Add slowQueryLogConfigTmpl options to use custom slow-log config

[yamatcha]

#803

[Copilot]

Pull Request Overview

This PR adds support for custom slow query log configuration by introducing the slowQueryLogConfigTmpl option and modifying related behavior in the controller and CRDs. Key changes include:

• Updated documentation and CRDs to include the new slowQueryLogConfigTmpl field.
• Modified the FluentBit config map reconciliation to use text/template for processing the slow log configuration.
• Enhanced tests to validate the custom configuration.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
docs/crd_mysqlcluster_v1beta2.md	Updated field descriptions to reflect the new slowQueryLogConfigTmpl option and adjusted behavior for the disableSlowQueryLogContainer flag.
controllers/mysqlcluster_controller_test.go	Added tests to verify the custom configuration is properly reconciled in the slow-log ConfigMap.
controllers/mysqlcluster_controller.go	Replaced fmt.Sprintf with text/template parsing and execution to support custom slow query log templates.
config/crd/tests/apiextensions.k8s.io_v1_customresourcedefinition_mysqlclusters.moco.cybozu.com.yaml	Updated CRD to include the slowQueryLogConfigTmpl field.
config/crd/bases/moco.cybozu.com_mysqlclusters.yaml	Updated CRD base definitions to add the slowQueryLogConfigTmpl field.
api/v1beta2/zz_generated.deepcopy.go, api/v1beta2/mysqlcluster_types.go	Added deepcopy logic and API type support for the new slowQueryLogConfigTmpl field.

[Copilot]

Consider checking the error returned by t.Execute. Failing to capture and handle this error could lead to unnoticed issues during template execution.

Suggested change

	t.Execute(confVal, struct{ Path string }{Path: filepath.Join(constants.LogDirPath, constants.MySQLSlowLogName)})
	if err := t.Execute(confVal, struct{ Path string }{Path: filepath.Join(constants.LogDirPath, constants.MySQLSlowLogName)}); err != nil {
	return fmt.Errorf("failed to execute config template: %w", err)
	}

[shunki-fujita]

Also check that dummyKey/value is included.