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一. 准备工作
1 删除本地 CentOS7 中的 mariadb:
查看系统中是否已安装 mariadb 服务:
rpm -qa | grep mariadb
或
yum list installed | grep mariadb
如果已安装则删除 mariadb 及其依赖的包:
yum -y remove mariadb-libs-5.5.44-2.el7.centos.x86_64
关闭防火墙:
firewall-cmd –state #查看防火墙状态
systemctl stop firewalld.service #关闭防火墙
systemctl is-enabled firewalld.service;echo $? #查看防火墙是否开机自启
systemctl disable firewalld.service #禁止防火墙开机启动
MySQL 依赖于 libaio 库,安装 libaio
yum search libaio
yum install libaio
2. 下载安装包
mkdir /data
cd /data/
yum -y install wget
wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz
3. 解压、重命名
tar -zxvf mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz -C /data
mv /data/mysql-5.7.20-linux-glibc2.12-x86_64/ /data/mysql57
mkdir mysql #数据目录与安装目录分离,便于以后 MySQL 升级
二. 安装 MySQL
1. 添加用户和组
groupadd mysql
useradd mysql -g mysql
2. 配置文件
/etc/my.cnf
主要参数及取值如下:
(相关取值,请根据实际环境做调整,如内存配置参数等)
#######
[client]
socket = /data/mysql/data/mysql.sock
default-character-set=utf8mb4
#loose-local-infile=0
[mysqld]
log_bin_trust_function_creators=1
secure_file_priv='/tmp'
########dir settings########
basedir = /data/mysql57
datadir = /data/mysql/data
pid-file = /data/mysql/data/mysql.pid
socket = /data/mysql/data/mysql.sock
tmpdir = /data/mysql/tmp
log-bin = /data/mysql/mysql_log/mysql-bin
log-error = /data/mysql/mysql_log/mysql.err
general_log_file=/data/mysql/mysql_log/mysql.genlog
slow_query_log_file = /data/mysql/mysql_log/mysql_slow_new.log
relay_log = /data/mysql/mysql_log/relay.log
########server setting#######
#sql_mode = "ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
server-id = 2022
port = 3306
character-set-server=utf8mb4
collation_server=utf8mb4_unicode_ci
lower_case_table_names = 0
skip_name_resolve = 1
#max_connect_errors = 1000
max_connections = 2000
thread_cache_size=256
#thread_stack= 262144
#back_log=80
max_allowed_packet = 134217728
event_scheduler = 1
local-infile=0
# lower_case_table_names = 1
explicit_defaults_for_timestamp = 1
expire_logs_days = 15
log_bin_trust_function_creators =1
####.frm/.ibd files qty related
open_files_limit=65535
innodb_open_files=65535
table_open_cache=65535
table_definition_cache=65535
#### seesion buffer related
read_buffer_size = 262144
read_rnd_buffer_size = 524288
sort_buffer_size = 8388608
join_buffer_size = 8388608
####memory table size
tmp_table_size =67108864
max_heap_table_size=67108864
####timeout
interactive_timeout = 1800
wait_timeout = 1800
# connect_timeout=10
########slow query ########
slow_query_log = 1
log_slow_slave_statements = 1
log_queries_not_using_indexes = 1
log_throttle_queries_not_using_indexes = 10
long_query_time = 1
#min_examined_row_limit = 10000
########innodb settings########
innodb_buffer_pool_size = 193273528320
innodb_buffer_pool_instances = 16
innodb_buffer_pool_dump_pct = 40
innodb_lru_scan_depth = 2048
innodb_page_cleaners = 16
#innodb_purge_threads = 4
innodb_sort_buffer_size = 67108864
#innodb_file_per_table = 1
#innodb_flush_log_at_trx_commit = 1
innodb_undo_log_truncate = 1
innodb_undo_tablespaces = 3
innodb_max_undo_log_size = 2147483648
innodb_purge_rseg_truncate_frequency = 128
innodb_log_file_size = 1073741824
innodb_log_files_in_group = 3
innodb_log_buffer_size = 16777216
innodb_flush_method = O_DIRECT
innodb_flush_neighbors = 0
innodb_print_all_deadlocks = 1
innodb_strict_mode = 1
#innodb_lock_wait_timeout = 50
innodb_io_capacity = 32768
innodb_io_capacity_max = 65536
innodb_thread_concurrency = 32
innodb_write_io_threads = 8
innodb_read_io_threads = 8
########replication settings########
master_info_repository = TABLE
relay_log_info_repository = TABLE
gtid_mode = on
enforce_gtid_consistency = 1
binlog_gtid_simple_recovery=1
relay_log_recovery = 1
slave-parallel-type = LOGICAL_CLOCK
slave-parallel-workers = 16
slave_transaction_retries=128
slave_preserve_commit_order=1
log_slave_updates=1
binlog_format = ROW
log_timestamps=system
binlog_rows_query_log_events = 1
binlog_row_image='full'
slave_skip_errors = ddl_exist_errors
########semi sync replication settings########
##plugin_dir=/data/mysql/plugin/
#plugin_load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"
#rpl_semi_sync_master_enabled = 1
#rpl_semi_sync_master_timeout = 5000
#rpl_semi_sync_slave_enabled = 1
[mysqldump]
quick
说明:
请一定记得上面 配置模板文件中的 server-id 参数一定要修改。
否则在配置 主从复制,或者 MHA 时会报错。
例如错误信息:
2018-10-09T16:13:53.205115+08:00 11 [ERROR] [MY-013117] [Repl] Slave I/O for channel ”: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; these ids must be different for replication to work (or the –replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it). Error_code: MY-013117
3. 创建目录并授权
cd /data/mysql
mkdir mysql_log
chown -R mysql.mysql mysql_log/
mkdir tmp
chown -R mysql.mysql tmp/
说明:
有时候,可能我们只是将 MYSQL 的二进制文件从其它的服务器 Copy 至本地。
例如我们在安装 MYSQL8.0 时,安装文件从其它的服务,Copy 到本地,文件命名为 mysql80。如下图:
此时还需要执行以下权限,所以 我手动增加了一下权限,执行代码如下:
chmod -R 755 /data/mysql80/bin/
4. 初始化 MySQL
/data/mysql57/bin/mysqld --defaults-file=/etc/my.cnf --initialize --user=mysql --basedir=/data/mysql57 --datadir=/data/mysql/data
说明:
主参数 –defaults-file=/etc/my.cnf 必须紧接在 mysqld 后面,如果做第二个以后的参数加入时,则会出现报错:
[ERROR] unknown variable ‘defaults-file=/etc/my.cnf’!
注意密码:5.7 初始化后会生成一个临时密码,存在 mysql.err
[Note] A temporary password is generated for root@localhost: XXXXXXXX
也就是 root@localhost: 后的字符串。
5. 添加到 MySQL 启动脚本到系统服务, 并且设置开启启动
cp -a /data/mysql57/support-files/mysql.server /etc/init.d/mysqld
设置开机启动和检查是否成功
chkconfig mysqld on
chkconfig --list | grep mysqld
6. 创建 mysql 软链接至 /usr/bin 下
ln -s /data/mysql57/bin/mysql /usr/bin
7. 启动 MySQL 服务
service mysqld start
说明:
如果还是使用的 Copy 文件的方式,例如我们前面 Copy 的 mysql80 二进制文件, 此处就会报错:
此时 还要执行以下赋权命令:
chmod -R 755 ./mysql.server(这个文件是 /data/mysql80/support-files)
和
chmod -R 755 /etc/init.d/mysqld
8. 登录 MySQL,修改 root 密码
mysql -uroot -pXXXXXXX
mysql> set password=password('XXXXXXX2');
说明:
MySQL 8.0 是报错的:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘password(‘XXXXX’)’ at line 1
在登录 MySQL,修改 root 密码时,使用就方法 SET PASSWORD=PASSWORD(‘[ 新密码]’) 报错。
查看网上的相关解释为:
以前版本的 MySQL 的密码认证插件是“mysql_native_password”,而现在使用的是“caching_sha2_password”。
解决方案:
ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘ 新密码 ’;
FLUSH PRIVILEGES;
: