MySQL5.6升级5.7步骤

升级步骤：

1、对mysql5.6进行全库备份（******）用于失败倒回
2、关闭mysql5.6版本数据库
3、将mysql5.7软件部署
4、修改配置信息
5、修改启动脚本
6、启动mysql5.7数据库
7、mysql_upgrade升级数据库相关参数
8、重启数据库，测试升级结果

首先对数据库进行物理备份,利用percona xtrabackup.
关闭5.6的数据库
安装5.7的二进制安装包.
修改/etc/profile 改变环境变量指向5.7.执行source /etc/profile 生效
编辑5.7的system启动文件

[unit]
description=mysql server
documentation=man:mysqld(8)
documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
after=network.target
after=syslog.target
[install]
wantedby=multi-user.target
[service]
user=mysql
group=mysql
execstart=/data/app/mysql/bin/mysqld --defaults-file=/mysql/3306/my.cnf
limitnofile = 5000

启动数据库
systemctl start mysqld
使用mysql_upgrade 检查

[root@db01 ~]# mysql_upgrade -s /mysql/mysql.sock
checking if update is needed.
checking server version.
running queries to upgrade mysql server.
checking system database.
mysql.columns_priv                                 ok
mysql.db                                           ok
mysql.engine_cost                                  ok
mysql.event                                        ok
mysql.func                                         ok
mysql.general_log                                  ok
mysql.gtid_executed                                ok
mysql.help_category                                ok
mysql.help_keyword                                 ok
mysql.help_relation                                ok
mysql.help_topic                                   ok
mysql.innodb_index_stats                           ok
mysql.innodb_table_stats                           ok
mysql.ndb_binlog_index                             ok
mysql.plugin                                       ok
mysql.proc                                         ok
mysql.procs_priv                                   ok
mysql.proxies_priv                                 ok
mysql.server_cost                                  ok
mysql.servers                                      ok
mysql.slave_master_info                            ok
mysql.slave_relay_log_info                         ok
mysql.slave_worker_info                            ok
mysql.slow_log                                     ok
mysql.tables_priv                                  ok
mysql.time_zone                                    ok
mysql.time_zone_leap_second                        ok
mysql.time_zone_name                               ok
mysql.time_zone_transition                         ok
mysql.time_zone_transition_type                    ok
mysql.user                                         ok
upgrading the sys schema.
checking databases.
sys.sys_config                                     ok
world.city                                         ok
world.country                                      ok
world.countrylanguage                              ok
upgrade process completed successfully.
checking if update is needed.

重启数据库

[root@db01 ~]# systemctl restart mysqld
[root@db01 ~]# netstat -lntp
active internet connections (only servers)
proto recv-q send-q local address           foreign address         state       pid/program name    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               listen      8902/sshd           
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               listen      8912/postmaster     
tcp6       0      0 :::3306                 :::*                    listen      10347/mysqld        
tcp6       0      0 :::22                   :::*                    listen      8902/sshd           
tcp6       0      0 ::1:5432                :::*                    listen      8912/postmaster