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。
