centos7 安装mysql57

个人经验，直奔主题，centos7采用yum安装mysql-server 避免了各种人为的处理依赖。
1，下载官方Yum源：http://dev.mysql.com/downloads/repo/

# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

直接将mysql*.rpm文件下载下来之后执行下列操作

sudo yum localinstall mysql57-community-release-el7-*.noarch.rpm

完成上面两步之后直接进入下一步

sudo yum install mysql-server

2，更新/etc/my.cnf或/etc/mysql/my.cnf
因为更新配置文件可能会依照特定需求修改mysql数据文件及日志文件等存储目录，为确保mysql用户对新目录拥有相应的权限，可在更新配置文件前将原mysql拥有目录复制至新目录：

[mysqld]datadir=/home/mysqlsocket=/var/lib/mysql/mysql.sockuser=mysqlskip-name-resolveskip-grant-tables # Disabling symbolic-links is recommended to prevent assorted security risks#symbolic-links=0transaction-isolation=READ-COMMITTED# Disabling symbolic-links is recommended to prevent assorted security risks;# to do so, uncomment this line:# symbolic-links=0key_buffer              = 16Mkey_buffer_size         = 32Mmax_allowed_packet      = 16Mthread_stack            = 256Kthread_cache_size       = 64query_cache_limit       = 8Mquery_cache_size        = 64Mquery_cache_type        = 1# Important: see Configuring the Databases and Setting max_connectionsmax_connections         = 750# log-bin should be on a disk with enough free space#log-bin=/x/home/mysql/logs/binary/mysql_binary_log# For MySQL version 5.1.8 or later. Comment out binlog_format for older versions.#binlog_format           = mixedread_buffer_size = 2Mread_rnd_buffer_size = 16Msort_buffer_size = 8Mjoin_buffer_size = 8M# InnoDB settingsinnodb_file_per_table = 1innodb_flush_log_at_trx_commit  = 2innodb_log_buffer_size          = 64Minnodb_buffer_pool_size         = 4Ginnodb_thread_concurrency       = 8innodb_flush_method             = O_DIRECTinnodb_log_file_size = 512M[mysqld_safe]log-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pid

2.3安装MySQL JDBC Connector
sudo yum install mysql-connector-java
2.4启动Mysql
sudo service mysqld start
2.5设置Mysql的root密码，初始密码为空（非必须）rootcentos
$ sudo /usr/bin/mysql_secure_installation
[…]
Enter current password for root (enter for none):
OK, successfully used password, moving on…
[…]
Set root password? [Y/n] y
New password:
Re-enter new password:
Remove anonymous users? [Y/n] Y
[…]
Disallow root login remotely? [Y/n] N
[…]
Remove test database and access to it [Y/n] Y
[…]
Reload privilege tables now? [Y/n] Y
All done!

2.6设置Mysql为开机自动启动
sudo/sbin/chkconfigmysqldon sudo /sbin/chkconfig –list mysqld
mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off
2.7为Cloudera Manager创建MySQL Databases(本人做集群用)
（1）用root登陆Mysql：$ mysql -u root –p
（2）脚本
create database amon DEFAULT CHARACTER SET utf8;
grant all on amon.* TO ‘amon’@’%’ IDENTIFIED BY ‘amon_password’;
create database smon DEFAULT CHARACTER SET utf8;
grant all on smon.* TO ‘smon’@’%’ IDENTIFIED BY ‘smon_password’;
create database rman DEFAULT CHARACTER SET utf8;
grant all on rman.* TO ‘rman ‘@’%’ IDENTIFIED BY ‘rman_password’;
create database hmon DEFAULT CHARACTER SET utf8;
grant all on hmon.* TO ‘hmon’@’%’ IDENTIFIED BY ‘hmon_password’;
create database hive DEFAULT CHARACTER SET utf8;
grant all on hive.* TO ‘hive’@’%’ IDENTIFIED BY ‘hive_password’;
create database nav DEFAULT CHARACTER SET utf8;
grant all on nav.* TO ‘nav’@’%’ IDENTIFIED BY ‘nav_password’;
（3）执行实例
Create a database for the Activity Monitor. The database name, user name, and password can be anything you want. For example:
mysql> create database amon DEFAULT CHARACTER SET utf8;
Query OK, 1 row affected (0.00 sec)
mysql>grant all on amon.* TO ‘amon’@’%’ IDENTIFIED BY ‘amon_password’;
Query OK, 0 rows affected (0.00 sec)
（3）Create a database for the Service Monitor. The database name, user name, and password can be anything you want. For example:
mysql> create database smon DEFAULT CHARACTER SET utf8;
Query OK, 1 row affected (0.00 sec)
mysql> grant all on smon.* TO ‘smon’@’%’ IDENTIFIED BY ‘smon_password’;
Query OK, 0 rows affected (0.00 sec)
（4）Create a database for the Report Manager. The database name, user name, and password can be anything you want. For example:
mysql> create database rman DEFAULT CHARACTER SET utf8;
Query OK, 1 row affected (0.00 sec)
mysql> grant all on rman.* TO ‘rman ‘@’%’ IDENTIFIED BY ‘rman_password’;
Query OK, 0 rows affected (0.00 sec)
（5）Create a database for the Host Monitor. The database name, user name, and password can be anything you want. For example:
mysql> create database hmon DEFAULT CHARACTER SET utf8;
Query OK, 1 row affected (0.00 sec)
mysql> grant all on hmon.* TO ‘hmon’@’%’ IDENTIFIED BY ‘hmon_password’;
Query OK, 0 rows affected (0.00 sec)
（6）Create a database for the Hive metastore. The database name, user name, and password can be anything you want. For example:
mysql> create database hive DEFAULT CHARACTER SET utf8;
Query OK, 1 row affected (0.00 sec)
mysql> grant all on hive.* TO ‘hive’@’%’ IDENTIFIED BY ‘hive_password’;
Query OK, 0 rows affected (0.00 sec)
（7）Create a database for Cloudera Navigator. The database name, user name, and password can be anything you want. For example:
mysql> create database nav DEFAULT CHARACTER SET utf8;
Query OK, 1 row affected (0.00 sec)
mysql>grant all on nav.* TO ‘nav’@’%’ IDENTIFIED BY ‘nav_password’;
Query OK, 0 rows affected (0.00 sec)

2.8为Mysql设置备份
使用mysqldump，命令格式如下：
mysqldump-h-u-p>/tmp/.sql
For example, to back up database scm_database on the local host as the root user, with the password mypasswd:
mysqldump−pmypasswdscmdatabase>/tmp/scmdatabase−backup.sqlTobackupdatabasescmdatabaseonremotehostmyhost.example.comastherootuser,withthepasswordmypasswd: mysqldump -hmyhost.example.com -uroot -pcloudera scm_database > /tmp/scm_database-backup.sql

如果你顺利的执行到此处，恭喜你，很顺利，但是本人在实际中遇到了问题，问题描素就是：
1，Access denied for user ‘root’@’localhost’ (using password: NO)
处理方法：密码不对

[root ~]# grep 'temporary password' /var/log/mysqld.log2017-07-05T07:32:13.291107Z 1 [Note] A temporary password is generated for root@localhost: l(0P<cNuwMd1

执行之后找到密码，登录之后继续上诉的2.5步骤
2，[ERROR] InnoDB: Unable to lock ./ibdata1 error: 11
[Note] InnoDB: Check that you do not already have another mysqld process using the same InnoDB data
or log files.
处理方法：有进程共用mysqlid

mysqld stopservice mysqld stopps -ef|grep mysql*kill -9 对应的进程id

以上基本上可以处理这个问题了之后再重启mysql （service mysqld start），此时进入上诉2.4步骤
3,service mysql start failed
改问题与上诉2问题类似

# lsof -i:3306

查看mysql有没有进行，之后按照2的处理方式进行处理
4, Failed! Error: Your password does not satisfy the current policy requirements
处理方法： 你的密码级别很高，重置的密码级别不高，重设
5,改密码级别
进入mysql之后

set global validate_password_policy=0;set global validate_password_length=0; SET PASSWORD FOR 'root'@'localhost' = PASSWORD('root');