Centos安装配置Mysql，以及防火墙的设置
Centos6.5:
yum -y install mysql mysql-server mysql-devel
Centos7:
由于yum中没有mysql的资源，所以先安装带有当前可用的mysql5系列社区版资源的rpm包。
#######安装rpm包
[root@typecodes ~]# rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
Retrieving http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-release-el7-5 ################################# [100%]
这时查看当前可用的mysql安装资源：
[root@typecodes ~]# yum repolist enabled | grep "mysql.*-community.*"
mysql-connectors-community/x86_64 MySQL Connectors Community 14
mysql-tools-community/x86_64 MySQL Tools Community 17
mysql56-community/x86_64 MySQL 5.6 Community Server 139
从上面的列表可以看出， mysql56-community/x86_64 和 MySQL 5.6 Community Server 可以使用。
因此，我们就可以直接用yum方式安装了MySQL5.6版本了。
[root@typecodes ~]# yum -y install mysql-community-server
Loaded plugins: axelget, langpacks
No metadata available for base
No metadata available for epel
No metadata available for extras
(Failed to load module fastestmirror: No module named fastestmirror)
repomd.xml | 2.5 kB 00:00:00
update mysql-connectors-community metadata successfully
(Failed to load module fastestmirror: No module named fastestmirror)
repomd.xml | 2.5 kB 00:00:00
update mysql-tools-community metadata successfully
(Failed to load module fastestmirror: No module named fastestmirror)
repomd.xml | 2.5 kB 00:00:00
update mysql56-community metadata successfully
No metadata available for updates
mysql-connectors-community | 2.5 kB 00:00:00
mysql-tools-community | 2.5 kB 00:00:00
mysql56-community | 2.5 kB 00:00:00
(1/3): mysql-connectors-community/x86_64/primary_db | 7.3 kB 00:00:00
(2/3): mysql56-community/x86_64/primary_db | 83 kB 00:00:01
mysql-tools-community/x86_64/p FAILED ============================================== ] 19 kB/s | 92 kB 00:00:00 ETA
http://repo.mysql.com/yum/mysql-tools-community/el/7/x86_64/repodata/3301d2eb425f300dec5a46c4201d08f2cf9232a6-primary.sqlite.bz2: [Errno 12] Timeout on http://repo.mysql.com/yum/mysql-tools-community/el/7/x86_64/repodata/3301d2eb425f300dec5a46c4201d08f2cf9232a6-primary.sqlite.bz2: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 3 seconds')
Trying other mirror.
(3/3): mysql-tools-community/x86_64/primary_db | 15 kB 00:00:00
Resolving Dependencies
--> Running transaction check
---> Package mysql-community-server.x86_64 0:5.6.24-3.el7 will be installed
--> Processing Dependency: mysql-community-common(x86-64) = 5.6.24-3.el7 for package: mysql-community-server-5.6.24-3.el7.x86_64
--> Processing Dependency: mysql-community-client(x86-64) = 5.6.24-3.el7 for package: mysql-community-server-5.6.24-3.el7.x86_64
--> Processing Dependency: perl(DBI) for package: mysql-community-server-5.6.24-3.el7.x86_64
--> Running transaction check
---> Package mariadb.x86_64 1:5.5.41-2.el7_0 will be obsoleted
---> Package mysql-community-client.x86_64 0:5.6.24-3.el7 will be obsoleting
--> Processing Dependency: mysql-community-libs(x86-64) = 5.6.24-3.el7 for package: mysql-community-client-5.6.24-3.el7.x86_64
---> Package mysql-community-common.x86_64 0:5.6.24-3.el7 will be installed
---> Package perl-DBI.x86_64 0:1.627-4.el7 will be installed
--> Processing Dependency: perl(RPC::PlServer) >= 0.2001 for package: perl-DBI-1.627-4.el7.x86_64
--> Processing Dependency: perl(RPC::PlClient) >= 0.2000 for package: perl-DBI-1.627-4.el7.x86_64
--> Running transaction check
---> Package mariadb-libs.x86_64 1:5.5.41-2.el7_0 will be obsoleted
--> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.41-2.el7_0 for package: 1:mariadb-devel-5.5.41-2.el7_0.x86_64
---> Package mysql-community-libs.x86_64 0:5.6.24-3.el7 will be obsoleting
---> Package perl-PlRPC.noarch 0:0.2020-14.el7 will be installed
--> Processing Dependency: perl(Net::Daemon) >= 0.13 for package: perl-PlRPC-0.2020-14.el7.noarch
--> Processing Dependency: perl(Net::Daemon::Test) for package: perl-PlRPC-0.2020-14.el7.noarch
--> Processing Dependency: perl(Net::Daemon::Log) for package: perl-PlRPC-0.2020-14.el7.noarch
--> Processing Dependency: perl(Compress::Zlib) for package: perl-PlRPC-0.2020-14.el7.noarch
--> Running transaction check
---> Package mariadb-devel.x86_64 1:5.5.41-2.el7_0 will be obsoleted
---> Package mysql-community-devel.x86_64 0:5.6.24-3.el7 will be obsoleting
---> Package perl-IO-Compress.noarch 0:2.061-2.el7 will be installed
--> Processing Dependency: perl(Compress::Raw::Zlib) >= 2.061 for package: perl-IO-Compress-2.061-2.el7.noarch
--> Processing Dependency: perl(Compress::Raw::Bzip2) >= 2.061 for package: perl-IO-Compress-2.061-2.el7.noarch
---> Package perl-Net-Daemon.noarch 0:0.48-5.el7 will be installed
--> Running transaction check
---> Package perl-Compress-Raw-Bzip2.x86_64 0:2.061-3.el7 will be installed
---> Package perl-Compress-Raw-Zlib.x86_64 1:2.061-4.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================================================================
Installing:
mysql-community-client x86_64 5.6.24-3.el7 mysql56-community 19 M
replacing mariadb.x86_64 1:5.5.41-2.el7_0
mysql-community-devel x86_64 5.6.24-3.el7 mysql56-community 3.4 M
replacing mariadb-devel.x86_64 1:5.5.41-2.el7_0
mysql-community-libs x86_64 5.6.24-3.el7 mysql56-community 2.0 M
replacing mariadb-libs.x86_64 1:5.5.41-2.el7_0
mysql-community-server x86_64 5.6.24-3.el7 mysql56-community 58 M
Installing for dependencies:
mysql-community-common x86_64 5.6.24-3.el7 mysql56-community 256 k
perl-Compress-Raw-Bzip2 x86_64 2.061-3.el7 base 32 k
perl-Compress-Raw-Zlib x86_64 1:2.061-4.el7 base 57 k
perl-DBI x86_64 1.627-4.el7 base 802 k
perl-IO-Compress noarch 2.061-2.el7 base 260 k
perl-Net-Daemon noarch 0.48-5.el7 base 51 k
perl-PlRPC noarch 0.2020-14.el7 base 36 k
Transaction Summary
=======================================================================================================================================================================
Install 4 Packages (+7 Dependent packages)
Total download size: 83 M
Downloading packages:
mysql-community-devel-5.6.24-3.el7.x86_64.rpm | 3.4 MB 00:00:03
mysql-community-client-5.6.24-3.el7.x86_64.rpm | 19 MB 00:00:05
mysql-community-server-5.6.24-3.el7.x86_64.rpm | 58 MB 00:00:11
mysql-community-libs-5.6.24-3.el7.x86_64.rpm | 2.0 MB 00:00:02
perl-DBI-1.627-4.el7.x86_64.rpm | 0 B 00:00:01 ...
perl-DBI-1.627-4.el7.x86_64.rpm | 802 kB 00:00:00
(1/6): perl-Compress-Raw-Zlib-2.061-4.el7.x86_64.rpm | 57 kB 00:00:00
(2/6): perl-Net-Daemon-0.48-5.el7.noarch.rpm | 51 kB 00:00:00
(3/6): perl-PlRPC-0.2020-14.el7.noarch.rpm | 36 kB 00:00:00
(4/6): perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64.rpm | 32 kB 00:00:00
(5/6): perl-IO-Compress-2.061-2.el7.noarch.rpm | 260 kB 00:00:00
warning: /var/cache/yum/x86_64/7/mysql56-community/packages/mysql-community-common-5.6.24-3.el7.x86_64.rpm: V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY 00:00:01 ETA
Public key for mysql-community-common-5.6.24-3.el7.x86_64.rpm is not installed
(6/6): mysql-community-common-5.6.24-3.el7.x86_64.rpm | 256 kB 00:00:01
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 388 kB/s | 692 kB 00:00:01
Retrieving key from file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Importing GPG key 0x5072E1F5:
Userid : "MySQL Release Engineering "
Fingerprint: a4a9 4068 76fc bd3c 4567 70c8 8c71 8d3b 5072 e1f5
Package : mysql-community-release-el7-5.noarch (installed)
From : file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
Installing : mysql-community-common-5.6.24-3.el7.x86_64 1/14
Installing : mysql-community-libs-5.6.24-3.el7.x86_64 2/14
Installing : mysql-community-client-5.6.24-3.el7.x86_64 3/14
Installing : perl-Net-Daemon-0.48-5.el7.noarch 4/14
Installing : 1:perl-Compress-Raw-Zlib-2.061-4.el7.x86_64 5/14
Installing : perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64 6/14
Installing : perl-IO-Compress-2.061-2.el7.noarch 7/14
Installing : perl-PlRPC-0.2020-14.el7.noarch 8/14
Installing : perl-DBI-1.627-4.el7.x86_64 9/14
Installing : mysql-community-server-5.6.24-3.el7.x86_64 10/14
Installing : mysql-community-devel-5.6.24-3.el7.x86_64 11/14
Erasing : 1:mariadb-devel-5.5.41-2.el7_0.x86_64 12/14
Erasing : 1:mariadb-5.5.41-2.el7_0.x86_64 13/14
Erasing : 1:mariadb-libs-5.5.41-2.el7_0.x86_64 14/14
Verifying : perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64 1/14
Verifying : mysql-community-common-5.6.24-3.el7.x86_64 2/14
Verifying : mysql-community-devel-5.6.24-3.el7.x86_64 3/14
Verifying : mysql-community-client-5.6.24-3.el7.x86_64 4/14
Verifying : perl-PlRPC-0.2020-14.el7.noarch 5/14
Verifying : mysql-community-server-5.6.24-3.el7.x86_64 6/14
Verifying : 1:perl-Compress-Raw-Zlib-2.061-4.el7.x86_64 7/14
Verifying : mysql-community-libs-5.6.24-3.el7.x86_64 8/14
Verifying : perl-Net-Daemon-0.48-5.el7.noarch 9/14
Verifying : perl-DBI-1.627-4.el7.x86_64 10/14
Verifying : perl-IO-Compress-2.061-2.el7.noarch 11/14
Verifying : 1:mariadb-5.5.41-2.el7_0.x86_64 12/14
Verifying : 1:mariadb-devel-5.5.41-2.el7_0.x86_64 13/14
Verifying : 1:mariadb-libs-5.5.41-2.el7_0.x86_64 14/14
Installed:
mysql-community-client.x86_64 0:5.6.24-3.el7 mysql-community-devel.x86_64 0:5.6.24-3.el7 mysql-community-libs.x86_64 0:5.6.24-3.el7
mysql-community-server.x86_64 0:5.6.24-3.el7
Dependency Installed:
mysql-community-common.x86_64 0:5.6.24-3.el7 perl-Compress-Raw-Bzip2.x86_64 0:2.061-3.el7 perl-Compress-Raw-Zlib.x86_64 1:2.061-4.el7 perl-DBI.x86_64 0:1.627-4.el7
perl-IO-Compress.noarch 0:2.061-2.el7 perl-Net-Daemon.noarch 0:0.48-5.el7 perl-PlRPC.noarch 0:0.2020-14.el7
Replaced:
mariadb.x86_64 1:5.5.41-2.el7_0 mariadb-devel.x86_64 1:5.5.41-2.el7_0 mariadb-libs.x86_64 1:5.5.41-2.el7_0
Complete!
安装完MySQL后，需要进行一些基础配置工作：
#######安装成功后，将其加入开机启动
[root@typecodes ~]# systemctl enable mysqld
#######启动mysql服务进程
[root@typecodes ~]# systemctl start mysqld
#######配置mysql（设置密码等）
[root@typecodes ~]# 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? [Y/n] y [设置root用户密码]
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? [Y/n] 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? [Y/n] n [禁止root远程登录]
... 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? [Y/n] y [删除test数据库]
- Dropping test database...
ERROR 1008 (HY000) at line 1: Can't drop database 'test'; database doesn't exist
... Failed! Not critical, keep moving...
- 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? [Y/n] y [刷新权限]
... Success!
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
Cleaning up...
最后是防火墙的设置
Centos6.5:
#/sbin/iptables -I INPUT -p tcp --dport 3306 -j ACCEPT
然后保存：
#/etc/rc.d/init.d/iptables save
查看打开的端口：
# /etc/init.d/iptables status
-------------------------------------------------------
补充说明：
#关闭防火墙
/etc/init.d/iptables stop
service iptables stop # 停止服务
#查看防火墙信息
/etc/init.d/iptables status
#开放端口:8080
/sbin/iptables -I INPUT -p tcp --dport 8080 -j ACCEPT
#重启防火墙以便改动生效:(或者直接重启系统)
/etc/init.d/iptables restart
#将更改进行保存
/etc/rc.d/init.d/iptables save
另外直接在/etc/sysconfig/iptables中增加一行：
-A RH-Firewall-1-INPUT -m state –state NEW -m tcp -p tcp –dport 8080 -j ACCEPT
#永久关闭防火墙
chkconfig –level 35 iptables off #此方法源自网络，未实验，安全考虑拒绝使用此方法
Centos7:
CentOS升级到7之后，发现无法使用iptables控制Linuxs的端口，google之后发现Centos 7使用firewalld代替了原来的iptables。下面记录如何使用firewalld开放Linux端口：
开启端口
firewall-cmd --zone=public --add-port=80/tcp --permanent
命令含义：
--zone #作用域
--add-port=80/tcp #添加端口，格式为：端口/通讯协议
--permanent #永久生效，没有此参数重启后失效
重启防火墙
firewall-cmd --reload
如：
[caibo@localhost /]$ firewall-cmd --zone=public --add-port=3306/tcp --permanent
success
[caibo@localhost /]$ firewall-cmd --reload
systemctl stop firewalld.service #停止
systemctl disable firewalld.service #禁用
mysql安装后还要允许远程连接，其他服务器才能连接到本地的数据库。
mysql账户是否不允许远程连接。如果无法连接可以尝试以下方法：
mysql -u root -p //登录MySQL
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'WITH GRANT OPTION; //任何远程主机都可以访问数据库
mysql> FLUSH PRIVILEGES; //需要输入次命令使修改生效
mysql> EXIT //退出
也可以通过修改表来实现远程：
mysql -u root -p
mysql> use mysql;
mysql> update user set host = '%' where user = 'root';
mysql> select host, user from user;
整合至：
http://www.tuicool.com/articles/rUrAv2
http://www.linuxidc.com/Linux/2015-03/114749.htm
http://blog.163.com/bo_cai@yeah/blog/static/86096191201541963521154/