Fix issue with PhpFpm Application Deployed on Kubernetes

 Question :  We deployed an Nginx and PHPFPM based application on Kubernetes cluster last week and it had been working fine. This morning one of the team members was troubleshooting an issue with this stack and he was supposed to run Nginx welcome page for now on this stack till issue with phpfpm is fixed but he made a change somewhere which caused some issue and the application stopped working. Please look into the issue and fix the same:

The deployment name is nginx-phpfpm-dp and service name is nginx-service. Figure out the issues and fix them. FYI Nginx is configured to use default http port, node port is 30008 and copy index.php under /tmp/index.php to deployment under /var/www/html. Please do not try to delete/modify any other existing components like deployment name, service name etc.

Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.

Please Note :-  Perform the below commands based on your question server,  user name & other details that might differ. So please read the task carefully before executing it. 

All the Best 👍

Solution:  

1. Check existing running pods 

thor@jump_host ~$ kubectl get pods NAME                               READY   STATUS    RESTARTS   AGE nginx-phpfpm-dp-5cccd45499-57z9d   2/2     Running   0          94s thor@jump_host ~$

 2. check the shared volume path in the existing config map 

thor@jump_host ~$ kubectl get configmap NAME               DATA   AGE kube-root-ca.crt   1      42m nginx-config       1      5m51s thor@jump_host ~$ thor@jump_host ~$ kubectl describe configmap nginx-config Name:         nginx-config Namespace:    default Labels:       <none> Annotations:  <none>   Data ==== nginx.conf: ---- events { } http {   server {     listen 80 default_server;     listen [::]:80 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;     }   } }  Events:  <none> thor@jump_host ~$

3. Check the Services port to identify the error 

thor@jump_host ~$ kubectl get services NAME            TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE kubernetes      ClusterIP      10.96.0.1       <none>        443/TCP          35m nginx-service   LoadBalancer   10.96.250.183   <pending>     8093:30008/TCP   7m48s thor@jump_host ~$ thor@jump_host ~$ kubectl describe services Name:              kubernetes Namespace:         default Labels:            component=apiserver                    provider=kubernetes Annotations:       <none> Selector:          <none> Type:              ClusterIP IP:                10.96.0.1 Port:              https  443/TCP TargetPort:        6443/TCP Endpoints:         172.18.0.2:6443 Session Affinity:  None Events:            <none> Name:                     nginx-service Namespace:                default Labels:                   app=nginx-fpm Annotations:              <none> Selector:                 app=nginx-fpm,tier=frontend Type:                     LoadBalancer IP:                       10.96.250.183 Port:                     <unset>  8093/TCP TargetPort:               8093/TCP NodePort:                 <unset>  30008/TCP Endpoints:                10.244.0.5:8093 Session Affinity:         None External Traffic Policy:  Cluster Events:                   <none> thor@jump_host ~$

4. Kindly refer to the below video for the Configuration part

Happy Learning!!!!

Apart from this if you need more clarity,  I have made a  tutorial video on this, please go through and share your comments. Like and share the knowledge