$ docker-compose up -d
$ docker-compose exec db bash
# cd /tmp
# wget http://mysqltuner.pl/ -O mysqltuner.pl
# wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/basic_passwords.txt -O basic_passwords.txt  ＃ passwordチェックをする場合に必要なファイルよくあるパスワード一覧が載ってます。
# wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/vulnerabilities.csv -O vulnerabilities.csv ＃ MySQLの脆弱性情報がまとまっています。

# perl mysqltuner.pl
 >>  MySQLTuner 1.7.20 - Major Hayden <major@mhtx.net>
 >>  Bug reports, feature requests, and downloads at http://mysqltuner.pl/
 >>  Run with '--help' for additional options and output filtering

[--] Skipped version check for MySQLTuner script
Please enter your MySQL administrative login: root
Please enter your MySQL administrative password: 

[OK] Currently running supported MySQL version 8.0.22
[OK] Operating on 64-bit architecture
 
-------- Log file Recommendations ------------------------------------------------------------------
 log_error is set to stderr MT can't read stderr
 
-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA 
[--] Data in InnoDB tables: 48.0K (Tables: 3)
[OK] Total fragmented tables: 0

～省略～

-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
    MySQL was started within the last 24 hours - recommendations may be inaccurate
    Reduce your overall MySQL memory footprint for system stability
    Dedicate this server to your database for highest performance.
    Reduce or eliminate unclosed connections and network issues
    Before changing innodb_log_file_size and/or innodb_log_files_in_group read this: https://bit.ly/2TcGgtU
Variables to adjust:
  *** MySQL's maximum memory usage is dangerously high ***
  *** Add RAM before increasing MySQL buffer variables ***
    innodb_log_file_size should be (=16M) if possible, so InnoDB total log files size equals to 25% of buffer pool size.

command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci --secure-file-priv="/docker-entrypoint-initdb.d"

command: mysqld --innodb-log-file-size=16M --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci --secure-file-priv="/docker-entrypoint-initdb.d"

-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
    MySQL was started within the last 24 hours - recommendations may be inaccurate
    Reduce your overall MySQL memory footprint for system stability
    Dedicate this server to your database for highest performance.
    Reduce or eliminate unclosed connections and network issues

# perl mysqltuner.pl --cvefile=vulnerabilities.csv --user=root --password=password

～省略～
-------- CVE Security Recommendations --------------------------------------------------------------
[OK] NO SECURITY CVE FOUND FOR YOUR VERSION

～省略～

～省略～
-------- CVE Security Recommendations --------------------------------------------------------------
 CVE-2016-3492(<= 5.7.14) : "Unspecified vulnerability in Oracle MySQL 5.5.51 and earlier
～省略～
 CVE-2018-3077(<= 5.7.22) : "Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: DDL). Supported versions that are affected are 5.7.22 and prior and 8.0.11 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)."
 165 CVE(s) found for your MySQL release.
～省略～

General recommendations:
    Restrict Host for 'root'@% to root@SpecificDNSorIp
    UPDATE mysql.user SET host ='SpecificDNSorIp' WHERE user='root' AND host ='%'; FLUSH PRIVILEGES;
    Set up a Secure Password for root@% user: SET PASSWORD FOR 'root'@'%' = PASSWORD('secure_password');
    1 user(s) used basic or weak password from basic dictionary.
    165 CVE(s) found for your MySQL release. Consider upgrading your version !
    MySQL was started within the last 24 hours - recommendations may be inaccurate
    Reduce or eliminate unclosed connections and network issues
Variables to adjust:
    query_cache_size (=0)
    query_cache_type (=0)
    query_cache_limit (> 1M, or use smaller result sets)