Fix TLS verification error caused by mariadb-connector-c v3.4

[taketo1113]

Summary

Fixes the following error that occurs during rails db:migrate (make init):

ActiveRecord::ConnectionNotEstablished: TLS/SSL error: self-signed certificate in certificate chain (ActiveRecord::ConnectionNotEstablished)

Changes

• visualization service: Add environment variable MARIADB_TLS_DISABLE_PEER_VERIFICATION = 1

Steps to reproduce

When running rails db:migrate as part of make init, the following error occurs:

$ make pull init
...
docker compose up -d mysql
[+] up 1/1
 ✔ Container sindan-docker-mysql-1 Recreated                                                                                                                                                          1.0s
docker compose run --rm visualization bundle exec rails db:migrate
[+]  1/1t 1/11
 ✔ Container sindan-docker-mysql-1 Running                                                                                                                                                            0.0s
Container sindan-docker-mysql-1 Waiting 
Container sindan-docker-mysql-1 Healthy 
Container sindan-docker-visualization-run-b0ea8bcc2577 Creating 
Container sindan-docker-visualization-run-b0ea8bcc2577 Created 
bin/rails aborted!
ActiveRecord::ConnectionNotEstablished: TLS/SSL error: self-signed certificate in certificate chain (ActiveRecord::ConnectionNotEstablished)
/app/vendor/bundle/ruby/3.4.0/gems/activerecord-8.1.2/lib/active_record/connection_adapters/mysql2_adapter.rb:36:in 'ActiveRecord::ConnectionAdapters::Mysql2Adapter.new_client'
...

Root Cause

Starting from mariadb-connector-c v3.4, MYSQL_OPT_SSL_VERIFY_SERVER_CERT is enabled by default.
https://mariadb.com/docs/release-notes/connectors/c/3.4/3.4.3

Related Issue

• Unable to disable TLS verification when using mariadb-connector-c >= 3.4.0 brianmario/mysql2#1379