升级前后版本：
MySQL 原版本mysql-5.6.35 mysql> select version(); +------------+ | version() | +------------+ | 5.6.35-log | +------------+ 1 row in set (0.01 sec) 升级后版本 mysql-5.7.20 升级步骤：
确认依赖包
yum list installed|grep perl-Module-Install.noarch libaio libaio-devel gcc gcc-c++ make cmake automake autoconf libxml2 libxml2-devel zlib zlib-devel ncurses ncurses-devel 创建MySQL 5.7相关目录以及备份文件
mkdir -p /opt/mysql57/ mv mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz /opt/mysql57 cp -r /home/my3306 /home/my3307 解压二进制包
[root@172-16-10-93 /opt/mysql57] #ls mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz [root@172-16-10-93 /opt/mysql57] #tar -zxvf mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz [root@172-16-10-93 /opt/mysql57] #ll total 626112 drwxr-xr-x 9 root root 4096 Jan 1 21:26 mysql-5.7.20-linux-glibc2.12-x86_64 -rw-r--r-- 1 root root 641127384 Jan 1 20:34 mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz [root@172-16-10-93 /opt/mysql57] #ln -s mysql-5.7.20-linux-glibc2.12-x86_64 mysql [root@172-16-10-93 /opt/mysql57] #ll total 626112 lrwxrwxrwx 1 root root 35 Jan 1 21:27 mysql -> mysql-5.7.20-linux-glibc2.12-x86_64 drwxr-xr-x 9 root root 4096 Jan 1 21:26 mysql-5.7.20-linux-glibc2.12-x86_64 -rw-r--r-- 1 root root 641127384 Jan 1 20:34 mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz [root@172-16-10-93 /opt/mysql57] #chown -R mysql:mysql /opt/mysql57/ [root@172-16-10-93 /opt/mysql57] #cd .. [root@172-16-10-93 /opt] #ll total 8 lrwxrwxrwx 1 mysql mysql 35 Dec 27 14:58 mysql -> mysql-5.6.35-linux-glibc2.5-x86_64/ drwxr-xr-x 14 mysql mysql 4096 Dec 27 15:20 mysql-5.6.35-linux-glibc2.5-x86_64 drwxr-xr-x 3 mysql mysql 4096 Jan 1 21:27 mysql57
停止旧版本数据库
[root@172-16-10-93 /opt/mysql] #./bin/mysqladmin -h127.0.0.1 shutdown
修改配置文件
[root@172-16-10-93 /home/my3306] #vi my.cnf basedir=/opt/mysql57 datadir=/home/my3307/data tmpdir=/home/my3307/tmp lc_messages_dir=/opt/mysql57/share log-error=/home/my3307/log/alert.log slow_query_log_file=/home/my3307/log/slow.log general_log_file=/home/my3307/log/general.log socket=/home/my3307/run/mysql.sock
启动新版本数据库
[root@172-16-10-93 /opt/mysql] #./bin/mysqld_safe --defaults-file=/home/my3307/my.cnf & [1] 26421 [root@172-16-10-93 /opt/mysql57/mysql] #180101 22:07:54 mysqld_safe Logging to '/home/my3307/log/alert.log'. 180101 22:07:54 mysqld_safe Starting mysqld daemon with databases from /home/my3307/data [root@172-16-10-92 /opt/mysql57] #./bin/mysql -uroot -h127.0.0.1 -P3307 Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.7.20-log MySQL Community Server (GPL) Copyright (c) 2000, 2017, 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 version(); +------------+ | version() | +------------+ | 5.7.20-log | +------------+ 1 row in set (0.00 sec) 这里虽然启动成功了，但是系统启动日志里面有大量的关于系统表的报错 [ERROR] Native table 'performance_schema'.'events_statements_summary_by_program' has the wrong structure
更新系统表
[root@172-16-10-92 /opt/mysql57] #./bin/mysql_upgrade -uroot -h127.0.0.1 -P3307 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. goufu._goufu_del OK goufu.goufu OK sys.sys_config OK Upgrade process completed successfully. Checking if update is needed.
重启MySQL后，查看系统启动日志：
2018-01-01T16:10:24.067876Z 0 [Warning] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release. 2018-01-01T16:10:24.068724Z 0 [Warning] 'NO_AUTO_CREATE_USER' sql mode was not set. 2018-01-01T16:10:24.068770Z 0 [Note] --secure-file-priv is set to NULL. Operations related to importing and exporting data are disabled 2018-01-01T16:10:24.068799Z 0 [Note] /opt/mysql57/bin/mysqld (mysqld 5.7.20-log) starting as process 13720 ... 2018-01-01T16:10:24.074893Z 0 [Note] InnoDB: PUNCH HOLE support available 2018-01-01T16:10:24.074925Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2018-01-01T16:10:24.074933Z 0 [Note] InnoDB: Uses event mutexes 2018-01-01T16:10:24.074938Z 0 [Note] InnoDB: GCC builtin __sync_synchronize() is used for memory barrier 2018-01-01T16:10:24.074944Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3 2018-01-01T16:10:24.074950Z 0 [Note] InnoDB: Using Linux native AIO 2018-01-01T16:10:24.075213Z 0 [Note] InnoDB: Number of pools: 1 2018-01-01T16:10:24.075355Z 0 [Note] InnoDB: Using CPU crc32 instructions 2018-01-01T16:10:24.077561Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M 2018-01-01T16:10:24.086257Z 0 [Note] InnoDB: Completed initialization of buffer pool 2018-01-01T16:10:24.088795Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority(). 2018-01-01T16:10:24.126733Z 0 [Note] InnoDB: Highest supported file format is Barracuda. 2018-01-01T16:10:24.128474Z 0 [Note] InnoDB: Log scan progressed past the checkpoint lsn 1216908889 2018-01-01T16:10:24.128493Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 1216908898 2018-01-01T16:10:24.128501Z 0 [Note] InnoDB: Database was not shutdown normally! 2018-01-01T16:10:24.128507Z 0 [Note] InnoDB: Starting crash recovery. 2018-01-01T16:10:24.358659Z 0 [Note] InnoDB: Last MySQL binlog file position 0 483863024, file name mysql-bin.000004 2018-01-01T16:10:24.469797Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2018-01-01T16:10:24.469823Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2018-01-01T16:10:24.469866Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2018-01-01T16:10:24.595682Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB. 2018-01-01T16:10:24.596733Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active. 2018-01-01T16:10:24.596756Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active. 2018-01-01T16:10:24.597811Z 0 [Note] InnoDB: Waiting for purge to start 2018-01-01T16:10:24.648622Z 0 [Note] InnoDB: 5.7.20 started; log sequence number 1216908898 2018-01-01T16:10:24.649407Z 0 [Note] InnoDB: Loading buffer pool(s) from /home/my3307/data/ib_buffer_pool 2018-01-01T16:10:24.649583Z 0 [Note] InnoDB: Buffer pool(s) load completed at 180102 0:10:24 2018-01-01T16:10:24.649665Z 0 [Note] Plugin 'FEDERATED' is disabled. 2018-01-01T16:10:24.649954Z 0 [Note] Recovering after a crash using mysql-bin 2018-01-01T16:10:24.649976Z 0 [Note] Starting crash recovery... 2018-01-01T16:10:24.650015Z 0 [Note] Crash recovery finished. 2018-01-01T16:10:24.666193Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key 2018-01-01T16:10:24.666219Z 0 [Note] Server hostname (bind-address): '*'; port: 3307 2018-01-01T16:10:24.666263Z 0 [Note] IPv6 is available. 2018-01-01T16:10:24.666281Z 0 [Note] - '::' resolves to '::'; 2018-01-01T16:10:24.666300Z 0 [Note] Server socket created on IP: '::'. 2018-01-01T16:10:24.696638Z 0 [Note] /opt/mysql57/bin/mysqld: ready for connections. Version: '5.7.20-log' socket: '/home/my3307/run/mysql.sock' port: 3307 MySQL Community Server (GPL) 关于系统表的报错已经没有了。 查看系统版本：
mysql> select version(); +------------+ | version() | +------------+ | 5.7.20-log | +------------+ 1 row in set (0.00 sec) 查看数据是否丢失：
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | goufu | | mysql | | performance_schema | | sys | | test | +--------------------+ 6 rows in set (0.00 sec) mysql> use goufu Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select count(*) from goufu; +----------+ | count(*) | +----------+ | 2309577 | +----------+ 1 row in set (0.88 sec) 数据没有丢失升级成功。
