Cool MariaDB Plugins
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This document discusses MariaDB plugins and provides examples of several useful plugins, including authentication plugins, password validation plugins, SQL error logging, audit logging, query analysis, and more. It encourages contributing plugins to help extend MariaDB's functionality.
![SHOW PLUGINS
MariaDB [(none)]> SHOW PLUGINS;
+-------------------------------+----------+--------------------
+------------------------+---------+
| Name | Status | Type | Library
| License |
+-------------------------------+----------+--------------------
+------------------------+---------+
| mysql_native_password | ACTIVE | AUTHENTICATION | NULL
| GPL |
| USER_STATISTICS | ACTIVE | INFORMATION SCHEMA | NULL
| GPL |
| InnoDB | ACTIVE | STORAGE ENGINE | NULL
| GPL |
| QUERY_RESPONSE_TIME_AUDIT | ACTIVE | AUDIT |
query_response_time.so | GPL |](https://image.slidesharecdn.com/coolmariadbplugins-151020142053-lva1-app6891/85/Cool-MariaDB-Plugins-2-320.jpg)
![SQL Error Logging
• Collect errors sent to the client and have it sent to a log file
2015-10-12 13:12:54 msandbox[msandbox] @
localhost [] ERROR 1286: Unknown storage
engine 'AMS' : CREATE TABLE test (id int)
ENGINE=AMS
2015-10-12 13:17:06 msandbox[msandbox] @
localhost [] ERROR 1126: Can't open shared
library '/home/byte/binaries/10.1.7/lib/
plugin/sql_errorlog.so' (errno: 11, cannot
open shared object file: No such file or
directory) : install soname 'sql_errorlog'](https://image.slidesharecdn.com/coolmariadbplugins-151020142053-lva1-app6891/85/Cool-MariaDB-Plugins-8-320.jpg)
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Cool MariaDB Plugins
- 1. Cool MariaDB Plugins Colin Charles [email protected] http://bytebot.net/blog/ | @bytebot on twitter http://mariadb.org/ | http://mariadb.com/ MySQL NL User Group, Amsterdam, Netherlands 12 October 2015
- 2. SHOW PLUGINS MariaDB [(none)]> SHOW PLUGINS; +-------------------------------+----------+-------------------- +------------------------+---------+ | Name | Status | Type | Library | License | +-------------------------------+----------+-------------------- +------------------------+---------+ | mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL | | USER_STATISTICS | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL | | QUERY_RESPONSE_TIME_AUDIT | ACTIVE | AUDIT | query_response_time.so | GPL |
- 3. Great way to contribute • MySQL AB • R.J.Silk, Sergei Golubchik • Codership Oy • Brian Aker, MySQL AB • Percona and Sergei Golubchik • Oracle Corporation • Percona Inc. • MariaDB Corporation • Google Inc • Sergei Golubchik • Marc Alff, Oracle • Monty Program Ab • Mikael Ronstrom, MySQL AB • Roberto Spadim, Spaempresarial - Brazil • Patrick Galbraith • Alexey Botchkov • Percona and Sergey Vojtovich • Alexey Botchkov (MariaDB Corporation) • Sphinx developers • Oracle Corp • Denis Endro eperi GmbH • Jonas Oreland • Tokutek Inc • Patrick Galbraith and Brian Aker, MySQL AB • higuchi dot akira at dena dot jp • Roland Bouman • Nirbhay Choubey • Horst Hunger • Georgi Kodinov • He Zhenxing • The Mroonga project • Brian Aker • Kentoku Shiba
- 4. Getting started • INSTALL PLUGIN plugin_name SONAME ‘plugin_library.so’ • INSTALL SONAME ‘plugin_library’ • mysql_plugin • In MariaDB: INFORMATION_SCHEMA.ALL_PLUGINS
- 5. auth_socket • Connect via the Unix socket • CREATE USER monty IDENTIFIED VIA unix_socket; • Debian/Ubuntu use this by default • Listen to Otto’s talk
- 6. PAM Authentication • INSTALL SONAME ‘auth_pam'; • CREATE USER username@hostname IDENTIFIED VIA pam; • Dialog & “cleartext” (for MySQL client libraries) • 2-factor authentication entirely possible
- 7. Password validation • INSTALL SONAME ‘simple_password_check.so'; • a password is required to be at least eight characters, and requires at least one digit, one uppercase character, one lowercase character, and one character that is neither a digit nor a letter. • INSTALL SONAME 'cracklib_password_check';
- 8. SQL Error Logging • Collect errors sent to the client and have it sent to a log file 2015-10-12 13:12:54 msandbox[msandbox] @ localhost [] ERROR 1286: Unknown storage engine 'AMS' : CREATE TABLE test (id int) ENGINE=AMS 2015-10-12 13:17:06 msandbox[msandbox] @ localhost [] ERROR 1126: Can't open shared library '/home/byte/binaries/10.1.7/lib/ plugin/sql_errorlog.so' (errno: 11, cannot open shared object file: No such file or directory) : install soname 'sql_errorlog'
- 9. Audit Plugin • INSTALL PLUGIN server_audit SONAME ‘server_audit'; • server_audit=FORCE_PLUS_PERMANENT • 5 types of log records: CONNECTION, QUERY, TABLES, QUERY_DDL (filters CREATE, ALTER, etc.), QUERY_DML (filters INSERT, UPDATE, etc.) • server_audit_events in my.cnf • User filtering: server_audit_excl_users=monty
- 10. What’s in the query cache? • See the contents of the query cache, in the I_S database, a new QUERY_CACHE_INFO table • Acquires the query cache lock, so lock waits for queries using/expiring the cache
- 11. Query response time distribution • Find a large number of queries that each take a very short amount of time to execute • INSTALL SONAME ‘query_response_time'; • SHOW QUERY_RESPONSE_TIME; • SET GLOBAL query_response_time_flush =1;
- 12. A few more… • locales - list all compiled-in locales • metadata_lock_info - show active metadata locks (lock modes, lock type, and table schema) • wsrep_info - see WSREP_MEMBERSHIP, WSREP_STATUS
- 13. feedback=ON
- 14. Plugins are cool • Don’t forget there’s also the enhanced semi- synchronous replication plugin • SphinxSE is a pluggable “interface” that’s an engine that connects to a sphinx daemon for FTS • And many engines come in as plugins
- 15. Thanks! Colin Charles [email protected] http://bytebot.net/blog/ | @bytebot on twitter http://mariadb.org/ | http://mariadb.com/ MySQL NL User Group, Amsterdam, Netherlands 12 October 2015