fix(deploy): add missing plugin files for mysql-client library in mysql-setup

[AndrewZures]

Checklist

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• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
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Bug Description 🐛

This PR fixes a bug found when running the datahub-mysql-setup job within a kubernetes cluster that connects to a MySQL 8 database instance. It appears the current mysql-setup script uses the mysql-client alpine package that does not include files necessary to support the MySQL caching_sha2_password plugin. An additional package is required to get the setup script to work.

How to Reproduce

1. I am running a MySQL 8.0.32 instance in Azure with the caching_sha2_password plugin active (which occurs by default).

mysql> SELECT VERSION();
+-----------+
| VERSION() |
+-----------+
| 8.0.32    |
+-----------+
1 row in set (0.04 sec)

mysql> SELECT * FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME = 'caching_sha2_password';
+-----------------------+----------------+---------------+----------------+---------------------+----------------+------------------------+--------------------+-----------------------------+----------------+-------------+
| PLUGIN_NAME           | PLUGIN_VERSION | PLUGIN_STATUS | PLUGIN_TYPE    | PLUGIN_TYPE_VERSION | PLUGIN_LIBRARY | PLUGIN_LIBRARY_VERSION | PLUGIN_AUTHOR      | PLUGIN_DESCRIPTION          | PLUGIN_LICENSE | LOAD_OPTION |
+-----------------------+----------------+---------------+----------------+---------------------+----------------+------------------------+--------------------+-----------------------------+----------------+-------------+
| caching_sha2_password | 1.0            | ACTIVE        | AUTHENTICATION | 2.1                 | NULL           | NULL                   | Oracle Corporation | Caching sha2 authentication | GPL            | FORCE       |
+-----------------------+----------------+---------------+----------------+---------------------+----------------+------------------------+--------------------+-----------------------------+----------------+-------------+
1 row in set (0.04 sec)

2. I configured my Kube cluster to connect to my MySQL instance instead of using the default Bitnami chart.

3. When running helm upgrade datahub datahub/datahub --values values.yaml the datahub-mysql-setup job fails on each run with the following error: 🐛

ERROR 1045 (28000): Plugin caching_sha2_password could not be loaded: Error loading shared library /usr/lib/mariadb/plugin/caching_sha2_password.so: No such file or directory
2023/04/25 23:09:18 Command exited with error: exit status 1

The Core Issue 💡

The MariaDB reference is notable as we are connecting to a MySQL instance. I believe this indicates that the mysql client used to execute the SQL DDL cannot find the proper plugin files in its local installation. Upon further investigation, it appears the mysql-client package used in the mysql-setup script is a mariadb client and likely the source of the problem.

I confirmed this client is the source of the error by rebuilding the mysql-setup docker image using its Dockerfile and attempting to manually connect to the same database. And I received the same error.

A Potential Solution 😃

Based on this thread this error has been seen before and the simple solution is to add the mariadb-connector-c package. I added the package in my local container and I was able to connect to the database without error.

Considerations 🤔

• I would love feedback on my approach and I'm very open to alternative ideas! 🎉
• Apologies if I've missed anything in the PR. This is my first contribution to DataHub!

[david-leifker]

LGTM! Thank you!