centos环境安装mysql5.7
1.yum方式安装(不推荐)
a.安装mysql5.7 yum源centos6:
wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm
yum localinstall mysql-community-release-el6-5.noarch.rpm
centos7:
wget dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm
yum localinstall mysql57-community-release-el7-7.noarch.rpm
yum方式安装：
yum install mysql-community-server
2.rpm方式安装(推荐)
因yum源是在国外下载速度非常慢，建议直接下载后通过本地安装
centos6:
mysql-community-client-5.7.15-1.el6.x86_64.rpm
mysql-community-common-5.7.15-1.el6.x86_64.rpm
mysql-community-libs-5.7.15-1.el6.x86_64.rpm
mysql-community-server-5.7.15-1.el6.x86_64.rpm
centos7:
mysql-community-client-5.7.15-1.el7.x86_64.rpm
mysql-community-common-5.7.15-1.el7.x86_64.rpm
mysql-community-libs-5.7.15-1.el7.x86_64.rpm
mysql-community-server-5.7.15-1.el7.x86_64.rpm
yum localinstall -y mysql-community*.rpm
报错：
Error: Package: 2:postfix-2.6.6-6.el6_7.1.x86_64 (localyum)
Requires: libmysqlclient.so.16(libmysqlclient_16)(64bit)
Removing: mysql-libs-5.1.71-1.el6.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5)
libmysqlclient.so.16(libmysqlclient_16)(64bit)
Obsoleted By: mysql-community-libs-5.7.15-1.el6.x86_64 (/mysql-community-libs-5.7.15-1.el6.x86_64)
Not found
Updated By: mysql-libs-5.1.73-7.el6.x86_64 (localyum)
libmysqlclient.so.16(libmysqlclient_16)(64bit)
Error: Package: 2:postfix-2.6.6-6.el6_7.1.x86_64 (localyum)
Requires: libmysqlclient.so.16()(64bit)
Removing: mysql-libs-5.1.71-1.el6.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5)
libmysqlclient.so.16()(64bit)
Obsoleted By: mysql-community-libs-5.7.15-1.el6.x86_64 (/mysql-community-libs-5.7.15-1.el6.x86_64)
Not found
Updated By: mysql-libs-5.1.73-7.el6.x86_64 (localyum)
libmysqlclient.so.16()(64bit)
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
解决办法：
rpm -e --nodeps mysql-libs-5.1.71-1.el6.x86_64
1）默认 root 密码为空，其实不为空，使用 mysql -u root -p 进行登录失败
2)mysql_secure_installation这个初始化也不行
直接编辑mysql配置文件
vim /etc/my.cnf
加入
skip-grant-tables
注意：要加在[mysqld]的位置
重启数据库
#进入 mysql控制台
# mysql
可能的报错：
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)
解决办法：加上-h127.0.0.1
[root@node2 bin]# mysql -h127.0.0.1 -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.7.15 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, 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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.13 sec)
>use mysql;
# 修改密码
>update user set authentication_string = password('yourpasswd'), password_expired = 'N', password_last_changed = now() where user = 'root';
删掉skip-grant-tables，再次重启即可
添加用户时，报错，是因为密码策略的问题，我们只是测试，密码不需要那么复杂
mysql> grant all privileges on test.* to jack@'%' identified by "test";
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
修改密码策略即可
mysql> set global validate_password_policy=0;
mysql5.7开发环境的配置示例：
[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock max_connections=1024 # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid sql_mode = "STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_UNSIGNED_SUBTRACTION" [client] default-character-set = utf8mb4 [mysql] default-character-set = utf8mb4 [mysqld] character-set-client-handshake = FALSE character-set-server = utf8mb4 collation_server = utf8mb4_general_ci init_connect='SET NAMES utf8mb4'
ucloud mysql5.7配置：
[client] default-character-set = utf8mb4 [mysql] default-character-set = utf8mb4 [mysqld] back_log = 2000 basedir = /opt/udb/program/mysql/mysql-5.7.12 bind-address = 127.0.0.1 binlog-format = MIXED character-set-client-handshake = 0 character_set_server = utf8mb4 datadir = /opt/udb/instance/mysql-5.7/xxxxxxxx/data event_scheduler = ON expire_logs_days = 7 general-log-file = /opt/udb/instance/mysql-5.7/xxxxxxxx/log/mysqld.log init_connect = 'SET NAMES utf8mb4' innodb_buffer_pool_size = 377487360 innodb_data_file_path = ibdata1:100M:autoextend innodb_data_home_dir = /opt/udb/instance/mysql-5.7/xxxxxxxx/data innodb_file_per_table = 1 innodb_flush_log_at_trx_commit = 2 innodb_flush_method = O_DIRECT innodb_io_capacity = 2000 innodb_log_buffer_size = 8388608 innodb_log_file_size = 512M innodb_log_files_in_group = 2 innodb_log_group_home_dir = /opt/udb/instance/mysql-5.7/xxxxxxxx/data innodb_max_dirty_pages_pct = 50 innodb_open_files = 1024 innodb_read_io_threads = 8 innodb_thread_concurrency = 20 innodb_write_io_threads = 8 key_buffer_size = 33554432 local_infile = 1 log-bin = /opt/udb/instance/mysql-5.7/xxxxxxxx/binlog/mysql-bin.log log-error = /opt/udb/instance/mysql-5.7/xxxxxxxx/log/mysqld.log log_bin_trust_function_creators = 1 log_output = TABLE long_query_time = 3 max_allowed_packet = 16777216 max_connect_errors = 1000000 max_connections = 2000 myisam_sort_buffer_size = 8388608 net_buffer_length = 8192 performance_schema = 0 performance_schema_max_table_instances = 200 pid-file = /opt/udb/instance/mysql-5.7/xxxxxxxx/mysqld.pid port = 3306 query_cache_size = 16777216 read_buffer_size = 262144 read_rnd_buffer_size = 524288 relay-log = /opt/udb/instance/mysql-5.7/xxxxxxxx/relaylog/mysql-relay.log secure-file-priv = /opt/udb/instance/mysql-5.7/xxxxxxxx/tmp server-id = 2130706433 skip-slave-start skip_name_resolve slave-load-tmpdir = /opt/udb/instance/mysql-5.7/xxxxxxxx/tmp slave-parallel-type = LOGICAL_CLOCK slave_parallel_workers = 8 slow-query-log-file = /opt/udb/instance/mysql-5.7/xxxxxxxx/log/mysql-slow.log slow_query_log = 1 socket = /opt/udb/instance/mysql-5.7/xxxxxxxx/mysqld.sock sort_buffer_size = 524288 sql_mode = STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_UNSIGN sync_binlog = 1 table_open_cache = 128 thread_cache_size = 50 tmpdir = /opt/udb/instance/mysql-5.7/xxxxxxxx/tmp user = mysql [mysqld_safe] log-error = /opt/udb/instance/mysql-5.7/xxxxxxxx/log/mysqld.log pid-file = /opt/udb/instance/mysql-5.7/xxxxxxxx/mysqld.pid
centos6.5环境安装mysql5.6
操作系统：centos6.5 x86_64
1.检查下linux是不是已经安装了mysql
rpm -qa | grep -i mysql
#如果安装了先卸载旧的版本
rpm -e --nodeps mysql...
2.下载需要的安装包，下载地址：
http://dev.mysql.com/downloads/mysql/5.6.html#downloads
MySQL-client-5.6.34-1.el6.x86_64.rpm
MySQL-devel-5.6.34-1.el6.x86_64.rpm
MySQL-server-5.6.34-1.el6.x86_64.rpm
全部安装
rpm -ivh MySQL-*.rpm
3.修改配置文件位置并做相关设置
cp /usr/share/mysql/my-default.cnf /etc/my.cnf
vi /etc/my.cnf
如果之前的版本有安装，需要重置root密码，可以在my.cnf的mysqld步伐加入，重启mysql，不输入密码即可进数据库
skip-grant-tables
密码默认位置：
# cat /root/.mysql_secret
4.初始化MySQL及设置密码
/usr/bin/mysql_install_db
service mysql start
可能碰到的错误：
明明已经修改了mysql.user表中的root密码，执行命令报错：
mysql> show databases;
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement
mysql> use mysql;
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement
解决办法：
mysql> SET PASSWORD = PASSWORD('123');
Query OK, 0 rows affected (0.00 sec)