Using the new MySQL Shell Reporting Framework to monitor InnoDB Cluster

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With MySQL Shell 8.0.16, a new very interesting feature was released: the Reporting Framework.

Jesper already blogged about it and I recommend you to read his articles if you are interested in writing your own report:

• https://mysql.wisborg.dk/2019/04/26/mysql-shell-8-0-16-built-in-reports/
• https://mysql.wisborg.dk/2019/04/27/mysql-shell-8-0-16-user-defined-reports/

I this post, I will show you one user-defined report that can be used to monitor your MySQL InnoDB Cluster / Group Replication.

Preparation

Before being able to use the report, you need to download 2 files. The first one is the addition in systhat I often use to monitor MySQL InnoDB Cluster:

And the second one is the report:

Once downloaded, you can unzip them and install them:

On your Primary-Master run:

mysqlsh --sql clusteradmin@mysql1 < addition_to_sys_GR.sql

Now install the report on your MySQL Shell client’s machine:

$ mdkir -p ~/.mysqlsh/init.d
mv gr_info.py ~/.mysqlsh/init.d

Usage

Once installed, you just need to relaunch the Shell and you are ready to call the new report using the \show command:

Now let’s see the report in action when I block all writes on mysql2 with a FTWRL and call the report with \watch:

Conclusion

Yet another nice addition to MySQL Shell. With this report you can see which member still has quorum, how many transactions each nodes have to apply, …

Don’t hesitate to also share your reports too !

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