技术分享 | MySQL5.7 与 MariaDB10.1 审计插件兼容性验证

# 安装插件示例
# 获取 MariaDB 安装包
https://mariadb.org/download/

# 上传并解压安装包
[root@10-186-60-13 10.1.11]# tar -zxvf mariadb-10.1.11-linux-glibc_214-x86_64
[root@10-186-60-13 10.1.11]# ll
total 509368
drwxr-xr-x 33 1001 1001      4096 Jan 28  2016 mariadb-10.1.11
drwxrwxr-x 13 1021 1004       321 Jan 29  2016 mariadb-10.1.11-linux-glibc_214-x86_64
-rw-r--r--  1 root root 466400911 Jul 19 09:58 mariadb-10.1.11-linux-glibc_214-x86_64.tar.gz
-rw-r--r--  1 root root  55184229 Jul 19 09:57 mariadb-10.1.11.tar.gz

# 获取 server_audit.so
[root@10-186-60-13 10.1.11]# cd mariadb-10.1.11-linux-glibc_214-x86_64/lib/plugin/

# 复制该插件到 MySQL 的 plugin 目录下并修改权限
[root@10-186-60-13 plugin]# cp server_audit.so /data/mysql/base/5.7.33/lib/plugin/
[root@10-186-60-13 plugin]# cd /data/mysql/base/5.7.33/lib/plugin/
[root@10-186-60-13 plugin]# chmod 755 server_audit.so

# 登录到 MySQL 客户端进行插件的安装
[root@10-186-60-13 plugin]# /data/mysql/base/5.7.33/bin/mysql -uroot -p -S /data/mysql/data/3306/mysqld.sock
mysql> install plugin server_audit SONAME 'server_audit.so';
Query OK, 0 rows affected (0.01 sec)

# 检查是否安装成功，若不兼容此时 MySQL 会发生 Crash
mysql> show plugins; 
| SERVER_AUDIT  | ACTIVE   | AUDIT | server_audit.so    | GPL
mysql> show plugins;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/data/mysql/data/3308/mysqld.sock' (111)
ERROR: 
Can't connect to the server
 
# 查看审计插件情况，开启审计插件，刷新审计插件 log 文件，验证插件可用性
mysql> show variables like'%audit%'; 
mysql> set global server_audit_logging=on;
mysql> set global server_audit_file_rotate_now =on;
Query OK, 0 rows affected (0.00 sec)

# 检查 data 下是否有审计日志文件输出
[root@10-186-60-13 ~]# cd /data/mysql/data/3306/
[root@10-186-60-13 3306]# ll  # 观察到有 server_audit.log 文件输出则插件开启成功
-rw-r----- 1 actiontech-mysql    actiontech-mysql      53236 Jul 19 11:10 server_audit.log
-rw-r----- 1 actiontech-mysql    actiontech-mysql      79363 Jul 19 11:10 server_audit.log.1

# 卸载该审计插件，进行其他版本适配验证
mysql> uninstall plugin server_audit;

# 检查插件可用状态，为 DELETED 则是卸载成功
mysql> show plugins;
| SERVER_AUDIT | DELETED  | AUDIT   | server_audit.so  | GPL


# 通过刷新审计日志验证是否卸载成功
mysql> set global server_audit_file_rotate_now =on;
ERROR 1193 (HY000): Unknown system variable 'server_audit_file_rotate_now'
[root@10-186-60-13 ~]# cd /data/mysql/base/5.7.33/lib/plugin/  

# 删除审计插件，清理 log 文件，重启 MySQL
[root@10-186-60-13 plugin]# rm -rf server_audit.so
[root@10-186-60-13 3306]# rm -rf server_audit.log
[root@10-186-60-13 plugin]# systemctl restart mysqld_3306

# 安装审计插件
mysql> install plugin server_audit SONAME 'server_audit.so';
ERROR 2013 (HY000): Lost connection to MySQL server during query

# 检查插件安装情况
mysql>  show plugins;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/data/mysql/data/3308/mysqld.sock' (111)
ERROR: 
Can't connect to the server

# 检查错误日志，发现发生了 Crash
Version: '5.7.39-log'  socket: '/data/mysql/data/3308/mysqld.sock'  port: 3308  MySQL Community Server (GPL)
230719 13:37:36 server_audit: MariaDB Audit Plugin version 1.4.7 STARTED.
05:37:36 UTC - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
Attempting to collect some information that could help diagnose the problem.
As this is a crash and something is definitely wrong, the information
collection process might fail.
key_buffer_size=16777216
read_buffer_size=8388608
max_used_connections=23
max_threads=2000
thread_count=17
connection_count=17
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 20523165 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x7fcf7469d380
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 7fcfd411fe68 thread_stack 0x40000
/data/mysql/base/5.7.39/bin/mysqld(my_print_stacktrace+0x35)[0xf80e15]
/data/mysql/base/5.7.39/bin/mysqld(handle_fatal_signal+0x4b9)[0x7ff999]
/lib64/libpthread.so.0(+0xf6d0)[0x7fd0394ff6d0]
/data/mysql/base/5.7.39/lib/plugin/server_audit.so(get_db_mysql57+0x2f)[0x7fcfe32b852f]
/data/mysql/base/5.7.39/lib/plugin/server_audit.so(+0xb63b)[0x7fcfe32b863b]
/data/mysql/base/5.7.39/bin/mysqld(_Z18mysql_audit_notifyP3THD30mysql_event_general_subclass_tPKciS3_m+0x2f1)[0x801ff1]
/data/mysql/base/5.7.39/bin/mysqld(my_message_sql+0x134)[0x7f1be4]
/data/mysql/base/5.7.39/bin/mysqld(my_error+0xe0)[0xf7bc30]
/data/mysql/base/5.7.39/bin/mysqld(_ZN7handler11print_errorEii+0x641)[0x851c11]
/data/mysql/base/5.7.39/bin/mysqld[0xd66950]
/data/mysql/base/5.7.39/bin/mysqld(_ZN22Sql_cmd_install_plugin7executeEP3THD+0x23)[0xd66a53]
/data/mysql/base/5.7.39/bin/mysqld(_Z21mysql_execute_commandP3THDb+0xe50)[0xd41750]
/data/mysql/base/5.7.39/bin/mysqld(_Z11mysql_parseP3THDP12Parser_state+0x3cd)[0xd45c7d]
/data/mysql/base/5.7.39/bin/mysqld(_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command+0x1780)[0xd474a0]
/data/mysql/base/5.7.39/bin/mysqld(_Z10do_commandP3THD+0x194)[0xd48064]
/data/mysql/base/5.7.39/bin/mysqld(handle_connection+0x2ac)[0xe1b58c]
/data/mysql/base/5.7.39/bin/mysqld(pfs_spawn_thread+0x174)[0x143c5a4]
/lib64/libpthread.so.0(+0x7e25)[0x7fd0394f7e25]
/lib64/libc.so.6(clone+0x6d)[0x7fd037fb1bad]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (7fcf74be91a0): install plugin server_audit SONAME 'server_audit.so'
Connection ID (thread ID): 300
Status: NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.

# 发生 Crush 后先删除插件
[root@10-186-60-13 plugin]# rm -rf server_audit.so

# 重启 MySQL 服务并进行登录验证
[root@10-186-60-13 plugin]# systemctl restart mysqld_3308
[root@10-186-60-13 plugin]# /data/mysql/base/5.7.39/bin/mysql -uroot -p -S /data/mysql/data/3308/mysqld.sock

# 解压安装包
[root@10-186-60-13 mariadb-10.1.48]# yum install -y openssl libssl-dev build-essential bison libncurses-dev cmake gcc-gcc+ git ncurses-devel   

# 安装编译所需依赖
[root@10-186-60-13 10.1.48]# tar -zxvf mariadb-10.1.48.tar.gz
[root@10-186-60-13 10.1.48]# cd mariadb-10.1.48/plugin/server_audit/   
[root@10-186-60-13 server_audit]# vim server_audit.c  

# 打开 server_audit.c 文件
db_off= 536;     // 将 536 修改为 544，其他不变
db_len_off= 544; // 将 544 修改为 552，其他不变

# 返回源文件根目录进行编译安装
[root@10-186-60-13 server_audit]# cd ../..  
cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql \
-DMYSQL_DATADIR=/mydata/data \
-DWITH_INNOBASE_STORAGE_ENGINE=1 \
-DWITH_ARCHIVE_STORAGE_ENGINE=1 \
-DWITH_BLACKHOLE_STORAGE_ENGINE=1 \
-DWITH_READLINE=1 \
-DWITH_SSL=system \
-DWITH_ZLIB=system \
-DWITH_LIBWRAP=0 \
-DMYSQL_UNIX_ADDR=/tmp/mysql.sock \
-DDEFAULT_CHARSET=utf8 \
-DDEFAULT_COLLATION=utf8_general_ci

# 执行 make 进行编译安装
[root@10-186-60-13 server_audit]# make

# MariaDB 10.1.41，插件版本为 1.4.7
mysql> install plugin server_audit SONAME 'server_audit.so';
ERROR 1030 (HY000): Got error 1 from storage engine