Task Requirements :

We deployed a Nginx and PHP-FPM based setup on the Kubernetes cluster last week and it has been working fine so far. This morning one of the team members made a change somewhere which caused some issues, and it stopped working. Please look into the issue and fix it:

• The pod name is nginx-phpfpm and the configmap name is nginx-config. Figure out the issue and fix the same.

• Once the issue is fixed, copy /home/thor/index.php file from the jump host to the nginx-container under nginx document root and you should be able to access the website using the Website button on the top bar.

Execution :

First, I'd check the logs for the nginx-phpfpm pod to identify the issue. You can check the logs of the nginx-phpfpm pod by using the following command

kubectl logs nginx-phpfpm

• The logs indicate that PHP-FPM is running and ready to handle connections, which is a good sign. Now, let's check the Nginx logs to see if there are any issues there.

kubectl logs nginx-phpfpm -c nginx-container

• It looks like the Nginx container is starting up without any apparent errors. The configuration seems to be complete.

• Since we don't have details about the changes made, let's start by checking the configuration in the nginx-config ConfigMap. We can compare it with the default Nginx configuration to see if there are any discrepancies.

kubectl get configmap nginx-config -o yaml

• Since the logs indicate that both Nginx and PHP-FPM are running without errors, the issue might likely be related to the PHP file or the website content.

So let's move on to copying the /home/thor/index.php file to the Nginx container, also explicitly specify the Nginx container for the copy operation.

kubectl cp /home/thor/index.php nginx-phpfpm:/var/www/html/index.php -c nginx-container

But in a case where /var/www/html directory might not exist in the Nginx container, let's create the directory first and then copy the index.php file into it.

kubectl exec -it nginx-phpfpm -c nginx-container -- mkdir -p /var/www/html

kubectl cp /home/thor/index.php nginx-phpfpm:/var/www/html/index.php -c nginx-container

• This sequence of commands creates the /var/www/html directory in the Nginx container and then copies the index.php file into it. Afterward, try accessing the website again.