ﬁle:///home/fred/ownCloud/Presentations/ORACLE ... · 5/30/2019 Percona Live Austin 2019 - MySQL Shell : the best DBA tool ? ﬁle:///home/fred/ownCloud/Presentations/ORACLE/PerconaLive2019/MySQL

5/30/2019 Percona Live Austin 2019 - MySQL Shell : the best DBA tool ?

file:///home/fred/ownCloud/Presentations/ORACLE/PerconaLive2019/MySQL Shell - Best DBA Tool/MySQL Day - MySQL Shell.html#1 1/55

1 / 55



2 / 552 / 55



Safe Harbor StatementThe following is intended to outline our general product direction. It is intended for information purpose only, and may not beincorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied up inmaking purchasing decisions. The development, release and timing of any features or functionality described for Oracle´s productremains at the sole discretion of Oracle.

Copyright @ 2019 Oracle and/or its affiliates. All rights reserved.

3 / 55



about me - http://about.me/lefred

Who am I ?


4 / 55

http://about.me/lefred



Frédéric Descamps@lefredMySQL EvangelistHacking MySQL since 3.23devops believerliving in Belgium 🇧🇪http://lefred.be


5 / 55

http://lefred.be/



a new tool

MySQL Shell


6 / 55



MySQL ShellThe MySQL Shell is an interactive Javascript, Python, or SQL interface supporting development and administration for the MySQLServer and is a component of the MySQL Server. You can use the MySQL Shell to perform data queries and updates as well as variousadministration operations.


7 / 55



MySQL Shell (2)The MySQL Shell provides:


8 / 55




Both Interactive and Batch operations


9 / 55





Document and Relational Models


10 / 55






CRUD Document and Relational APIs via scripting


11 / 55







Traditional Table, JSON, Tab Separated output results formats


12 / 55








MySQL Standard and X Protocols


13 / 55








MySQL Standard and X Protocols

and more...


14 / 55



MySQL Shell and PythonWhen using the python mode in the Shell, it's possible to use system modules (local).


15 / 55



MySQL Shell and Python (2)Of course this can be any type of modules:


16 / 55



MySQL Shell and Python (2)Of course this can be any type of modules:


17 / 55



we want more !

Extending MySQL Shell


18 / 55



Extending MySQL ShellSince 8.0.16, you have two different ways to extend the MySQL Shell:

using the new Reporting Framework (>= 8.0.16)

create your own modules to extend MySQL Shell

8.0Copyright @ 2019 Oracle and/or its affiliates. All rights reserved.

19 / 55



MySQL Shell User-Defined ReportsYou can create reports that can be called ( ) one time or constantly refreshed ( ).

Example for checking the :


20 / 55



MySQL Shell User-Defined Reports (2)This is a Python file ( ) installed in :

It contains a definition and a registration:


21 / 55



MySQL Shell User-Defined Reports (3)More info:

https://lefred.be/content/using-the-new-mysql-shell-reporting-framework-to-monitor-innodb-cluster/

https://lefred.be/content/mysql-innodb-cluster-recovery-process-monitoring-with-the-mysql-shell-reporting-framework/

Sources of Examples:

https://github.com/lefred/mysql-shell-udr

Pull Requests welcome !


22 / 55

https://lefred.be/content/using-the-new-mysql-shell-reporting-framework-to-monitor-innodb-cluster/

https://lefred.be/content/mysql-innodb-cluster-recovery-process-monitoring-with-the-mysql-shell-reporting-framework/

https://github.com/lefred/mysql-shell-udr



Create your own modules for MySQL ShellFor calling some long statements or group of operations or sometimes to replace a missing functionality.


23 / 55




Recently, somebody pointed out that since the new DD it was not anymore possible to delete all routines for a specific schema.


24 / 55




Recently, somebody pointed out that since the new DD it was not anymore possible to delete all routines for a specific schema.

Jesper explained recently how the MySQL Shell could help here see https://mysql.wisborg.dk/2018/12/02/mysql-8-drop-several-stored-events-procedures-or-functions/


25 / 55

https://mysql.wisborg.dk/2018/12/02/mysql-8-drop-several-stored-events-procedures-or-functions/





26 / 55





27 / 55



Extending MySQL ShellOr for example, retrieve the expiration period of passwords (see https://lefred.be/content/mysql-when-will-the-password-of-my-users-expire/):


28 / 55

https://lefred.be/content/mysql-when-will-the-password-of-my-users-expire/



Extending MySQL ShellAnother example, retrieve the tables potentially fragmented (see https://lefred.be/content/overview-of-fragmented-mysql-innodb-tables/):


29 / 55

https://lefred.be/content/overview-of-fragmented-mysql-innodb-tables/



Extending MySQL ShellRecently somebody complained about the complexity of knowing what are the default values of columns when expressions areused (https://forums.mysql.com/read.php?101,670682,670682):


30 / 55

https://forums.mysql.com/read.php?101,670682,670682



Contribute to MySQL Shell DBA Toolkit ?Get the code from https://github.com/lefred/mysql-shell-mydba and Pull Requests are welcome !


31 / 55

https://github.com/lefred/mysql-shell-mydba



we want even more !

Innotop


32 / 55



InnotopAs maintainer of Innotop, after doing so delayed maintenance, I started a poll on Twitter:


33 / 55



Innotop (2)So Innotop is not dead... but it's very complex to maintain... Perl !


34 / 55




This is maybe the reason there is less and less contributors...


35 / 55




This is maybe the reason there is less and less contributors...

... so and MySQL Shell then ?


36 / 55



Innotop in MySQL Shell


37 / 55


file:///home/fred/ownCloud/Presentations/ORACLE/PerconaLive2019/MySQL Shell - Best DBA Tool/MySQL Day - MySQL Shell.html#1 38/55Copyright @ 2019 Oracle and/or its affiliates. All rights reserved.

00:05

38 / 55



Innotop in MySQL Shell

How to use it ?


39 / 55



How to use this module in MySQL Shell ?The module is available on github: https://github.com/lefred/mysql-shell-innotop


40 / 55

https://github.com/lefred/mysql-shell-innotop





41 / 55





Add in ~/.mysqlsh/mysqlshrc.py:


42 / 55




does it work everywhere ?

Limitations


43 / 55



Limitationsrequires ncurses


44 / 55



Limitationsrequires ncurses

works almost exclusively on Gnu/Linux


45 / 55



I want to contribute !

How to write your own extension ?


46 / 55



Creating you own extensionAll extensions are a single file located in the modules folder:


47 / 55



Skeleton of an extensionEvery extension starts the same way and requires some mandatory modules:


48 / 55





49 / 55




Then you need to specify the shortcuts that calls the functions:


50 / 55






51 / 55





return: name of the module (dummy.py) stdscr: use the same screen (and pass it to the function)


52 / 55



Skeleton of an extension - run()


53 / 55


file:///home/fred/ownCloud/Presentations/ORACLE/PerconaLive2019/MySQL Shell - Best DBA Tool/MySQL Day - MySQL Shell.html#1 54/55Copyright @ 2019 Oracle and/or its affiliates. All rights reserved.

54 / 55



Thank you !

Any Questions ?

share your 💕 for MySQL on social media using


55 / 55

Documents

ﬁle:///home/fred/ownCloud/Presentations/ORACLE ... · 5/30/2019 Percona Live Austin 2019 - MySQL Shell : the best DBA tool ? ﬁle:///home/fred/ownCloud/Presentations/ORACLE/PerconaLive2019/MySQL