K
Q

How to add php.ini to a configmap in kubernetes yaml

4/10/2020

Hello I am new to kubernetes. I am currently stuck trying to use a docker image from dockerhub were it is a php-fpm image. I would like to be able to customize the php.ini in a configmap how would I go about doing that. The image on dockerhub is crunchgeek/php-fpm and the instructions for php.ini say there is a environment variable "PHP_INI_PATH=/path/to/php.ini will include specified php.ini configuration during php-fpm manager start. It allows to use a wildcard in case you would like to include several .ini configuration files." How can I add a environment variable that controls the php.ini file to a configmap in kubernetes please a yaml example would help me so much thanks.

-- Jean loriston
configmap
dockerhub
kubernetes
php
yaml

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2 Answers

4/10/2020

First you'll need to define the ConfigMap representing your php.ini, something like this:

apiVersion: v1
kind: ConfigMap
metadata:
  name: php-ini-config
  namespace: default
data:
  php.ini: |
    foo=bar
    one=two

Then you can render this configmap into your workload as a volume, which looks something like this:

apiVersion: v1
kind: Pod
metadata:
  name: test-pod
  namespace: default
spec:
  containers:
    - name: test-container
      image: k8s.gcr.io/busybox
      command: [ "/bin/sh", "-c", "cat /etc/config/php.ini" ]
      volumeMounts:
      - name: config-volume
        mountPath: /etc/config
      env:
      - name: PHP_INI_PATH
        value: /etc/config/php.ini
  volumes:
    - name: config-volume
      configMap:
        name: php-ini-config

Notice in this YAML we also include the PHP_INI_PATH environment variable pointing to the file under the volume, /etc/config/php.ini.

-- snormore
Source: StackOverflow
4/10/2020

In case you want to mount a configuration file of PHP .ini (creating a configmap from file) to your pod can do the following depends on if you're using helm or not.

When using helm you need to create a config map YAML file and put the desired configuration file (php.ini in your scenario) under a dedicated folder, (e.g conf folder) in the root of your helm Chart location, and then create a config map from that file and mount it to the deployment accordingly to your needs.

In case you are not using helm you can create the config map from a file directly using a kubectl command (took from this reference config map from file command):

create a config map from file with no helm:

kubectl create configmap phpini-configmap --from-file=configure-pod-container/configmap/php.ini

config map YAML when using helm would look similar to:

apiVersion: v1
kind: ConfigMap
metadata:
  name: phpini-configmap
data:
  php.ini: |-
{{ .Files.Get "conf/php.ini" | indent 4 }}

The pod should then consume this config map and mount it to the right path

apiVersion: v1
kind: Pod
metadata:
  name: test-pod
  namespace: default
spec:
  containers:
    - name: php-container
      image: k8s.gcr.io/busybox
      command: [ "/bin/sh", "-c", "cat /etc/config/php.ini" ]
      volumeMounts:
      - name: ini-configmap
        mountPath: /etc/config/php.ini
        subPath: php.ini
      env:
      - name: PHP_INI_PATH
        value: /etc/config/php.ini
  volumes:
    - name: ini-configmap
      configMap:
        name: phpini-configmap
-- Mickey Hovel
Source: StackOverflow