官网下载安装包：mysql-8.0.19-linux-glibc2.12-x86_64.tar.xz
安装环境：CentOS Linux release 7.5.1804 (Core)
解压安装包：
xz -d mysql-8.0.19-linux-glibc2.12-x86_64.tar.xz tar -xvf mysql-8.0.19-linux-glibc2.12-x86_64.tar
环境变量：
yum install -y gcc gcc-c++ make cmake automake ncurses-devel bison bison-devel tcp_wrappers-devel libaio libaio-devel perl-Data-Dumper net-tools
创建相关用户和组：
[root@localhost ~]# groupadd mysql
[root@localhost ~]# useradd -g mysql -d /home/mysql -m -p mysql mysql
创建相关目录：
[root@localhost ~]# mkdir -p /data/mysql/;chown -R mysql.mysql /data/mysql/ [root@localhost ~]# mkdir -p /data/tmp/;chown -R mysql.mysql /data/tmp/
编辑配置文件：
[root@localhost tmp]# vim /etc/my.cnf [root@localhost mysql]# cat /etc/my.cnf [client] port= 3306 socket = /tmp/mysql.sock ## The MySQL server [mysqld] port = 3306 socket = /tmp/mysql.sock user = mysql skip-external-locking skip-name-resolve #skip-grant-tables #skip-networking ###################################### dir basedir=/usr/local/mysql datadir=/data/mysql tmpdir=/data/tmp secure_file_priv=/data/tmp ###################################### some app log-error=mysql.err pid-file=/data/mysql/mysql.pid local-infile=1 event_scheduler=0 federated default-storage-engine=InnoDB #default-time-zone= '+8:00' log_timestamps=SYSTEM character-set-client-handshake = FALSE character-set-server = utf8mb4 collation-server = utf8mb4_unicode_ci init_connect='SET NAMES utf8mb4' #fulltext innodb_optimize_fulltext_only ft_min_word_len=1 #ft_max_word_len innodb_ft_min_token_size=1 ###################################### memory allocate and myisam configure max_connections=3000 max_connect_errors=10000 key_buffer_size = 16M max_allowed_packet = 16M table_open_cache = 10240 sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 2M join_buffer_size=2M myisam_sort_buffer_size = 4M #net_buffer_length = 2M thread_cache_size = 24 tmp_table_size=1G max_heap_table_size=1G #thread_concurrency =48 ###################################### replication server-id = 101096 log-bin=mysql-bin binlog_format=mixed max_binlog_size=1G log_slave_updates=true log_bin_trust_function_creators=true binlog_expire_logs_seconds=259200 #binlog过期时间，单位秒 replicate-ignore-db=mysql replicate-ignore-db=test replicate-ignore-db=information_schema replicate-ignore-db=performance_schema replicate-wild-ignore-table=mysql.% replicate-wild-ignore-table=test.% replicate-wild-ignore-table=information_schema.% replicate-wild-ignore-table=performance_schema.% lower_case_table_names = 1 #read_only=1 master_info_repository=TABLE relay_log_info_repository=TABLE ###################################### slow-query long_query_time=1 slow_query_log=1 slow_query_log_file=/data/mysql/slow-query.log interactive_timeout=600 wait_timeout=600 ###################################### innodb configure innodb_file_per_table innodb_data_home_dir = /data/mysql innodb_log_group_home_dir = /data/mysql innodb_buffer_pool_size =4G innodb_log_file_size = 1G innodb_log_files_in_group = 3 innodb_log_buffer_size = 32M innodb_flush_log_at_trx_commit = 1 sync_binlog=0 sql-mode="STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO" ########################################## [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash default-character-set = utf8mb4 prompt=\U \h \R:\m:\s \d> [myisamchk] key_buffer_size = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout
根目录：
[root@localhost ~]# mv mysql-8.0.19-linux-glibc2.12-x86_64 /usr/local/mysql [root@localhost ~]# chown -R mysql.mysql /usr/local/mysql
进行初始化，默认密码为空：
[root@localhost ~]# /usr/local/mysql/bin/mysqld --initialize-insecure --basedir=/usr/local/mysql --datadir=/data/mysql/ --user=mysql
查看日志有没有报错：
[root@localhost ~]# cat /data/mysql/mysql.err 2020-01-20T15:11:46.156633+08:00 0 [System] [MY-013169] [Server] /usr/local/mysql/bin/mysqld (mysqld 8.0.19) initializing of server in progress as process 14822 100 200 300 400 500 600 700 800 900 1000 100 200 300 400 500 600 700 800 900 1000 100 200 300 400 500 600 700 800 900 1000 2020-01-20T15:12:31.118120+08:00 5 [Warning] [MY-010453] [Server] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.
环境变量与开机自启：
[root@localhost mysql]# vim /etc/profile #在最后添加 export MYSQL_HOME=/usr/local/mysql PATH=$PATH:$MYSQL_HOME/bin/
[root@localhost mysql]# source /etc/profile
[root@localhost mysql]# cd /usr/local/mysql
[root@localhost mysql]# cp -f support-files/mysql.server /etc/init.d/mysqld
[root@localhost mysql]# chmod 755 /etc/init.d/mysqld
[root@localhost mysql]# chkconfig --add mysqld
[root@localhost mysql]# chkconfig mysqld on
启动数据库：
[root@localhost mysql]# /etc/init.d/mysqld start
修改密码与创建用户，8.0已取消grant权限自动创建用户，要用create user创建用户再用grant赋予权限：
[root@localhost ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 8 Server version: 8.0.19 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. root@localhost localhost 15:43:29 (none)>ALTER USER 'root'@'localhost' IDENTIFIED BY 'password'; Query OK, 0 rows affected (0.01 sec) root@localhost localhost 15:49:30 (none)>CREATE USER ceshi@'localhost' IDENTIFIED BY 'password'; Query OK, 0 rows affected (0.01 sec) root@localhost localhost 15:50:07 (none)>grant SELECT on *.* to 'ceshi'@'localhost'; Query OK, 0 rows affected, 1 warning (0.00 sec) root@localhost localhost 15:51:10 (none)>show grants for ceshi@localhost; +--------------------------------------------+ | Grants for ceshi@localhost | +--------------------------------------------+ | GRANT SELECT ON *.* TO `ceshi`@`localhost` | +--------------------------------------------+ 1 row in set (0.00 sec)