Original ip is not passed to containers [Linux version]

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Refering to a similar problem seen in docker for-mac
I'm using Apache inside an alpine docker-container within kubernetes node replication environnement
This container use ProxyPassMatch to serve the php container

Within the php container i try to gather the user's IP with echo $_SERVER["REMOTE_ADDR"].
The ouput shows the IP of the node hosting the container instead of the ip of the end user

Steps to reproduce the issue:

1. Run any apache container and default php_fpm container on the same node.
2. Connect both container by adding the config ProxyPassMatch ^/(..php(/.)?)$ fcgi://localhost:9000/
3. Create a php file on the php container:

Result will be the adress of the node instead of the client

**Additional information you deem important **

Output of docker version:

(paste your output here)

Output of docker info:

(paste your output here)

Additional environment details (AWS, VirtualBox, physical, etc.):

Start by reproducing the setup with an Apache container, a PHP-FPM container, Kubernetes node replication, and the stated ProxyPassMatch configuration. Inspect how the client address reaches PHP's $_SERVER["REMOTE_ADDR"]; done means the PHP container reports the end user's IP instead of the hosting node's address.