下载源码包
wget https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.15-linux-glibc2.12-x86_64.tar.xz
xz -d mysql-8.0.15-linux-glibc2.12-x86_64.tar.xz
tar xf mysql-8.0.15-linux-glibc2.12-x86_64.tar
mv mysql-8.0.15-linux-glibc2.12-x86_64 /usr/local/mysql
进入mysql目录
cd /usr/local/mysql
创建用于登录mysql的用户
adduser mysql
创建3个文件夹，data日志存储目录，sql_log日志存储目录，undo目录
mkdir data sql_log undo
将文件夹权限赋给mysql用户
chown mysql:mysql -R data/ sql_log/ undo/
配置mysql信息
vi /etc/my.cnf
将内容全部删除，替换成以下内容
[client]
port = 3306
socket = /usr/local/mysql/data/mysql.sock
[mysqld]
# Skip #
skip_name_resolve = 1
skip_external_locking = 1
skip_symbolic_links = 1
# GENERAL #
user = mysql
default_storage_engine = InnoDB
character-set-server = utf8
socket = /usr/local/mysql/data/mysql.sock
pid_file = /usr/local/mysql/data/mysqld.pid
basedir = /usr/local/mysql
port = 3306
bind-address = 0.0.0.0
explicit_defaults_for_timestamp = off
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#read_only=on
# MyISAM #
key_buffer_size = 32M
#myisam_recover = FORCE,BACKUP
# undo log #
innodb_undo_directory = /usr/local/mysql/undo
innodb_undo_tablespaces = 8
# SAFETY #
max_allowed_packet = 100M
max_connect_errors = 1000000
sysdate_is_now = 1
#innodb = FORCE
#innodb_strict_mode = 1
secure-file-priv='/tmp'
default_authentication_plugin='mysql_native_password'
# Replice #
server-id = 1001
relay_log = mysqld-relay-bin
gtid_mode = on
enforce-gtid-consistency
log-slave-updates = on
master_info_repository =TABLE
relay_log_info_repository =TABLE
# DATA STORAGE #
datadir = /usr/local/mysql/data/
tmpdir = /tmp
# BINARY LOGGING #
log_bin = /usr/local/mysql/sql_log/mysql-bin
max_binlog_size = 1000M
binlog_format = row
binlog_expire_logs_seconds=86400
# sync_binlog = 1
# CACHES AND LIMITS #
tmp_table_size = 32M
max_heap_table_size = 32M
max_connections = 4000
thread_cache_size = 2048
open_files_limit = 65535
table_definition_cache = 4096
table_open_cache = 4096
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 2M
# thread_concurrency = 24
join_buffer_size = 1M
# table_cache = 32768
thread_stack = 512k
max_length_for_sort_data = 16k
# INNODB #
innodb_flush_method = O_DIRECT
innodb_log_buffer_size = 16M
innodb_flush_log_at_trx_commit = 2
innodb_file_per_table = 1
innodb_buffer_pool_size = 256M
#innodb_buffer_pool_instances = 8
innodb_stats_on_metadata = off
innodb_open_files = 8192
innodb_read_io_threads = 16
innodb_write_io_threads = 16
innodb_io_capacity = 20000
innodb_thread_concurrency = 0
innodb_lock_wait_timeout = 60
innodb_old_blocks_time=1000
innodb_use_native_aio = 1
innodb_purge_threads=1
innodb_change_buffering=all
innodb_log_file_size = 64M
innodb_log_files_in_group = 2
innodb_data_file_path = ibdata1:256M:autoextend
innodb_rollback_on_timeout=on
# LOGGING #
log_error = /usr/local/mysql/sql_log/mysql-error.log
# log_queries_not_using_indexes = 1
# slow_query_log = 1
slow_query_log_file = /usr/local/mysql/sql_log/slowlog.log
# TimeOut #
#interactive_timeout = 30
#wait_timeout = 30
#net_read_timeout = 60
[mysqldump]
quick
max_allowed_packet = 100M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout
保存退出
注意要将my.cnf权限设置为644，不然初始化时mysql会认为该文件不安全而忽略该文件
编辑 /etc/profile，添加mysql启动路径 //
vi /etc/profile
在底部添加
export PATH=$PATH:/usr/local/mysql/bin
保存退出
更新配置信息
source /etc/profile
可以输出 echo $PATH 查看是否添加成功
返回mysql目录，用mysqld命令初始化mysql
--user：用户
--basedir：安装目录
--datadir：数据库存储路径
cd /usr/local/mysql
mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
初始后就可以启动mysql服务
cd support-files
cp mysql.server /etc/init.d/mysqld
启动服务
/etc/init.d/mysqld start
启动成功显示：Starting MySQL...... SUCCESS!
ps -ef | grep mysql 查看mysql服务，如下图示
成功的图示
mysql8.0之后，root的密码得去mysql-error.log中查询
cd /usr/local/mysql/sql_log/
grep password mysql-error.log
如下图示
登录mysql
mysql -uroot -pgy*D2lpwpHYa
重设root密码
alter user root@localhost identified by '密码'
或者
alter user user() identified by '密码'
创建远程登录用户 192.168.0.%：意思是以192.168.0开头的ip地址都可以用这个账号登录
create user mysql@'192.168.0.%' identified by '123456';
赋予权限 all privileges 所有权限， *.* 所有数据库
这里我是为了方便，实际这样不安全，生产环境不这样设置
grant all privileges *.* on mysql@'192.168.0.%';
刷新权限
flush privileges;
下载mysql的图形化管理工具SQLyog
https://pan.baidu.com/s/1M1ulKx9V2huHFw8-MbsE0A
下载安装后打开如下图
输入虚拟机上linux的地址，登录数据库的用户名，数据库用户密码，连接
虚拟机上linux的ip地址可以通过ip addr命令查看
有时候连接不上，可能是linux的防火墙没有把端口打开firewall-cmd --query-port=3306/tcp // 查看3306有没开
firewall-cmd --add-port=3306/tcp --permanent // 添加3306端口
firewall-cmd --reload // 重新载入添加的端口
firewall-cmd --query-port=3306/tcp // 查看有没开启成功
防火墙相关参考： https://blog.csdn.net/realjh/article/details/82048492
