配置CentOS SCLo源

[3] 新增 CentOS SCLo Software collections Repository.
[[email protected]~]# yum -y install centos-release-scl-rh centos-release-scl
# set [priority=10]
[[email protected]~]# sed -i -e "s/\]$/\]\npriority=10/g" /etc/yum.repos.d/CentOS-SCLo-scl.repo
[[email protected]~]# sed -i -e "s/\]
 
$/\]\npriority=10/g" /etc/yum.repos.d/CentOS-SCLo-scl-rh.repo
# for another way, change to [enabled=0] and use it only when needed
[[email protected]~]# sed -i -e "s/enabled=1/enabled=0/g" /etc/yum.repos.d/CentOS-SCLo-scl.repo
[[email protected] ~]# sed -i -e "s/enabled=1/enabled=0/g" /etc/yum.repos.d/CentOS-SCLo-scl-rh.repo
 

yum安裝MySQL

# 安裝mysql
[[email protected]~]# yum --enablerepo=centos-sclo-rh -y install rh-mysql56-mysql-server
# 載入環境變數
[[email protected] ~]# scl enable rh-mysql56 bash
[[email protected] ~]# mysql -V 
mysql  Ver 14.14 Distrib 5.6.26, for Linux (x86_64) using  EditLine wrapper
[[email protected]
 
 ~]# which mysql 
/opt/rh/rh-mysql56/root/usr/bin/mysql
# 設定mysql開機自啟動
[email protected] ~]# vi /etc/profile.d/rh-mysql56.sh
#!/bin/bash
source /opt/rh/rh-mysql56/enable
export X_SCLS="`scl enable rh-mysql56 'echo $X_SCLS'`"

[4] Enable MySQL 5.6 and Configure initial settings.
[[email protected] ~]# vi /etc/opt/rh/rh-mysql56/my.cnf.d/mysql-server.cnf
# add follows within [mysqld] section
[mysqld]
character-set-server=utf8
[[email protected] ~]# systemctl start rh-mysql56-mysqld
[[email protected] ~]# systemctl enable rh-mysql56-mysqld
[[email protected] ~]# mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user.  If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
# set root password
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
 ... Success!
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
Remove anonymous users? [Y/n] y
 ... 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
Disallow root login remotely? [Y/n] y
 ... 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
Remove test database and access to it? [Y/n] 
 - 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
Reload privilege tables now? [Y/n] y
 ... Success!
Cleaning up...
All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!

[[email protected] ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.6.26 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>  select user,host,password from mysql.user; 
+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | *E2ACEC2F2DA384EE6753673365DFEF35F0C272C9 |
| root | 127.0.0.1 | *E2ACEC2F2DA384EE6753673365DFEF35F0C272C9 |
| root | ::1       | *E2ACEC2F2DA384EE6753673365DFEF35F0C272C9 |
+------+-----------+-------------------------------------------+
3 rows in set (0.00 sec)
mysql> show databases; 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)
mysql> exit
Bye

開啟防火牆
[[email protected] ~]# firewall-cmd –add-service=mysql –permanent
success
[[email protected] ~]# firewall-cmd –reload
success

• 同樣使用yum在vdevops.org上面安裝mysql，安裝步驟參考上面

MySQL 主從

• Master端：linuxprobe

[[email protected]~]# vi /etc/opt/rh/rh-mysql56/my.cnf.d/mysql-server.cnf
[mysqld]
# add follows in [mysqld] section : get binary logs
log-bin=mysql-bin
# define uniq server ID
server-id=101
[[email protected] ~]# mysql -u root -p 
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.26-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> grant replication slave on *.* to [email protected]'%' identified by 'password';
Query OK, 0 rows affected (0.07 sec)
mysql> flush privileges; 
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye

開啟防火牆
[[email protected] ~]# firewall-cmd –add-service=mysql –permanent
success
[[email protected] ~]# firewall-cmd –reload
success

• Slave端：vdevops

[root@vdevops~]# vi /etc/opt/rh/rh-mysql56/my.cnf.d/mysql-server.cnf
[mysqld]
# add follows in [mysqld] section : get binary logs
log-bin=mysql-bin
# define server ID (different one from Master Host)
server-id=102
# read only
read_only=1
# define own hostname
report-host=node01.srv.world
[root@vdevops~]# systemctl restart rh-mysql56-mysqld

• Master端：備份資料庫

[[email protected] ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.26-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> flush tables with read lock;   # 鎖表
Query OK, 0 rows affected (0.01 sec)
mysql> show master status;    #記住file的數值和position的值
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      400 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql> exit
Bye
#
[[email protected] ~]#  mysqldump -u root -p --all-databases --lock-all-tables --events > mysql_dump.sql     # 備份資料庫
Enter password: 
[[email protected] ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.26-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> unlock tables;  # 解鎖
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye
[[email protected] ~]# scp mysql_dump.sql [email protected]/tmp/
cp: cannot create regular file ‘[email protected]/tmp/’: No such file or directory
[[email protected] ~]# scp mysql_dump.sql vdevops.org:/tmp/
The authenticity of host 'vdevops.org (10.1.1.56)' can't be established.
ECDSA key fingerprint is f8:d2:55:54:8f:e8:43:e0:ee:aa:d6:8d:53:8c:8e:85.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'vdevops.org' (ECDSA) to the list of known hosts.
mysql_dump.sql    

• Slave 端：

[[email protected] ~]# mysql -u root -p < /tmp/mysql_dump.sql
Enter password: 
[[email protected] ~]#  mysql -u root -p 
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.26-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> change master to
    -> master_host='10.1.1.53',     # master ip
    -> master_user='replica',       # replication ID
    -> master_password='password',  # replication passwd
    -> master_log_file='mysql-bin.000001',  # bin-log number
    -> master_log_pos=400;          # position
Query OK, 0 rows affected, 2 warnings (0.03 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.1.1.53
                  Master_User: replica
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 475
               Relay_Log_File: mysqld-relay-bin.000002
                Relay_Log_Pos: 358
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: 
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 475
              Relay_Log_Space: 532
              Until_Condition: None
               Until_Log_File: 
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File: 
           Master_SSL_CA_Path: 
              Master_SSL_Cert: 
            Master_SSL_Cipher: 
               Master_SSL_Key: 
        Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 101
                  Master_UUID: d47dddc3-9c70-11e6-8efb-000c29ffc05a
             Master_Info_File: /var/opt/rh/rh-mysql56/lib/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 0
1 row in set (0.00 sec)