mysql系列：centos7.6上安装mysql8.0

centos7.6 上mysql8.0的安装

安装mysql8.0.16版本

安装包可以从mysql官网下载，也可以https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-8.0/这里下载

删除原来的数据库

卸载maridb

[root@localhost ~]# rpm -qa|grep mariadb
mariadb-5.5.60-1.el7_5.x86_64
mariadb-server-5.5.60-1.el7_5.x86_64
mariadb-libs-5.5.60-1.el7_5.x86_64


rpm -e --nodeps mariadb-5.5.60-1.el7_5.x86_64

rpm -e --nodeps mariadb-server-5.5.60-1.el7_5.x86_64

查看是否已经安装mysql

[root@localhost ~]# rpm -qa | grep -i mysql
akonadi-mysql-1.9.2-4.el7.x86_64
perl-DBD-MySQL-4.023-6.el7.x86_64
qt-mysql-4.8.7-2.el7.x86_64
[root@localhost ~]# rpm -e --nodeps akonadi-mysql-1.9.2-4.el7.x86_64
[root@localhost ~]# rpm -e --nodeps perl-DBD-MySQL-4.023-6.el7.x86_64
[root@localhost ~]# rpm -e --nodeps qt-mysql-4.8.7-2.el7.x86_64

删除mysql文件

[root@localhost ~]# find / -name mysql
/etc/selinux/targeted/active/modules/100/mysql
/root/.virtualenvs/django_env/lib/python3.6/site-packages/django/contrib/gis/db/backends/mysql
/root/.virtualenvs/django_env/lib/python3.6/site-packages/django/db/backends/mysql
/root/mysql
/var/lib/mysql
/var/lib/mysql/mysql
/usr/lib64/mysql


[root@localhost ~]# rm -rf /val/lib/mysql
[root@localhost ~]# rm -rf /usr/lib/mysql
[root@localhost ~]# rm -rf /usr/lib64/mysql

删除配置文档

rm -rf /etc/my.cnf

再次查找机器是否安装mysql

rpm -qa|grep -i mysql

关闭Selinux

# 临时关闭
setenforce 0
# 永久关闭
vim /etc/sysconfig/selinux
SELINUX=enforcing 改为 SELINUX=disabled

重启服务reboot

安装mysql依赖包（选做）

yum -y install libaio.so.1 libgcc_s.so.1 libstdc++.so.6
yum update libstdc++-4.4.7-4.el6.x86_64
yum search libaio # 检索相关信息
yum install libaio # 安装依赖包
yum install net-tools

第一种安装方式 rpm包

# 安装包
mysql-community-client-8.0.17-1.el7.x86_64.rpm
mysql-community-common-8.0.17-1.el7.x86_64.rpm
mysql-community-libs-8.0.17-1.el7.x86_64.rpm
mysql-community-server-8.0.17-1.el7.x86_64.rpm

# 按照顺序安装
rpm -ivh mysql-community-common-8.0.17-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.17-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.17-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.17-1.el7.x86_64.rpm

可能的报错解决方案

报错1 
error: Failed dependencies: /usr/bin/perl is needed by 
mysql-community-server-8.0.11-1.el7.x86_64 perl(Getopt::Long) is 
needed by mysql-community-server-8.0.11-1.el7.x86_64 perl(strict)

解决1 
yum install perl


报错2 
error: Failed dependencies: 
libaio.so.1()(64bit) is needed by mysql-community-server-8.0.11-1.el7.x86_64 
libaio.so.1(LIBAIO_0.1)(64bit) is needed by mysql-community-server-8.0.11-1.el7.x86_64 
解决2 
wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libaio-0.3.107-10.el6.x86_64.rpm 
rpm -ivh http://mirror.centos.org/centos/6/os/x86_64/Packages/libaio-0.3.107-10.el6.x86_64.rpm

初始mysqld –initialize启动数据库

mysqld --initailize --user=mysql
chown mysql:mysql /var/lib/mysql -R
systemctl  start  mysqld

报错

[root@localhost mysql]# mysqld --initailize
2019-07-28T08:06:16.454284Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.17) starting as process 17757
2019-07-28T08:06:16.457257Z 0 [ERROR] [MY-010123] [Server] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!
2019-07-28T08:06:16.457292Z 0 [ERROR] [MY-010119] [Server] Aborting
2019-07-28T08:06:16.457404Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.17)  MySQL Community Server - GPL.

# 解决方案
vim /etc/my.cnf
user=mysql
port=3306


mysqld --initailize --user=mysql


systemctl start mysqld.service



2019-07-28T08:08:22.699288Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.17)  MySQL Community Server - GPL.
2019-07-28T08:10:21.874694Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.17) starting as process 18083
2019-07-28T08:10:21.884794Z 1 [ERROR] [MY-012592] [InnoDB] Operating system error number 13 in a file operation.
2019-07-28T08:10:21.884807Z 1 [ERROR] [MY-012595] [InnoDB] The error means mysqld does not have the access rights to the directory.
2019-07-28T08:10:21.884818Z 1 [ERROR] [MY-012270] [InnoDB] os_file_get_status() failed on './ibdata1'. Can't determine file permissions
2019-07-28T08:10:21.884830Z 1 [ERROR] [MY-010334] [Server] Failed to initialize DD Storage Engine
2019-07-28T08:10:21.885164Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2019-07-28T08:10:21.885227Z 0 [ERROR] [MY-010119] [Server] Aborting

# 解决
ll /var/run/mysqld/
# 不存在
mkdir -p /var/run/mysqld/
chown -R mysql:mysql /var/run/mysqld
# 如果还报错，则进入下一步。
# 关闭selinux.并重启。
setenforce 0

# 重启服务
service mysqld restart

  systemctl status mysqld.service

开机启动服务设置

systemctl  enable mysqld

查看初始化密码

# 命令查看数据库的密码
cat /var/log/mysqld.log | grep password 

第二种mysql安装方式（建议使用这一种）

userdel mysql

# 增加mysql用户组，用户
groupadd mysql
useradd -g mysql mysql

tar xf mysql-8.0.17-linux-glibc2.12-x86_64.tar.xz
mv mysql-8.0.17-linux-glibc2.12-x86_64 /usr/local/mysql

cd /usr/local/mysql
mkdir data sql_log undo_log

chown mysql:mysql -R data/ sql_log/ undo_log/

vim /etc/profile
export PATH=$PATH:/usr/localmysql/bin

source /etc/profile
# 拷贝my.cnf的下方内容
vim /etc/my.cnf
:%s@/home/mysql@/usr/local/mysql@

# 初始化
mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data


# 拷贝启动程序
cd /usr/local/mysql/support-files
cp mysql.server /etc/init.d/mysqld

# 启动服务
/etc/init.d/mysqld start

# 报错
Starting MySQL. ERROR! The server quit without updating PID file (/usr/local/mysql/data//localhost.localdomain.pid).
检查my.cnf中路径配置是否有误前面创建的三个文件夹是否一致，文件夹用户组是否属于mysql


# 查询密码：
[root@localhost sql_log]# grep password mysql-error.log
2019-07-28T10:50:16.286737Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: du%3pH5VBo;l

# 登录mysql
mysql -uroot -p

# 可以看到版本号为8.0.17
[root@localhost sql_log]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 9
Server version: 8.0.17

Copyright (c) 2000, 2019, 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.

mysql>

# 修改密码
alter user user() identified by '123456';

my.cnf配置文件

[client]
port=3306
socket=/usr/local/mysql/data/mysql.sock
[mysqld]
# Skip #
skip_name_resolve= 1
skip-external-locking=1 
symbolic-links= 0
# 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
#log_error=/usr/local/mysql/sql_log/mysql_1302.err
port=3306
bind-address=0.0.0.0
explicit_defaults_for_timestamp=off
#sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
sql_mode=NO_ENGINE_SUBSTITUTION
#read_only=on
# MyISAM #
key_buffer_size=32M
#myisam_recover=FORCE,BACKUP

# undo log #
innodb_undo_directory=/usr/local/mysql/undo_log
innodb_undo_tablespaces=16

# SAFETY #
max_allowed_packet=100M
max_connect_errors=1000000
sysdate_is_now=1
#innodb	= FORCE
#innodb_strict_mode=1
secure-file-priv=/usr/local/mysql/sql_log
default_authentication_plugin='mysql_native_password'
# Replice #
 server-id=1306
 relay_log=mysqld-relay-bin
 gtid_mode=on
 enforce-gtid-consistency
 log-slave-updates=on
 master_info_repository=TABLE
 relay_log_info_repository=TABLE


# group replication specific options
#plugin-load=group_replication.so
#group_replication=FORCE_PLUS_PERMANENT
#transaction-write-set-extraction=XXHASH64
#loose-group_replication_start_on_boot=ON
#loose-group_replication_bootstrap_group=OFF
#loose-group_replication_group_name='aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa'
#group_replication_local_address='10.102.13.2:33061'
#group_replication_group_seeds='10.102.13.3:33061,10.102.13.5:33061'

# 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
 expire_logs_days=7
# 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        = 2G
 #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 = 128M
 innodb_log_files_in_group = 3
 innodb_data_file_path  = ibdata1:1024M: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_1305.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