How to share files between containers in the same kubernetes pod - kubernetes

Question

I have two containers, one running phpfpm and the other running nginx. I'd like the container running nginx to access the webroot files which has css and javascript files. Right now, nginx successfully passes off php requests to phpfpm, but no styles are showing up for instance when the webpage is rendered.
This is running off of minikube on a linux system.
kind: ConfigMap
apiVersion: v1
metadata:
name: php-ini
namespace: mixerapi-docker
data:
php.ini: |
extension=intl.so
extension=pdo_mysql.so
extension=sodium
extension=zip.so
zend_extension=opcache.so
[php]
session.auto_start = Off
short_open_tag = Off
opcache.interned_strings_buffer = 16
opcache.max_accelerated_files = 20000
opcache.memory_consumption = 256
realpath_cache_size = 4096K
realpath_cache_ttl = 600
expose_php = off
---
kind: ConfigMap
apiVersion: v1
metadata:
name: nginx-conf
namespace: mixerapi-docker
data:
default.conf: |-
server {
listen 80;
root /srv/app/webroot/;
index index.php;
location / {
try_files $uri /index.php?$args;
}
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_buffers 16 16k;
fastcgi_buffer_size 32k;
include fastcgi_params;
}
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: php-nginx-deployment
namespace: mixerapi-docker
labels:
app: php-nginx
spec:
replicas: 1
selector:
matchLabels:
app: php-nginx
template:
metadata:
labels:
app: php-nginx
spec:
containers:
- name: php
image: mixerapidev/demo:latest
imagePullPolicy: Always
ports:
- containerPort: 9000
env:
- name: DATABASE_URL
valueFrom:
secretKeyRef:
name: php-secret
key: database-url
- name: SECURITY_SALT
valueFrom:
secretKeyRef:
name: php-secret
key: cakephp-salt
volumeMounts:
- name: php-ini
mountPath: /usr/local/etc/php/conf.d
- name: php-application
mountPath: /application
- name: nginx
image: nginx:1.19-alpine
ports:
- containerPort: 80
volumeMounts:
- name: nginx-conf
mountPath: /etc/nginx/conf.d
- name: php-application
mountPath: /application
volumes:
- name: php-ini
configMap:
name: php-ini
- name: php-application
persistentVolumeClaim:
claimName: php-application-pv-claim
- name: nginx-conf
configMap:
name: nginx-conf
items:
- key: default.conf
path: default.conf
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: php-application-pv-claim
namespace: mixerapi-docker
labels:
app: php-nginx
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
---
apiVersion: v1
kind: Service
metadata:
name: nginx
namespace: mixerapi-docker
spec:
selector:
app: php-nginx
type: LoadBalancer
ports:
- protocol: TCP
port: 80
targetPort: 80
nodePort: 30002
---
apiVersion: v1
kind: Service
metadata:
name: php
namespace: mixerapi-docker
spec:
selector:
app: php-nginx
ports:
- protocol: TCP
port: 9000
targetPort: 9000

Answer 1

Not sure if this is the best approach, but I based it off of this:
How to share files between containers in the same kubernetes pod
kind: ConfigMap
apiVersion: v1
metadata:
name: php-ini
namespace: mixerapi-docker
data:
php.ini: |
extension=intl.so
extension=pdo_mysql.so
extension=sodium
extension=zip.so
zend_extension=opcache.so
[php]
session.auto_start = Off
short_open_tag = Off
opcache.interned_strings_buffer = 16
opcache.max_accelerated_files = 20000
opcache.memory_consumption = 256
realpath_cache_size = 4096K
realpath_cache_ttl = 600
expose_php = off
---
kind: ConfigMap
apiVersion: v1
metadata:
name: nginx-conf
namespace: mixerapi-docker
data:
default.conf: |-
server {
listen 80;
root /application/webroot/;
index index.php;
location / {
try_files $uri /index.php?$args;
}
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_buffers 16 16k;
fastcgi_buffer_size 32k;
include fastcgi_params;
}
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: php-nginx-deployment
namespace: mixerapi-docker
labels:
app: php-nginx
spec:
replicas: 1
selector:
matchLabels:
app: php-nginx
template:
metadata:
labels:
app: php-nginx
spec:
containers:
- name: php
image: mixerapidev/demo:latest
imagePullPolicy: Always
ports:
- containerPort: 9000
env:
- name: DATABASE_URL
valueFrom:
secretKeyRef:
name: php-secret
key: database-url
- name: SECURITY_SALT
valueFrom:
secretKeyRef:
name: php-secret
key: cakephp-salt
volumeMounts:
- name: php-ini
mountPath: /usr/local/etc/php/conf.d
- name: application
mountPath: /application
lifecycle:
postStart:
exec:
command:
- "/bin/sh"
- "-c"
- >
cp -r /srv/app/. /application/.
- name: nginx
image: nginx:1.19-alpine
ports:
- containerPort: 80
volumeMounts:
- name: nginx-conf
mountPath: /etc/nginx/conf.d
- name: application
mountPath: /application
volumes:
- name: php-ini
configMap:
name: php-ini
- name: nginx-conf
configMap:
name: nginx-conf
items:
- key: default.conf
path: default.conf
- name: application
emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
name: nginx
namespace: mixerapi-docker
spec:
selector:
app: php-nginx
type: LoadBalancer
ports:
- protocol: TCP
port: 80
targetPort: 80
nodePort: 30002
---
apiVersion: v1
kind: Service
metadata:
name: php
namespace: mixerapi-docker
spec:
selector:
app: php-nginx
ports:
- protocol: TCP
port: 9000
targetPort: 9000
I had composer install running in a docker entrypoint, so I needed to move that into the Dockerfile for this to work. I updated my Dockerfile with this and removed install from my entrypoint if the ENV is prod:
RUN if [[ "$ENV" = "prod" ]]; then \
composer install --prefer-dist --no-interaction --no-dev; \
fi