Fix mariadb config file permissions and restart pod on config change

[olliewalsh]

Mariadb is using default conf as the conf file is not readable by the mysql user. Also pass the config hash as an env to the pod to ensure it is recreated when the config changes.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: olliewalsh

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [olliewalsh]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[olliewalsh]

@dciabrin is this also an issue for the galera controller?

[dciabrin]

Yes the galera pod is started as root as well and mysqld switches to user mysql, so the owner of this file is still root.

[dciabrin]

Heads up, in TripleO all files under /etc/my.cnf.d are owned by root, and this config is also owned by root with perms 644.
I think this is what we want here as well, and I did the same for the galera CR.

[openshift-merge-robot]

PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[openshift-ci]

@olliewalsh: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/images	70a2d67	link	true	/test images
ci/prow/precommit-check	70a2d67	link	true	/test precommit-check
ci/prow/unit	70a2d67	link	true	/test unit
ci/prow/mariadb-operator-build-deploy-kuttl	70a2d67	link	true	/test mariadb-operator-build-deploy-kuttl
ci/prow/functional	70a2d67	link	true	/test functional

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.