phpConfigs ignored in FPM images

Describe your Issue

Overview

The changes introduced in [PR 71] have affected the handling of phpConfigs, leading to some confusion about the expected values in this parameter.

Background

The original purpose of the /usr/local/etc/php-fpm.d directory is to permit customization of php-fpm pool definitions via *.conf files. This is defined under the include parameter in the php-fpm.conf file.

According to the current README, the phpConfigs setting is designed for custom php.ini values. An example provided demonstrates how to change the php memory_limit parameter.

Logs and Errors

In the current deployment of nginx + php-fpm, settings added to phpConfigs appear ineffective.
Following [PR 71], generated configmap files are mounted to the /usr/local/etc/php-fpm.d directory, but this directory is not utilized as a source for ini files. Instead, the php-fpm process reads additional ini files from /usr/local/etc/php/conf.d, similar to the behavior of the PHP-SAPI module for Apache.

Describe your Environment

• Kubernetes distribution: Vanilla v1.23.17

• Helm version: 3.15.4 (using helmfile, 0.168.0)

• Helm Chart Version: 6.2.3

• values.yaml:

...
  phpConfigs:
    opcache-tunning.ini: |-
      opcache.memory_consumption=256
...

Additional context, if any

Workaround

As a temporary solution, I added the following environment variable:

PHP_INI_SCAN_DIR=:/usr/local/etc/php-fpm.d/

This instructs PHP to also search for ini files in /usr/local/etc/php-fpm.d, in addition to /usr/local/etc/php/conf.d. However, this feels like a makeshift workaround.

Suggestion

I suggest introducing an additional Helm value to distinguish between the two functionalities: one for ini settings and another for php-fpm pool settings. This would involve:

• Keeping phpConfigs for custom ini files.
• Adding a distinct parameter for php-fpm pool configurations, such as phpFpmPools.

Start with values.yaml and the changes from PR 71, then trace where phpConfigs is rendered and mounted relative to /usr/local/etc/php-fpm.d and /usr/local/etc/php/conf.d. Verify that ini settings are read by PHP-FPM and that a separate pool-configuration value can be defined and documented without relying on PHP_INI_SCAN_DIR.