Start: 2023-08-19 11:04:35
Finished: 2023-08-19 11:48:39
The Nautilus Application Development team is planning to deploy one of the php-based applications on Kubernetes cluster. As per the recent discussion with DevOps team, they have decided to use nginx and phpfpm. Additionally, they also shared some custom configuration requirements. Below you can find more details. Please complete this task as per requirements mentioned below:
-
Create a service to expose this app, the service type must be NodePort, nodePort should be 30012.
-
Create a config map named nginx-config for nginx.conf as we want to add some custom settings in nginx.conf.
a) Change the default port 80 to 8092 in nginx.conf.
b) Change the default document root /usr/share/nginx to /var/www/html in nginx.conf.
c) Update the directory index to index index.html index.htm index.php in nginx.conf.
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Create a pod named nginx-phpfpm.
a) Create a shared volume named shared-files that will be used by both containers (nginx and phpfpm) also it should be a emptyDir volume.
b) Map the ConfigMap we declared above as a volume for nginx container. Name the volume as nginx-config-volume, mount path should be /etc/nginx/nginx.conf and subPath should be nginx.conf
c) Nginx container should be named as nginx-container and it should use nginx:latest image. PhpFPM container should be named as php-fpm-container and it should use php:7.4-fpm-alpine image.
d) The shared volume shared-files should be mounted at /var/www/html location in both containers. Copy /opt/index.php from jump host to the nginx document root inside the nginx container, once done you can access the app using App button on the top bar.
Before clicking on finish button always make sure to check if all pods are in running state.
You can use any labels as per your choice.
Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.
Start off by checking any existing resources.
thor@jump_host ~$ k get all
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 22m Create the configMap based on the requirements. Ensure to foolow the specified listen port, index, and root directory.
thor@jump_host ~$ cat > configmap.yml
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx-config
data:
nginx.conf: |
events {}
http {
server {
listen 8092;
index index.html index.htm index.php;
root /var/www/html;
location ~ \.php$ {
include fastcgi_params;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_pass 127.0.0.1:9000;
}
}
} Apply and verify.
k apply -f . thor@jump_host ~$ k get cm
NAME DATA AGE
kube-root-ca.crt 1 26m
nginx-config 1 5s Next, create the service and pod for the two containers. Take note of the portand targetPort in the service. It should match the listen port in the configMap created previously. In addition, make sure that you're using the correct image name and tags.
thor@jump_host ~$ cat > nginx-phpfpm.yml
---
apiVersion: v1
kind: Service
metadata:
name: nginx-phpfpm
spec:
type: NodePort
selector:
app: nginx-phpfpm
tier: back-end
ports:
- port: 8092
targetPort: 8092
nodePort: 30012
---
apiVersion: v1
kind: Pod
metadata:
name: nginx-phpfpm
labels:
app: nginx-phpfpm
tier: back-end
spec:
volumes:
- name: shared-files
emptyDir: {}
- name: nginx-config-volume
configMap:
name: nginx-config
containers:
- name: nginx-container
image: nginx:latest
volumeMounts:
- name: shared-files
mountPath: /var/www/html
- name: nginx-config-volume
mountPath: /etc/nginx/nginx.conf
subPath: nginx.conf
- name: php-fpm-container
image: php:8.2-fpm-alpine
volumeMounts:
- name: shared-files
mountPath: /var/www/html Apply and verify.
k apply -f . thor@jump_host ~$ k get po,svc,cm
NAME READY STATUS RESTARTS AGE
pod/nginx-phpfpm 2/2 Running 0 21s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 7m43s
service/nginx-phpfpm NodePort 10.96.180.197 <none> 8092:30012/TCP 21s
NAME DATA AGE
configmap/kube-root-ca.crt 1 7m27s
configmap/nginx-config 1 21sNext, check the index.php file first before copying it onto the nginx-container inside the pod we created.
thor@jump_host ~$ cat /opt/index.php
It works! k cp /opt/index.php nginx-phpfpm:/var/www/html/ -c nginx-container Check if the file is indeed copied onto the container.
thor@jump_host ~$ k exec -it nginx-phpfpm -c nginx-container -- ls -la /var/www/html
total 12
drwxrwxrwx 2 root root 4096 Aug 19 03:35 .
drwxr-xr-x 3 root root 4096 Aug 19 03:35 ..
-rw-r--r-- 1 root root 9 Aug 19 03:35 index.php
thor@jump_host ~$
thor@jump_host ~$ k exec -it nginx-phpfpm -c nginx-container -- cat /var/www/html/index.php
It works!Finally, verify by running the curl command inside the container. We can open shell on the container and run the curl inside it or we can simply run the curl directly using the exec command.
thor@jump_host ~$ k exec -it nginx-phpfpm -c nginx-container -- curl -I http://localhost:8092
HTTP/1.1 200 OK
Server: nginx/1.25.2
Date: Sat, 19 Aug 2023 03:30:33 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/7.2.34
thor@jump_host ~$ k exec -it nginx-phpfpm -c nginx-container -- curl http://localhost:8092
It works!Another way to verify if the app is publicly accessible is by clicking the App on the upper right to open the app in the new tab.
In the new tab:
