本文主要给大家介绍安装mysql 5.7.21 二进制流程讲析，希望可以给大家补充和更新些知识，如有其它问题需要了解的可以持续在亿速云行业资讯里面关注我的更新文章的。
适用于CentOS 6.*和CentOS 7.* 系统版本：CentOS 6.8_x86-64 mysql版本：mysql-5.7.21-linux-glibc2.5-x86_64.tar.gz mysql程序安装路径：/data/mysql mysql数据存放路径：/data/mysql/data socket存放路径： /data/mysql/mysql.sock 安装方式：二进制文件安装
[root@MYSQL ~]# yum install libaio numactl -y [root@MYSQL ~]# groupadd mysql [root@MYSQL ~]# useradd -r -g mysql -M -s /bin/false mysql
1、MySQL依赖于libaio 库。如果这个库没有在本地安装，数据目录初始化和后续的云服务器启动步骤将会失败。 2、此用户仅用于运行mysql服务，而不是登录，因此使用useradd -r和-s /bin/false命令选项来创建对服务器主机没有登录权限的用户。
[root@MYSQL ~]# cd /data/ [root@MYSQL data]# wget https://cdn.mysql.com/archives/mysql-5.7/mysql-5.7.21-linux-glibc2.5-x86_64.tar.gz [root@MYSQL data]# tar -xvf mysql-5.7.21-linux-glibc2.5-x86_64.tar.gz [root@MYSQL data]# ln -s mysql-5.7.21-linux-glibc2.5-x86_64 /data/mysql [root@MYSQL data]# mkdir -p/data/mysql/{logs,tmp} [root@MYSQL data]# chown -R mysql:mysql /data/mysql/
[root@MYSQL data]# cd /data/mysql/
[root@MYSQL mysql]# echo export PATH='${PATH}':/data/mysql/bin > /etc/profile.d/mysql.sh
[root@MYSQL mysql]# source /etc/profile.d/mysql.sh
[root@MYSQL mysql]# echo $PATH # 验证# 环境变量添加到全局中时，两个软链接可以不用设置
[root@MYSQL mysql]# ln -s /data/mysql/bin/mysql /usr/bin [root@MYSQL mysql]# ln -s /data/mysql/bin/mysqld /usr/bin
[root@MYSQL mysql]# echo "/data/mysql/lib" > /etc/ld.so.conf.d/mysql.conf [root@MYSQL mysql]# ldconfig # 重新加载动态链接库
如果安装在/usr/local/mysql/目录下，则两个sed不许执行，因为默认安装在/usr/local/目录下；
[root@MYSQL mysql]# sed -i 's#/usr/local/mysql#/data/mysql#g' /data/mysql/bin/mysqld_safe [root@MYSQL mysql]# sed -i 's#/usr/local/mysql#/data/mysql#g' /data/mysql/support-files/mysql.server
参考知数堂叶金荣老师的my.cnf生成器，根据需要选择使用，附链接： http://imysql.com/my-cnf-wizard.html
[root@MYSQL mysql]# vim /etc/my.cnf [client] port = 3306 socket = /data/mysql/mysql.sock default-character-set = utf8 [mysqld] server-id = 1 user = mysql port = 3306 basedir = /data/mysql datadir = /data/mysql/data socket = /data/mysql/mysql.sock tmpdir = /data/mysql/tmp character-set-server = utf8mb4 innodb_file_per_table = 1 lower_case_table_names = 1 #0：区分大小写，1：不区分大小写 skip_name_resolve = 1 open_files_limit = 65535 back_log = 1024 max_connections = 512 max_connect_errors = 1000000 table_open_cache = 60000 table_definition_cache = 60000 #两个table为预计建表个数的两倍 table_open_cache_instances = 64 thread_stack = 512K external-locking = FALSE max_allowed_packet = 32M sort_buffer_size = 16M join_buffer_size = 16M thread_cache_size = 768 query_cache_size = 0 query_cache_type = 0 interactive_timeout = 600 wait_timeout = 600 tmp_table_size = 96M max_heap_table_size = 96M log_error = /data/mysql/logs/error.log slow_query_log = 1 slow_query_log_file = /data/mysql/logs/slow.log long_query_time = 2 binlog-ignore-db = mysql log-bin = /data/mysql/logs/mysql-bin sync_binlog = 0 binlog_cache_size = 4M max_binlog_cache_size = 2G max_binlog_size = 1G expire_logs_days = 60 #bin-log保留天数 master_info_repository = TABLE relay_log_info_repository = TABLE gtid_mode = on enforce_gtid_consistency = 1 log_slave_updates binlog_format = row relay_log_recovery = 1 relay-log-purge = 1 key_buffer_size = 32M read_buffer_size = 8M read_rnd_buffer_size = 16M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 10G myisam_repair_threads = 1 lock_wait_timeout = 3600 explicit_defaults_for_timestamp = 1 #autocommit = 1 #autocommit=1事务自动执行 innodb_thread_concurrency = 0 innodb_sync_spin_loops = 100 innodb_spin_wait_delay = 30 sql_mode = STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION #sql_mode自定义在项目sql语句报错时开启 transaction_isolation = REPEATABLE-READ #innodb_additional_mem_pool_size = 16M innodb_buffer_pool_size = 10469M #innodb_buffer_pool_size物理内存的70% innodb_buffer_pool_instances = 8 innodb_buffer_pool_load_at_startup = 1 innodb_buffer_pool_dump_at_shutdown = 1 #innodb_data_file_path = ibdata1:1G:autoextend #innodb_data_file_path待优化 innodb_flush_log_at_trx_commit = 2 #默认值1是每一次事务提交或事务外的指令都需要把日志写入（flush）硬盘 #设成2是不写入硬盘而是写入系统缓存。日志仍然会每秒flush到硬盘，处理效率会很高，设成2只会在整个操作系统挂了时才可能丢数据。 innodb_log_buffer_size = 32M innodb_log_file_size = 2G innodb_log_files_in_group = 2 innodb_max_undo_log_size = 4G # 根据您的服务器IOPS能力适当调整 # 一般配普通SSD盘的话，可以调整到 10000 - 20000 # 配置高端PCIe SSD卡的话，则可以调整的更高，比如 50000 - 80000 innodb_io_capacity = 4000 innodb_io_capacity_max = 8000 innodb_flush_neighbors = 0 innodb_write_io_threads = 8 innodb_read_io_threads = 8 innodb_purge_threads = 4 innodb_page_cleaners = 4 innodb_open_files = 65535 innodb_max_dirty_pages_pct = 50 innodb_flush_method = O_DIRECT innodb_lru_scan_depth = 4000 innodb_checksum_algorithm = crc32 #innodb_file_format = Barracuda #innodb_file_format_max = Barracuda innodb_lock_wait_timeout = 10 innodb_rollback_on_timeout = 1 innodb_print_all_deadlocks = 1 innodb_online_alter_log_max_size = 4G internal_tmp_disk_storage_engine = InnoDB innodb_stats_on_metadata = 0 innodb_status_file = 1 # 注意: 开启 innodb_status_output & innodb_status_output_locks 后, 可能会导致log-error文件增长较快 innodb_status_output = 0 innodb_status_output_locks = 0 #performance_schema performance_schema = 1 performance_schema_instrument = '%=on' #innodb monitor innodb_monitor_enable="module_innodb" innodb_monitor_enable="module_server" innodb_monitor_enable="module_dml" innodb_monitor_enable="module_ddl" innodb_monitor_enable="module_trx" innodb_monitor_enable="module_os" innodb_monitor_enable="module_purge" innodb_monitor_enable="module_log" innodb_monitor_enable="module_lock" innodb_monitor_enable="module_buffer" innodb_monitor_enable="module_index" innodb_monitor_enable="module_ibuf_system" innodb_monitor_enable="module_buffer_page" innodb_monitor_enable="module_adaptive_hash" [mysqldump] quick max_allowed_packet = 32M
--initialize-insecure参数：使用空密码创建root@localhost。
[root@MYSQL mysql]# cd /data/mysql/ [root@MYSQL mysql]# ./bin/mysqld --initialize-insecure --defaults-file=/etc/my.cnf --basedir=/data/mysql --datadir=/data/mysql/data --user=mysql
--initialize参数：生成随机密码。
[root@MYSQL mysql]# cd /data/mysql/ [root@MYSQL mysql]# ./bin/mysqld --initialize --defaults-file=/etc/my.cnf --basedir=/data/mysql --datadir=/data/mysql/data --user=mysql 2017-07-11T07:34:36.210764Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2017-07-11T07:34:37.826785Z 0 [Warning] InnoDB: New log files created, LSN=45790 2017-07-11T07:34:38.275547Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2017-07-11T07:34:38.487524Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 65189e9f-660b-11e7-912f-b0518e005cf6. 2017-07-11T07:34:38.544417Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2017-07-11T07:34:38.545337Z 1 [Note] A temporary password is generated for root@localhost: chpta=hXj4*#
注意：此时会生成一个临时密码，root@localhost：后面的是临时密码; 如果没有输出上面的信息，可以在error.log文件找,或把/etc/my.cnf文件移走；
[root@MYSQL mysql]# grep 'temporary password' /data/mysql/logs/error.log
参考：https://blog.51cto.com/moerjinrong/2367282
[root@MYSQL mysql]# cd /data/mysql/ [root@MYSQL mysql]# yum install openssl -y [root@MYSQL mysql]# bin/mysql_ssl_rsa_setup --basedir=/data/mysql --datadir=/data/mysql/data --user=mysql [root@MYSQL mysql]# cd data [root@MYSQL mysql]# chown mysql:mysql *.pem [root@MYSQL mysql]# ll *.pem -rw------- 1 mysql mysql 1675 3月 8 18:34 ca-key.pem -rw-r--r-- 1 mysql mysql 1107 3月 8 18:34 ca.pem -rw-r--r-- 1 mysql mysql 1107 3月 8 18:34 client-cert.pem -rw------- 1 mysql mysql 1675 3月 8 18:34 client-key.pem -rw------- 1 mysql mysql 1679 3月 8 18:34 private_key.pem -rw-r--r-- 1 mysql mysql 451 3月 8 18:34 public_key.pem -rw-r--r-- 1 mysql mysql 1107 3月 8 18:34 server-cert.pem -rw------- 1 mysql mysql 1675 3月 8 18:34 server-key.pem
CentOS 6.*：
[root@MYSQL ~]# cd /data/mysql [root@MYSQL mysql]# chmod 755 support-files/mysql.server [root@MYSQL mysql]# cp support-files/mysql.server /etc/init.d/mysqld [root@MYSQL mysql]# chkconfig --add mysqld [root@MYSQL mysql]# chkconfig mysqld on [root@MYSQL mysql]# chkconfig --list mysqld
CentOS 7.*:
[root@MYSQL mysql]# vim /usr/lib/systemd/system/mysqld.service # Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; version 2 of the License. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA # # systemd service file for MySQL forking server # [Unit] Description=MySQL Server Documentation=man:mysqld(8) Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html After=network.target After=syslog.target [Install] WantedBy=multi-user.target [Service] User=mysql Group=mysql ExecStart=/data/mysql/bin/mysqld --defaults-file=/etc/my.cnf LimitNOFILE = 65535 让systemctl加载配置服务 [root@MYSQL mysql]# systemctl enable mysqld.service [root@MYSQL mysql]# systemctl is-enabled mysqld enabled
CentOS 6.*
[root@MYSQL mysql]# service mysqld start [root@MYSQL mysql]# service mysqld status # 查看是否运行
CentOS 7.*
[root@MYSQL mysql]# systemctl start mysqld.service [root@MYSQL mysql]# systemctl status mysqld.service
[root@MYSQL mysql]# /data/mysql/bin/mysqld_safe --user=mysql &
[root@MYSQL ~]# cd /data/mysql [root@MYSQL mysql]# ./bin/mysql_secure_installation Securing the MySQL server deployment. Enter password for user root: #输入初始化时的临时密码 The existing password for the user account root has expired. Please set a new password. New password: #设置新密码 Re-enter new password: #重复新密码 VALIDATE PASSWORD PLUGIN can be used to test passwords and improve security. It checks the strength of password and allows the users to set only those passwords which are secure enough. Would you like to setup VALIDATE PASSWORD plugin? Press y|Y for Yes, any other key for No: y #是否设置密码安全插件(不是DBA，不推荐设置) There are three levels of password validation policy: LOW Length >= 8 MEDIUM Length >= 8, numeric, mixed case, and special characters STRONG Length >= 8, numeric, mixed case, special characters and dictionary file Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0 #选择0，长度大于8位；根据自己设置 Using existing password for root. Estimated strength of the password: 100 Change the password for root ? ((Press y|Y for Yes, any other key for No) : n #是否更改root的现有密码 ... skipping. By default, a MySQL installation has an anonymous user, allowing anyone to log into MySQL without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment. Remove anonymous users? (Press y|Y for Yes, any other key for No) : y #删除匿名用户 Success. Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at the root password from the network. Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y #禁止root登录远程 Success. By default, MySQL comes with a database named 'test' that anyone can access. This is also intended only for testing, and should be removed before moving into a production environment. Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y #删除测试数据库 - Dropping test database... Success. - Removing privileges on test database... Success. Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y #重新加载权限表 Success. All done! [root@MYSQL mysql]#
[root@MYSQL mysql]# mysql -uroot -p mysql> grant all on *.* to 'java'@'%' identified by 'jado@1301'; #授权并同时新建用户 mysql> flush privileges; #刷新权限 附： create user java identified by '123456'; #新建普通用户java（密码：123456） grant all on ras.* to "java"@"%"; #授权：把ras库内的所有权限授权给java用户 revoke all on *.* from "java"@"%"; #取消授权 drop user "java"@"%"; #直接删除用户 grant all on *.* to 'java'@'%' identified by 'jado@1301'; #授权并同时新建用户 grant select,insert,update,delete on ras.* to java@”%” Identified by “123456”; #权限：增删查改
在对MySQL数据库进行迁移的时候，有时候也需要迁移源数据库内的用户与权限。 对于这个迁移我们可以从mysql.user表来获取用户的相关权限来生成相应的SQL语句，然后在目标服务器上来执行生成的SQL语句即可。 说明：mysql中直接通过授权即可使用对应用户，不必使用创建用户命令（如CREATE USER 'xxx'@'%' IDENTIFIED BY 'XXX';）先建用户再授权。 该脚本可以将所有授权数据到当前目录下的sql脚本（grants.sql）中，使用grants.sql脚本刷到数据库中即可完成授权数据迁移（注意：这里导出的数据包含root用户的授权关系，而且导入之后会把目前已有的数据覆盖掉，请确认需要覆盖再进行导入！！）：
vim mysql_user_ migrate.sh
#!/bin/bash
#Function export user privileges
pwd=rootroot
expgrants()
{
mysql -B -u'root' -p${pwd} -N $@ -e "SELECT CONCAT('SHOW GRANTS FOR ''', user, '''@''', host, ''';') AS query FROM mysql.user" | mysql -u'root' -p${pwd} $@ | sed 's/\(GRANT .*\)/\1;/;s/^\(Grants for .*\)/-- \1 /;/--/{x;p;x;}'
}
expgrants > ./grants.sql注意：上述代码中，需要根据实际情况（mysql的root用户的密码）替换pwd的值。 将上述代码拷贝后，新建并贴到shell脚本（如exp_grants.sh）中执行该脚本即可完成数据库用户授权导出。 以上文件导出后的脚本（grants.sql）中内容类似如下片段：
1. -- Grants for root@% 2. GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY PASSWORD '*FAAFFE644E901CFAFAEC7562415E5FAEC243B8B2' WITH GRANT OPTION; 3. 4. -- Grants for skyleo@% 5. GRANT ALL PRIVILEGES ON *.* TO 'aaa'@'%' IDENTIFIED BY PASSWORD '*E6A7BF712C9294EEF165FC1CD0AD04FABC5E1136' WITH GRANT OPTION; 6. 7. -- Grants for skyleo1@% 8. GRANT ALL PRIVILEGES ON *.* TO 'aaa1'@'%' IDENTIFIED BY PASSWORD '*1E9DC9809EBE1D5089616868F2DE14B375DACF64' WITH GRANT OPTION; 9. 10. -- Grants for skyleo2@% 11. GRANT ALL PRIVILEGES ON *.* TO 'aaa2'@'%' IDENTIFIED BY PASSWORD '*A601FAAA6AB2D539501BA7FE6E816D499207BA76' WITH GRANT OPTION; 12.
导入新数据库：
mysql -uroot -p mysql < grants.sql
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