Linux系统集群架构线上项目配置实战（四）

Linux系统集群架构线上项目配置实战（三）

写在前面

项目到目前为止，前面将所有应用工程的安装与配置已阐述完成，今天将要介绍的是数据库的安装、配置、主从同步等相关过程

MySQL安装方法介绍

至于数据库的安装与配置，在之前的文章中也介绍过很多种方法，一般数据库的几种安装方法如下：

1、yum安装

此种安装，一般用于内网对数据库要求不高的环境，如监控服务等

2、常规编译安装

5.5之前的版本可直接使用./configure make && make install 直接进行编译安装即可，但之后的版本需要引用第三方软件cmake，然后进行编译安装

3、rpm包安装

下载相应的rpm包进行安装

4、二进制安装

下载相应版本的二进制安装包，解压、初始化即可完成安装

对于哪种方法安装好，按实际生需求来

安装MySQL服务

今天介绍的就是使用二进制安装包进行安装mysql

安装相关依赖库

yum install libao libao-devel -y

添加用户

groupadd mysql

useradd -g mysql mysql -s /sbin/nologin –M

下载软件

wget http://mirrors.sohu.com/mysql/MySQL-5.7/mysql-5.7.17-linux-glibc2.5-x86\_64.tar.gz

解压至目录

[root@mysql-m ~]# tar zxf mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz -C /usr/local/

[root@mysql-m ~]# ln -s /usr/local/mysql-5.7.17-linux-glibc2.5-x86_64 /usr/local/mysql

[root@mysql-m mysql]# mkdir /data

[root@mysql-m mysql]#chown –R mysql.mysql /data

初始化数据库

[root@mysql-m ~]# /usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf --initialize --user=mysql

2017-09-23T09:14:16.724707Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2017-09-23T09:14:17.698204Z 0 [Warning] InnoDB: New log files created, LSN=45790

2017-09-23T09:14:17.888059Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.

2017-09-23T09:14:17.977944Z 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: 93b7f20c-a03f-11e7-b91d-000c29d812ec.

2017-09-23T09:14:17.988894Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.

2017-09-23T09:14:17.995157Z 1 [Note] A temporary**password is generated for root@localhost: csnbtzNIf0-6**

拷贝启动文件

[root@mysql-m ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld

[root@mysql-m ~]# chmod +x /etc/init.d/mysqld

[root@mysql-m ~]# /etc/init.d/mysqld start

Starting MySQL. SUCCESS!

[root@mysql-m ~]# lsof -i :3306

COMMAND  PID  USER  FD  TYPE DEVICE SIZE/OFF NODE NAME

mysqld 1639 mysql 20u IPv6 15683 0t0  TCP *:mysql (LISTEN)

[root@mysql-m ~]# ln -s /data/mysql.sock /tmp/

默认登陆是通过/tmp/mysql.sock文件来连接mysql，可以在配置文件里指定路径也可以实现此种效果，否则登录就会报错

########以上配置另外的从库同上述操作###############

数据库主从同步配置

其实相关的配置之前的文章也有介绍过，但为了整个项目的完整性，在此再次介绍一遍整个操作过程

修改主从服务器的配置文件

[root@mysql-m ~]# vim /etc/my.cnf

[mysqld]

basedir = /usr/local/mysql/

datadir = /data

socket = /data/mysql.sock

server-id = 1

log-bin = /data/mysql-bin

relay-log = /data/master.relay-bin

relay-log-info-file = /data/master.relay-log.info

user=mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

replicate-ignore-db=mysql

  

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

[root@mysql-s ~]# vim /etc/my.cnf

[mysqld]

basedir=/usr/local/mysql

datadir=/data

socket=/data/mysql.sock

user=mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

server-id = 2

#log-bin = /data/mysql-bin

relay-log = /data/slave.relay-bin

relay-log-info-file = /data/slave.relay-log.info

  

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

配置文件注释就不过多介绍，可参考前面的文章

主库创建并授权同步的用户

mysql> grant replication slave on *.* to rep@'10.0.0.%' identified by'123456';

Query OK, 0 rows affected, 1 warning (0.04 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.04 sec)

主从服务器重启服务，主库进行全备

将全备文件推送至从库

恢复从库

执行change master语句

[root@mysql-s ~]# mysql -uroot -p123456 </root/master.sql

[root@mysql-s ~]# mysql -uroot -p123456

mysql> change master to

    -> master_host='10.0.0.11',

    -> master_port=3306,

    -> master_user='rep',

    -> master_password='123456',

    -> master_log_file='mysql-bin.000001',

    -> master_log_pos=154;

Query OK, 0 rows affected, 2 warnings (0.04 sec)

mysql> start slave;

Query OK, 0 rows affected (0.02 sec)