内容简介:不少公司还在使用MySQL5.6,所以本文章依旧以5.6为例演示。下载地址,分享码为:pvvc。将MySQL安装在/usr/local目录下。为什么要创建软链接,请看我的上篇文章,详细介绍软链接使用场景,这就是其中一种。创建MySQL专属的用户,可以做到其他用户不会误操作导致数据库出问题,生产上权限控制是很重要的。
不少公司还在使用 MySQL 5.6,所以本文章依旧以5.6为例演示。下载地址,分享码为:pvvc。将MySQL安装在/usr/local目录下。
# 切换到安装路径 [root@hadoop001 ~]# cd /usr/local # 检查之前是否有MySQL安装 [root@hadoop001 local]# ps -ef|grep mysqld root 2493 2423 0 19:48 pts/3 00:00:00 grep mysqld [root@hadoop001 local]# rpm -qa |grep -i mysql # 解压并创建软链接 [root@hadoop001 local]# tar xzvf mysql-5.6.23-linux-glibc2.5-x86_64.tar.gz [root@hadoop001 local]# ln -s /usr/local/mysql-5.6.23-linux-glibc2.5-x86_64 /usr/local/mysql 复制代码
为什么要创建软链接,请看我的上篇文章,详细介绍软链接使用场景,这就是其中一种。
创建MySQL的用户和用户组
创建MySQL专属的用户,可以做到其他用户不会误操作导致数据库出问题,生产上权限控制是很重要的。
# 创建dba用户组 [root@hadoop001 local]# groupadd -g 101 dba # 创建一个家目录在/usr/local/mysql且主组为dba的用户mysqladmin [root@hadoop001 local]# useradd -u 514 -g dba -G root -d /usr/local/mysql mysqladmin [root@hadoop001 local]# id mysqladmin uid=514(mysqladmin) gid=101(dba) groups=101(dba),0(root) # 赋予mysqladmin用户密码 [root@hadoop001 local]# passwd mysqladmin # copy 环境变量配置文件至mysqladmin用户的home目录 [root@hadoop001 local]# cp /etc/skel/.* /usr/local/mysql/ 复制代码
因为该用户以软链接为家目录,不存在个人环境变量配置文件(也就是以.开头的隐藏文件),如果不太清楚的同学请看之前的 Linux基础知识系列之二 的用户/用户组命令集合部分,详细介绍这种操作的使用场景。
创建MySQL的配置文件
我们所使用的配置文件在/etc/my.conf目录,如果你的系统有这个文件,请清空文件,将下方内容拷贝进文件。
[client] port = 3306 socket = /usr/local/mysql/data/mysql.sock [mysqld] port = 3306 socket = /usr/local/mysql/data/mysql.sock skip-external-locking key_buffer_size = 256M sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 4M query_cache_size= 32M max_allowed_packet = 16M myisam_sort_buffer_size=128M tmp_table_size=32M table_open_cache = 512 thread_cache_size = 8 wait_timeout = 86400 interactive_timeout = 86400 max_connections = 600 # Try number of CPU's*2 for thread_concurrency thread_concurrency = 32 #isolation level and default engine default-storage-engine = INNODB transaction-isolation = READ-COMMITTED server-id = 1 basedir = /usr/local/mysql datadir = /usr/local/mysql/data pid-file = /usr/local/mysql/data/hostname.pid #open performance schema log-warnings sysdate-is-now binlog_format = MIXED log_bin_trust_function_creators=1 log-error = /usr/local/mysql/data/hostname.err log-bin=/usr/local/mysql/arch/mysql-bin #other logs #general_log =1 #general_log_file = /usr/local/mysql/data/general_log.err #slow_query_log=1 #slow_query_log_file=/usr/local/mysql/data/slow_log.err #for replication slave #log-slave-updates #sync_binlog = 1 #for innodb options innodb_data_home_dir = /usr/local/mysql/data/ innodb_data_file_path = ibdata1:500M:autoextend innodb_log_group_home_dir = /usr/local/mysql/arch innodb_log_files_in_group = 2 innodb_log_file_size = 200M innodb_buffer_pool_size = 2048M <-- 如果你的服务器内存小于等于4G,请调成1024M innodb_additional_mem_pool_size = 50M innodb_log_buffer_size = 16M innodb_lock_wait_timeout = 100 #innodb_thread_concurrency = 0 innodb_flush_log_at_trx_commit = 1 innodb_locks_unsafe_for_binlog=1 #innodb io features: add for mysql5.5.8 performance_schema innodb_read_io_threads=4 innodb-write-io-threads=4 innodb-io-capacity=200 #purge threads change default(0) to 1 for purge innodb_purge_threads=1 innodb_use_native_aio=on #case-sensitive file names and separate tablespace innodb_file_per_table = 1 lower_case_table_names=1 [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash [mysqlhotcopy] interactive-timeout [myisamchk] key_buffer_size = 256M sort_buffer_size = 256M read_buffer = 2M write_buffer = 2M 复制代码
默认的读取配置文件顺序为: /etc/my.cnf->/etc/mysql/my.cnf->SYSCONFDIR/my.cnf->$MYSQL_HOME/my.cnf-> --defaults-extra-file->~/my.cnf ,为了避免读取到其他的配置文件,所以我们使用/etc/my.conf。
文件权限更改
# 变更配置文件权限和所属用户 [root@hadoop001 local]# chown mysqladmin:dba /etc/my.cnf [root@hadoop001 local]# chmod 640 /etc/my.cnf # 变更家目录的权限和所属用户,修改完成后,一定要cd进去,ll再看一下 [root@hadoop001 local]# chown -R mysqladmin:dba /usr/local/mysql [root@hadoop001 local]# chown -R mysqladmin:dba /usr/local/mysql/* [root@hadoop001 local]# chmod -R 755 /usr/local/mysql [root@hadoop001 local]# chmod -R 755 /usr/local/mysql/* 复制代码
安装MySQL
# 切换用户 [root@hadoop001 local]# su - mysqladmin [mysqladmin@hadoop001 ~]$ pwd /usr/local/mysql # 创建binlog日志存储的文件夹 [mysqladmin@hadoop001 ~]$ mkdir arch # 检查系统是否安装 [mysqladmin@hadoop001 ~]$ yum -y install autoconf [mysqladmin@hadoop001 ~]$ yum -y install libaio # 开始安装 [mysqladmin@hadoop001 ~]$ scripts/mysql_install_db \ --user=mysqladmin \ --basedir=/usr/local/mysql \ --datadir=/usr/local/mysql/data 复制代码
配置MySQL服务以及开机自启
[root@hadoop001 local]# cd /usr/local/mysql #将服务文件拷贝到init.d下,并重命名为mysql [root@hadoop001 mysql]# cp support-files/mysql.server /etc/rc.d/init.d/mysql #赋予可执行权限 [root@hadoop001 mysql]# chmod +x /etc/rc.d/init.d/mysql #删除服务 [root@hadoop001 mysql]# chkconfig --del mysql #添加服务 [root@hadoop001 mysql]# chkconfig --add mysql [root@hadoop001 mysql]# chkconfig --level 345 mysql on [root@hadoop001 mysql]# vi /etc/rc.local #!/bin/sh # # This script will be executed *after* all the other init scripts. # You can put your own initialization stuff in here if you don't # want to do the full Sys V style init stuff. touch /var/lock/subsys/local su - mysqladmin -c "/etc/init.d/mysql start" <--添加这一行 复制代码
开启MySQL服务并验证是否运行
# 切换用户 [root@hadoop001 mysql]# su - mysqladmin [mysqladmin@hadoop001 ~]$ pwd /usr/local/mysql # 删除自带配置文件以防之后误会 [mysqladmin@hadoop001 ~]$ rm -rf my.cnf # MYSQL运行 [mysqladmin@hadoop001 ~]$ mysqld_safe & <--这个命令可能不会结束,不太影响 # 验证MySQL进程是否有 [mysqladmin@hadoop001 ~]$ ps -ef|grep mysqld 514 6247 6219 0 17:30 pts/1 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe 514 6902 6247 2 17:30 pts/1 00:00:01 /usr/local/mysql/bin/mysqld -- basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin- dir=/usr/local/mysql/lib/plugin --log-error=/usr/local/mysql/data/hostname.err --pid- file=/usr/local/mysql/data/hostname.pid --socket=/usr/local/mysql/data/mysql.sock -- port=3306 514 6927 6219 0 17:31 pts/1 00:00:00 grep mysqld # 验证MySQL端口是否是3306 [mysqladmin@hadoop001 ~]$ netstat -tulnp | grep 6902 tcp 0 0 :::3306 :::* LISTEN 11541/mysqld # 查看MySQL服务 [root@shadoop001 local]# service mysql status MySQL running (21507) [ OK ] 复制代码
如果这一步MySQL并没有启动,请到查看MySQL解压目录/data/hostname.error文件具体报错情况,然后再出对应解决方法。
登陆MySQL
[mysqladmin@hadoop001 ~]$ mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.6.23-log MySQL Community Server (GPL) Copyright (c) 2000, 2015, 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> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | +--------------------+ 4 rows in set (0.00 sec) mysql> use mysql; Database changed # 更新root密码 mysql> update user set password=password('password') where user='root'; Query OK, 4 rows affected (0.00 sec) # 删除MySQL没有账号也没密码的用户 mysql> delete from user where user=''; Query OK, 2 rows affected (0.00 sec) mysql> select host,user,password from user; +----------------+------+-------------------------------------------+ | host | user | password | +----------------+------+-------------------------------------------+ | localhost | root | *6340BE3C15D246B0D74BAF3F135915ED19E0069F | | hadoop001 | root | *6340BE3C15D246B0D74BAF3F135915ED19E0069F | | 127.0.0.1 | root | *6340BE3C15D246B0D74BAF3F135915ED19E0069F | | ::1 | root | *6340BE3C15D246B0D74BAF3F135915ED19E0069F | +----------------+------+-------------------------------------------+ 4 rows in set (0.00 sec) # 刷新用户权限 mysql> flush privileges; 复制代码
配置全局环境变量
[root@hadoop001 ~]# vi /etc/profile # /etc/profile # System wide environment and startup programs, for login setup # Functions and aliases go in /etc/bashrc # It's NOT a good idea to change this file unless you know what you # are doing. It's much better to create a custom.sh shell script in # /etc/profile.d/ to make custom changes to your environment, as this # will prevent the need for merging in future updates. .... for i in /etc/profile.d/*.sh /etc/profile.d/sh.local ; do if [ -r "$i" ]; then if [ "${-#*i}" != "$-" ]; then . "$i" else . "$i" >/dev/null fi fi done unset i unset -f pathmunge MYSQL_HOME=/usr/local/mysql <-- 新增 export MYSQL_HOME PATH=${MYSQL_HOME}/bin:$PATH <-- 新增 export PATH # 全局环境变量生效 [root@hadoop001 ~]# source /etc/profile 复制代码
配置mysqladmin用户环境变量 (非必需)
[root@hadoop001 ~]# su - mysqladmin [mysqladmin@hadoop001 ~]$ vi ~/.bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # 以下新增 unset USERNAME #stty erase ^H set umask to 022 umask 022 PS1=`uname -n`":"'$USER'":"'$PWD'":>"; export PS1 # 个人环境变量生效 [mysqladmin@hadoop001 ~]$ . ~/.bash_profile 复制代码
以上设置,只是为了切换用户之后, 不用再使用pwd命令 ,以下就是实例:
[root@hadoop001 ~]# su - mysqladmin Last login: Mon Jun 24 22:11:23 CST 2019 on pts/1 hadoop001:mysqladmin:/usr/local/mysql:> 复制代码
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