TLS/SSL error: Hostname verification failed with ruby:3.2.9-alpine3.23 docker image (mariadb-dev-11.4.9-r0)

[hiroshi]

Just FYI.

I have been experiencing TLS/SSL error: Hostname verification failed when connecting to Google Cloud SQL MySQL with client cert.

Rolled back deployment then investigating both a worked image and not one.
I found differences in those ruby:3.2.9-alpine based images:

Worked:

• ruby:3.2.9-alpine3.22 (alpine 3.22.2)
• mysql-dev mariadb-dev-11.4.9-r0

Errored:

• ruby:3.2.9-alpine3.23 (alpine 3.23.0)
• mysql-dev mariadb-dev-11.4.8-r0

As a workaround I changed base image

- FROM ruby:3.2.9-alpine
+ FROM ruby:3.2.9-alpine-3.22

I'll report if I found something else.

edit: both using mysql2 (0.5.7) and connecting to MySQL 5.7.44