如何在Centos7.4下部署mysql5.7.24

这篇文章主要介绍“如何在Centos7.4下部署mysql5.7.24”，在日常操作中，相信很多人在如何在Centos7.4下部署mysql5.7.24问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”如何在Centos7.4下部署mysql5.7.24”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！在安装mysql前需要对服务器的环境做一些配置：1、主机名解析，/etc/hosts配置；2、JDK环境变量配置；3、Mysql5.7.24的安装；一、环境操作系统：Centos7.4Mysql数据库：mysql-5.7.24-el7-x86_64.tarJDK：jdk-8u131-linux-x64.tar.gz首先需要将Mysql软件和JDK都上传到服务器上。1、配置主机名解析vi /etc/hosts主机名IP地址例如：主机名IP地址test192.168.1.102、JDK环境配置通常我将软件解压后放在/usr/java目录下，java文件夹需要自己创建：mkdir /usr/java然后解压 jdk-8u131-linux-x64.tar.gz 到 /usr/java目录tar -xzf jdk-8u131-linux-x64.tar.gz -C /usr/java设置环境变量/etc/profile文件里：vi /etc/profile按 i 键进入编辑模式。在 /etc/profile 文件中添加以下信息：export JAVA_HOME=/usr/java/jdk1.8.0_131export JRE_HOME=${JAVA_HOME}/jreexport CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATHexport JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/binexport PATH=$PATH:${JAVA_PATH}按 Esc 键退出编辑模式，输入 :wq 保存并关闭文件。加载环境变量使之生效：source /etc/profile查看 jdk 版本。当出现 jdk 版本信息时，表示 JDK 已经安装成功。#java -versionjava version “1.8.0_141″Java(TM) SE Runtime Environment (build 1.8.0_141-b15)Java HotSpot(TM) 64-Bit Server VM (build 25.141-b15, mixed mode)二、安装mysql
1、在安装mysql前，创建mysql用户groupadd mysqluseradd -g mysql mysql2、然后解压缩mysql-5.7.24-el7-x86_64.tar，会生成mysql-5.7.24-el7-x86_64文件夹，使用mv命令将其名字改为mysql，并放到/usr/local/目录下。mv mysql-5.7.24-el7-x86_64 /usr/local/mysql3、建立data目录，进入到/usr/local/mysql/目录，创建data目录mkdir data4、修改mysql属主使用ch免费主机域名own命令mysql的属主,进入/usr/local目录，执行下面命令chown -R mysql:mysql mysql5、对mysql进行初始化首先进入/usr/local/mysql/bin目录，执行下面语句
./mysqld –user=mysql –basedir=/usr/local/mysql –datadir=/usr/local/mysql/data –initialize执行完毕后如下：
[root@YQHDB2 bin]# ./mysqld –user=mysql –basedir=/usr/local/mysql –datadir=/usr/local/mysql/data –initialize2019-02-01T08:56:56.506838Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use –explicit_defaults_for_timestamp server option (see documentation for more details).2019-02-01T08:56:56.856781Z 0 [Warning] InnoDB: New log files created, LSN=457902019-02-01T08:56:56.913915Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.2019-02-01T08:56:56.973956Z 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: 541f5848-25ff-11e9-800d-000c297c0daa.2019-02-01T08:56:56.975026Z 0 [Warning] Gtid table is not ready to be used. Table ‘mysql.gtid_executed’ cannot be opened.2019-02-01T08:56:56.976563Z 1 [Note] A temporary password is generated for root@localhost: fhDQ&DYMn7IW最后一行的冒号之后，是自动生成的登陆密码，一定要记住，后面会登陆数据库进行修改密码；
6、从support-files目录复制mysql.server文件到/etc/init.d/目录，并改名为mysqld，尝试启动mysqld服务进入/usr/local/mysql/support-files目录，cpmysql.server/etc/init.d/mysqld，然后使用下面命令启动mysqld服务：service mysqld start7、修改数据库密码
登陆数据库修改密码：./mysql -u root -p输入上面初始化时给的密码，使用set password=password(‘你的密码’)进行修改，修改完后，可使用新密码进行登陆。部署过程中遇到的问题处理：1、如果想再次初始化，需要将data文件夹里的内容使用rm -rf * 命令全部删除，然后再初始化；2、mysqld文件里包含了软件安装目录和数据目录，这里软件目录为basedir=/usr/local/mysql ，数据目录为datadir=/usr/local/mysql/data，可以根据自己的喜好进行调整；3、所有的错误信息保存在data目录下，以err为后缀的文件里；4、[ERROR] Could not create unix socket lock file /var/lib/mysql/mysql.sock.lock.
[ERROR] Unable to setup unix socket lock file.需要将/var/lib/目录下的mysql的属主改为mysql，如果没有mysql目录需要创建5、关于my.cnf文件在5.7里没有，这里给大家提供一个比较原始的，为5.5环境下的，具体内容如下：vi /etc/my.cnf[root@YQHDB2 support-files]# vi /etc/my.cnf# Example MySQL config file for medium systems.## This is for a system with little memory (32M – 64M) where MySQL plays# an important part, or systems up to 128M where MySQL is used together with# other programs (such as a web server)## MySQL programs look for option files in a set of# locations which depend on the deployment platform.# You can copy this option file to one of those# locations. For information about these locations, see:# http://dev.mysql.com/doc/mysql/en/option-files.html## In this file, you can use all long options that a program supports.# If you want to know which options a program supports, run the program# with the “–help” option.# The following options will be passed to all MySQL clients[client]#password = your_passwordport = 3306socket = /var/lib/mysql/mysql.sock# Here follows entries for some specific programs# The MySQL server[mysqld]port = 3306socket = /var/lib/mysql/mysql.sockskip-external-lockingkey_buffer_size = 16Mmax_allowed_packet = 1Mtable_open_cache = 64sort_buffer_size = 512Knet_buffer_length = 8Kread_buffer_size = 256Kread_rnd_buffer_size = 512Kmyisam_sort_buffer_size = 8M# Don’t listen on a TCP/IP port at all. This can be a security enhancement,# if all processes that need to connect to mysqld run on the same host.# All interaction w免费主机域名ith mysqld must be made via Unix sockets or named pipes.# Note that using this option without enabling named pipes on Windows# (via the “enable-named-pipe” option) will render mysqld useless!##skip-networking# Replication Master Server (default)# binary logging is required for replicationlog-bin=mysql-bin# binary logging format – mixed recommendedbinlog_format=mixed# required unique id between 1 and 2^32 – 1# defaults to 1 if master-host is not set# but will not function as a master if omittedserver-id = 1# Replication Slave (comment out master section to use this)## To configure this host as a replication slave, you can choose between# two methods :## 1) Use the CHANGE MASTER TO command (fully described in our manual) -# the syntax is:## CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=,# MASTER_USER=, MASTER_PASSWORD= ;## where you replace , , by quoted strings and# by the master’s port number (3306 by default).## Example:## CHANGE MASTER TO MASTER_HOST=’125.564.12.1′, MASTER_PORT=3306,# MASTER_USER=’joe’, MASTER_PASSWORD=’secret’;## OR## 2) Set the variables below. However, in case you choose this method, then# start replication for the first time (even unsuccessfully, for example# if you mistyped the password in master-password and the slave fails to# connect), the slave will create a master.info file, and any later# change in this file to the variables’ values below will be ignored and# overridden by the content of the master.info file, unless you shutdown# the slave server, delete master.info and restart the slaver server.# For that reason, you may want to leave the lines below untouched# (commented) and instead use CHANGE MASTER TO (see above)## required unique id between 2 and 2^32 – 1# (and different from the master)# defaults to 2 if master-host is set# but will not function as a slave if omitted#server-id = 2## The replication master for this slave – required#master-host = ## The username the slave will use for authentication when connecting# to the master – required#master-user = ## The password the slave will authenticate with when connecting to# the master – required#master-password = ## The port the master is listening on.# optional – defaults to 3306#master-port = ## binary logging – not required for slaves, but recommended#log-bin=mysql-bin# Uncomment the following if you are using InnoDB tables#innodb_data_home_dir = /var/lib/mysql#innodb_data_file_path = ibdata1:10M:autoextend#innodb_log_group_home_dir = /var/lib/mysql# You can set .._buffer_pool_size up to 50 – 80 %# of RAM but beware of setting memory usage too high#innodb_buffer_pool_size = 16M#innodb_additional_mem_pool_size = 2M# Set .._log_file_size to 25 % of buffer pool size#innodb_log_file_size = 5M#innodb_log_buffer_size = 8M#innodb_flush_log_at_trx_commit = 1#innodb_lock_wait_timeout = 50[mysqldump]quickmax_allowed_packet = 16M[mysql]no-auto-rehash# Remove the next comment character if you are not familiar with SQL#safe-updates[myisamchk]key_buffer_size = 20Msort_buffer_size = 20Mread_buffer = 2Mwrite_buffer = 2M[mysqlhotcopy]interactive-timeout———————————————————————————–只需将上面的内容复制到my.cnf文件即可，具体需要什么参数，可通过网上查找；到此，关于“如何在Centos7.4下部署mysql5.7.24”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注云技术网站，小编会继续努力为大家带来更多实用的文章！

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