MySQL5.7熱備份-xtrabackup

熱備份
1 xtrabackup下載

wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.9/binary/tarball/percona-xtrabackup-2.4.9-Linux-x86_64.tar.gz
[root@Master_test ~]# ll
total 88192
-rw-------. 1 root root     1201 Feb 16  2017 anaconda-ks.cfg
-rw-r--r--. 1 root root     9913 Feb 16  2017 install.log
-rw-r--r--. 1 root root     3161 Feb 16  2017 install.log.syslog
-rw-r--r--. 1 root root 90282874 Nov 23  2017 percona-xtrabackup-2.4.9-Linux-x86_64.tar.gz

2 目錄結構

[root@Master_test bin]# ll
total 212008
lrwxrwxrwx. 1 root root        10 Jul  6 23:21 innobackupex -> xtrabackup
-rwxr-xr-x. 1 root root   5357661 Nov 23  2017 xbcloud
-rwxr-xr-x. 1 root root      3020 Nov 23  2017 xbcloud_osenv
-rwxr-xr-x. 1 root root   5270021 Nov 23  2017 xbcrypt
-rwxr-xr-x. 1 root root   5344286 Nov 23  2017 xbstream
-rwxr-xr-x. 1 root root 201111701 Nov 23  2017 xtrabackup
[root@Master_test bin]# pwd
/root/percona-xtrabackup-2.4.9-Linux-x86_64/bin
[root@Master_test bin]#

說明：
innobackupex 是要使用的備份工具
xtrabackup是被封裝在innobackupex之中，，innobackupex運行時須要調用它。

3 建立測試數據庫和表

root@Master 23:59:  [(none)]> create database db1;
Query OK, 1 row affected (0.08 sec)

root@Master 23:59:  [(none)]> use db1
Database changed
root@Master 23:59:  [db1]> 
root@Master 23:59:  [db1]> create table  t1(id int,name varchar(20));
Query OK, 0 rows affected (0.08 sec)

root@Master 00:00:  [db1]> desc t1;
+-------+-------------+------+-----+---------+-------+
| Field | Type        | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id    | int(11)     | YES  |     | NULL    |       |
| name  | varchar(20) | YES  |     | NULL    |       |
+-------+-------------+------+-----+---------+-------+

root@Master 00:00:  [db1]> 
root@Master 00:00:  [db1]> insert into t1(id, name) values(1,'zhangsan');
Query OK, 1 row affected (0.00 sec)

root@Master 00:01:  [db1]> insert into t1(id, name) values(2,'lisi');
Query OK, 1 row affected (0.00 sec)

root@Master 00:01:  [db1]> insert into t1(id, name) values(3,'wangwu');
Query OK, 1 row affected (0.00 sec)

root@Master 00:01:  [db1]> select * from t1;
+------+----------+
| id   | name     |
+------+----------+
|    1 | zhangsan |
|    2 | lisi     |
|    3 | wangwu   |
+------+----------+
3 rows in set (0.00 sec)

4 全量備份

1)執行報錯

[root@Master_test bin]# ./innobackupex --user=root --password-root --defaults-file=/etc/my.cnf /bak
./innobackupex: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ./innobackupex)'

2)解決錯誤
呈現該錯誤的緣由是當前的GCC版本中，沒有GLIBCXX_3.4.15，需要安裝更高版本

[root@Master_test bin]# strings /usr/lib64/libstdc++.so.6 | grep GLIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_FORCE_NEW
GLIBCXX_DEBUG_MESSAGE_LENGTH

可見沒有GLIBCXX_3.4.15.

3)下載libstdc
新版本，地址：
32bit
http://ftp.de.debian.org/debian/pool/main/g/gcc-4.7/libstdc++6_4.7.2-5_i386.deb
64bit
http://ftp.de.debian.org/debian/pool/main/g/gcc-4.7/libstdc++6_4.7.2-5_amd64.deb

4)安裝libstdc

[root@Master_test ~]# wget  http://ftp.de.debian.org/debian/pool/main/g/gcc-4.7/libstdc++6_4.7.2-5_amd64.deb
解壓：
[root@Master_test ~]# ar -x libstdc++6_4.7.2-5_amd64.deb  && tar xvf data.tar.gz
./usr/
./usr/share/
./usr/share/doc/
./usr/lib/
./usr/lib/x86_64-linux-gnu/
./usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.17
./usr/share/doc/libstdc++6
./usr/lib/x86_64-linux-gnu/libstdc++.so.6

5)安裝步驟
切到解決後的目錄，把libstdc++.so.6.0.17拷貝到系統的/usr/lib64下，而後刪除原libstdc++.so.6，把libstdc++.so.6.0.17，軟連接爲libstdc++.so.6。

cd /root/usr/lib/x86_64-linux-gnu
[root@Master_test x86_64-linux-gnu]# ll
total 972
lrwxrwxrwx. 1 root root     19 Jul  7 01:18 libstdc++.so.6 -> libstdc++.so.6.0.17
-rw-r--r--. 1 root root 991600 Jan  7  2013 libstdc++.so.6.0.17
cp libstdc++.so.6.0.17 /usr/lib64
cd /usr/lib64
rm libstdc++.so.6
ln libstdc++.so.6.0.17 libstdc++.so.6
檢查一下
[root@Master_test x86_64-linux-gnu]# strings /usr/lib64/libstdc++.so.6 | grep GLIBCXX  
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_DEBUG_MESSAGE_LENGTH
已經有了GLIBCXX_3.4.15。

5 執行全量備份
--user:鏈接數據庫的用戶名
--password:鏈接數據的密碼
--defaults-file:配置文件(必須放在最前面，不然會報錯)
/bak:備份文件的位置

[root@Master_test bin]# ./innobackupex  --defaults-file=/etc/my.cnf --user=root --password=root /bak
180707 01:28:04 innobackupex: Starting the backup operation

IMPORTANT: Please check that the backup run completes successfully.
           At the end of a successful backup run innobackupex
           prints "completed OK!".

180707 01:28:04  version_check Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup;port=3306;mysql_socket=/tmp/mysql.sock' as 'root'  (using password: YES).
Failed to connect to MySQL server as DBD::mysql module is not installed at - line 1327.
180707 01:28:04 Connecting to MySQL server host: localhost, user: root, password: set, port: 3306, socket: /tmp/mysql.sock
Using server version 5.7.22-log
./innobackupex version 2.4.9 based on MySQL server 5.7.13 Linux (x86_64) (revision id: a467167cdd4)
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /data/mysql/mysql3306/data
xtrabackup: open files limit requested 65535, set to 65535
xtrabackup: using the following InnoDB configuration:
xtrabackup:   innodb_data_home_dir = .
xtrabackup:   innodb_data_file_path = ibdata1:1G:autoextend
xtrabackup:   innodb_log_group_home_dir = ./
xtrabackup:   innodb_log_files_in_group = 2
xtrabackup:   innodb_log_file_size = 1073741824
xtrabackup: using O_DIRECT
InnoDB: Number of pools: 1
180707 01:28:05 >> log scanned up to (2597729)
xtrabackup: Generating a list of tablespaces
InnoDB: Allocated tablespace ID 24 for db1/t1, old maximum was 0
180707 01:28:05 [01] Copying ./ibdata1 to /bak/2018-07-07_01-28-04/ibdata1
180707 01:28:06 >> log scanned up to (2597729)
180707 01:28:07 >> log scanned up to (2597729)
180707 01:28:08 >> log scanned up to (2597729)
省略中間信息*****************************************************************
180707 01:28:45 [01] Copying ./sys/statements_with_sorting.frm to /bak/2018-07-07_01-28-04/sys/statements_with_sorting.frm
180707 01:28:45 [01]        ...done
180707 01:28:45 [01] Copying ./sys/x@0024ps_digest_95th_percentile_by_avg_us.frm to /bak/2018-07-07_01-28-04/sys/x@0024ps_digest_95th_percentile_by_avg_us.frm
180707 01:28:45 [01]        ...done
180707 01:28:45 >> log scanned up to (2597729)
180707 01:28:45 [01] Copying ./sys/x@0024wait_classes_global_by_avg_latency.frm to /bak/2018-07-07_01-28-04/sys/x@0024wait_classes_global_by_avg_latency.frm
180707 01:28:45 [01]        ...done
180707 01:28:45 Finished backing up non-InnoDB tables and files
180707 01:28:45 [00] Writing /bak/2018-07-07_01-28-04/xtrabackup_binlog_info
180707 01:28:45 [00]        ...done
180707 01:28:45 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
xtrabackup: The latest check point (for incremental): '2597720'
xtrabackup: Stopping log copying thread.
.180707 01:28:45 >> log scanned up to (2597729)

180707 01:28:46 Executing UNLOCK TABLES
180707 01:28:46 All tables unlocked
180707 01:28:46 [00] Copying ib_buffer_pool to /bak/2018-07-07_01-28-04/ib_buffer_pool
180707 01:28:46 [00]        ...done
180707 01:28:46 Backup created in directory '/bak/2018-07-07_01-28-04/'
MySQL binlog position: filename 'mybinlog.000003', position '1311', GTID of the last change 'fe259816-8122-11e8-ab02-000c29fa3266:1-6'
180707 01:28:46 [00] Writing /bak/2018-07-07_01-28-04/backup-my.cnf
180707 01:28:46 [00]        ...done
180707 01:28:46 [00] Writing /bak/2018-07-07_01-28-04/xtrabackup_info
180707 01:28:46 [00]        ...done
xtrabackup: Transaction log of lsn (2597720) to (2597729) was copied.
180707 01:28:46 completed OK!