53/100 Resolve VolumeMounts Issue in Kubernetes

We encountered an issue with our Nginx and PHP-FPM setup on the Kubernetes cluster this morning, which halted its functionality. Investigate and rectify the issue:

The pod name is nginx-phpfpm and configmap name is nginx-config. Identify and fix the problem. Once resolved, copy /home/thor/index.php file from the jump host to the nginx-container within the nginx document root. After this, you should be able to access the website using Website button on the top bar.

# Check existing running pods:

thor@jumphost ~$ kubectl get pods
NAME           READY   STATUS    RESTARTS   AGE
nginx-phpfpm   2/2     Running   0          2m28s

# Check the shared volume path in the existing config map
thor@jumphost ~$ kubectl get configmap
NAME               DATA   AGE
kube-root-ca.crt   1      5m2s
nginx-config       1      2m44  <-- This file

thor@jumphost ~$ kubectl describe configmap nginx-config
Name:         nginx-config
Namespace:    default
Labels:       <none>
Annotations:  <none>

Data
====
nginx.conf:
----
events {
}
http {
  server {
    listen 8099 default_server;
    listen [::]:8099 default_server;

    # Set nginx to serve files from the shared volume!
    root /var/www/html;
    index  index.html index.htm index.php;
    server_name _;
    location / {
      try_files $uri $uri/ =404;
    }
    location ~ \.php$ {
      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;
    }
  }
}

# Get the config yaml file from the running pod, save to tmp and review:
thor@jumphost ~$ kubectl get pod nginx-phpfpm -o yaml > /tmp/nginx.yaml
thor@jumphost ~$ cat /tmp/nginx.yaml 
--Snipped --
    volumeMounts:
    - mountPath: /usr/share/nginx/html  < this is incorrect should be /var/www/html

# Make revelant changes and then save file and post changes using force
thor@jumphost ~$ kubectl replace -f /tmp/nginx.yaml --force
pod "nginx-phpfpm" deleted
pod/nginx-phpfpm replaced

# Check pods running status time:
thor@jumphost ~$ kubectl get pods
NAME           READY   STATUS    RESTARTS   AGE
nginx-phpfpm   2/2     Running   0          25s

# Copy the index.php from jump host to the nginx-container
thor@jumphost ~$ kubectl cp /home/thor/index.php nginx-phpfpm:/var/www/html -c nginx-container