysqllog/logfile/mysql-err.log
[root@localhost opt]#cd /home/middle
[root@localhost opt]#chown -R mysql:mysql ./mysql8
[root@localhost middle]# /home/middle/mysql8/bin/mysqld_safe --defaults-file=/home/middle/mysql8/conf/my.cnf --user=mysql &
9.登陆mysql并修改密码
root@db:/home/middle# /home/middle/mysql8/bin/mysql -h localhost -uroot -P13306 -p
/home/middle/mysql8/bin/mysql: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory
mysql> alter user 'root'@'localhost' identified by 'mysql';
Query OK, 0 rows affected, 1 warning (0.05 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.05 sec)
10.重启
停掉
su - root
/home/middle/mysql8/bin/mysqladmin -h localhost -uroot -P13306 -pmysql shutdown
启动
/home/middle/mysql8/bin/mysqld_safe --defaults-file=/home/middle/mysql8/conf/my.cnf --user=mysql &
11.正常登录
/home/middle/mysql8/bin/mysql -h localhost -uroot -P13306 -p
创建数据库
mysql> create database db_test;
Query OK, 1 row affected (0.02 sec)
创建开发用户
create user 'hxl'@'%' identified by 'mysql';
grant all privileges on db_test.* to 'hxl'@'%' with grant option;
查看mysql新建用户的加密方式
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -ADatabase changed
mysql> select host,user,plugin from user;
+-----------+------------------+-----------------------+
| host | user | plugin |
+-----------+------------------+-----------------------+
| % | hxl | mysql_native_password |
| localhost | mysql.infoschema | caching_sha2_password |
| localhost | mysql.session | caching_sha2_password |
| localhost | mysql.sys | caching_sha2_password |
| localhost | root | caching_sha2_password |
+-----------+------------------+-----------------------+
5 rows in set (0.00 sec)
12.停掉数据库
方便后面使用系统命令启动
/home/middle/mysql8/bin/mysqladmin -h localhost -uroot -P13306 -pmysql shutdown
13.设置开启自启动
设置开机自启动
在/etc/systemd/system目录下创建 mysql.service 文件
root下操作
vi /etc/systemd/system/mysql.service
[Unit]
Description=mysql
[Service]
User=mysql
LimitNOFILE=100000
LimitNPROC=100000
ExecStart=/home/middle/mysql8/bin/mysqld_safe --defaults-file=/home/middle/mysql8/conf/my.cnf
[Install]
WantedBy=multi-user.target
注意如下两个参数不能设置太小，否则mysql会不停重启动
LimitNOFILE=100000
LimitNPROC=100000
设置开机自启
systemctl enable mysql
systemctl daemon-reload
尝试启动
systemctl start mysql
systemctl status mysql
systemctl stop mysql
systemctl status mysql
可以的话进行系统reboot,看是否会自动启动
##########################安装xtrabackup##############################
使用 percona-xtrabackup-8.0.35-31-Linux-x86_64.glibc2.17.tar.gz
说明:8.0.35-31 之后已经没有了glibc2.17版本,直接到了glibc2.28版本
cd /soft
tar -xvf percona-xtrabackup-8.0.35-31-Linux-x86_64.glibc2.17.tar.gz
mv percona-xtrabackup-8.0.35-31-Linux-x86_64.glibc2.17 /opt/xtrabackup-8.0.35-31
备份
root@db:/soft# /opt/xtrabackup-8.0.35-31/bin/xtrabackup --defaults-file=/home/middle/mysql8/conf/my.cnf --user=root --password=mysql -P13306 --socket=/tmp/mysql.sock --no-version-check --compress-threads=4 --backup --stream=xbstream --parallel=4 | gzip > /tmp/mybak20250910.xb.gz
/opt/xtrabackup-8.0.35-31/bin/xtrabackup: error while loading shared libraries: libssl.so.10: cannot open shared object file: No such file or directory
解决办法:
参考如下连接：
https://www.cnblogs.com/hxlasky/p/19087915